{"id":8542,"date":"2022-01-20T05:52:00","date_gmt":"2022-01-20T05:52:00","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=8542"},"modified":"2022-01-20T05:52:50","modified_gmt":"2022-01-20T05:52:50","slug":"secondary-aluminum-refining","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/secondary-aluminum-refining\/","title":{"rendered":"Pemurnian Aluminium Sekunder"},"content":{"rendered":"

Proses pemurnian aluminium sekunder (perlakuan pemurnian) harus dilakukan untuk menghilangkan inklusi dan gas.<\/p>\n

Lelehan aluminium sekunder mengandung inklusi dan gas, yang memengaruhi kualitas coran (ingot) serta menimbulkan kendala pada proses selanjutnya (termasuk peleburan ulang dan pemrosesan bertekanan). Oleh karena itu,<\/p>\n

Agar paduan aluminium sekunder memiliki sifat yang sama atau serupa dengan paduan yang dibuat dari aluminium asli, proses pemurnian dilakukan dengan cara yang sama seperti pada paduan yang dibuat dari aluminium asli.<\/p>\n

\"Pemurnian<\/p>\n

Meskipun aluminium bekas telah disortir dan diolah terlebih dahulu, tetap sulit untuk menghindari kandungan pengotor yang melebihi standar. Harus berusaha menghilangkan zat-zat berbahaya tersebut; jika tidak, bahan-bahan tersebut perlu ditambahkan atau diencerkan.<\/p>\n

Ada dua jenis pengotor dalam aluminium primer: yang pertama adalah pengotor logam dan yang kedua adalah pengotor non-logam. Pengotor logam meliputi besi, silikon, tembaga, natrium, titanium, vanadium, mangan, kromium, dan magnesium; di antaranya, besi, silikon, dan tembaga merupakan pengotor logam utama. Pengotor non-logam meliputi aluminium oksida, garam fluorida, residu karbon, karbonisasi aluminium, aluminium nitrida, dan lain-lain; selain itu, terdapat hidrogen, karbon dioksida, karbon monoksida, dan lain-lain yang berada dalam bentuk gas. Pengotor non-logam ini terutama terdiri dari alumina dan hidrogen.<\/p>\n

Kadar hidrogen jenuh dalam aluminium cair meningkat seiring dengan kenaikan suhu, misalnya 0,67 mL\/100 gAl pada 660 \u00b0C dan 1,237 mL\/100 gAl pada 750 \u00b0C. Kandungan hidrogen yang tinggi tidak baik untuk produksi pelanggan hilir. . Pengotor non-logam ini tidak memberikan manfaat apa pun bagi aluminium, memengaruhi sifat mekanis produk, dan menjadi sasaran pemurnian.<\/p>\n

Tujuan pemurnian aluminium primer adalah untuk menghilangkan berbagai kotoran non-logam dalam aluminium cair dan memperoleh aluminium cair yang relatif bersih sebagai bahan batangan.<\/p>\n

Metode pemurnian aluminium primer terutama meliputi metode pendinginan dan penghilangan gas, metode pengadukan dan penghilangan gas dengan diam serta penghilangan terak, metode pemadatan-peleburan ulang, metode pemurnian dengan campuran gas nitrogen-klorin, metode pemurnian dengan fluks, metode pemurnian gabungan filtrasi dan peniupan udara, filtrasi dengan kain kaca, dan sebagainya.<\/p>\n

Karena persyaratan pemurnian tidak terlalu ketat dalam produksi ingot aluminium untuk peleburan ulang, maka metode pemurnian fluks<\/a> saat ini banyak digunakan dalam produksi dalam negeri.<\/p>\n

Setelah aluminium cair dimasukkan sepenuhnya ke dalam tungku, penambah penghilang terak aluminium cair ditambahkan sesuai proporsi. Fungsi penambah penghilang terak ini adalah untuk mengubah sifat basah terak dan aluminium, meningkatkan tegangan permukaan pada antarmuka terak dan aluminium, serta mempersulit aluminium untuk membasahi terak. Dalam proses pengadukan, aluminium cair dan terak terpisah secara efektif, dan terak berubah menjadi terak bubuk kering, yang dapat melarutkan alumina dalam aluminium cair ke dalamnya, atau menyerapnya pada permukaannya untuk mencapai tujuan penghilangan terak. .<\/p>\n

Metode penambahan ini umumnya menyebarkan pelarut secara merata di permukaan aluminium cair, kemudian menggunakan alat pengikis terak untuk mengaduk secara menyeluruh, sehingga pelarut dan aluminium cair dapat bersentuhan dengan baik dan bereaksi. Selama proses pengadukan, sebagian gas di dalam aluminium cair juga dapat terlepas. Setelah mengikis terak aluminium yang terbentuk, diamkan selama sekitar 30 menit agar gas di dalam aluminium cair terlepas sepenuhnya, dan kemudian proses pengecoran dapat dimulai.<\/p>","protected":false},"excerpt":{"rendered":"

Secondary aluminum refining (purification treatment) must be carried out to remove inclusions and gases. The secondary aluminum melt contains inclusions and gases, which affect the quality of castings (ingots) and bring difficulties to subsequent processing (including remelting and pressure processing). Therefore, In order to make the secondary aluminum alloy the same as or similar to […]<\/p>\n","protected":false},"author":1,"featured_media":8546,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[24377,24376],"class_list":["post-8542","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-flux-purification-method","tag-secondary-aluminum-refining"],"yoast_head":"\nSecondary Aluminum Refining, Flux Purification Method<\/title>\n<meta name=\"description\" content=\"Secondary aluminum refining (purification treatment) must be carried out to remove inclusions and gases and obtain relatively clean aluminum.\" \/>\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\/secondary-aluminum-refining\/\" 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