{"id":10297,"date":"2021-09-16T06:24:12","date_gmt":"2021-09-16T06:24:12","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10297"},"modified":"2021-09-16T06:24:12","modified_gmt":"2021-09-16T06:24:12","slug":"secondary-aluminium-smelting","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/secondary-aluminium-smelting\/","title":{"rendered":"Fus\u00e3o de alum\u00ednio secund\u00e1rio"},"content":{"rendered":"<p>A fundi\u00e7\u00e3o secund\u00e1ria de alum\u00ednio consiste em adicionar uma determinada propor\u00e7\u00e3o de sucata de alum\u00ednio e de ligas de alum\u00ednio ao forno de fundi\u00e7\u00e3o e, ap\u00f3s a fus\u00e3o r\u00e1pida, o material fundido \u00e9 tratado adequadamente para se obter fundidos de alum\u00ednio e de ligas de alum\u00ednio que atendam aos padr\u00f5es de qualidade. No processo de fundi\u00e7\u00e3o secund\u00e1ria de alum\u00ednio, ocorrem muitas altera\u00e7\u00f5es e rea\u00e7\u00f5es f\u00edsico-qu\u00edmicas entre a pr\u00f3pria liga e o ambiente dentro e fora do forno, e essas rea\u00e7\u00f5es afetam a qualidade do material fundido.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-10298\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/09\/Secondary-Aluminium-Smelting.jpg\" alt=\"Fus\u00e3o de alum\u00ednio secund\u00e1rio\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/09\/Secondary-Aluminium-Smelting.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/09\/Secondary-Aluminium-Smelting-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p><strong>As ligas fundidas de alum\u00ednio e ligas de alum\u00ednio qualificadas devem atender aos seguintes aspectos:<\/strong><\/p>\n<p>(1) A composi\u00e7\u00e3o qu\u00edmica est\u00e1 dentro dos par\u00e2metros exigidos. Em primeiro lugar, o teor de cada elemento de liga deve estar dentro da faixa permitida. Al\u00e9m dos elementos de liga, em diversas mat\u00e9rias-primas met\u00e1licas, devido a v\u00e1rias raz\u00f5es, existem muitos tipos de elementos ou diversos gases e inclus\u00f5es que t\u00eam efeitos adversos sobre o alum\u00ednio e as ligas de alum\u00ednio, mas que n\u00e3o podem ser completamente removidos. Para garantir o desempenho dos materiais, o teor da composi\u00e7\u00e3o qu\u00edmica dos diversos elementos de impureza deve estar dentro da faixa permitida.<\/p>\n<p>(2) A massa fundida deve estar limpa. No processo de fus\u00e3o t\u00e9rmica do alum\u00ednio e das ligas de alum\u00ednio, devido \u00e0s fortes rea\u00e7\u00f5es qu\u00edmicas de v\u00e1rios elementos qu\u00edmicos em condi\u00e7\u00f5es de alta temperatura e ao descuido durante o processo operacional, alguns objetos estranhos, tais como <a href=\"http:\/\/www.alalloycasting.com\/pt\/fluxes\/\">fluxos<\/a>, esc\u00f3ria ou diversos gases, etc., s\u00e3o introduzidos na massa fundida, e esses corpos estranhos afetar\u00e3o negativamente o desempenho do material durante o processo de solidifica\u00e7\u00e3o subsequente. Portanto, eles devem ser removidos, na medida do poss\u00edvel, durante a opera\u00e7\u00e3o de fundi\u00e7\u00e3o de alum\u00ednio secund\u00e1rio.<\/p>\n<p>(3) A temperatura \u00e9 adequada. Durante a opera\u00e7\u00e3o de fundi\u00e7\u00e3o do alum\u00ednio e das ligas de alum\u00ednio, o alum\u00ednio e as ligas de alum\u00ednio \u2014 que se encontram no estado s\u00f3lido \u00e0 temperatura ambiente \u2014 s\u00e3o aquecidos a uma temperatura acima do ponto de fus\u00e3o para provocar uma mudan\u00e7a de fase e se transformarem no estado l\u00edquido. Em altas temperaturas, o alum\u00ednio e as ligas de alum\u00ednio, bem como o ambiente, sofrem diversos efeitos devido ao aumento da atividade qu\u00edmica, o que polui a massa fundida; essas altera\u00e7\u00f5es s\u00e3o irrevers\u00edveis e afetam negativamente o desempenho do alum\u00ednio e das ligas de alum\u00ednio. Portanto, durante o processo de fus\u00e3o, a temperatura deve ser controlada de forma a reduzi-la ao m\u00e1ximo, desde que sejam atendidos os requisitos de solidifica\u00e7\u00e3o subsequentes, a fim de minimizar o impacto sobre a qualidade do material fundido.<\/p>","protected":false},"excerpt":{"rendered":"<p>The secondary aluminium smelting is to add a certain proportion of aluminum and aluminum alloy scraps into the smelting furnace, and after rapid melting, the&hellip;<\/p>","protected":false},"author":1,"featured_media":10298,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-10297","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>Secondary Aluminium Smelting Process in 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