{"id":7140,"date":"2021-10-14T09:12:49","date_gmt":"2021-10-14T09:12:49","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=7140"},"modified":"2021-10-14T09:12:49","modified_gmt":"2021-10-14T09:12:49","slug":"molten-metal-degassing-refining","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/molten-metal-degassing-refining\/","title":{"rendered":"Penghilangan Gas dan Pemurnian Logam Cair"},"content":{"rendered":"

Berdasarkan mekanisme degassing yang berbeda-beda, metode pemurnian logam cair melalui degassing pada lelehan paduan aluminium dapat diklasifikasikan menjadi degassing dengan perbedaan tekanan parsial, degassing gabungan, degassing elektrolitik, dan sebagainya.<\/p>\n

\"Penghilangan<\/p>\n

Perbedaan tekanan parsial logam cair penghilangan gas dan pemurnian<\/a>\u00a0Metode ini dilakukan dengan menempatkan logam yang terlarut dalam gas ke dalam ruang hampa udara dengan tekanan parsial hidrogen yang rendah, atau dengan memasukkan gas inert ke dalam cairan logam untuk memberikan dorongan bagi proses dehidrogenasi. Dalam produksi industri, biasanya dilakukan dengan mengalirkan N\u2082, Ar, dan gas inert lainnya ke dalam cairan logam, atau dengan menekan fluks penghasil gas ke dalam cairan logam. Karena tidak ada hidrogen sama sekali di dalam gelembung, yaitu tekanan parsial hidrogen di dalamnya nol, sedangkan tekanan parsial hidrogen di cairan logam di sekitar gelembung lebih besar dari atau sama dengan nol. Di bawah pengaruh perbedaan tekanan parsial hidrogen antara bagian dalam dan luar gelembung, atom-atom hidrogen terlarut berdifusi ke antarmuka cairan-gelembung, di mana mereka bergabung kembali menjadi molekul hidrogen di dalam gelembung, dan kemudian molekul-molekul hidrogen tersebut naik bersama gelembung ke permukaan cairan dan keluar. Proses ini akan berlanjut hingga tekanan parsial hidrogen di dalam dan di luar gelembung menjadi sama.<\/p>\n

Metode pemurnian logam cair dengan penghilangan gas secara komposit dilakukan dengan menambahkan zat tertentu yang dapat membentuk hidrida dan nitrida dengan gas ke dalam fluks, seperti penambahan Li, Ca, Ti, Zn, dan logam aktif lainnya untuk membentuk LiH, CaH, TiN, ZnN, dan senyawa lainnya ke dalam logam cair untuk menghilangkan gas dari logam tersebut. Senyawa yang terbentuk ini memiliki kepadatan rendah dan sebagian besar tidak larut dalam logam cair, sehingga mudah dihilangkan melalui proses penghilangan terak dan pemurnian. Hidrogen dan oksigen yang terlarut dalam logam cair terkadang berinteraksi untuk membentuk uap air netral, yang juga dapat mencapai tujuan penghilangan gas.<\/p>\n

Metode pemurnian logam cair dengan penghilangan gas secara elektrolitik menggunakan sepasang elektroda yang dimasukkan ke dalam logam cair, dan permukaannya ditutupi dengan fluks penutup. Atau, logam cair itu sendiri digunakan sebagai salah satu elektroda, sedangkan elektroda lainnya dimasukkan ke dalam fluks, lalu arus searah dialirkan untuk proses elektrolisis. Di bawah pengaruh medan listrik, H dalam logam bergerak menuju anoda, menetralkan muatan, dan berpolimerisasi menjadi molekul hidrogen, lalu melarikan diri. Ion negatif lainnya dalam logam melepaskan muatan pada katoda, kemudian berkumpul dan mengapung ke atas serta tertahan di dalam fluks, dan bergabung menjadi terak yang akan dibuang. Praktik menunjukkan bahwa metode ini tidak hanya dapat menghilangkan gas, tetapi juga menghilangkan terak, dan dapat digunakan untuk pemurnian, penghilangan gas, dan penghilangan terak pada aluminium dan paduannya.<\/p>","protected":false},"excerpt":{"rendered":"

According to the different degassing mechanisms, the molten metal degassing refining method of aluminum alloy melt can be divided into partial pressure difference degassing, compound degassing, electrolytic degassing, etc. The partial pressure difference molten metal degassing refining\u00a0method is to place the gas-dissolved metal in a vacuum with a small hydrogen partial pressure, or to introduce […]<\/p>\n","protected":false},"author":1,"featured_media":7141,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-7140","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nMolten Metal Degassing Refining, Partial Pressure Difference Degassing<\/title>\n<meta name=\"description\" content=\"Molten metal degassing refining method can be divided into partial pressure difference degassing, compound degassing, 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