{"id":5076,"date":"2020-09-25T06:18:10","date_gmt":"2020-09-25T06:18:10","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5076"},"modified":"2020-09-25T06:18:10","modified_gmt":"2020-09-25T06:18:10","slug":"aluminum-refining-in-furnace","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/aluminum-refining-in-furnace\/","title":{"rendered":"Refinamento de alum\u00ednio em forno"},"content":{"rendered":"

No refino de alum\u00ednio em forno, h\u00e1 tr\u00eas m\u00e9todos comumente utilizados: o refino com g\u00e1s inerte, o refino com g\u00e1s misto (g\u00e1s inerte mais g\u00e1s cloro) e o refino por pulveriza\u00e7\u00e3o de p\u00f3. Outros m\u00e9todos incluem o refino com tijolos ventilados no forno ou o refino com rotor de grafite no forno. Devido a quest\u00f5es de efic\u00e1cia e custo, esses m\u00e9todos n\u00e3o s\u00e3o amplamente utilizados.<\/p>\n

A refina\u00e7\u00e3o com g\u00e1s misto de nitrog\u00eanio-cloro ou arg\u00f4nio-cloro ainda \u00e9 utilizada na refina\u00e7\u00e3o em forno em alguns processos nacionais de fundi\u00e7\u00e3o de ligas militares. No entanto, devido ao controle rigoroso sobre o uso do cloro, aos procedimentos complexos de utiliza\u00e7\u00e3o e \u00e0 presen\u00e7a de riscos de toxicidade e polui\u00e7\u00e3o, o uso generalizado da refina\u00e7\u00e3o com g\u00e1s misto \u00e9 restrito. A refina\u00e7\u00e3o por pulveriza\u00e7\u00e3o de p\u00f3 consiste na mistura de um agente de refina\u00e7\u00e3o granular com g\u00e1s inerte e, em seguida, na pulveriza\u00e7\u00e3o dessa mistura no alum\u00ednio fundido para realizar a refina\u00e7\u00e3o por fundente e, ao mesmo tempo, a refina\u00e7\u00e3o por g\u00e1s inerte. Atualmente, \u00e9 o m\u00e9todo de refina\u00e7\u00e3o em forno mais comumente utilizado no pa\u00eds e no exterior. Elimina o uso do agente de refina\u00e7\u00e3o em blocos tradicional.<\/p>\n

\"Refinamento<\/p>\n

O agente refinador<\/a> Al\u00e9m disso, introduz vapor de \u00e1gua durante o processo de refino, aumentando o teor de hidrog\u00eanio, e o efeito final de desgaseifica\u00e7\u00e3o \u00e9 resultado de um equil\u00edbrio din\u00e2mico. O teor final de hidrog\u00eanio ap\u00f3s o refino e a desgaseifica\u00e7\u00e3o com o agente de refino pulverizado no forno n\u00e3o \u00e9 inferior a 0,22 ~ 0,26 ml por 100 g de alum\u00ednio. Como o agente de refino inevitavelmente cont\u00e9m \u00e1gua durante o processo de produ\u00e7\u00e3o, mesmo o melhor agente de refino atualmente cont\u00e9m, no m\u00ednimo, 0,1% de \u00e1gua, calculado de acordo com a recomenda\u00e7\u00e3o do agente de refino de adicionar 1,5 kg por tonelada, O teor de hidrog\u00eanio introduzido pelo agente de refino por tonelada de alum\u00ednio \u00e9 de 0,083 mol, o que, convertido em um teor padr\u00e3o de 0,187 ml por 100 g de alum\u00ednio, \u00e9 adicionado \u00e0 massa fundida de alum\u00ednio.<\/p>\n

O alto teor de hidrog\u00eanio no fio-matriz de liga de alum\u00ednio de alta resist\u00eancia pode causar defeitos como bolhas, descascamento e pontas quebradas no processo de trefilagem subsequente, al\u00e9m de afetar a condutividade e a resist\u00eancia \u00e0 tra\u00e7\u00e3o do fio-matriz. De acordo com a experi\u00eancia pr\u00e1tica de produ\u00e7\u00e3o do fio-matriz de liga de alum\u00ednio de alta resist\u00eancia e com os requisitos do processo subsequente, o teor de hidrog\u00eanio no fio-matriz n\u00e3o deve exceder 0,14 ml por 100 g de alum\u00ednio. Para requisitos especiais espec\u00edficos, o teor de hidrog\u00eanio n\u00e3o deve exceder 0,12 ml por 100 g de alum\u00ednio. Percebe-se que basear-se apenas no refinamento em forno est\u00e1 longe de atender aos requisitos de qualidade dos fios-matriz de liga de alum\u00ednio de alta resist\u00eancia. Isso requer m\u00e9todos de refinamento em linha.<\/p>","protected":false},"excerpt":{"rendered":"

Aluminum refining in furnace, there are three commonly used inert gas refining, mixed gas refining of inert gas plus chlorine gas, and powder spraying refining.…<\/p>","protected":false},"author":1,"featured_media":5124,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5076","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nAluminum Refining in Furnace | Flux Refining for Aluminum<\/title>\n<meta name=\"description\" content=\"Aluminum refining in furnace, there are three commonly used inert gas refining, mixed gas refining, and powder spraying refining.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/pt\/aluminum-refining-in-furnace\/\" \/>\n<meta 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