{"id":4035,"date":"2020-08-23T05:13:08","date_gmt":"2020-08-23T05:13:08","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4035"},"modified":"2020-08-23T05:13:08","modified_gmt":"2020-08-23T05:13:08","slug":"refining-process-of-aluminum-alloy","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/refining-process-of-aluminum-alloy\/","title":{"rendered":"Processo de refino de liga de alum\u00ednio"},"content":{"rendered":"

O processo de refino da liga de alum\u00ednio \u00e9 uma etapa importante na fundi\u00e7\u00e3o de ligas de alum\u00ednio. Normalmente, utiliza-se fundente para o refinamento no forno. De acordo com a fus\u00e3o do cadinho e o peso da carga, a carga, o lingote de liga, a liga-m\u00e3e e o metal puro s\u00e3o adicionados ao cadinho, um por um ou simultaneamente, e aquecidos para derret\u00ea-los. Quando se adiciona magn\u00e9sio, o bloco de magn\u00e9sio \u00e9 pressionado na parte inferior do l\u00edquido da liga com uma tampa em forma de sino, girado lentamente e agitado uniformemente; em seguida, todo o magn\u00e9sio \u00e9 derretido e a tampa em forma de sino \u00e9 retirada.<\/p>\n

Depois que a carga estiver completamente derretida, quando a temperatura do l\u00edquido da liga atingir 690 ~ 740 \u2103, introduza o fluxo de refino na liga l\u00edquida em duas ou tr\u00eas etapas (a uma dist\u00e2ncia de 10 a 15 cm do fundo do cadinho) com uma camp\u00e2nula, gire lentamente at\u00e9 que a rea\u00e7\u00e3o cesse e, em seguida, retire a camp\u00e2nula. Quando o clima estiver \u00famido ou a quantidade de material de reaquecimento for grande, o limite superior de fluxo de refino<\/a> A dosagem depende do efeito refinador.<\/p>\n

Ap\u00f3s o processo de refino da liga de alum\u00ednio, ela \u00e9 deixada em repouso por 10 a 20 minutos; em seguida, a esc\u00f3ria na superf\u00edcie do l\u00edquido da liga \u00e9 removida, e ent\u00e3o o l\u00edquido da liga \u00e9 transferido para o forno de manuten\u00e7\u00e3o ou fundido diretamente. Durante todo o processo de fus\u00e3o e fundi\u00e7\u00e3o, a temperatura da liga l\u00edquida n\u00e3o deve ser muito alta e n\u00e3o deve exceder 750 \u00b0C por um curto per\u00edodo de tempo.<\/p>\n

\"Processo<\/p>\n

O tempo de fus\u00e3o e vazamento da liga deve ser reduzido ao m\u00e1ximo e n\u00e3o deve exceder 8 horas, contadas do in\u00edcio da fus\u00e3o da liga at\u00e9 a conclus\u00e3o do vazamento.<\/p>\n

O tempo de perman\u00eancia do l\u00edquido da liga refinada ap\u00f3s a fundi\u00e7\u00e3o ou a fundi\u00e7\u00e3o sob press\u00e3o n\u00e3o deve exceder 4 horas; caso contr\u00e1rio, deve-se realizar um refinamento complementar.<\/p>\n

A temperatura de refino \u00e9 a mesma que a temperatura de fundi\u00e7\u00e3o. A quantidade de fluxo de refino \u00e9 de 0,2 a 0,41 TP3T do peso residual do l\u00edquido da liga. A perda de magn\u00e9sio deve ser aumentada no refino da liga de Al.<\/p>\n

No processo de fundi\u00e7\u00e3o, n\u00e3o adicione arbitrariamente o material residual do canal de alimenta\u00e7\u00e3o ou das pe\u00e7as rejeitadas \u00e0 liga l\u00edquida; caso contr\u00e1rio, ser\u00e1 necess\u00e1rio refin\u00e1-la novamente.<\/p>\n

Quando a profundidade da liga l\u00edquida restante no fundo do cadinho for inferior a 50 mm, ela n\u00e3o poder\u00e1 ser fundida novamente, mas poder\u00e1 ser derretida continuamente com a adi\u00e7\u00e3o de mat\u00e9ria-prima ou vertida em uma nova liga l\u00edquida.<\/p>\n

Durante todo o processo de fus\u00e3o, \u00e9 necess\u00e1rio minimizar os danos \u00e0 camada de \u00f3xido na superf\u00edcie da liga l\u00edquida. Ao retirar a liga l\u00edquida com a p\u00e1, a camada de \u00f3xido deve ser removida primeiro, a fim de evitar que a zona de oxida\u00e7\u00e3o seja incorporada \u00e0 liga l\u00edquida.<\/p>","protected":false},"excerpt":{"rendered":"

Refining process of aluminum alloy is an important step in aluminum alloy casting. Flux is usually used for refining in the furnace. According to the…<\/p>","protected":false},"author":1,"featured_media":4036,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[4501],"class_list":["post-4035","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-refining-process-of-aluminum-alloy"],"yoast_head":"\nRefining Process of Aluminum Alloy in the Smelting Furnace<\/title>\n<meta name=\"description\" content=\"After the refining process of aluminum alloy, it is allowed to stand for 10-20 minutes, then remove the slag on the surface of the liquid.\" \/>\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\/refining-process-of-aluminum-alloy\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" 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