{"id":4853,"date":"2020-12-21T08:34:35","date_gmt":"2020-12-21T08:34:35","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=4853"},"modified":"2020-12-21T08:34:35","modified_gmt":"2020-12-21T08:34:35","slug":"metals-degassing","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/metals-degassing\/","title":{"rendered":"Penghilangan Gas dari Logam"},"content":{"rendered":"<p>Proses penghilangan gas pada logam digunakan untuk mengolah logam cair guna menghilangkan inklusi yang tidak diinginkan secara efektif, seperti gas, logam alkali, dan partikel padat yang terperangkap.<\/p>\n<p>Ketika banyak logam cair digunakan dalam proses pengecoran dan proses serupa, logam-logam tersebut harus diolah terlebih dahulu untuk menghilangkan komponen berbahaya yang dapat berdampak negatif terhadap sifat fisik atau kimia produk cor yang dihasilkan. Sebagai contoh, aluminium cair dan paduan aluminium dari tangki reduksi alumina atau tungku penampung logam biasanya mengandung hidrogen terlarut, inklusi non-logam padat (karbida aluminium), dan berbagai unsur reaktif (seperti logam alkali dan logam alkali tanah). Saat logam mendingin, hidrogen terlarut keluar dari larutan dan membentuk pori-pori berbahaya pada produk. Inklusi padat non-logam dapat mengurangi kemurnian logam, sedangkan unsur-unsur reaktif dan inklusi dapat menghasilkan sifat logam yang berbahaya.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4854\" src=\"https:\/\/aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/12\/Metals-Degassing.jpg\" alt=\"Penghilangan Gas dari Logam\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/12\/Metals-Degassing.jpg 500w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/12\/Metals-Degassing-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Komponen-komponen yang tidak diinginkan ini biasanya dihilangkan dari logam cair dengan memasukkan gas ke bawah permukaan logam menggunakan injektor gas. Saat gelembung-gelembung yang terbentuk naik melalui massa logam cair, gelembung-gelembung tersebut menyerap gas yang terlarut dalam logam dan mengeluarkannya dari logam cair. Selain itu, partikel padat non-logam terdorong ke permukaan oleh efek flotasi gelembung dan dapat disaring. Jika gas yang digunakan untuk tujuan ini bereaksi dengan pengotor logam yang terkandung di dalamnya, unsur tersebut dapat diubah menjadi senyawa melalui reaksi kimia dan dihilangkan dari logam cair dengan cara yang sama seperti padatan yang terkandung di dalamnya atau melalui pemisahan cair-cair.<\/p>\n<p>Proses ini biasanya disebut \u201cpenghilangan gas pada logam\u201d, dan dapat digunakan tidak hanya untuk menghilangkan gas dari logam tetapi juga untuk menghilangkan inklusi. Proses ini biasanya dilakukan dengan salah satu dari dua cara: di dalam tungku, biasanya digunakan satu atau lebih pipa injeksi gas statis; atau secara seri, dengan mengalirkan logam melalui kotak di dalam tangki yang biasanya ditempatkan di antara tungku penahan dan mesin pengecoran. Di pipa knalpot, dapat digunakan injektor gas yang lebih efektif. Pada kasus pertama, proses ini tidak efisien dan memakan waktu karena dihasilkan banyak gelembung, yang dapat menyebabkan kontak gas\/logam yang buruk, agitasi logam yang buruk, serta turbulensi permukaan dan percikan yang tinggi. Turbulensi permukaan yang dihasilkan dapat menyebabkan pembentukan abu dan kehilangan logam, sedangkan pengadukan logam yang buruk dapat mengakibatkan adanya logam yang tidak terolah sepenuhnya. Metode kedua lebih efektif dalam memasukkan dan memanfaatkan gas. Salah satu alasannya adalah bahwa metode online merupakan proses kontinu, bukan proses batch.<\/p>\n<p>Agar proses online dapat berjalan secara efektif, gelembung-gelembung tersebut harus bersentuhan dengan cairan leleh selama jangka waktu yang tepat, yang dicapai dengan menyuntikkan gas inert. Misalnya, gas tersebut terpecah menjadi gelembung-gelembung yang lebih kecil, dan gelembung-gelembung yang lebih kecil tersebut oleh <a href=\"https:\/\/www.aluminiumceramicfiber.com\/id\/rotary-degasser\/\">penghilang gas berputar<\/a>, yang tersebar lebih efektif berkat volume logam tersebut. Efektivitas biasanya diukur berdasarkan reaksi pelepasan hidrogen pada aluminium, dan reaksi yang memadai umumnya dianggap mampu menghilangkan setidaknya 50% hidrogen (biasanya 50% hingga 60%).<\/p>","protected":false},"excerpt":{"rendered":"<p>Metals degassing is used to treat molten metal to effectively remove undesirable inclusions such as gases, alkali metals, and entrained solids. When many molten metals are used in casting and similar processes, they must be initially treated to remove harmful components that may adversely affect the physical or chemical properties of the resulting cast product. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4854,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-4853","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Metals Degassing by Rotary Degassing Unit | AdTech China<\/title>\n<meta name=\"description\" content=\"Metals degassing is used to treat molten metal to effectively remove undesirable inclusions: gases, alkali metals, and entrained solids.\" \/>\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\/id\/metals-degassing\/\" \/>\n<meta property=\"og:locale\" content=\"id_ID\" 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