{"id":1620,"date":"2020-07-08T09:56:55","date_gmt":"2020-07-08T09:56:55","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=1620"},"modified":"2020-11-04T03:28:18","modified_gmt":"2020-11-04T03:28:18","slug":"aluminum-oxide-refining","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/ar\/aluminum-oxide-refining\/","title":{"rendered":"\u062a\u0643\u0631\u064a\u0631 \u0623\u0643\u0633\u064a\u062f \u0627\u0644\u0623\u0644\u0648\u0645\u0646\u064a\u0648\u0645"},"content":{"rendered":"<div id=\"pagewrapper\" class=\"clearfix\">\n<div class=\"region region-content\">\n<div id=\"block-system-main\" class=\"block block-system\">\n<div class=\"content\">\n<div data-quickedit-entity-id=\"node\/125\">\n<div class=\"panel-responsive clearfix\">\n<div class=\"layout-responsive-region layout-responsive-region-body rld-col rld-span-smartphone_first rld-span-smartphone_3 rld-span-tablet_first rld-span-tablet_6 rld-span-standard_5\">\n<div class=\"panel-pane pane-entity-field pane-node-body\">\n<div class=\"pane-content\">\n<div class=\"field field-name-body field-type-text-with-summary field-label-hidden\">\n<div class=\"field-items\">\n<div class=\"field-item even\">\n<p>Alumina is properly called aluminum oxide, which is a chemical compound comprised of aluminum and oxygen molecules (Al<sub>2<\/sub>O<sub>3<\/sub>). After aluminum oxide refining from bauxite, alumina generally looks like a white powder similar to table salt or granular sugar. Aluminum oxide is typically referred to as alumina, but may also be called aloxide, aloxite or alundum, depending on the industry and the metal\u2019s use.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 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\">\u062c\u062f\u0648\u0644 \u0627\u0644\u0645\u062d\u062a\u0648\u064a\u0627\u062a<\/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;\">\u062a\u0628\u062f\u064a\u0644<\/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\/ar\/aluminum-oxide-refining\/#Aluminum_Oxide_Refining\" >\u062a\u0643\u0631\u064a\u0631 \u0623\u0643\u0633\u064a\u062f \u0627\u0644\u0623\u0644\u0648\u0645\u0646\u064a\u0648\u0645<\/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\/ar\/aluminum-oxide-refining\/#Alumina_Products\" >Alumina Products<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Aluminum_Oxide_Refining\"><\/span>\u062a\u0643\u0631\u064a\u0631 \u0623\u0643\u0633\u064a\u062f \u0627\u0644\u0623\u0644\u0648\u0645\u0646\u064a\u0648\u0645<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The Bayer process is carried out in four steps. First, after the bauxite is crushed, washed, and dried, it is dissolved with caustic soda at high temperatures. Next, the mixture is filtered to remove the impurities, called \u201cred mud,\u201d which is properly discarded. The remaining alumina solution is transferred to tall tanks called precipitators. In the precipitator tank, the hot solution starts to cool and aluminum hydroxide seeds, very small particles, are added. The aluminum hydroxide seeds stimulate the precipitation of solid aluminum hydroxide crystals. The aluminum hydroxide settles at the bottom of the tank and is removed. Finally, the aluminum hydroxide is washed of any remaining caustic soda and heated to remove excess water. After this process, alumina (aluminum oxide) emerges as a fine white powder. It looks much like sugar used in baking, but is hard enough to scratch a pane of glass.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3972\" src=\"https:\/\/aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/07\/Aluminum-Oxide-Refining.jpg\" alt=\"\u062a\u0643\u0631\u064a\u0631 \u0623\u0643\u0633\u064a\u062f \u0627\u0644\u0623\u0644\u0648\u0645\u0646\u064a\u0648\u0645\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/07\/Aluminum-Oxide-Refining.jpg 500w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/07\/Aluminum-Oxide-Refining-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p><strong>History of the Bayer Process<\/strong><\/p>\n<p>\u0627\u0644\u0640 <a href=\"https:\/\/www.aluminiumceramicfiber.com\/ar\/bayer-process-for-aluminum-extraction\/\">Bayer process<\/a> was invented in 1887 by Carl Josef Bayer. The Austrian chemist sought to develop a method for supplying alumina to the textile industry (for use as a mordant, a substance that combines with a dye and thereby sets the color in a material). The Bayer process gained importance in the aluminum production industry when combined with the Hall\u2013H\u00e9roult electrolytic process. With the two processes combined, bauxite ore can be processed into alumina, which is then converted into aluminum. Today, the Bayer process is virtually unchanged and is used to produce nearly all of the world\u2019s alumina supply, as an intermediate step in aluminum production.<\/p>\n<p><strong>Industrial Uses of Alumina<\/strong><\/p>\n<p>In addition to its use in the production of primary aluminum, aluminum oxide has other key industrial uses. Alumina is often used as a filler for plastics. The compound is also widely used as an abrasive and is a less-expensive substitute for industrial diamonds. Aluminum oxide flakes produce reflective effects within the paint used on automobiles. The largest scale use of alumina occurs in refineries, where the aluminum oxide compound is used to convert dangerous hydrogen sulfide waste gases into elemental sulfur.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Alumina_Products\"><\/span>Alumina Products<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Alumina that occurs in a natural, free form state is referred to as the mineral corundum. In special circumstances, corundum forms into sapphire and ruby gemstones. These gemstones can be produced synthetically and are occasionally referred to as alumina. This term is usually limited to the synthetic gemstones used in the metallurgy, ceramics and chemical processing industries. Naturally formed rubies and sapphires are two of the four precious gemstones, emeralds, and diamonds being the other two.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div class=\"layout-responsive-region layout-responsive-region-sidebar_b rld-col rld-span-smartphone_first rld-span-smartphone_3 rld-span-tablet_first rld-span-tablet_6 rld-span-standard_3\">\n<div class=\"panel-pane pane-entity-field pane-node-field-highlight-rightside-callou\">\n<div class=\"pane-content\">\n<div class=\"field field-name-field-highlight-rightside-callou field-type-node-reference field-label-hidden\">\n<div class=\"field-items\">\n<div class=\"field-item even\">\n<div id=\"node-306\" class=\"node node-aluminum-fact tan clearfix\">\n<p>Aluminum can be merged with special films to create flexible packaging. Increasingly, aluminum foil is being merged with flexible films to create lightweight, flexible packages. This technology allows the packaging to expand to the shape of its contents then contract as the product is consumed.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Alumina is properly called aluminum oxide, which is a chemical compound comprised of aluminum and oxygen molecules (Al2O3). After aluminum oxide refining from bauxite, alumina generally looks like a white powder similar to table salt or granular sugar. Aluminum oxide is typically referred to as alumina, but may also be called aloxide, aloxite or alundum, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3972,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[1312,1904,1903],"class_list":["post-1620","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-alumina-refining","tag-aluminum-oxide-refining","tag-bayer-process"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Aluminum Oxide Refining,Alumina Refining,Bayer Process<\/title>\n<meta name=\"description\" content=\"After aluminum oxide refining from bauxite, alumina generally looks like a white powder similar to table salt or granular sugar.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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