{"id":5337,"date":"2020-09-30T06:19:57","date_gmt":"2020-09-30T06:19:57","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5337"},"modified":"2020-09-30T06:19:57","modified_gmt":"2020-09-30T06:19:57","slug":"purification-technology","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/purification-technology\/","title":{"rendered":"Tecnologia de purifica\u00e7\u00e3o"},"content":{"rendered":"<p>Com a expans\u00e3o cont\u00ednua do uso de materiais de liga de alum\u00ednio em diversos setores da economia nacional, exig\u00eancias cada vez mais rigorosas s\u00e3o impostas \u00e0 qualidade interna desses materiais. Durante o processo de produ\u00e7\u00e3o, \u00e9 necess\u00e1rio controlar rigorosamente a composi\u00e7\u00e3o qu\u00edmica da liga de alum\u00ednio e os defeitos, como retra\u00e7\u00e3o, porosidade e inclus\u00f5es de esc\u00f3ria no lingote, pois a qualidade intr\u00ednseca dos produtos processados \u00e9 afetada pela qualidade do lingote, e a qualidade interna do lingote depende em grande parte da qualidade da massa fundida. Portanto, a tecnologia de purifica\u00e7\u00e3o da massa fundida de liga de alum\u00ednio \u00e9 de grande import\u00e2ncia. De acordo com os equipamentos e as condi\u00e7\u00f5es de processo existentes, discute-se o m\u00e9todo de controle do teor de hidrog\u00eanio na massa fundida de alum\u00ednio, com o objetivo de reduzir esse teor e, assim, obter lingotes de alta qualidade.<\/p>\n<h2>Tecnologia de purifica\u00e7\u00e3o de alum\u00ednio<\/h2>\n<p>O g\u00e1s presente no alum\u00ednio fundido \u00e9 composto principalmente por hidrog\u00eanio (a fra\u00e7\u00e3o volum\u00e9trica varia entre cerca de 60% e 90%), seguido por nitrog\u00eanio, oxig\u00eanio, mon\u00f3xido de carbono e outros. As tecnologias de purifica\u00e7\u00e3o do alum\u00ednio fundido destinadas principalmente \u00e0 remo\u00e7\u00e3o de hidrog\u00eanio incluem, entre outras, o m\u00e9todo de flota\u00e7\u00e3o por bolhas, o m\u00e9todo de tratamento a v\u00e1cuo, o m\u00e9todo de tratamento ultrass\u00f4nico e o m\u00e9todo de remo\u00e7\u00e3o de hidrog\u00eanio por terras raras. O m\u00e9todo de flota\u00e7\u00e3o por bolhas \u00e9 amplamente utilizado devido \u00e0 sua simplicidade e alta efici\u00eancia. O processo de remo\u00e7\u00e3o de hidrog\u00eanio por flota\u00e7\u00e3o por bolhas do alum\u00ednio fundido: os \u00e1tomos de hidrog\u00eanio dissolvidos no alum\u00ednio l\u00edquido migram para a periferia das bolhas do agente purificador (arg\u00f4nio ou nitrog\u00eanio, etc.), s\u00e3o adsorvidos ao redor das bolhas e formam mol\u00e9culas de hidrog\u00eanio dentro delas. Por fim, o alum\u00ednio fundido escapa \u00e0 medida que as bolhas flutuam para cima.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5339\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/09\/Purification-Technology-1.jpg\" alt=\"Tecnologia de purifica\u00e7\u00e3o\" width=\"400\" height=\"500\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/09\/Purification-Technology-1.jpg 400w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/09\/Purification-Technology-1-240x300.jpg 240w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>Equipamentos principais: forno de fus\u00e3o, dispositivo de agita\u00e7\u00e3o eletromagn\u00e9tica, dispositivo de desgaseifica\u00e7\u00e3o em linha, dispositivo de filtragem em linha, <a href=\"http:\/\/www.alalloycasting.com\/pt\/metal-transfer-runner-system\/\">sistema de corredi\u00e7as<\/a>. O alum\u00ednio prim\u00e1rio eletrol\u00edtico e os materiais s\u00e3o fundidos e refinados em um forno de fundi\u00e7\u00e3o para se obter uma massa fundida de alum\u00ednio que atenda aos padr\u00f5es de temperatura e composi\u00e7\u00e3o, sendo ent\u00e3o mantida em repouso para tratamento. A massa fundida em repouso \u00e9 posteriormente purificada e moldada ap\u00f3s desgaseifica\u00e7\u00e3o e filtragem em linha por meio de canais de fundi\u00e7\u00e3o.<\/p>\n<p>A solubilidade do alum\u00ednio quando aquecido a 300 \u00b0C ao ar \u00e9 de apenas 0,001 ml\/(100 g\u00b7Al), e o alum\u00ednio s\u00f3lido basicamente n\u00e3o absorve hidrog\u00eanio. Quando o alum\u00ednio fundido entra no sistema de fundi\u00e7\u00e3o, o teor de hidrog\u00eanio basicamente n\u00e3o se altera. Al\u00e9m das mat\u00e9rias-primas, a fonte de hidrog\u00eanio do metal fundido \u00e9 principalmente a absor\u00e7\u00e3o de hidrog\u00eanio durante os processos de fundi\u00e7\u00e3o e moldagem. O objetivo do uso de <a href=\"http:\/\/www.alalloycasting.com\/pt\/degassing-equipment\/\">equipamento de desgaseifica\u00e7\u00e3o<\/a> \u00e9 purificar ainda mais o alum\u00ednio fundido fora do forno e remover mais eficazmente os gases e as esc\u00f3rias presentes no alum\u00ednio fundido.<\/p>","protected":false},"excerpt":{"rendered":"<p>With the continuous expansion of aluminum alloy materials in various fields of the national economy, higher and higher requirements are put forward for the internal&hellip;<\/p>","protected":false},"author":1,"featured_media":5338,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5337","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>Purification Technology for Molten Aluminum | Degassing Equipment<\/title>\n<meta name=\"description\" content=\"Purification technology of the aluminum alloy melt is very important. The online degassing equipment can purify the aluminum melt.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/pt\/purification-technology\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Purification Technology for Molten Aluminum | Degassing Equipment\" \/>\n<meta property=\"og:description\" content=\"Purification technology of the aluminum alloy melt is very important. 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