{"id":2936,"date":"2020-09-17T07:16:00","date_gmt":"2020-09-17T07:16:00","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=2936"},"modified":"2020-09-17T07:16:00","modified_gmt":"2020-09-17T07:16:00","slug":"metal-purification","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/metal-purification\/","title":{"rendered":"Pemurnian Logam"},"content":{"rendered":"<p>Proses pemurnian logam merupakan tahap yang sangat penting dalam proses produksi lembaran dan strip aluminium cor-gulung. Proses pemurnian aluminium cair tradisional umumnya dilakukan secara batch dalam tungku penampung, dan campuran gas nitrogen serta klorin beserta fluks biasanya digunakan untuk pemurnian. Proses pemurnian ini sebagian besar dijalankan secara manual. Laju pelepasan gas rendah, pemurnian tidak tuntas, aluminium cair akan terkontaminasi kembali selama proses pengangkutan dari tungku penampung ke mesin pengecoran, serta beban kerja pekerja tinggi, polusi parah, dan tungku berkapasitas besar sulit dioperasikan secara manual. Dengan munculnya produk-produk presisi tinggi seperti paduan aluminium berkualitas tinggi untuk penerbangan dan aluminium presisi \u201cdouble zero\u201d, persyaratan kualitas untuk ingot semakin tinggi. Proses pemurnian aluminium cair tradisional tidak lagi dapat menyesuaikan diri dengan produksi skala besar dan ingot berkualitas tinggi. Oleh karena itu, AdTech telah mengembangkan sistem pemurnian logam cair baru yang canggih di luar tungku. Artinya, lelehan aluminium dimurnikan dan disaring selama proses pengangkutan dari tungku penampung ke mesin pengecoran, sehingga dapat secara efisien menghilangkan kotoran yang larut maupun yang tidak larut.<\/p>\n<p>Selama proses pengecoran dan penggulungan strip aluminium, cairan paduan dapat melarutkan lebih banyak hidrogen selama proses peleburan dan penuangan paduan aluminium, dan kelarutan hidrogen menurun seiring dengan penurunan suhu cairan paduan. Saat berubah dari keadaan cair ke keadaan padat, kelarutan hidrogen dalam aluminium tiba-tiba menurun, sehingga selama proses pendinginan dan pemadatan cairan paduan, lebih banyak hidrogen yang mengendap membentuk gelembung hidrogen, dan tidak ada waktu bagi gelembung tersebut untuk naik ke permukaan dan keluar. Pada paduan yang telah mengeras, terbentuk pori-pori kecil yang tersebar, yang disebut \u201clubang jarum\u201d.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2937\" src=\"https:\/\/aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/09\/Metal-Purification-2.jpg\" alt=\"Pemurnian Logam\" width=\"400\" height=\"320\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/09\/Metal-Purification-2.jpg 400w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/09\/Metal-Purification-2-300x240.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>Selain itu, akan terdapat pori-pori reaktif dalam aluminium cair, yang terutama terdiri dari dua jenis: pori-pori yang terbentuk akibat interaksi antara aluminium cair dan inklusi, serta pori-pori yang terbentuk akibat interaksi antara komponen-komponen internal aluminium cair. Pada aluminium cair sebelum pengecoran, jika kandungan inklusi tinggi, atau inklusi teroksidasi disebabkan oleh rusaknya lapisan oksida pada permukaan aluminium cair, penumpukan hidrogen akan mengakibatkan pembentukan pori-pori.<\/p>\n<p>Berdasarkan pengamatan eksperimental, alumina dengan pori-pori halus dapat menyerap hidrogen dalam jumlah besar, sedangkan alumina dengan permukaan datar tidak menyerap hidrogen, yang menunjukkan bahwa penyerapan hidrogen oleh alumina bukanlah penyerapan kimia, melainkan penyerapan fisik. Semakin banyak inklusi dengan luas permukaan spesifik yang besar, dispersi yang kecil, dan aktivitas permukaan yang tinggi, semakin banyak hidrogen yang akan diserap. Sebaliknya, meskipun ukuran inklusi lebih besar dan kandungannya tinggi, kandungan hidrogen yang terserap belum tentu besar.<\/p>\n<p>Oleh karena itu, faktor utama yang memengaruhi pembentukan pori-pori pada aluminium adalah inklusi. Hanya dengan berfokus pada penghilangan dan pemurnianlah kualitas aluminium cair dapat dijamin. AdTech mengkhususkan diri dalam teknologi pemurnian logam, menyediakan layanan online <a href=\"https:\/\/www.aluminiumceramicfiber.com\/id\/portfolio\/degassing-unit\/\">unit penghilang gas<\/a>, <a href=\"https:\/\/www.aluminiumceramicfiber.com\/id\/cff-filtering-system\/\">Peralatan filter CFF<\/a>, serta bahan-bahan pemurnian metalurgi baru lainnya untuk industri pengecoran aluminium.<\/p>","protected":false},"excerpt":{"rendered":"<p>Metal purification treatment is a very important link in the production process of aluminum cast-rolled sheet and strip. The traditional aluminum liquid purification process is generally operated in batches in a holding furnace, and nitrogen and chlorine mixed gas and flux are generally used for refining. This purification process is mostly manually operated. The outgassing [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2938,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[7284],"class_list":["post-2936","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-metal-purification"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Metal Purification Technology for Aluminum Casting Industry<\/title>\n<meta name=\"description\" content=\"Metal purification treatment is a very important link in the production process of aluminum. 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