{"id":4018,"date":"2020-08-22T14:36:25","date_gmt":"2020-08-22T14:36:25","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4018"},"modified":"2020-08-22T14:36:25","modified_gmt":"2020-08-22T14:36:25","slug":"aluminum-melt-refining","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/aluminum-melt-refining\/","title":{"rendered":"Refinamento de alum\u00ednio fundido"},"content":{"rendered":"<p>O refinamento do alum\u00ednio fundido tem como objetivo remover gases e inclus\u00f5es da massa fundida e uniformizar a composi\u00e7\u00e3o da liga. O refinamento \u00e9 um processo de grande import\u00e2ncia na fundi\u00e7\u00e3o do alum\u00ednio. O <a href=\"http:\/\/www.alalloycasting.com\/pt\/refining-flux\/\">fluxo de refino <\/a>deve ser selecionado corretamente e sua dosagem deve ser controlada para aumentar a qualidade da liga em 0,5% \u2013 0,7%. Controle a temperatura de refino, que geralmente deve ser mantida entre 700 e 720 \u2103.<\/p>\n<p>Durante o processo de refino do alum\u00ednio fundido, aproximadamente 2\/3 do fluxo de refino \u00e9 injetado na superf\u00edcie do metal fundido em lotes, por meio de uma tampa em forma de sino, e, em seguida, \u00e9 girado lenta e uniformemente no sentido hor\u00e1rio. A velocidade deve ser baixa e o movimento deve ser est\u00e1vel para evitar grandes deslocamentos do metal fundido, a fim de impedir o aumento do teor de hidrog\u00eanio.<\/p>\n<p>O refinamento da liga de alum\u00ednio \u00e9 um processo de grande import\u00e2ncia na produ\u00e7\u00e3o de pe\u00e7as fundidas. Muitos anos de experi\u00eancia em produ\u00e7\u00e3o comprovaram que, quando o processo de fundi\u00e7\u00e3o n\u00e3o \u00e9 rigorosamente controlado, as pe\u00e7as fundidas ficam sujeitas a poros, esc\u00f3ria de \u00f3xido, inclus\u00f5es, cavidades de retra\u00e7\u00e3o e outros defeitos que afetam diretamente a qualidade das pe\u00e7as fundidas.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4019\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/08\/Aluminum-Melt-Refining-1.jpg\" alt=\"Refinamento de alum\u00ednio fundido\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Aluminum-Melt-Refining-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/08\/Aluminum-Melt-Refining-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>O forno de pr\u00e9-aquecimento \u00e9 preenchido com lingotes de liga pr\u00e9-formados e materiais de aquecimento de alta qualidade, e os elementos de liga s\u00e3o adicionados por \u00faltimo. O fluxo de cobertura, o fluxo de refino e o modificador de Sr s\u00e3o utilizados de acordo com as especifica\u00e7\u00f5es do processo estabelecidas.<\/p>\n<p>Controle rigorosamente a temperatura de fus\u00e3o da liga de alum\u00ednio. Somente na temperatura correta \u00e9 poss\u00edvel obter uma liga l\u00edquida de alta qualidade, evitando o superaquecimento. Se a temperatura for muito alta, as perdas por oxida\u00e7\u00e3o e combust\u00e3o de v\u00e1rios elementos da liga aumentar\u00e3o, e a composi\u00e7\u00e3o qu\u00edmica da liga ser\u00e1 alterada. Se a temperatura for muito baixa, a composi\u00e7\u00e3o qu\u00edmica da liga n\u00e3o ser\u00e1 uniforme, as inclus\u00f5es de \u00f3xido e os gases na liga n\u00e3o ser\u00e3o facilmente eliminados e o desempenho da liga ser\u00e1 reduzido, o que afetar\u00e1 o desempenho da fundi\u00e7\u00e3o.<\/p>\n<p>O controle rigoroso do tempo de fundi\u00e7\u00e3o e a opera\u00e7\u00e3o em ritmo acelerado podem reduzir a absor\u00e7\u00e3o de impurezas e as inclus\u00f5es de oxida\u00e7\u00e3o, aumentar a perda por combust\u00e3o dos elementos da liga e afetar a composi\u00e7\u00e3o qu\u00edmica da liga.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminum melt refining is to remove gas and inclusion in melt and make alloy composition uniform. Refining is a very important process in aluminum smelting&hellip;<\/p>","protected":false},"author":1,"featured_media":4020,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[4498],"class_list":["post-4018","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminum-melt-refining"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aluminum Melt Refining in Aluminum Alloy Smelting Process<\/title>\n<meta name=\"description\" content=\"Aluminum melt refining in aluminum alloy smelting process is to remove gas and inclusion in melt and make alloy composition uniform.\" \/>\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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