{"id":9631,"date":"2026-09-01T07:34:34","date_gmt":"2026-09-01T07:34:34","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/"},"modified":"2026-09-01T07:35:52","modified_gmt":"2026-09-01T07:35:52","slug":"what-is-the-best-combination-for-molten-aluminum-purification","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/","title":{"rendered":"What Is the Best Combination for Molten Aluminum Purification?"},"content":{"rendered":"<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"363\" data-end=\"757\">Molten aluminum purification is not a single-step process. <strong data-start=\"422\" data-end=\"560\">No single treatment method can efficiently remove dissolved hydrogen, oxide films, and solid non-metallic inclusions at the same time.<\/strong> For most aluminum casting operations, a combination of furnace treatment, rotary degassing, and molten aluminum filtration provides a practical way to improve melt cleanliness and casting quality.<\/p>\n<p data-start=\"759\" data-end=\"797\">A commonly used treatment sequence is:<\/p>\n<p data-start=\"799\" data-end=\"895\"><strong data-start=\"799\" data-end=\"895\">Furnace treatment \u2192 Rotary degassing \u2192 Settling\/skimming \u2192 Ceramic foam filtration \u2192 Casting<\/strong><\/p>\n<p data-start=\"897\" data-end=\"1053\">For higher-quality aluminum products, the process may also include <strong data-start=\"964\" data-end=\"1052\">deep-bed filtration, flux treatment, grain refinement, or additional melt protection<\/strong>.<\/p>\n<p data-start=\"1055\" data-end=\"1206\">The right combination depends on the aluminum alloy, casting process, melt flow rate, hydrogen level, inclusion load, and required final metal quality.<\/p>\n<div id=\"attachment_9398\" style=\"width: 1810px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9398\" class=\"size-full wp-image-9398\" src=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/03\/8144_hogwCTvD.webp\" alt=\"\u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u0435 \u0434\u043b\u044f \u0434\u0435\u0433\u0430\u0437\u0430\u0446\u0438\u0438, \u0444\u0438\u043b\u044c\u0442\u0440 \u0438\u0437 \u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u043f\u0435\u043d\u044b, \u0444\u0438\u043b\u044c\u0442\u0440\u0443\u044e\u0449\u0438\u0439 \u0431\u043b\u043e\u043a \u0438 \u0431\u043b\u043e\u043a \u0441 \u0433\u043b\u0443\u0431\u043e\u043a\u0438\u043c \u0441\u043b\u043e\u0435\u043c \u043d\u0430\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044f\" width=\"1800\" height=\"1400\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/03\/8144_hogwCTvD.webp 1800w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/03\/8144_hogwCTvD-300x233.webp 300w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/03\/8144_hogwCTvD-1024x796.webp 1024w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/03\/8144_hogwCTvD-768x597.webp 768w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/03\/8144_hogwCTvD-1536x1195.webp 1536w\" sizes=\"auto, (max-width: 1800px) 100vw, 1800px\" \/><p id=\"caption-attachment-9398\" class=\"wp-caption-text\">\u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u0435 \u0434\u043b\u044f \u0434\u0435\u0433\u0430\u0437\u0430\u0446\u0438\u0438, \u0444\u0438\u043b\u044c\u0442\u0440 \u0438\u0437 \u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u043f\u0435\u043d\u044b, \u0444\u0438\u043b\u044c\u0442\u0440\u0443\u044e\u0449\u0438\u0439 \u0431\u043b\u043e\u043a \u0438 \u0431\u043b\u043e\u043a \u0441 \u0433\u043b\u0443\u0431\u043e\u043a\u0438\u043c \u0441\u043b\u043e\u0435\u043c \u043d\u0430\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044f<\/p><\/div>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u041f\u0435\u0440\u0435\u043a\u043b\u044e\u0447\u0438\u0442\u044c<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#Why_Does_Molten_Aluminum_Need_More_Than_One_Purification_Method\" >Why Does Molten Aluminum Need More Than One Purification Method?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#What_Is_the_Most_Common_Combination_for_Molten_Aluminum_Purification\" >What Is the Most Common Combination for Molten Aluminum Purification?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#Flux_Treatment_Rotary_Degassing_Ceramic_Foam_Filtration\" >Flux Treatment + Rotary Degassing + Ceramic Foam Filtration<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#Why_Combine_Rotary_Degassing_With_Ceramic_Foam_Filtration\" >Why Combine Rotary Degassing With Ceramic Foam Filtration?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#Rotary_degassing_removes_hydrogen\" >Rotary degassing removes hydrogen<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#Ceramic_foam_filtration_removes_inclusions\" >Ceramic foam filtration removes inclusions<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#Why_Should_Degassing_Usually_Come_Before_Final_Filtration\" >Why Should Degassing Usually Come Before Final Filtration?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#Which_Filtration_Method_Should_Be_Combined_With_Degassing\" >Which Filtration Method Should Be Combined With Degassing?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#Is_a_Higher_PPI_Ceramic_Foam_Filter_Always_Better\" >Is a Higher PPI Ceramic Foam Filter Always Better?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#What_Is_the_Best_Molten_Aluminum_Purification_Combination_for_Different_Applications\" >What Is the Best Molten Aluminum Purification Combination for Different Applications?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#How_Does_Recycled_Aluminum_Change_the_Purification_Strategy\" >How Does Recycled Aluminum Change the Purification Strategy?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#What_About_Deep-Bed_Filtration\" >What About Deep-Bed Filtration?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#What_Is_the_Recommended_Process_Sequence\" >What Is the Recommended Process Sequence?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#1_Melt_and_control_the_charge\" >1. Melt and control the charge<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#2_Apply_furnace-side_treatment\" >2. Apply furnace-side treatment<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#3_Perform_rotary_degassing\" >3. Perform rotary degassing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#4_Allow_separation_and_remove_surface_dross\" >4. Allow separation and remove surface dross<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#5_Filter_the_molten_aluminum\" >5. Filter the molten aluminum<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#6_Protect_the_melt_during_transfer\" >6. Protect the melt during transfer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#7_Cast_with_controlled_metal_flow\" >7. Cast with controlled metal flow<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#How_Do_You_Choose_the_Right_Purification_Combination\" >How Do You Choose the Right Purification Combination?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#1_Is_hydrogen_the_main_problem\" >1. Is hydrogen the main problem?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#2_Are_oxide_inclusions_the_main_problem\" >2. Are oxide inclusions the main problem?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#3_Is_the_melt_coming_from_a_high-scrap_charge\" >3. Is the melt coming from a high-scrap charge?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#4_What_is_the_required_casting_quality\" >4. What is the required casting quality?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#What_Is_the_Best_Combination_for_Molten_Aluminum_Purification\" >What Is the Best Combination for Molten Aluminum Purification?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/#FAQ\" >\u0427\u0430\u0441\u0442\u043e \u0437\u0430\u0434\u0430\u0432\u0430\u0435\u043c\u044b\u0435 \u0432\u043e\u043f\u0440\u043e\u0441\u044b<\/a><\/li><\/ul><\/nav><\/div>\n<h2 data-start=\"1208\" data-end=\"1275\"><span class=\"ez-toc-section\" id=\"Why_Does_Molten_Aluminum_Need_More_Than_One_Purification_Method\"><\/span>Why Does Molten Aluminum Need More Than One Purification Method?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"1277\" data-end=\"1359\">The main reason is that different impurities require different removal mechanisms.<\/p>\n<p data-start=\"1361\" data-end=\"1451\">The two most important targets are <strong data-start=\"1396\" data-end=\"1418\">dissolved hydrogen<\/strong> \u0438 <strong data-start=\"1423\" data-end=\"1450\">non-metallic inclusions<\/strong>.<\/p>\n<p data-start=\"1453\" data-end=\"1690\">Hydrogen can dissolve into molten aluminum and later form gas porosity during solidification. Oxide films, refractory particles, dross and other inclusions can also remain suspended in the melt and become defects in the finished casting.<\/p>\n<p data-start=\"1692\" data-end=\"2149\">Rotary inert-gas degassing is primarily designed to reduce dissolved hydrogen. Ceramic foam filtration, on the other hand, physically captures non-metallic inclusions as molten aluminum passes through its three-dimensional porous structure. Reviews of aluminum melt purification identify rotary injection as an established industrial degassing method and ceramic filtration as an important method for inclusion removal.<\/p>\n<p data-start=\"2151\" data-end=\"2187\">This creates an important principle:<\/p>\n<blockquote data-start=\"2189\" data-end=\"2274\">\n<p data-start=\"2191\" data-end=\"2274\"><strong data-start=\"2191\" data-end=\"2274\">Degassing and filtration are complementary processes, not interchangeable ones.<\/strong><\/p>\n<\/blockquote>\n<p data-start=\"2276\" data-end=\"2520\">A ceramic foam filter should not be selected as a substitute for proper degassing when hydrogen is the main problem. Likewise, degassing alone cannot provide the same level of physical inclusion removal as a properly selected filtration system.<\/p>\n<div class=\"mceTemp\"><\/div>\n<div id=\"attachment_9559\" style=\"width: 670px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9559\" class=\"size-full wp-image-9559\" src=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/01\/9.jpg\" alt=\"\u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u0435 \u0434\u043b\u044f \u0434\u0435\u0433\u0430\u0437\u0430\u0446\u0438\u0438 \u0432 \u0440\u0435\u0436\u0438\u043c\u0435 \u043e\u043d\u043b\u0430\u0439\u043d\" width=\"660\" height=\"494\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/01\/9.jpg 660w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/01\/9-300x225.jpg 300w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2021\/01\/9-16x12.jpg 16w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\" \/><p id=\"caption-attachment-9559\" class=\"wp-caption-text\"><em>\u043e\u0431\u043e\u0440\u0443\u0434\u043e\u0432\u0430\u043d\u0438\u0435 \u0434\u043b\u044f \u0434\u0435\u0433\u0430\u0437\u0430\u0446\u0438\u0438 \u0432 \u0440\u0435\u0436\u0438\u043c\u0435 \u043e\u043d\u043b\u0430\u0439\u043d<\/em><\/p><\/div>\n<div id=\"attachment_9596\" style=\"width: 1264px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9596\" class=\"size-full wp-image-9596\" src=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/ceramic-foam-filter\u4e3b\u56fe.webp\" alt=\"\u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u043f\u0435\u043d\u043e\u0444\u0438\u043b\u044c\u0442\u0440 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 AdTech \u0441 \u0440\u0430\u0441\u0448\u0438\u0440\u044f\u044e\u0449\u0435\u0439\u0441\u044f \u0443\u043f\u043b\u043e\u0442\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u043f\u0440\u043e\u043a\u043b\u0430\u0434\u043a\u043e\u0439\" width=\"1254\" height=\"1254\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/ceramic-foam-filter\u4e3b\u56fe.webp 1254w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/ceramic-foam-filter\u4e3b\u56fe-300x300.webp 300w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/ceramic-foam-filter\u4e3b\u56fe-1024x1024.webp 1024w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/ceramic-foam-filter\u4e3b\u56fe-150x150.webp 150w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/ceramic-foam-filter\u4e3b\u56fe-768x768.webp 768w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/ceramic-foam-filter\u4e3b\u56fe-12x12.webp 12w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/ceramic-foam-filter\u4e3b\u56fe-120x120.webp 120w\" sizes=\"auto, (max-width: 1254px) 100vw, 1254px\" \/><p id=\"caption-attachment-9596\" class=\"wp-caption-text\"><em>\u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u043f\u0435\u043d\u043e\u0444\u0438\u043b\u044c\u0442\u0440 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 AdTech \u0441 \u0440\u0430\u0441\u0448\u0438\u0440\u044f\u044e\u0449\u0435\u0439\u0441\u044f \u0443\u043f\u043b\u043e\u0442\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u043f\u0440\u043e\u043a\u043b\u0430\u0434\u043a\u043e\u0439<\/em><\/p><\/div>\n<p style=\"text-align: center;\" data-start=\"2234\" data-end=\"2419\"><a style=\"background-color: #fff3c4; display: inline-block; padding: 12px 28px; border-radius: 30px; color: #7a5a2a; text-decoration: none; font-size: 18px; font-weight: bold; text-align: center; border: 1px solid #E6D3A1;\" href=\"https:\/\/www.adtechaluminum.com\/contact\/\" target=\"_blank\" rel=\"noopener\">Contact Us to Learn More About Purification Methods<\/a><\/p>\n<h2 data-start=\"2527\" data-end=\"2599\"><span class=\"ez-toc-section\" id=\"What_Is_the_Most_Common_Combination_for_Molten_Aluminum_Purification\"><\/span>What Is the Most Common Combination for Molten Aluminum Purification?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"2601\" data-end=\"2681\">For many conventional aluminum casting applications, a practical combination is:<\/p>\n<h3 data-start=\"2683\" data-end=\"2750\"><span class=\"ez-toc-section\" id=\"Flux_Treatment_Rotary_Degassing_Ceramic_Foam_Filtration\"><\/span><span role=\"text\"><strong data-start=\"2687\" data-end=\"2750\">Flux Treatment + Rotary Degassing + Ceramic Foam Filtration<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"2752\" data-end=\"2783\">Each stage has a different job.<\/p>\n<div class=\"group TyagGW_tableContainer\">\n<div class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2785\" data-end=\"3349\">\n<thead data-start=\"2785\" data-end=\"2834\">\n<tr data-start=\"2785\" data-end=\"2834\">\n<th class=\"last:pe-10\" data-start=\"2785\" data-end=\"2804\" data-col-size=\"sm\">Treatment method<\/th>\n<th class=\"last:pe-10\" data-start=\"2804\" data-end=\"2818\" data-col-size=\"sm\">Main target<\/th>\n<th class=\"last:pe-10\" data-start=\"2818\" data-end=\"2834\" data-col-size=\"sm\">Typical role<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2849\" data-end=\"3349\">\n<tr data-start=\"2849\" data-end=\"2942\">\n<td data-start=\"2849\" data-end=\"2866\" data-col-size=\"sm\">\u041e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0430 \u0444\u043b\u044e\u0441\u043e\u043c<\/td>\n<td data-start=\"2866\" data-end=\"2909\" data-col-size=\"sm\">Oxides, dross, certain unwanted elements<\/td>\n<td data-col-size=\"sm\" data-start=\"2909\" data-end=\"2942\">Furnace-side melt preparation<\/td>\n<\/tr>\n<tr data-start=\"2943\" data-end=\"3021\">\n<td data-start=\"2943\" data-end=\"2962\" data-col-size=\"sm\">\u0420\u043e\u0442\u0430\u0446\u0438\u043e\u043d\u043d\u0430\u044f \u0434\u0435\u0433\u0430\u0437\u0430\u0446\u0438\u044f<\/td>\n<td data-col-size=\"sm\" data-start=\"2962\" data-end=\"2983\">\u0420\u0430\u0441\u0442\u0432\u043e\u0440\u0435\u043d\u043d\u044b\u0439 \u0432\u043e\u0434\u043e\u0440\u043e\u0434<\/td>\n<td data-col-size=\"sm\" data-start=\"2983\" data-end=\"3021\">Hydrogen removal and melt cleaning<\/td>\n<\/tr>\n<tr data-start=\"3022\" data-end=\"3117\">\n<td data-start=\"3022\" data-end=\"3044\" data-col-size=\"sm\">Settling &amp; skimming<\/td>\n<td data-start=\"3044\" data-end=\"3075\" data-col-size=\"sm\">Floated dross and inclusions<\/td>\n<td data-col-size=\"sm\" data-start=\"3075\" data-end=\"3117\">Remove material brought to the surface<\/td>\n<\/tr>\n<tr data-start=\"3118\" data-end=\"3211\">\n<td data-start=\"3118\" data-end=\"3144\" data-col-size=\"sm\">\u0424\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u044f \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u043f\u0435\u043d\u044b<\/td>\n<td data-start=\"3144\" data-end=\"3186\" data-col-size=\"sm\">Oxide films and non-metallic inclusions<\/td>\n<td data-col-size=\"sm\" data-start=\"3186\" data-end=\"3211\">Final melt filtration<\/td>\n<\/tr>\n<tr data-start=\"3212\" data-end=\"3285\">\n<td data-start=\"3212\" data-end=\"3234\" data-col-size=\"sm\">\u0424\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u044f \u0432 \u0442\u043e\u043b\u0441\u0442\u043e\u043c \u0441\u043b\u043e\u0435<\/td>\n<td data-col-size=\"sm\" data-start=\"3234\" data-end=\"3252\">\u041c\u0435\u043b\u043a\u0438\u0435 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f<\/td>\n<td data-col-size=\"sm\" data-start=\"3252\" data-end=\"3285\">High-cleanliness applications<\/td>\n<\/tr>\n<tr data-start=\"3286\" data-end=\"3349\">\n<td data-start=\"3286\" data-end=\"3305\" data-col-size=\"sm\">Grain refinement<\/td>\n<td data-start=\"3305\" data-end=\"3323\" data-col-size=\"sm\">\u0421\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u0430 \u0437\u0435\u0440\u043d\u0430<\/td>\n<td data-start=\"3323\" data-end=\"3349\" data-col-size=\"sm\">\u041a\u043e\u043d\u0442\u0440\u043e\u043b\u044c \u043c\u0438\u043a\u0440\u043e\u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u044b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"3351\" data-end=\"3516\">The important point is not simply adding more treatment steps. <strong data-start=\"3414\" data-end=\"3516\">Each stage should reduce a specific type of contamination before the metal reaches the next stage.<\/strong><\/p>\n<p data-start=\"3518\" data-end=\"3830\">For example, furnace treatment and skimming can reduce the amount of oxide and dross entering the downstream system. Rotary degassing then targets dissolved hydrogen and helps float some inclusions. A downstream ceramic foam filter captures remaining solid inclusions before the metal enters the casting process.<\/p>\n<p data-start=\"3832\" data-end=\"3991\">This sequential approach is also reflected in published industrial and technical descriptions of aluminum melt treatment.<\/p>\n<h2 data-start=\"3998\" data-end=\"4059\"><span class=\"ez-toc-section\" id=\"Why_Combine_Rotary_Degassing_With_Ceramic_Foam_Filtration\"><\/span>Why Combine Rotary Degassing With Ceramic Foam Filtration?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"4061\" data-end=\"4157\">This is one of the most important questions when designing an aluminum melt purification system.<\/p>\n<h3 data-start=\"4159\" data-end=\"4196\"><span class=\"ez-toc-section\" id=\"Rotary_degassing_removes_hydrogen\"><\/span>Rotary degassing removes hydrogen<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4198\" data-end=\"4408\">During rotary degassing, an inert gas such as argon or nitrogen is introduced into molten aluminum through a rotating rotor. The rotor disperses the gas into fine bubbles, increasing the gas-metal contact area.<\/p>\n<p data-start=\"4410\" data-end=\"4517\">Dissolved hydrogen can diffuse into the bubbles and then leave the melt as the bubbles rise to the surface.<\/p>\n<p data-start=\"4519\" data-end=\"4779\">The rotary injection method is widely studied because rotating gas injection produces smaller and more uniformly distributed bubbles than simpler gas-purging arrangements, improving gas-liquid contact and hydrogen removal.<\/p>\n<div id=\"attachment_9603\" style=\"width: 418px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9603\" class=\"wp-image-9603\" src=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/09\/aluminum-degassing.webp\" alt=\"\u0434\u0435\u0433\u0430\u0437\u0430\u0446\u0438\u044f \u0430\u043b\u044e\u043c\u0438\u043d\u0438\u044f\" width=\"408\" height=\"326\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/09\/aluminum-degassing.webp 300w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/09\/aluminum-degassing-15x12.webp 15w\" sizes=\"auto, (max-width: 408px) 100vw, 408px\" \/><p id=\"caption-attachment-9603\" class=\"wp-caption-text\"><em>\u0434\u0435\u0433\u0430\u0437\u0430\u0446\u0438\u044f \u0430\u043b\u044e\u043c\u0438\u043d\u0438\u044f<\/em><\/p><\/div>\n<h3 data-start=\"4781\" data-end=\"4827\"><span class=\"ez-toc-section\" id=\"Ceramic_foam_filtration_removes_inclusions\"><\/span>Ceramic foam filtration removes inclusions<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"4829\" data-end=\"5070\">A ceramic foam filter uses an interconnected three-dimensional pore structure. As molten aluminum passes through the filter, inclusions can be captured through mechanisms including direct interception, adhesion and changes in flow direction.<\/p>\n<p data-start=\"5072\" data-end=\"5140\">This makes ceramic foam filtration particularly useful for removing:<\/p>\n<ul data-start=\"5142\" data-end=\"5267\">\n<li data-start=\"5142\" data-end=\"5155\">\u041e\u043a\u0441\u0438\u0434\u043d\u044b\u0435 \u043f\u043b\u0435\u043d\u043a\u0438<\/li>\n<li data-start=\"5156\" data-end=\"5180\">Non-metallic particles<\/li>\n<li data-start=\"5181\" data-end=\"5207\">Dross-related inclusions<\/li>\n<li data-start=\"5208\" data-end=\"5230\">Refractory particles<\/li>\n<li data-start=\"5231\" data-end=\"5267\">Other suspended solid contaminants<\/li>\n<\/ul>\n<p data-start=\"5269\" data-end=\"5463\">Ceramic foam filters are widely used for molten-metal purification because their open-cell structure combines permeability with effective inclusion capture.<\/p>\n<div id=\"attachment_9371\" style=\"width: 2570px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9371\" class=\"size-full wp-image-9371\" src=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/10\/\u9676\u74f7\u8fc7\u6ee4\u677f2-1-scaled.jpg\" alt=\"\u041a\u0440\u0443\u043f\u043d\u044b\u0439 \u043f\u043b\u0430\u043d \u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0444\u0438\u043b\u044c\u0442\u0440\u0443\u044e\u0449\u0435\u0439 \u043f\u043b\u0430\u0441\u0442\u0438\u043d\u044b \u0441 \u043f\u0435\u043d\u043e\u043e\u0431\u0440\u0430\u0437\u043d\u043e\u0439 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u043e\u0439 \u0438 \u0440\u0430\u0432\u043d\u043e\u043c\u0435\u0440\u043d\u044b\u043c \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435\u043c \u043f\u043e\u0440, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u043e\u0439 \u0434\u043b\u044f \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0439 \u0438\u0437 \u0440\u0430\u0441\u043f\u043b\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0430\u043b\u044e\u043c\u0438\u043d\u0438\u044f.\" width=\"2560\" height=\"1707\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/10\/\u9676\u74f7\u8fc7\u6ee4\u677f2-1-scaled.jpg 2560w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/10\/\u9676\u74f7\u8fc7\u6ee4\u677f2-1-300x200.jpg 300w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/10\/\u9676\u74f7\u8fc7\u6ee4\u677f2-1-1024x683.jpg 1024w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/10\/\u9676\u74f7\u8fc7\u6ee4\u677f2-1-768x512.jpg 768w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/10\/\u9676\u74f7\u8fc7\u6ee4\u677f2-1-1536x1024.jpg 1536w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/10\/\u9676\u74f7\u8fc7\u6ee4\u677f2-1-2048x1365.jpg 2048w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><p id=\"caption-attachment-9371\" class=\"wp-caption-text\"><em>\u041a\u0440\u0443\u043f\u043d\u044b\u0439 \u043f\u043b\u0430\u043d \u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u043e\u0439 \u0444\u0438\u043b\u044c\u0442\u0440\u0443\u044e\u0449\u0435\u0439 \u043f\u043b\u0430\u0441\u0442\u0438\u043d\u044b \u0441 \u043f\u0435\u043d\u043e\u043e\u0431\u0440\u0430\u0437\u043d\u043e\u0439 \u0441\u0442\u0440\u0443\u043a\u0442\u0443\u0440\u043e\u0439 \u0438 \u0440\u0430\u0432\u043d\u043e\u043c\u0435\u0440\u043d\u044b\u043c \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0435\u043d\u0438\u0435\u043c \u043f\u043e\u0440, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u043e\u0439 \u0434\u043b\u044f \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0439 \u0438\u0437 \u0440\u0430\u0441\u043f\u043b\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0430\u043b\u044e\u043c\u0438\u043d\u0438\u044f.<\/em><\/p><\/div>\n<p data-start=\"5465\" data-end=\"5475\">Therefore:<\/p>\n<p data-start=\"5477\" data-end=\"5527\"><strong data-start=\"5477\" data-end=\"5527\">Rotary degassing \u2192 primarily controls hydrogen<\/strong><\/p>\n<p data-start=\"5529\" data-end=\"5594\"><strong data-start=\"5529\" data-end=\"5594\">Ceramic foam filtration \u2192 primarily controls solid inclusions<\/strong><\/p>\n<p data-start=\"5596\" data-end=\"5670\">Using both addresses two different causes of poor molten aluminum quality.<\/p>\n<h2 data-start=\"5677\" data-end=\"5738\"><span class=\"ez-toc-section\" id=\"Why_Should_Degassing_Usually_Come_Before_Final_Filtration\"><\/span>Why Should Degassing Usually Come Before Final Filtration?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"5740\" data-end=\"5761\">The sequence matters.<\/p>\n<p data-start=\"5763\" data-end=\"5790\">A practical arrangement is:<\/p>\n<p data-start=\"5792\" data-end=\"5838\"><strong data-start=\"5792\" data-end=\"5838\">Furnace \u2192 Degassing \u2192 Filtration \u2192 Casting<\/strong><\/p>\n<p data-start=\"5840\" data-end=\"5904\">rather than placing the final filter before the degassing stage.<\/p>\n<p data-start=\"5906\" data-end=\"6246\">Rotary degassing creates significant melt movement and gas bubbling. This treatment can also bring inclusions toward the surface or change the distribution of oxide particles in the melt. Placing the final filtration step downstream gives the filter an opportunity to capture residual inclusions before the metal reaches the mold or caster.<\/p>\n<p data-start=\"6248\" data-end=\"6346\">The exact arrangement depends on the equipment configuration, but the general principle is simple:<\/p>\n<blockquote data-start=\"6348\" data-end=\"6490\">\n<p data-start=\"6350\" data-end=\"6490\"><strong data-start=\"6350\" data-end=\"6490\">Use upstream treatments to reduce the impurity load, then use final filtration to protect the casting process from remaining inclusions.<\/strong><\/p>\n<\/blockquote>\n<p data-start=\"6492\" data-end=\"6680\">This is particularly important for quality-sensitive products where even a relatively small number of inclusions can affect mechanical properties, surface quality or downstream processing.<\/p>\n<h2 data-start=\"6687\" data-end=\"6748\"><span class=\"ez-toc-section\" id=\"Which_Filtration_Method_Should_Be_Combined_With_Degassing\"><\/span>Which Filtration Method Should Be Combined With Degassing?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"6750\" data-end=\"6797\">Ceramic foam filtration is not the only option.<\/p>\n<p data-start=\"6799\" data-end=\"6902\">The appropriate filtration technology depends heavily on production scale and cleanliness requirements.<\/p>\n<div class=\"group TyagGW_tableContainer\">\n<div class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"6904\" data-end=\"7498\">\n<thead data-start=\"6904\" data-end=\"6980\">\n<tr data-start=\"6904\" data-end=\"6980\">\n<th class=\"last:pe-10\" data-start=\"6904\" data-end=\"6924\" data-col-size=\"sm\">Filtration method<\/th>\n<th class=\"last:pe-10\" data-start=\"6924\" data-end=\"6944\" data-col-size=\"sm\">\u0423\u0434\u0430\u043b\u0435\u043d\u0438\u0435 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f<\/th>\n<th class=\"last:pe-10\" data-start=\"6944\" data-end=\"6958\" data-col-size=\"sm\">Typical use<\/th>\n<th class=\"last:pe-10\" data-start=\"6958\" data-end=\"6980\" data-col-size=\"sm\">Main consideration<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"6999\" data-end=\"7498\">\n<tr data-start=\"6999\" data-end=\"7087\">\n<td data-start=\"6999\" data-end=\"7021\" data-col-size=\"sm\">\u041a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u043f\u0435\u043d\u043e\u043f\u043b\u0430\u0441\u0442\u043e\u0432\u044b\u0439 \u0444\u0438\u043b\u044c\u0442\u0440<\/td>\n<td data-start=\"7021\" data-end=\"7028\" data-col-size=\"sm\">\u0412\u044b\u0441\u043e\u043a\u0438\u0439<\/td>\n<td data-start=\"7028\" data-end=\"7055\" data-col-size=\"sm\">General aluminum casting<\/td>\n<td data-col-size=\"sm\" data-start=\"7055\" data-end=\"7087\">Simple, flexible, consumable<\/td>\n<\/tr>\n<tr data-start=\"7088\" data-end=\"7197\">\n<td data-start=\"7088\" data-end=\"7106\" data-col-size=\"sm\">Deep-bed filter<\/td>\n<td data-start=\"7106\" data-end=\"7118\" data-col-size=\"sm\">\u041e\u0447\u0435\u043d\u044c \u0432\u044b\u0441\u043e\u043a\u0438\u0439<\/td>\n<td data-start=\"7118\" data-end=\"7158\" data-col-size=\"sm\">High-volume, high-cleanliness casting<\/td>\n<td data-col-size=\"sm\" data-start=\"7158\" data-end=\"7197\">Larger system and higher investment<\/td>\n<\/tr>\n<tr data-start=\"7198\" data-end=\"7309\">\n<td data-start=\"7198\" data-end=\"7234\" data-col-size=\"sm\">Ceramic tube\/cartridge filtration<\/td>\n<td data-col-size=\"sm\" data-start=\"7234\" data-end=\"7241\">\u0412\u044b\u0441\u043e\u043a\u0438\u0439<\/td>\n<td data-col-size=\"sm\" data-start=\"7241\" data-end=\"7274\">Specialized filtration systems<\/td>\n<td data-col-size=\"sm\" data-start=\"7274\" data-end=\"7309\">Filter design and flow capacity<\/td>\n<\/tr>\n<tr data-start=\"7310\" data-end=\"7409\">\n<td data-start=\"7310\" data-end=\"7329\" data-col-size=\"sm\">Settling chamber<\/td>\n<td data-col-size=\"sm\" data-start=\"7329\" data-end=\"7349\">Coarse separation<\/td>\n<td data-col-size=\"sm\" data-start=\"7349\" data-end=\"7375\">Upstream melt treatment<\/td>\n<td data-col-size=\"sm\" data-start=\"7375\" data-end=\"7409\">Limited fine-inclusion removal<\/td>\n<\/tr>\n<tr data-start=\"7410\" data-end=\"7498\">\n<td data-start=\"7410\" data-end=\"7435\" data-col-size=\"sm\">Multi-stage filtration<\/td>\n<td data-col-size=\"sm\" data-start=\"7435\" data-end=\"7447\">\u041e\u0447\u0435\u043d\u044c \u0432\u044b\u0441\u043e\u043a\u0438\u0439<\/td>\n<td data-col-size=\"sm\" data-start=\"7447\" data-end=\"7475\">High-quality applications<\/td>\n<td data-col-size=\"sm\" data-start=\"7475\" data-end=\"7498\">More complex system<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"7500\" data-end=\"7620\">A ceramic foam filter is often a practical choice when flexibility, installation space and operating cost are important.<\/p>\n<p data-start=\"7622\" data-end=\"7825\">Deep-bed filtration becomes more attractive when the operation requires <strong data-start=\"7694\" data-end=\"7765\">continuous high-throughput filtration and very low inclusion levels<\/strong>, particularly in large primary aluminum casting operations.<\/p>\n<p data-start=\"7827\" data-end=\"7921\">The choice should therefore not be based simply on which filter has the finest pore structure.<\/p>\n<div id=\"attachment_9632\" style=\"width: 2570px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9632\" class=\"size-full wp-image-9632\" src=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/different-ppi-of-CFF-scaled.webp\" alt=\"different ppi of CFF\" width=\"2560\" height=\"1273\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/different-ppi-of-CFF-scaled.webp 2560w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/different-ppi-of-CFF-300x149.webp 300w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/different-ppi-of-CFF-1024x509.webp 1024w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/different-ppi-of-CFF-768x382.webp 768w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/different-ppi-of-CFF-1536x764.webp 1536w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/different-ppi-of-CFF-2048x1018.webp 2048w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/different-ppi-of-CFF-18x9.webp 18w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><p id=\"caption-attachment-9632\" class=\"wp-caption-text\"><em>different ppi of CFF<\/em><\/p><\/div>\n<h2 data-start=\"7928\" data-end=\"7981\"><span class=\"ez-toc-section\" id=\"Is_a_Higher_PPI_Ceramic_Foam_Filter_Always_Better\"><\/span>Is a Higher PPI Ceramic Foam Filter Always Better?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"7983\" data-end=\"7986\">No.<\/p>\n<p data-start=\"7988\" data-end=\"8056\">A higher PPI does not automatically mean a better filtration system.<\/p>\n<p data-start=\"8058\" data-end=\"8269\">PPI refers to <strong data-start=\"8072\" data-end=\"8090\">pores per inch<\/strong>, and increasing PPI generally produces a finer pore structure. This can improve the capture of smaller inclusions, but it can also increase pressure drop and reduce permeability.<\/p>\n<p data-start=\"8271\" data-end=\"8322\">For this reason, filter selection needs to balance:<\/p>\n<ul data-start=\"8324\" data-end=\"8519\">\n<li data-start=\"8324\" data-end=\"8354\">\u042d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0441\u0442\u044c \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0439<\/li>\n<li data-start=\"8355\" data-end=\"8382\">Molten aluminum flow rate<\/li>\n<li data-start=\"8383\" data-end=\"8414\">Required filtration precision<\/li>\n<li data-start=\"8415\" data-end=\"8442\">Available filtration area<\/li>\n<li data-start=\"8443\" data-end=\"8466\">Alloy characteristics<\/li>\n<li data-start=\"8467\" data-end=\"8480\">\u0422\u0435\u043c\u043f\u0435\u0440\u0430\u0442\u0443\u0440\u0430<\/li>\n<li data-start=\"8481\" data-end=\"8496\">Pressure head<\/li>\n<li data-start=\"8497\" data-end=\"8519\">Expected filter life<\/li>\n<\/ul>\n<p data-start=\"8521\" data-end=\"8638\">For example, a high-flow casting line may need a larger filter area rather than simply selecting a much finer filter.<\/p>\n<p data-start=\"8640\" data-end=\"8726\">In practical system design, <strong data-start=\"8668\" data-end=\"8725\">filtration area and PPI should be considered together<\/strong>.<\/p>\n<p data-start=\"8728\" data-end=\"8953\">A recent technical review also emphasizes that ceramic foam filter performance depends on its porous structure, material properties and filtration behavior rather than on pore size alone.<\/p>\n<h2 data-start=\"8960\" data-end=\"9048\"><span class=\"ez-toc-section\" id=\"What_Is_the_Best_Molten_Aluminum_Purification_Combination_for_Different_Applications\"><\/span>What Is the Best Molten Aluminum Purification Combination for Different Applications?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"9050\" data-end=\"9174\">There is no universal configuration. A more useful approach is to match the treatment system to the production requirements.<\/p>\n<div class=\"group TyagGW_tableContainer\">\n<div class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"9176\" data-end=\"10023\">\n<thead data-start=\"9176\" data-end=\"9242\">\n<tr data-start=\"9176\" data-end=\"9242\">\n<th class=\"last:pe-10\" data-start=\"9176\" data-end=\"9190\" data-col-size=\"sm\">\u0417\u0430\u044f\u0432\u043a\u0430<\/th>\n<th class=\"last:pe-10\" data-start=\"9190\" data-end=\"9225\" data-col-size=\"md\">Typical purification combination<\/th>\n<th class=\"last:pe-10\" data-start=\"9225\" data-end=\"9242\" data-col-size=\"sm\">Main priority<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"9257\" data-end=\"10023\">\n<tr data-start=\"9257\" data-end=\"9354\">\n<td data-start=\"9257\" data-end=\"9284\" data-col-size=\"sm\">General aluminum casting<\/td>\n<td data-start=\"9284\" data-end=\"9326\" data-col-size=\"md\">Flux treatment + rotary degassing + CFF<\/td>\n<td data-col-size=\"sm\" data-start=\"9326\" data-end=\"9354\">Overall melt cleanliness<\/td>\n<\/tr>\n<tr data-start=\"9355\" data-end=\"9421\">\n<td data-start=\"9355\" data-end=\"9369\" data-col-size=\"sm\">Die casting<\/td>\n<td data-col-size=\"md\" data-start=\"9369\" data-end=\"9394\">Rotary degassing + CFF<\/td>\n<td data-col-size=\"sm\" data-start=\"9394\" data-end=\"9421\">Hydrogen and inclusions<\/td>\n<\/tr>\n<tr data-start=\"9422\" data-end=\"9516\">\n<td data-start=\"9422\" data-end=\"9445\" data-col-size=\"sm\">Low-pressure casting<\/td>\n<td data-start=\"9445\" data-end=\"9482\" data-col-size=\"md\">Rotary degassing + fine filtration<\/td>\n<td data-col-size=\"sm\" data-start=\"9482\" data-end=\"9516\">Porosity and inclusion control<\/td>\n<\/tr>\n<tr data-start=\"9517\" data-end=\"9594\">\n<td data-start=\"9517\" data-end=\"9534\" data-col-size=\"sm\">\u041b\u0438\u0442\u044c\u0435 \u0437\u0430\u0433\u043e\u0442\u043e\u0432\u043e\u043a<\/td>\n<td data-start=\"9534\" data-end=\"9567\" data-col-size=\"md\">In-line degassing + filtration<\/td>\n<td data-col-size=\"sm\" data-start=\"9567\" data-end=\"9594\">Consistent melt quality<\/td>\n<\/tr>\n<tr data-start=\"9595\" data-end=\"9692\">\n<td data-start=\"9595\" data-end=\"9610\" data-col-size=\"sm\">\u041b\u0438\u0442\u044c\u0435 \u0432 \u0441\u043b\u0438\u0442\u043a\u0438<\/td>\n<td data-start=\"9610\" data-end=\"9652\" data-col-size=\"md\">In-line degassing + deep-bed filtration<\/td>\n<td data-col-size=\"sm\" data-start=\"9652\" data-end=\"9692\">High cleanliness and high throughput<\/td>\n<\/tr>\n<tr data-start=\"9693\" data-end=\"9798\">\n<td data-start=\"9693\" data-end=\"9715\" data-col-size=\"sm\">\u0417\u0430\u043f\u0430\u0441 \u0430\u043b\u044e\u043c\u0438\u043d\u0438\u0435\u0432\u043e\u0439 \u0444\u043e\u043b\u044c\u0433\u0438<\/td>\n<td data-col-size=\"md\" data-start=\"9715\" data-end=\"9764\">Intensive degassing + fine\/deep-bed filtration<\/td>\n<td data-col-size=\"sm\" data-start=\"9764\" data-end=\"9798\">Extremely low inclusion levels<\/td>\n<\/tr>\n<tr data-start=\"9799\" data-end=\"9903\">\n<td data-start=\"9799\" data-end=\"9831\" data-col-size=\"sm\">\u0412\u044b\u0441\u043e\u043a\u043e\u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u0430\u044f \u0437\u0430\u0433\u043e\u0442\u043e\u0432\u043a\u0430 \u0434\u043b\u044f \u044d\u043a\u0441\u0442\u0440\u0443\u0437\u0438\u0438<\/td>\n<td data-col-size=\"md\" data-start=\"9831\" data-end=\"9869\">Degassing + deep-bed\/CFF filtration<\/td>\n<td data-col-size=\"sm\" data-start=\"9869\" data-end=\"9903\">Inclusion and hydrogen control<\/td>\n<\/tr>\n<tr data-start=\"9904\" data-end=\"10023\">\n<td data-start=\"9904\" data-end=\"9939\" data-col-size=\"sm\">High-inclusion recycled aluminum<\/td>\n<td data-col-size=\"md\" data-start=\"9939\" data-end=\"9998\">Flux treatment + intensive degassing + staged filtration<\/td>\n<td data-col-size=\"sm\" data-start=\"9998\" data-end=\"10023\">High contaminant load<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"10025\" data-end=\"10230\">These are <strong data-start=\"10035\" data-end=\"10088\">starting configurations rather than fixed recipes<\/strong>. A casting operation processing clean primary aluminum may need a very different system from one melting a high proportion of recycled scrap.<\/p>\n<p style=\"text-align: center;\" data-start=\"2234\" data-end=\"2419\"><a style=\"background-color: #fff3c4; display: inline-block; padding: 12px 28px; border-radius: 30px; color: #7a5a2a; text-decoration: none; font-size: 18px; font-weight: bold; text-align: center; border: 1px solid #E6D3A1;\" href=\"https:\/\/www.adtechaluminum.com\/product\/ceramic-foam-filter\/\" target=\"_blank\" rel=\"noopener\">Learn More About Our Molten-Aluminum Treatment<\/a><\/p>\n<h2 data-start=\"10237\" data-end=\"10300\"><span class=\"ez-toc-section\" id=\"How_Does_Recycled_Aluminum_Change_the_Purification_Strategy\"><\/span>How Does Recycled Aluminum Change the Purification Strategy?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"10302\" data-end=\"10377\">The charge material is one of the biggest factors affecting melt treatment.<\/p>\n<p data-start=\"10379\" data-end=\"10428\">Recycled aluminum can introduce a higher load of:<\/p>\n<ul data-start=\"10430\" data-end=\"10539\">\n<li data-start=\"10430\" data-end=\"10443\">\u041e\u043a\u0441\u0438\u0434\u043d\u044b\u0435 \u043f\u043b\u0435\u043d\u043a\u0438<\/li>\n<li data-start=\"10444\" data-end=\"10451\">Dross<\/li>\n<li data-start=\"10452\" data-end=\"10474\">Refractory particles<\/li>\n<li data-start=\"10475\" data-end=\"10502\">Coatings and contaminants<\/li>\n<li data-start=\"10503\" data-end=\"10513\">Hydrogen<\/li>\n<li data-start=\"10514\" data-end=\"10539\">Other unwanted elements<\/li>\n<\/ul>\n<p data-start=\"10541\" data-end=\"10636\">In this situation, relying on a single ceramic foam filter can overload the filter prematurely.<\/p>\n<p data-start=\"10638\" data-end=\"10721\">A better strategy is often to <strong data-start=\"10668\" data-end=\"10720\">reduce the impurity load before the final filter<\/strong>.<\/p>\n<p data-start=\"10723\" data-end=\"10735\">\u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440:<\/p>\n<p data-start=\"10737\" data-end=\"10848\"><strong data-start=\"10737\" data-end=\"10848\">Scrap preparation \u2192 Furnace melting \u2192 Flux treatment \u2192 Degassing \u2192 Settling\/skimming \u2192 Filtration \u2192 Casting<\/strong><\/p>\n<p data-start=\"10850\" data-end=\"11046\">The purpose of this sequence is not to make the ceramic filter do everything. Instead, upstream treatment removes or separates as much contamination as practical before the final filtration stage.<\/p>\n<p data-start=\"11048\" data-end=\"11136\">This can help maintain a more stable flow rate and extend effective filter service life.<\/p>\n<h2 data-start=\"11143\" data-end=\"11177\"><span class=\"ez-toc-section\" id=\"What_About_Deep-Bed_Filtration\"><\/span>What About Deep-Bed Filtration?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"11179\" data-end=\"11341\">For large-scale aluminum production requiring very high cleanliness, ceramic foam filtration may be combined with or replaced by a <strong data-start=\"11310\" data-end=\"11340\">deep-bed filtration system<\/strong>.<\/p>\n<p data-start=\"11343\" data-end=\"11550\">Unlike a thin ceramic foam filter, a deep-bed system forces the molten metal through a relatively thick filtration medium. The larger filtration bed provides more opportunities for inclusions to be captured.<\/p>\n<p data-start=\"11552\" data-end=\"11610\">Deep-bed filtration is therefore particularly relevant to:<\/p>\n<ul data-start=\"11612\" data-end=\"11769\">\n<li data-start=\"11612\" data-end=\"11630\">Primary aluminum<\/li>\n<li data-start=\"11631\" data-end=\"11650\">\u041b\u0438\u0442\u044c\u0435 \u0437\u0430\u0433\u043e\u0442\u043e\u0432\u043e\u043a \u0438\u0437 DC<\/li>\n<li data-start=\"11651\" data-end=\"11665\">\u041b\u0438\u0442\u044c\u0435 \u0432 \u0441\u043b\u0438\u0442\u043a\u0438<\/li>\n<li data-start=\"11666\" data-end=\"11690\">High-volume production<\/li>\n<li data-start=\"11691\" data-end=\"11719\">High-quality rolling stock<\/li>\n<li data-start=\"11720\" data-end=\"11769\">Applications with strict inclusion requirements<\/li>\n<\/ul>\n<p data-start=\"11771\" data-end=\"11905\">However, deep-bed systems generally require more equipment, refractory material and process control than a simple ceramic foam filter.<\/p>\n<p data-start=\"11907\" data-end=\"12023\">The best solution is therefore determined by the production requirements rather than by filtration efficiency alone.<\/p>\n<div id=\"attachment_9633\" style=\"width: 2570px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9633\" class=\"size-full wp-image-9633\" src=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/6883_jgWES98J-scaled.webp\" alt=\"\u0433\u043b\u0443\u0431\u043e\u043a\u0430\u044f \u0444\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u044f\" width=\"2560\" height=\"1707\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/6883_jgWES98J-scaled.webp 2560w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/6883_jgWES98J-300x200.webp 300w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/6883_jgWES98J-1024x683.webp 1024w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/6883_jgWES98J-768x512.webp 768w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/6883_jgWES98J-1536x1024.webp 1536w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/6883_jgWES98J-2048x1365.webp 2048w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2026\/09\/6883_jgWES98J-18x12.webp 18w\" sizes=\"auto, (max-width: 2560px) 100vw, 2560px\" \/><p id=\"caption-attachment-9633\" class=\"wp-caption-text\"><em>\u0433\u043b\u0443\u0431\u043e\u043a\u0430\u044f \u0444\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u044f<\/em><\/p><\/div>\n<h2 data-start=\"12030\" data-end=\"12074\"><span class=\"ez-toc-section\" id=\"What_Is_the_Recommended_Process_Sequence\"><\/span>What Is the Recommended Process Sequence?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"12076\" data-end=\"12154\">For a typical aluminum casting operation, a practical melt treatment train is:<\/p>\n<h3 data-start=\"12156\" data-end=\"12194\"><span class=\"ez-toc-section\" id=\"1_Melt_and_control_the_charge\"><\/span><span role=\"text\"><strong data-start=\"12160\" data-end=\"12194\">1. Melt and control the charge<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"12196\" data-end=\"12302\">Use appropriate charge materials and minimize unnecessary exposure of the melt to moisture and turbulence.<\/p>\n<h3 data-start=\"12304\" data-end=\"12343\"><span class=\"ez-toc-section\" id=\"2_Apply_furnace-side_treatment\"><\/span><span role=\"text\"><strong data-start=\"12308\" data-end=\"12343\">2. Apply furnace-side treatment<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"12345\" data-end=\"12451\">Flux treatment can help modify or remove certain oxide and dross contaminants before downstream treatment.<\/p>\n<h3 data-start=\"12453\" data-end=\"12488\"><span class=\"ez-toc-section\" id=\"3_Perform_rotary_degassing\"><\/span><span role=\"text\"><strong data-start=\"12457\" data-end=\"12488\">3. Perform rotary degassing<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"12490\" data-end=\"12604\">Use an appropriately designed rotary degassing system to reduce dissolved hydrogen and assist inclusion flotation.<\/p>\n<h3 data-start=\"12606\" data-end=\"12658\"><span class=\"ez-toc-section\" id=\"4_Allow_separation_and_remove_surface_dross\"><\/span><span role=\"text\"><strong data-start=\"12610\" data-end=\"12658\">4. Allow separation and remove surface dross<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"12660\" data-end=\"12754\">Give floated contaminants an opportunity to separate before skimming where the process allows.<\/p>\n<h3 data-start=\"12756\" data-end=\"12793\"><span class=\"ez-toc-section\" id=\"5_Filter_the_molten_aluminum\"><\/span><span role=\"text\"><strong data-start=\"12760\" data-end=\"12793\">5. Filter the molten aluminum<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"12795\" data-end=\"12929\">Use a ceramic foam filter, deep-bed filter, or another suitable filtration system according to the required cleanliness and flow rate.<\/p>\n<h3 data-start=\"12931\" data-end=\"12974\"><span class=\"ez-toc-section\" id=\"6_Protect_the_melt_during_transfer\"><\/span><span role=\"text\"><strong data-start=\"12935\" data-end=\"12974\">6. Protect the melt during transfer<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"12976\" data-end=\"13129\">Even a well-treated melt can become contaminated again through excessive turbulence, exposed transfer, dirty launders or unsuitable refractory materials.<\/p>\n<h3 data-start=\"13131\" data-end=\"13173\"><span class=\"ez-toc-section\" id=\"7_Cast_with_controlled_metal_flow\"><\/span><span role=\"text\"><strong data-start=\"13135\" data-end=\"13173\">7. Cast with controlled metal flow<\/strong><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"13175\" data-end=\"13315\">Maintaining stable flow and minimizing turbulence are essential because melt treatment cannot compensate for severe re-oxidation downstream.<\/p>\n<div id=\"attachment_9609\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-9609\" class=\"wp-image-9609 size-full\" src=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/09\/granulater-flux-used-in-molten-aluminum.webp\" alt=\"Flux treatment used in molten aluminum\" width=\"640\" height=\"480\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/09\/granulater-flux-used-in-molten-aluminum.webp 640w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/09\/granulater-flux-used-in-molten-aluminum-300x225.webp 300w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/09\/granulater-flux-used-in-molten-aluminum-16x12.webp 16w\" sizes=\"auto, (max-width: 640px) 100vw, 640px\" \/><p id=\"caption-attachment-9609\" class=\"wp-caption-text\"><em>Flux treatment used in molten aluminum<\/em><\/p><\/div>\n<h2 data-start=\"13322\" data-end=\"13378\"><span class=\"ez-toc-section\" id=\"How_Do_You_Choose_the_Right_Purification_Combination\"><\/span>How Do You Choose the Right Purification Combination?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"13380\" data-end=\"13475\">Instead of asking <strong data-start=\"13398\" data-end=\"13442\">\u201cWhich purification method is the best?\u201d<\/strong>, ask four more useful questions:<\/p>\n<h3 data-start=\"13477\" data-end=\"13513\"><span class=\"ez-toc-section\" id=\"1_Is_hydrogen_the_main_problem\"><\/span>1. Is hydrogen the main problem?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"13515\" data-end=\"13618\">If the primary defect is gas porosity or elevated hydrogen, prioritize <strong data-start=\"13586\" data-end=\"13617\">rotary or in-line degassing<\/strong>.<\/p>\n<h3 data-start=\"13620\" data-end=\"13665\"><span class=\"ez-toc-section\" id=\"2_Are_oxide_inclusions_the_main_problem\"><\/span>2. Are oxide inclusions the main problem?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"13667\" data-end=\"13811\">If inclusion content is high, filtration becomes more important. A properly selected <strong data-start=\"13752\" data-end=\"13794\">ceramic foam filter or deep-bed filter<\/strong> may be required.<\/p>\n<h3 data-start=\"13813\" data-end=\"13864\"><span class=\"ez-toc-section\" id=\"3_Is_the_melt_coming_from_a_high-scrap_charge\"><\/span>3. Is the melt coming from a high-scrap charge?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"13866\" data-end=\"13999\">If yes, upstream flux treatment, settling, skimming and staged filtration may be more important than simply selecting a finer filter.<\/p>\n<h3 data-start=\"14001\" data-end=\"14045\"><span class=\"ez-toc-section\" id=\"4_What_is_the_required_casting_quality\"><\/span>4. What is the required casting quality?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p data-start=\"14047\" data-end=\"14144\">A general foundry casting and aerospace-grade billet do not require the same purification system.<\/p>\n<p data-start=\"14146\" data-end=\"14324\">The higher the quality requirement and production volume, the more important it becomes to control the entire melt treatment chain rather than relying on one purification device.<\/p>\n<h2 data-start=\"14331\" data-end=\"14400\"><span class=\"ez-toc-section\" id=\"What_Is_the_Best_Combination_for_Molten_Aluminum_Purification\"><\/span>What Is the Best Combination for Molten Aluminum Purification?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p data-start=\"14402\" data-end=\"14467\">For many aluminum casting operations, a strong starting point is:<\/p>\n<blockquote data-start=\"14469\" data-end=\"14537\">\n<p data-start=\"14471\" data-end=\"14537\"><strong data-start=\"14471\" data-end=\"14537\">Furnace treatment + rotary degassing + ceramic foam filtration<\/strong><\/p>\n<\/blockquote>\n<p data-start=\"14539\" data-end=\"14602\">For more demanding applications, the system may be expanded to:<\/p>\n<blockquote data-start=\"14604\" data-end=\"14736\">\n<p data-start=\"14606\" data-end=\"14736\"><strong data-start=\"14606\" data-end=\"14736\">Flux treatment + in-line rotary degassing + settling\/skimming + deep-bed or ceramic foam filtration + controlled melt transfer<\/strong><\/p>\n<\/blockquote>\n<p data-start=\"14738\" data-end=\"14808\">The key is that <strong data-start=\"14754\" data-end=\"14807\">each treatment step performs a different function<\/strong>.<\/p>\n<p data-start=\"14810\" data-end=\"15186\">Rotary degassing is primarily used to control dissolved hydrogen. Ceramic foam filtration is primarily used to remove non-metallic inclusions. Deep-bed filtration provides a higher-capacity solution for demanding continuous casting applications, while furnace treatment helps reduce the contaminant load before the final filtration stage.<\/p>\n<p data-start=\"15188\" data-end=\"15446\">Therefore, the \u201cbest\u201d molten aluminum purification system is not necessarily the system with the most treatment stages or the finest filter. It is the system that <strong data-start=\"15351\" data-end=\"15445\">matches the alloy, melt quality, casting process, flow rate and final product requirements<\/strong>.<\/p>\n<p data-start=\"15448\" data-end=\"15508\">For most operations, the most important principle is simple:<\/p>\n<p data-start=\"15510\" data-end=\"15650\"><strong data-start=\"15510\" data-end=\"15650\">Remove hydrogen with degassing, remove inclusions with filtration, and prevent the melt from becoming contaminated again before casting.<\/strong><\/p>\n<h2 data-start=\"15510\" data-end=\"15650\"><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>\u0427\u0430\u0441\u0442\u043e \u0437\u0430\u0434\u0430\u0432\u0430\u0435\u043c\u044b\u0435 \u0432\u043e\u043f\u0440\u043e\u0441\u044b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<details>\n<summary>1. What is the best combination for molten aluminum purification?<\/summary>\n<p>For many aluminum casting operations, a combination of <strong data-start=\"281\" data-end=\"352\">furnace treatment, rotary degassing, and molten aluminum filtration<\/strong> is a practical choice. The exact combination depends on the alloy, melt quality, casting process, flow rate, and required metal cleanliness.<\/p>\n<\/details>\n<details>\n<summary>2. Why combine degassing and filtration for molten aluminum?<\/summary>\n<p>The two processes target different contaminants. <strong data-start=\"611\" data-end=\"661\">Degassing primarily removes dissolved hydrogen<\/strong>, while filtration removes non-metallic inclusions such as oxide films and refractory particles. Using both provides more comprehensive melt treatment.<\/p>\n<\/details>\n<details>\n<summary>3. Does ceramic foam filtration remove hydrogen from molten aluminum?<\/summary>\n<p>No. Ceramic foam filters are primarily designed to remove <strong data-start=\"948\" data-end=\"981\">solid non-metallic inclusions<\/strong>. When hydrogen removal is required, a rotary or in-line degassing process is normally used.<\/p>\n<\/details>\n<details>\n<summary>4. What does rotary degassing remove from molten aluminum?<\/summary>\n<p>Rotary degassing is mainly used to reduce <strong data-start=\"1182\" data-end=\"1204\">dissolved hydrogen<\/strong> in molten aluminum. It can also promote the flotation of some inclusions, but it should not be considered a replacement for a dedicated filtration system.<\/p>\n<\/details>\n<details>\n<summary>5. Should molten aluminum be degassed before filtration?<\/summary>\n<p>In many casting systems, <strong data-start=\"1449\" data-end=\"1504\">degassing is performed upstream of final filtration<\/strong>. This allows the filtration stage to capture residual inclusions after the melt has undergone degassing and other upstream treatments.<\/p>\n<\/details>\n<details>\n<summary>6. Is a ceramic foam filter enough to purify molten aluminum?<\/summary>\n<p>Not always. A ceramic foam filter can effectively reduce non-metallic inclusions, but it does not address every melt-quality problem. If dissolved hydrogen is high, degassing may also be required; heavily contaminated or high-quality melts may require additional treatment.<\/p>\n<\/details>\n<details>\n<summary>7. Is a higher PPI ceramic foam filter always better?<\/summary>\n<p>No. A higher PPI can improve the capture of finer inclusions, but it may also increase flow resistance. Filter PPI should be selected together with <strong data-start=\"2192\" data-end=\"2276\">filter area, molten aluminum flow rate, inclusion load, and required cleanliness<\/strong>.<\/p>\n<\/details>\n<details>\n<summary>8. When should deep-bed filtration be used instead of a ceramic foam filter?<\/summary>\n<p>Deep-bed filtration is generally more suitable for <strong data-start=\"2413\" data-end=\"2501\">high-volume continuous casting and applications requiring very high melt cleanliness<\/strong>. Ceramic foam filters are often more practical for flexible or lower-throughput filtration applications.<\/p>\n<\/details>\n<details>\n<summary>9. What is the typical molten aluminum purification process?<\/summary>\n<p>A typical process may include <strong data-start=\"2705\" data-end=\"2817\">melting, furnace treatment, flux treatment, rotary degassing, settling and skimming, filtration, and casting<\/strong>. Not every operation requires every step, so the process should be adjusted to the alloy and casting requirements.<\/p>\n<\/details>\n<details>\n<summary>10. How do I choose the right molten aluminum purification system?<\/summary>\n<p>Start with the main melt-quality problems, such as <strong data-start=\"3058\" data-end=\"3108\">hydrogen, oxide inclusions, or excessive dross<\/strong>. Then consider the alloy, casting method, melt flow rate, production volume, and required final quality to determine whether you need degassing, ceramic foam filtration, deep-bed filtration, or a combination of these methods.<\/p>\n<\/details>","protected":false},"excerpt":{"rendered":"<p>Molten aluminum purification is not a single-step process. No single treatment method can efficiently remove dissolved hydrogen, oxide films, and solid non-metallic inclusions at the same time. For most aluminum casting operations, a combination of furnace treatment, rotary degassing, and molten aluminum filtration provides a practical way to improve melt cleanliness and casting quality. A [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-9631","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Best Combination for Molten Aluminum Purification<\/title>\n<meta name=\"description\" content=\"Compare common molten aluminum purification methods and see when to use degassing, ceramic foam filters, flux treatment, or deep-bed filtration.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ru\/what-is-the-best-combination-for-molten-aluminum-purification\/\" \/>\n<meta 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