{"id":4083,"date":"2020-11-07T01:47:29","date_gmt":"2020-11-07T01:47:29","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=4083"},"modified":"2020-11-07T01:47:29","modified_gmt":"2020-11-07T01:47:29","slug":"online-degassing-aluminum","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/online-degassing-aluminum\/","title":{"rendered":"Penghilangan Gas pada Aluminium Secara Online"},"content":{"rendered":"

Saat ini, proses degassing online pada aluminium cair telah banyak digunakan untuk pemurnian aluminium cair. Peralatan degassing online yang diproduksi oleh Adtech dipasang di antara tungku dan mesin pengecoran untuk menghilangkan hidrogen dan residu lainnya dalam aluminium cair serta paduannya, yang memengaruhi kualitas dan sifat mekanisnya. Efisiensi degassing rata-rata mencapai 60%.<\/p>\n

\"Penghilangan<\/p>\n

Agar proses degassing aluminium secara daring dapat berjalan secara efisien, hal-hal berikut ini perlu diperhatikan:<\/p>\n

Perangkat degassing harus memiliki kedap udara yang baik, tidak terlalu terpengaruh oleh kondisi cuaca, menghasilkan lebih sedikit terak, dan tidak menimbulkan polusi sekunder. Apabila kotak degassing tidak tertutup rapat, uap air di udara akan dengan mudah masuk ke dalam tungku dan menyebabkan penyerapan hidrogen. Unit degassing pada masa awal umumnya menggunakan nitrogen berkemurnian tinggi sebagai gas penutup untuk mengurangi penyerapan hidrogen, namun hal ini juga tetap terpengaruh oleh kondisi cuaca hingga batas tertentu. Oleh karena itu, guna meningkatkan efisiensi degassing dan mengurangi dampak kondisi cuaca, peralatan degassing diharuskan memiliki kinerja penyegelan yang baik.<\/p>\n

Gelembung-gelembung di dalam tangki degassing harus tersebar secara merata dan tingkat cairan tidak boleh turun secara signifikan. Apabila laju aliran total dan tekanan gas proses di dalam degasser tetap konstan, semakin banyak jumlah gelembung, semakin luas pula luas permukaan kontak antara gas proses dan cairan lelehan. Oleh karena itu, semakin kecil ukuran gelembung (yang setara dengan semakin banyaknya gelembung), semakin banyak gelembung yang terbentuk. Semakin luas luas permukaan kontak, semakin baik difusi hidrogen ke dalam gas proses, dan tujuan penghilangan hidrogen dapat tercapai. Rotor harus memiliki daya pengadukan yang memadai sehingga gelembung dapat bergerak dengan kecepatan yang cukup untuk mendispersikan seluruh cairan logam, namun kecepatan rotor yang berlebihan akan menyebabkan permukaan cairan bergulung dan dapat menyebabkan terak masuk kembali ke dalam cairan logam.<\/p>\n

Struktur rotor dari unit penghilang gas<\/a> Harus memiliki kapasitas pengadukan yang memadai. Batang rotor dan impeler rotor harus memiliki struktur yang memadai. Diameter impeler sebaiknya diperbesar dan disesuaikan dengan kecepatan yang tepat guna meningkatkan gaya pengadukan rotor.<\/p>\n

Gas proses harus memiliki kemurnian tinggi, dan tidak boleh terjadi pembentukan terak maupun penyerapan hidrogen dari cairan logam. Secara umum, pengendalian kemurnian gas proses mencakup dua aspek utama: pertama, pengendalian sumber gas; kedua, pengendalian kebocoran pada seluruh pipa dan instrumen yang dilalui gas tersebut. Secara umum, kemurnian sumber gas yang diolah harus mencapai 99,999%, kadar air harus kurang dari 4 \u00d7 10\u207b\u2076, dan kadar oksigen harus kurang dari 5 \u00d7 10\u207b\u2076. Kadar air dan oksigen yang berlebihan dalam gas proses dapat menyebabkan pembentukan terak dan penyerapan hidrogen.<\/p>\n

Untuk memastikan bahwa logam cair memiliki waktu tinggal yang cukup di dalam perangkat degassing, diperlukan sejumlah tertentu kolam logam cair. Rotor unit degassing harus dicelupkan hingga kedalaman tertentu. Kedalaman pencelupan rotor berhubungan langsung dengan apakah seluruh kolam lelehan dapat sepenuhnya tertutupi oleh gas proses, yang memiliki pengaruh yang lebih jelas terhadap efisiensi degassing. Secara umum, kedalaman pencelupan rotor dan impeler harus lebih dari 500 mm, dan jarak antara impeler dengan dasar kolam lelehan harus 50\u2013100 mm.<\/p>","protected":false},"excerpt":{"rendered":"

At present, online degassing of molten aluminum is widely used for molten aluminum purification. The on-line degassing equipment produced by Adtech is installed between the furnace and the casting machine to eliminate hydrogen and other residues in molten aluminum and its alloys, which affect their quality and mechanical properties. The average degassing efficiency was 60%. […]<\/p>\n","protected":false},"author":1,"featured_media":4084,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-4083","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nOnline Degassing Aluminum by AdTech Rotary Degassing Unit<\/title>\n<meta name=\"description\" content=\"Online degassing of molten aluminum is widely used for molten aluminum purification. 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