{"id":2162,"date":"2020-06-05T01:38:40","date_gmt":"2020-06-05T01:38:40","guid":{"rendered":"http:\/\/alalloycasting.com\/?p=2162"},"modified":"2020-08-31T08:32:22","modified_gmt":"2020-08-31T08:32:22","slug":"aluminium-refining-process","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/aluminium-refining-process\/","title":{"rendered":"Processo de refino do alum\u00ednio"},"content":{"rendered":"

No processo de fundi\u00e7\u00e3o do alum\u00ednio e de ligas de alum\u00ednio, al\u00e9m de suas pr\u00f3prias inclus\u00f5es, o alum\u00ednio tem grande tend\u00eancia a formar alumina ou sub-alumina ao reagir com o oxig\u00eanio. Isso resulta em uma camada de esc\u00f3ria na superf\u00edcie do alum\u00ednio fundido, que apresenta certa molhabilidade com o alum\u00ednio fundido, e uma quantidade consider\u00e1vel de alum\u00ednio fundido fica misturada \u00e0 esc\u00f3ria. O processo de refino do alum\u00ednio pode alterar a molhabilidade, aumentando a tens\u00e3o superficial na interface entre a esc\u00f3ria e o alum\u00ednio, de modo a separar a esc\u00f3ria do alum\u00ednio.<\/p>\n

Fluxos<\/a> Os fluxos para alum\u00ednio e ligas de alum\u00ednio s\u00e3o geralmente compostos por cloretos e fluoretos de metais alcalinos e alcalino-terrosos. Os principais componentes s\u00e3o KCl, NaCl, NaF, CaF\u2082, Na\u2083AlF\u2086, Na\u2082SiF\u2086, etc., mas o teor desses componentes varia, e o efeito tamb\u00e9m \u00e9 diferente. Al\u00e9m de utilizar o fundente produzido por AdTech<\/a>, o ideal \u00e9 adaptar-se ao local. Ao mesmo tempo, \u00e9 preciso controlar rigorosamente as condi\u00e7\u00f5es do processo de refino, tais como a quantidade de fundente, o tempo de contato, a \u00e1rea de contato, as condi\u00e7\u00f5es de agita\u00e7\u00e3o, a temperatura, etc. Os agentes de refino podem reduzir efetivamente o teor de alum\u00ednio na esc\u00f3ria e diminuir as perdas na fundi\u00e7\u00e3o.<\/p>\n

\"Processo<\/p>\n

Processo de refino do alum\u00ednio<\/h2>\n

Cinza de alum\u00ednio<\/a> \u00e9 uma parte inevit\u00e1vel do processo de fus\u00e3o e fundi\u00e7\u00e3o. Apesar das medidas tomadas, uma certa propor\u00e7\u00e3o de alum\u00ednio met\u00e1lico ser\u00e1 removida e precisa ser tratada de forma eficaz. O m\u00e9todo mais f\u00e1cil e econ\u00f4mico consiste em utilizar um rolo para triturar a esc\u00f3ria de alum\u00ednio repetidamente e, em seguida, peneir\u00e1-la, a fim de recuperar efetivamente parte do alum\u00ednio.<\/p>\n

A inclina\u00e7\u00e3o da escorva de alum\u00ednio no forno misto afeta diretamente a quantidade de esc\u00f3ria de alum\u00ednio. Se a inclina\u00e7\u00e3o for muito acentuada, a maior parte da esc\u00f3ria n\u00e3o ser\u00e1 removida, resultando em uma grande quantidade de esc\u00f3ria de alum\u00ednio e deposi\u00e7\u00e3o de alum\u00ednio. A esc\u00f3ria e os dep\u00f3sitos de alum\u00ednio n\u00e3o podem ser recuperados a tempo durante a limpeza do forno. Tendo como premissa garantir a capacidade do forno de mistura, reduza a inclina\u00e7\u00e3o da esc\u00f3ria o m\u00e1ximo poss\u00edvel.<\/p>\n

A opera\u00e7\u00e3o de remo\u00e7\u00e3o de esc\u00f3ria consiste basicamente em retirar manualmente a esc\u00f3ria de alum\u00ednio pela porta do forno, utilizando um grande ancinho. Al\u00e9m da opera\u00e7\u00e3o cuidadosa por parte da equipe durante esse processo, procure n\u00e3o deixar que o alum\u00ednio l\u00edquido seja retirado. Ao mesmo tempo, recomenda-se abrir v\u00e1rias fileiras de pequenos orif\u00edcios redondos na superf\u00edcie do grande ancinho, para que o alum\u00ednio l\u00edquido contido na esc\u00f3ria de alum\u00ednio possa fluir de volta para o forno. Caso contr\u00e1rio, uma quantidade excessiva de alum\u00ednio l\u00edquido ser\u00e1 retirada, causando danos por queima.<\/p>","protected":false},"excerpt":{"rendered":"

In the smelting process of aluminum and aluminum alloy, in addition to its own inclusions, aluminum is very easy to form alumina or sub-alumina with…<\/p>","protected":false},"author":1,"featured_media":4372,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120,138],"tags":[239,312],"class_list":["post-2162","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fluxes","category-seo","tag-aluminium-refining-process","tag-aluminum-refining-fluxes"],"yoast_head":"\nAluminium Refining Process with Aluminum Refining Fluxes<\/title>\n<meta name=\"description\" content=\"Aluminium refining process can change the wettability, increase the surface tension at the interface between the slag and aluminum.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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