{"id":9047,"date":"2021-06-03T03:28:34","date_gmt":"2021-06-03T03:28:34","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9047"},"modified":"2021-06-03T03:29:33","modified_gmt":"2021-06-03T03:29:33","slug":"degassing-with-fluxing-gas","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/degassing-with-fluxing-gas\/","title":{"rendered":"Desgaseifica\u00e7\u00e3o com g\u00e1s de fluxo"},"content":{"rendered":"<p>A desgaseifica\u00e7\u00e3o com g\u00e1s de fluxo pode remover o hidrog\u00eanio e as inclus\u00f5es do alum\u00ednio fundido. No que diz respeito aos gases de fluxo, o que se prev\u00ea \u00e9 que um g\u00e1s n\u00e3o reativo, de prefer\u00eancia juntamente com um g\u00e1s cloreto reativo ou outro g\u00e1s halog\u00eanico adequado, seja borbulhado atrav\u00e9s do alum\u00ednio fundido na c\u00e2mara de desgaseifica\u00e7\u00e3o. O g\u00e1s cloreto utilizado pode ser um cloreto vaporoso, como o cloreto de alum\u00ednio ou o hexacloroetano, ou qualquer fonte adequada de cloro ativo; embora o cloro seja preferido devido \u00e0 sua disponibilidade e facilidade de manuseio, ele \u00e9 fornecido em conjunto com um g\u00e1s de fluxo n\u00e3o reativo. Embora um g\u00e1s clor\u00ednico, especialmente o cloro, seja preferido, outros gases halogenados ou halogenetos adequados para o fluxo do alum\u00ednio fundido tamb\u00e9m podem ser utilizados. Esses gases incluem o tetrafluoreto de boro e o fl\u00faor, mas s\u00e3o menos preferidos do que o g\u00e1s clor\u00ednico, uma vez que apresentam riscos \u00e0 sa\u00fade.<\/p>\n<p>O fluxo de g\u00e1s n\u00e3o reativo pode ser qualquer um dos gases comumente designados como gases inertes, tais como h\u00e9lio, n\u00e9on, arg\u00f4nio, cript\u00f4nio, xen\u00f4nio e suas misturas, embora o arg\u00f4nio seja preferido por raz\u00f5es de custo e disponibilidade. Al\u00e9m disso, o nitrog\u00eanio ou o di\u00f3xido de carbono podem ser utilizados como g\u00e1s n\u00e3o reativo, desde que sejam tomadas medidas adequadas para evitar a forma\u00e7\u00e3o de carbonetos ou nitretos.<\/p>\n<p>Embora, especialmente quando a carga est\u00e1 relativamente limpa, o g\u00e1s de fluxo n\u00e3o reativo por si s\u00f3 seja capaz de remover as impurezas de TiO\u2082, SiO\u2082 e CaO, \u00e9 prefer\u00edvel utilizar tamb\u00e9m g\u00e1s clor\u00edneo ou outro g\u00e1s halogenado, o que potencializa a a\u00e7\u00e3o de fluxo e tamb\u00e9m melhora a remo\u00e7\u00e3o de outros contaminantes.<\/p>\n<p>A desgaseifica\u00e7\u00e3o com g\u00e1s fluxante utiliza uma mistura de gases; uma mistura de 2 a 10 por cento de cloro em arg\u00f4nio \u00e9 bastante adequada. Os gases devem, de prefer\u00eancia, ser misturados antes da introdu\u00e7\u00e3o no <a href=\"http:\/\/www.alalloycasting.com\/pt\/degassing-chamber\/\">c\u00e2mara de desgaseifica\u00e7\u00e3o<\/a>. Ou seja, pr\u00e9-misturar os respectivos gases e introduzir essa mistura por todos os dispersores \u00e9 consideravelmente mais vantajoso do que introduzir o g\u00e1s halogenado ou clorado por alguns dispersores e o g\u00e1s n\u00e3o reativo por outros dispersores. Em geral, a quantidade total de g\u00e1s fundente est\u00e1 relacionada \u00e0 quantidade de metal a ser tratado. Tanto a quantidade do g\u00e1s quanto a propor\u00e7\u00e3o de cloro est\u00e3o relacionadas \u00e0s caracter\u00edsticas da sucata a ser fundida; quanto maiores os n\u00edveis de sujeira ou contamina\u00e7\u00e3o, maiores ser\u00e3o as quantidades de g\u00e1s fundente e os teores de cloro nesse g\u00e1s.<\/p>","protected":false},"excerpt":{"rendered":"<p>Degassing with fluxing gas can remove the hydrogen and inclusion in molten aluminum. Referring to the fluxing gases, what is contemplated is that a non-reactive&hellip;<\/p>","protected":false},"author":1,"featured_media":9048,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9047","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>Degassing with Fluxing Gas, Degassing System For Aluminium<\/title>\n<meta name=\"description\" content=\"Degassing with fluxing gas can remove the hydrogen and inclusion in molten aluminum, a mixture of chlorine in argon is quite suitable.\" \/>\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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