{"id":11178,"date":"2021-11-12T08:16:20","date_gmt":"2021-11-12T08:16:20","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11178"},"modified":"2021-11-12T08:16:20","modified_gmt":"2021-11-12T08:16:20","slug":"gas-purification-for-aluminum","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/gas-purification-for-aluminum\/","title":{"rendered":"Purifica\u00e7\u00e3o de g\u00e1s para alum\u00ednio"},"content":{"rendered":"<p>A purifica\u00e7\u00e3o por purificador de g\u00e1s refere-se \u00e0 introdu\u00e7\u00e3o de g\u00e1s na massa fundida de alum\u00ednio ou de subst\u00e2ncias capazes de produzir g\u00e1s purificado. A diferen\u00e7a de press\u00e3o parcial entre o hidrog\u00eanio no alum\u00ednio fundido e a bolha \u00e9 utilizada para fazer com que ele se difunda para dentro da bolha, e a bolha captura as impurezas inclu\u00eddas no processo de flutua\u00e7\u00e3o, de modo a alcan\u00e7ar o objetivo de remo\u00e7\u00e3o do hidrog\u00eanio e das impurezas. O principal objetivo dos purificadores a g\u00e1s \u00e9 remover o hidrog\u00eanio. Ao mesmo tempo, como as impurezas no metal fundido interagem com o hidrog\u00eanio, o processo de remo\u00e7\u00e3o do hidrog\u00eanio \u00e9 acompanhado pela remo\u00e7\u00e3o das impurezas.<\/p>\n<p>O <a href=\"http:\/\/www.alalloycasting.com\/pt\/molten-aluminum-purification\/\">purifica\u00e7\u00e3o do alum\u00ednio<\/a> O funcionamento do purificador de g\u00e1s baseia-se na teoria da flota\u00e7\u00e3o por bolhas. De acordo com a classifica\u00e7\u00e3o por atividade dos purificadores de g\u00e1s, eles podem ser divididos em tr\u00eas categorias: g\u00e1s inerte, g\u00e1s ativo e g\u00e1s oxidante.<\/p>\n<p>Por g\u00e1s inerte entende-se o g\u00e1s que n\u00e3o reage quimicamente com o alum\u00ednio fundido e com o hidrog\u00eanio dissolvido, sendo insol\u00favel no alum\u00ednio; trata-se principalmente de Ar, N\u2082, He, etc. Esses gases s\u00e3o at\u00f3xicos, ins\u00edpidos e n\u00e3o poluentes, n\u00e3o exigem instala\u00e7\u00f5es de tratamento de gases residuais e s\u00e3o capazes de adsorver fisicamente e remover o hidrog\u00eanio do alum\u00ednio fundido.<\/p>\n<p>O g\u00e1s ativo refere-se principalmente ao Cl\u2082, al\u00e9m do ZnCl, MnCl, C\u2082Cl\u2086, CCl\u2084 e outros sais de cloro ou cloretos produzidos no processo de purifica\u00e7\u00e3o. O Cl\u2082 em si \u00e9 insol\u00favel no alum\u00ednio, mas o g\u00e1s cloro reage com o alum\u00ednio e com o hidrog\u00eanio dissolvido no alum\u00ednio. Os produtos da rea\u00e7\u00e3o, HCl e AlCl\u2083, s\u00e3o ambos gasosos e insol\u00faveis no alum\u00ednio fundido. Inicialmente, a press\u00e3o parcial de hidrog\u00eanio na bolha de AlCl\u2083 \u00e9 zero, removendo assim o hidrog\u00eanio da massa fundida. O g\u00e1s ativo exerce efeitos f\u00edsicos e qu\u00edmicos de remo\u00e7\u00e3o de hidrog\u00eanio na massa fundida de alum\u00ednio. No entanto, por ser prejudicial ao corpo humano, poluir o meio ambiente, corroer facilmente os equipamentos e elementos de aquecimento e tornar a estrutura cristalina do lingote de liga mais grosseira, utiliza-se predominantemente g\u00e1s inerte para evitar riscos \u00e0 popula\u00e7\u00e3o.<\/p>\n<p>O g\u00e1s oxidante refere-se ao g\u00e1s gerado pela decomposi\u00e7\u00e3o do fundente sob a a\u00e7\u00e3o de alta temperatura ou pela rea\u00e7\u00e3o com o alum\u00ednio fundido, o que constitui um m\u00e9todo de fundente recentemente desenvolvido. No entanto, como ele gera gases como NO, NO\u2082, CO e HF, esses gases podem oxidar violentamente o alum\u00ednio fundido durante o processo de purifica\u00e7\u00e3o.<\/p>","protected":false},"excerpt":{"rendered":"<p>Gas purifier purification refers to the introduction of gas into the aluminum melt or the substances that can produce purified gas. The partial pressure difference&hellip;<\/p>","protected":false},"author":1,"featured_media":11182,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12802,4672],"class_list":["post-11178","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-degassing-with-inert-gas","tag-gas-purification-for-aluminum"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Gas Purification for Aluminum, Degassing with Inert Gas<\/title>\n<meta name=\"description\" content=\"Gas purifier purification refers to the introduction of gas into the aluminum melt or the substances that can produce purified gas.\" \/>\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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