{"id":2452,"date":"2020-08-21T10:02:48","date_gmt":"2020-08-21T10:02:48","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=2452"},"modified":"2020-08-21T10:02:48","modified_gmt":"2020-08-21T10:02:48","slug":"impurity-elements-refining","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/id\/impurity-elements-refining\/","title":{"rendered":"Pemurnian Unsur-unsur Pengotor"},"content":{"rendered":"<p>Pemurnian unsur-unsur pengotor dalam aluminium cair adalah proses penghilangan besi dan unsur-unsur pengotor lainnya. Besi merupakan unsur pengotor utama dalam paduan aluminium. Pada paduan 6063, standar nasional menetapkan bahwa kandungan besi tidak boleh melebihi 0,35. Jika dalam produksi digunakan ingot aluminium industri kelas satu, kandungan besi umumnya dapat dikendalikan di bawah 0,25. Namun, jika untuk mengurangi biaya produksi digunakan aluminium daur ulang atau aluminium dari sumber lain dalam jumlah besar, kandungan besi akan dengan mudah melebihi standar tersebut. <a href=\"https:\/\/www.aluminiumceramicfiber.com\/id\/flux-refining-2\/\">Flux pemurnian<\/a> biasanya digunakan untuk pemurnian unsur-unsur pengotor.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-2453\" src=\"https:\/\/aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/08\/Impurity-Elements-Refining.jpg\" alt=\"Pemurnian Unsur-unsur Pengotor\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/08\/Impurity-Elements-Refining.jpg 500w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/08\/Impurity-Elements-Refining-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Ada dua bentuk Fe dalam aluminium, yaitu fase \u03b2 dengan struktur seperti jarum (Al9Fe2Si2), dan fase \u03b1 dengan struktur butiran (Al12Fe3Si). Struktur fase yang berbeda memiliki pengaruh yang berbeda pula terhadap paduan aluminium. Fase \u03b2 dengan struktur serpihan jauh lebih merusak dibandingkan fase \u03b1 dengan struktur butiran. Fase \u03b2 dapat membuat permukaan profil aluminium menjadi kasar, memengaruhi sifat mekanis, dan ketahanan korosi. Setelah permukaan profil berubah menjadi biru, kilapnya berkurang, dan warna murni tidak dapat diperoleh setelah proses pewarnaan, sehingga kandungan besi harus dikendalikan.<\/p>\n<p>Untuk mengurangi dampak berbahaya dari besi dan melakukan pemurnian unsur-unsur pengotor, langkah-langkah berikut dapat diambil:<\/p>\n<ul>\n<li>Semua alat yang digunakan untuk peleburan dan pengecoran dilapisi dengan cat yang dapat dibilas sebelum digunakan, yang dapat mengurangi pelarutan besi ke dalam aluminium cair.<\/li>\n<li>Sempurnakan butiran-butirannya, buat fase besi menjadi lebih halus dan lebih kecil, serta kurangi dampak merugikannya.<\/li>\n<li>Tambahkan strontium dalam jumlah yang tepat untuk mengubah fase \u03b2 menjadi fase \u03b1 dan mengurangi efek berbahayanya.<\/li>\n<li>Pemilihan bahan limbah yang cermat, sedapat mungkin untuk mengurangi masuknya kawat besi, paku, serbuk besi, dan puing-puing lainnya ke dalam tungku peleburan aluminium, yang dapat menyebabkan peningkatan kadar besi.<\/li>\n<\/ul>\n<p>Pengaruh Unsur-Unsur Pengotor Lainnya<\/p>\n<p>Unsur-unsur pengotor lainnya dalam ingot aluminium elektrolitik berada di bawah standar nasional, dan mungkin melebihi standar tersebut jika menggunakan limbah aluminium daur ulang. Dalam proses produksi, setiap unsur harus dikendalikan agar tidak melebihi standar, dan jumlah total unsur pengotor tidak boleh melebihi standar. Meskipun kandungan suatu unsur tunggal tidak melebihi standar, namun jika jumlah totalnya melebihi standar, unsur-unsur pengotor tersebut juga memiliki pengaruh yang besar terhadap kualitas. Praktik telah membuktikan bahwa ketika kandungan seng mencapai 0,05, bintik-bintik putih akan muncul pada permukaan profil setelah proses oksidasi, sehingga kandungan seng harus dikendalikan agar tetap di bawah 0,05.<\/p>","protected":false},"excerpt":{"rendered":"<p>Impurity elements refining in molten aluminum is removing iron and other impurity elements. Iron is the main impurity element in aluminum alloy. In the 6063 alloy, the national standard stipulates that it is not more than 0.35. If first-class industrial aluminum ingots are used in production, the iron content can generally be controlled below 0.25. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2453,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[7026],"class_list":["post-2452","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-impurity-elements-refining"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Impurity Elements Refining in Molten Aluminum Casting<\/title>\n<meta name=\"description\" content=\"Impurity elements refining in molten aluminum is removing iron and other impurity elements. 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