{"id":7300,"date":"2020-12-30T03:07:54","date_gmt":"2020-12-30T03:07:54","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7300"},"modified":"2025-08-27T09:55:49","modified_gmt":"2025-08-27T09:55:49","slug":"degassing-of-molten-aluminum","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/degassing-of-molten-aluminum\/","title":{"rendered":"Desgaseifica\u00e7\u00e3o do alum\u00ednio fundido"},"content":{"rendered":"<h1>Desgaseifica\u00e7\u00e3o do alum\u00ednio fundido<\/h1>\n<p>A desgaseifica\u00e7\u00e3o da liga de alum\u00ednio fundida \u00e9 um processo de fundi\u00e7\u00e3o destinado a remover o hidrog\u00eanio dissolvido na massa fundida.<\/p>\n<p>O alum\u00ednio l\u00edquido dissolve ativamente o hidrog\u00eanio, e a solubilidade do hidrog\u00eanio gasoso no ponto de fus\u00e3o do alum\u00ednio l\u00edquido \u00e9 de 2,2 cm\u00b3\/100 g.<\/p>\n<p>Quando o alum\u00ednio se solidifica, a solubilidade do hidrog\u00eanio gasoso diminui drasticamente: o alum\u00ednio, que possui um ponto de fus\u00e3o s\u00f3lido, cont\u00e9m apenas 0,05 cm\u00b3\/100 g de hidrog\u00eanio.<\/p>\n<p>Portanto, a liga de alum\u00ednio libera o excesso de hidrog\u00eanio durante o processo de solidifica\u00e7\u00e3o. Isso leva \u00e0 forma\u00e7\u00e3o de defeitos de porosidade distribu\u00eddos por todo o metal s\u00f3lido. O tamanho e o n\u00famero dos poros de hidrog\u00eanio dependem do teor inicial de hidrog\u00eanio, da composi\u00e7\u00e3o da liga e das condi\u00e7\u00f5es de solidifica\u00e7\u00e3o.<\/p>\n<h2>Desgaseifica\u00e7\u00e3o por fluxo do alum\u00ednio fundido<\/h2>\n<p>Um fluxo composto por sais que cont\u00eam cloro e fl\u00faor \u00e9 utilizado para a desgaseifica\u00e7\u00e3o de ligas de alum\u00ednio fundidas. <a href=\"http:\/\/www.alalloycasting.com\/pt\/aluminum-degassing-flux\/\">Fluxo de desgaseifica\u00e7\u00e3o<\/a> geralmente se apresenta na forma de p\u00f3 ou gr\u00e2nulos.<\/p>\n<p>Quando os gr\u00e2nulos de fundente s\u00e3o imersos no fundo do forno por meio de uma camp\u00e2nula perfurada, limpa e pr\u00e9-aquecida, a opera\u00e7\u00e3o de desgaseifica\u00e7\u00e3o \u00e9 iniciada. Os componentes do fundente reagem com o alum\u00ednio para formar compostos gasosos (cloreto de alum\u00ednio, fluoreto de alum\u00ednio). As bolhas de g\u00e1s sobem na massa fundida. A press\u00e3o parcial do hidrog\u00eanio nas bolhas formadas \u00e9 muito baixa, permitindo que ele se difunda do alum\u00ednio fundido para dentro das bolhas. As bolhas escapam da massa fundida e, em seguida, passam pelo sistema de exaust\u00e3o para remover o g\u00e1s. Esse processo continua at\u00e9 que a forma\u00e7\u00e3o de bolhas cesse.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-7233\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/12\/Aluminum-Granular-Flux-1.jpg\" alt=\"Fluxo granular de alum\u00ednio\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/12\/Aluminum-Granular-Flux-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/12\/Aluminum-Granular-Flux-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<h2>Desgaseificador rotativo<\/h2>\n<p>No m\u00e9todo de desgaseifica\u00e7\u00e3o rotativa, um g\u00e1s inerte ou quimicamente inerte (arg\u00f4nio, nitrog\u00eanio) \u00e9 injetado atrav\u00e9s do eixo rotativo e do rotor. A energia do eixo rotativo resulta na forma\u00e7\u00e3o de um grande n\u00famero de pequenas bolhas, o que proporciona uma rela\u00e7\u00e3o \u00e1rea superficial\/volume muito elevada.<\/p>\n<p><a href=\"http:\/\/www.alalloycasting.com\/pt\/rotary-degassing\/\">Desgaseamento rotativo<\/a> A tecnologia remove esses componentes indesej\u00e1veis por meio da inje\u00e7\u00e3o de um g\u00e1s, geralmente nitrog\u00eanio, no metal fundido. O g\u00e1s \u00e9 normalmente introduzido por meio de um rotor de desgaseifica\u00e7\u00e3o, que reduz o tamanho das bolhas e dispersa o nitrog\u00eanio por todo o banho de metal fundido. Quando as bolhas geradas sobem atrav\u00e9s da massa de metal fundido, elas absorvem o hidrog\u00eanio dissolvido no metal e o removem da massa fundida. Al\u00e9m disso, as part\u00edculas s\u00f3lidas n\u00e3o met\u00e1licas s\u00e3o levadas para a superf\u00edcie pelo efeito de flota\u00e7\u00e3o das bolhas e, em seguida, podem ser removidas por meio da retifica\u00e7\u00e3o do metal.<\/p>","protected":false},"excerpt":{"rendered":"<p>Degassing molten aluminium Degassing of molten aluminum alloy is a casting process designed to remove hydrogen dissolved in the melt. Liquid aluminum will actively dissolve&hellip;<\/p>","protected":false},"author":1,"featured_media":7301,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[94,4488,4491,1755,4484,4490,659,1485,4486,4489,4481,4480,4482,4493,4487,95,1487,8303,31,4492,4485,4483],"class_list":["post-7300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminium-degassing-machine","tag-aluminium-degassing-treatment","tag-aluminium-liquid-degasser","tag-aluminum-degassing-treatment","tag-degasser-machine-at-best-price","tag-degassing-and-purification-system","tag-degassing-box","tag-degassing-equipment","tag-degassing-machine-degassing","tag-degassing-system-for-aluminium","tag-dual-rotor-online-al-melt-degasser","tag-dual-rotors-degassing-machine","tag-dual-rotor-online-degasser","tag-flux-injection-rotary-degasser","tag-in-line-degassing-equipment","tag-metal-degassing-systems","tag-molten-aluminium-degassing-machine","tag-molten-aluminium-degassing-refining-machine","tag-molten-aluminum-refining-degassing","tag-online-degassing-unit","tag-rotary-degassing-and-fluxing-unit-for-aluminum-alloys","tag-spinning-rotor-degassing"],"yoast_head":"<!-- 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