{"id":5080,"date":"2020-09-25T06:00:25","date_gmt":"2020-09-25T06:00:25","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5080"},"modified":"2021-02-01T08:29:20","modified_gmt":"2021-02-01T08:29:20","slug":"liquid-aluminum-refining","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/liquid-aluminum-refining\/","title":{"rendered":"Refino de alum\u00ednio l\u00edquido"},"content":{"rendered":"

O objetivo do refino do alum\u00ednio l\u00edquido \u00e9 remover esc\u00f3ria e g\u00e1s. O agente de refino produz uma s\u00e9rie de compostos ou gases por meio de uma determinada rea\u00e7\u00e3o qu\u00edmica com o alum\u00ednio fundido, o que desempenha a fun\u00e7\u00e3o de desgaseifica\u00e7\u00e3o e remo\u00e7\u00e3o de esc\u00f3ria. Os principais componentes do agente de refino s\u00e3o CL\u207b, K\u207a, Na\u207a, AlF\u2083\u207b, CO\u2083\u207b e assim por diante. Existem agentes de limpeza voltados para a desgaseifica\u00e7\u00e3o e agentes de limpeza voltados para a remo\u00e7\u00e3o de esc\u00f3ria. Geralmente, trata-se de um tipo comum que realiza tanto a remo\u00e7\u00e3o de esc\u00f3ria quanto a desgaseifica\u00e7\u00e3o. agente refinador<\/a>. Quando a temperatura do alum\u00ednio fundido atinge 720\u2013730 \u2103, o agente de refino e o removedor de esc\u00f3ria s\u00e3o injetados uniformemente no alum\u00ednio fundido em v\u00e1rios pontos com nitrog\u00eanio de alta pureza (teor de nitrog\u00eanio de 99,99%) por meio do dispositivo de refino, a fim de fazer com que a esc\u00f3ria presente no l\u00edquido flutue at\u00e9 a superf\u00edcie do alum\u00ednio fundido para extra\u00e7\u00e3o. Para melhorar o efeito de desgaseifica\u00e7\u00e3o na refina\u00e7\u00e3o do alum\u00ednio l\u00edquido, adiciona-se hexacloroetano peneirado durante a refina\u00e7\u00e3o e mant\u00e9m-se por 5 a 8 minutos. Ao utilizar o agente de refina\u00e7\u00e3o, \u00e9 preciso prestar aten\u00e7\u00e3o e nunca permitir que o agente de refina\u00e7\u00e3o \u00famido entre no alum\u00ednio l\u00edquido.<\/p>\n

A maioria das ferramentas de fundi\u00e7\u00e3o \u00e9 feita de ferro, como cadinhos, ancinhos de ferro, camp\u00e2nulas, conchas, colheres de amostragem, etc. Se esses utens\u00edlios de ferro n\u00e3o forem tratados e pr\u00e9-aquecidos, o teor de ferro no alum\u00ednio fundido aumentar\u00e1 e, ao mesmo tempo, os gases e as inclus\u00f5es no alum\u00ednio fundido tamb\u00e9m aumentar\u00e3o devido \u00e0 corros\u00e3o do alum\u00ednio fundido causada pela absor\u00e7\u00e3o de vapor de \u00e1gua. Portanto, as ferramentas de fundi\u00e7\u00e3o devem ser desengraxadas, desoxidadas e pintadas antes do uso (consulte a Tabela 1 para a f\u00f3rmula do revestimento). As ferramentas pintadas devem ser completamente secas.<\/p>\n

\"Refino<\/p>\n

O forno de fus\u00e3o e fundi\u00e7\u00e3o \u00e9 utilizado h\u00e1 muito tempo. O ac\u00famulo de esc\u00f3ria nas paredes e no fundo do forno afeta a absor\u00e7\u00e3o de aditivos met\u00e1licos, bem como os processos de desgaseifica\u00e7\u00e3o e remo\u00e7\u00e3o de esc\u00f3ria, podendo facilmente causar defeitos como composi\u00e7\u00e3o de liga fora dos padr\u00f5es, lingotes soltos e inclus\u00f5es de esc\u00f3ria; por isso, recomenda-se utilizar um agente de limpeza semanalmente ou realizar uma limpeza manual a cada 10 fus\u00f5es.<\/p>","protected":false},"excerpt":{"rendered":"

The purpose of liquid aluminum refining is to remove slag and gas. The refining agent produces a number of compounds or gases through a certain…<\/p>","protected":false},"author":1,"featured_media":5115,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5080","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nLiquid Aluminum Refining by Refining Agent in Furnace<\/title>\n<meta name=\"description\" content=\"The purpose of liquid aluminum refining is to remove slag and gas. 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