{"id":10612,"date":"2021-10-14T09:07:06","date_gmt":"2021-10-14T09:07:06","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10612"},"modified":"2021-10-14T09:07:06","modified_gmt":"2021-10-14T09:07:06","slug":"furnace-refining-with-flux","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/furnace-refining-with-flux\/","title":{"rendered":"Refinamento em forno com fundente"},"content":{"rendered":"<p>A refina\u00e7\u00e3o em forno com fundente \u00e9 amplamente utilizada em fundi\u00e7\u00f5es de alum\u00ednio. O principal objetivo da tecnologia de purifica\u00e7\u00e3o de alum\u00ednio fundido \u00e9 melhorar continuamente a pureza do metal fundido, buscar constantemente tecnologias de purifica\u00e7\u00e3o de alta efici\u00eancia e baixo custo e atender \u00e0s necessidades de desenvolvimento da tecnologia de purifica\u00e7\u00e3o de alum\u00ednio fundido.<\/p>\n<p>As inclus\u00f5es nas massas fundidas de alum\u00ednio e ligas de alum\u00ednio s\u00e3o, principalmente, \u00f3xidos de alum\u00ednio. Os danos causados pelas inclus\u00f5es ao alum\u00ednio e \u00e0s ligas de alum\u00ednio n\u00e3o se limitam apenas aos seus efeitos adversos sobre as propriedades do material. Al\u00e9m disso, o teor de inclus\u00f5es exerce certa influ\u00eancia sobre o teor de hidrog\u00eanio na massa fundida e atua como um bom transportador de hidrog\u00eanio na massa fundida. Portanto, o teor de inclus\u00f5es tamb\u00e9m afeta a quantidade de porosidade ou microporos na pe\u00e7a fundida.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10614\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/10\/Flux-for-Aluminum-Foundry-1.jpg\" alt=\"\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/10\/Flux-for-Aluminum-Foundry-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/10\/Flux-for-Aluminum-Foundry-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Ap\u00f3s adicionar uma determinada quantidade de fundente \u00e0s massas fundidas de alum\u00ednio e ligas de alum\u00ednio, \u00e9 poss\u00edvel reduzir efetivamente o teor de inclus\u00f5es na massa fundida. A refina\u00e7\u00e3o em forno com fundente desempenha um papel fundamental no processo de remo\u00e7\u00e3o de impurezas da massa fundida, principalmente em dois aspectos:<\/p>\n<p>(1) A solubilidade do fundente no alum\u00ednio e nas ligas de alum\u00ednio \u00e9 baixa. Durante a solidifica\u00e7\u00e3o da massa fundida, o fundente se concentra nos limites dos gr\u00e3os ou na interface s\u00f3lido-l\u00edquido, e as inclus\u00f5es de \u00f3xido tamb\u00e9m se concentram nos limites dos gr\u00e3os durante o processo de solidifica\u00e7\u00e3o, o que proporciona boas condi\u00e7\u00f5es para a rea\u00e7\u00e3o de contato entre o fundente e as inclus\u00f5es de Al\u2082O\u2083. As inclus\u00f5es de alum\u00ednio s\u00e3o reduzidas a alum\u00ednio elementar e devolvidas \u00e0 massa fundida. O produto da rea\u00e7\u00e3o entre o fundente e a alumina \u00e9 um \u00f3xido de alto ponto de fus\u00e3o, cuja densidade \u00e9 maior do que a da massa fundida de alum\u00ednio. Portanto, ele pode afundar at\u00e9 o fundo do tanque para ser removido por sedimenta\u00e7\u00e3o, alcan\u00e7ando assim o objetivo de remo\u00e7\u00e3o de impurezas.<\/p>\n<p>(2) O fluxo \u00e9 um elemento ativo na superf\u00edcie. Quando o fluxo \u00e9 utilizado como uma superf\u00edcie <a href=\"http:\/\/www.alalloycasting.com\/pt\/covering-agent\/\">agente de cobertura<\/a>, forma-se um \u00f3xido complexo do fundente na superf\u00edcie do material fundido, o que torna a pel\u00edcula de \u00f3xido superficial mais densa e impede ainda mais a oxida\u00e7\u00e3o do material fundido.<\/p>","protected":false},"excerpt":{"rendered":"<p>Furnace refining with flux is widely used in aluminum foundry. The main goal of aluminum melt purification technology is to continuously improve the purity of&hellip;<\/p>","protected":false},"author":1,"featured_media":10613,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-10612","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Furnace Refining with Flux used in Aluminum Foundry<\/title>\n<meta name=\"description\" content=\"Furnace refining with flux is widely used in aluminum foundry. 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