{"id":6638,"date":"2021-08-05T09:50:08","date_gmt":"2021-08-05T09:50:08","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=6638"},"modified":"2021-08-05T09:50:08","modified_gmt":"2021-08-05T09:50:08","slug":"online-rotary-degassing","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/online-rotary-degassing\/","title":{"rendered":"Penghilangan Gas Rotari Secara Online"},"content":{"rendered":"

Proses penghilangan gas secara rotari daring merupakan hal yang diperlukan dalam seluruh proses produksi logam cair.<\/p>\n

Pada suhu peleburan aluminium (700\u00b0C ke atas), uap air terurai menjadi hidrogen dan oksigen. Oksigen bereaksi dengan cairan aluminium untuk membentuk alumina, sedangkan hidrogen (H) terurai menjadi atom hidrogen (H) dan larut ke dalam cairan aluminium. Oleh karena itu, pelarutan hidrogen dalam aluminium cair tidak dapat dihindari, dan seberapa banyak hidrogen yang terlarut bergantung pada kelembapan udara. Kemudian, karena kelarutan hidrogen dalam aluminium cair jauh lebih besar daripada dalam aluminium padat, pori-pori akan terbentuk di batas butir kristal selama penurunan tajam suhu pemadatan hidrogen yang terlarut. Por-pori dalam logam dapat merusak kekuatan logam tersebut. Untuk meningkatkan kekuatan logam, perlu dipertimbangkan untuk menghilangkan sebagian besar gas saat logam masih dalam keadaan cair.<\/p>\n

\"Penghilangan<\/p>\n

Yang metode penghilangan gas secara rotari<\/a> menggunakan impeler berputar berkecepatan tinggi untuk mengubah gas yang telah dimurnikan menjadi gelembung-gelembung kecil yang tersebar merata. Gelembung-gelembung gas kecil ini perlahan naik ke permukaan cairan, sehingga memperpanjang waktu reaksi.<\/p>\n

Laju degassing yang lebih cepat dapat dicapai melalui teknologi degassing berputar secara online. Poros grafit dan kepala impeler direndam dalam kolam cairan, dan gelembung-gelembung besar dipecah menjadi gelembung-gelembung kecil yang seragam.<\/p>\n

Pengecilan ukuran gelembung gas yang telah dimurnikan secara signifikan meningkatkan luas permukaan dan waktu tinggal gas tersebut. Efek pengadukan yang dihasilkan oleh kepala impeler membuat gas yang telah dimurnikan tersebar lebih merata, sehingga gas tersebut dapat bersentuhan sepenuhnya dengan hidrogen dalam cairan aluminium, yang bermanfaat untuk menghilangkan hidrogen.<\/p>\n

Meskipun metode degassing rotari daring efektif dalam meningkatkan efisiensi penghilangan hidrogen, sulit untuk menentukan perannya dalam menghilangkan oksida. Berbagai penelitian menunjukkan bahwa gelembung-gelembung kecil argon atau nitrogen yang dihasilkan dalam metode degassing rotari dapat membuat oksida mengapung ke permukaan cairan.<\/p>\n

Jika sejumlah kecil klorin ditambahkan ke dalam gas yang telah dimurnikan, efisiensi penghilangan oksida dapat ditingkatkan. Karena klorin dapat mengubah tegangan permukaan aluminium cair, hal ini memudahkan oksida untuk menempel pada gelembung-gelembung gas yang telah dimurnikan.<\/p>\n

Metode degassing rotasi dapat meningkatkan jumlah terak di permukaan aluminium cair, yang sebagian disebabkan oleh inklusi dan partikel non-logam dalam aluminium cair yang mengapung ke permukaan.<\/p>","protected":false},"excerpt":{"rendered":"

Online rotary degassing is necessary for all molten metal production. At the aluminum melting temperature (700\u00b0C and above), water vapor decomposes into hydrogen and oxygen. Oxygen reacts with the aluminum liquid to form alumina, and the hydrogen (H) decomposes into hydrogen atoms (H) and dissolves into the aluminum liquid. Therefore, it is inevitable to dissolve […]<\/p>\n","protected":false},"author":1,"featured_media":6639,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-6638","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nOnline Rotary Degassing for Molten Aluminum Purification<\/title>\n<meta name=\"description\" content=\"Online rotary degassing is necessary for all molten metal production. 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