{"id":10640,"date":"2021-10-15T05:36:33","date_gmt":"2021-10-15T05:36:33","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10640"},"modified":"2021-10-15T05:36:33","modified_gmt":"2021-10-15T05:36:33","slug":"molten-aluminum-flux-refining","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/molten-aluminum-flux-refining\/","title":{"rendered":"Refinamento com fluxo de alum\u00ednio fundido"},"content":{"rendered":"

O m\u00e9todo mais amplamente aceito e mais comumente utilizado para remover inclus\u00f5es, como pel\u00edculas de \u00f3xido, do alum\u00ednio fundido \u00e9 o refinamento com fundente.<\/p>\n

A composi\u00e7\u00e3o qu\u00edmica utilizada no fundente depende dos objetivos do processo de fundi\u00e7\u00e3o (remo\u00e7\u00e3o de \u00e1lcalis, limpeza, separa\u00e7\u00e3o de esc\u00f3ria). Fundentes \u00e0 base de Na\u2082SO\u2084 e NaCl s\u00e3o utilizados para reduzir a porcentagem de inclus\u00f5es de \u00f3xidos no alum\u00ednio fundido, ligando-as \u00e0 superf\u00edcie da massa fundida.<\/p>\n

Porque adicionar fluxo de refino<\/a> nas pe\u00e7as fundidas de alum\u00ednio podem reduzir as inclus\u00f5es, aumentando assim a fluidez do metal.<\/p>\n

A fluidez \u00e9 a capacidade do metal l\u00edquido de fluir \u00e0 temperatura de fus\u00e3o antes de parar devido \u00e0 solidifica\u00e7\u00e3o. A influ\u00eancia das inclus\u00f5es na fluidez consiste no fato de que a fluidez do alum\u00ednio puro \u00e9 significativamente reduzida devido \u00e0 presen\u00e7a de inclus\u00f5es de \u00f3xido, pois essas inclus\u00f5es bloqueiam o fluxo do metal l\u00edquido. A fluidez da amostra aumenta com a adi\u00e7\u00e3o de fundente.<\/p>\n

Os \u00f3xidos s\u00e3o as inclus\u00f5es mais comuns no processo de fundi\u00e7\u00e3o de metais. Se o alum\u00ednio fundido n\u00e3o for submetido a um tratamento de refino adequado, as inclus\u00f5es de \u00f3xido permanecer\u00e3o no lingote de alum\u00ednio fundido, o que inevitavelmente causar\u00e1 diversos problemas, como propriedades mec\u00e2nicas reduzidas, baixa usinabilidade e baixa qualidade da superf\u00edcie. Para reduzir a presen\u00e7a de defeitos no produto final, \u00e9 importante utilizar alum\u00ednio fundido que n\u00e3o contenha impurezas durante o processo de fundi\u00e7\u00e3o.<\/p>\n

\"\"<\/p>\n

O alum\u00ednio reciclado \u00e9 aquele produzido por meio de processos de reciclagem de alum\u00ednio, tendo a sucata de alum\u00ednio como principal fonte. O uso de sucata de alum\u00ednio no processo de reciclagem apresenta uma desvantagem, pois cont\u00e9m muitos elementos impuros que n\u00e3o s\u00e3o necess\u00e1rios na fundi\u00e7\u00e3o de metais. Essas impurezas s\u00e3o consideradas inclus\u00f5es indesejadas e reduzem a qualidade do produto final. No processo de fundi\u00e7\u00e3o de metais, as inclus\u00f5es podem causar defeitos, reduzindo assim a qualidade do produto final.<\/p>\n

A adi\u00e7\u00e3o de fundente melhora a qualidade do alum\u00ednio fundido durante o processo de fundi\u00e7\u00e3o. Isso se deve \u00e0 a\u00e7\u00e3o do fundente, que fixa as inclus\u00f5es de \u00f3xido presentes no metal fundido \u00e0 superf\u00edcie. \u00c0 medida que a porcentagem em peso e a temperatura de fus\u00e3o do fundente aumentam at\u00e9 atingirem seu ponto ideal, as inclus\u00f5es de \u00f3xido diminuem. O tratamento de refino com fluxo do alum\u00ednio fundido apresenta a maior efici\u00eancia na remo\u00e7\u00e3o de inclus\u00f5es de \u00f3xido.<\/p>","protected":false},"excerpt":{"rendered":"

The most widely accepted and most commonly used method for removing inclusions such as oxide films from molten aluminum is flux refining. The chemical composition…<\/p>","protected":false},"author":1,"featured_media":10643,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-10640","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nMolten Aluminum Flux Refining, Fluxes for Metal Casting<\/title>\n<meta name=\"description\" content=\"The most widely accepted and most commonly used method for removing inclusions such as oxide films from molten aluminum is flux 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\/molten-aluminum-flux-refining\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Molten 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