{"id":4874,"date":"2020-09-17T08:28:48","date_gmt":"2020-09-17T08:28:48","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4874"},"modified":"2020-09-17T08:28:48","modified_gmt":"2020-09-17T08:28:48","slug":"purification-of-aluminum","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/purification-of-aluminum\/","title":{"rendered":"Purifica\u00e7\u00e3o do alum\u00ednio"},"content":{"rendered":"<p>A presen\u00e7a de gases e de diversas inclus\u00f5es na massa fundida faz com que o lingote apresente poros, inclus\u00f5es n\u00e3o met\u00e1licas, pel\u00edcula de \u00f3xido e outros defeitos, os quais afetam significativamente a resist\u00eancia, o desempenho na usinagem, a resist\u00eancia \u00e0 corros\u00e3o, o desempenho na anodiza\u00e7\u00e3o e a qualidade est\u00e9tica do produto. Portanto, a purifica\u00e7\u00e3o do alum\u00ednio fundido \u00e9 fundamental para reduzir o teor de g\u00e1s e as inclus\u00f5es n\u00e3o met\u00e1licas do alum\u00ednio fundido, bem como para melhorar a qualidade dos materiais processados. Existem certas diferen\u00e7as nos requisitos de pureza do alum\u00ednio fundido, dependendo da variedade da liga e da finalidade do produto. Geralmente, exige-se que a solubilidade do hidrog\u00eanio no alum\u00ednio fundido seja inferior a 0,15 ~ 0,2 mL\/100 g e, para alguns produtos com requisitos especiais, deve ser inferior a 0,1 mL\/100 g.<\/p>\n<p>A presen\u00e7a de hidrog\u00eanio e inclus\u00f5es prejudica, direta ou indiretamente, as propriedades do alum\u00ednio e de suas ligas. Portanto, o n\u00edvel de pureza do alum\u00ednio fundido tornou-se o fator-chave para a produ\u00e7\u00e3o de alum\u00ednio de alta qualidade, o que tem promovido o desenvolvimento cont\u00ednuo de <a href=\"http:\/\/www.alalloycasting.com\/pt\/aluminum-purification-technology\/\">tecnologia de purifica\u00e7\u00e3o de alum\u00ednio<\/a> nos \u00faltimos anos.<\/p>\n<p>O m\u00e9todo de purifica\u00e7\u00e3o da liga de alum\u00ednio fundida na fundi\u00e7\u00e3o de tiras de alum\u00ednio pode ser dividido em dois tipos b\u00e1sicos: purifica\u00e7\u00e3o por adsor\u00e7\u00e3o e purifica\u00e7\u00e3o sem adsor\u00e7\u00e3o.<\/p>\n<p>A purifica\u00e7\u00e3o por adsor\u00e7\u00e3o ocorre por meio do contato direto do alum\u00ednio fundido com o adsorvente (como diversos gases, l\u00edquidos, s\u00f3lidos <a href=\"http:\/\/www.alalloycasting.com\/pt\/refining-flux\/\">fluxos de refino<\/a> e <a href=\"http:\/\/www.alalloycasting.com\/pt\/ceramic-foam-filter\/\">filtro de espuma cer\u00e2mica<\/a> (meios de desgaseamento), de modo que o adsorvente e o g\u00e1s presentes na massa fundida e nas inclus\u00f5es de \u00f3xido s\u00f3lido sejam submetidos a a\u00e7\u00f5es f\u00edsicas, qu\u00edmicas, f\u00edsicas ou mec\u00e2nicas para alcan\u00e7ar o objetivo de desgaseamento e remo\u00e7\u00e3o de impurezas. Tais como <a href=\"http:\/\/www.alalloycasting.com\/pt\/rotating-degassing-technology\/\">desgaseamento rotativo<\/a> m\u00e9todo, m\u00e9todo de filtragem CFF, m\u00e9todo de refinamento de fluxo e assim por diante.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-4876\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/09\/Purification-of-Aluminum-2.jpg\" alt=\"Purifica\u00e7\u00e3o do alum\u00ednio\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/09\/Purification-of-Aluminum-2.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/09\/Purification-of-Aluminum-2-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>A purifica\u00e7\u00e3o por n\u00e3o adsor\u00e7\u00e3o refere-se \u00e0 altera\u00e7\u00e3o do estado de equil\u00edbrio do sistema metal-g\u00e1s ou do sistema metal-inclus\u00e3o por meio de alguma a\u00e7\u00e3o f\u00edsica (como v\u00e1cuo, ultrassom, diferen\u00e7a de densidade etc.) sem a adi\u00e7\u00e3o de adsorventes \u00e0 massa fundida, conseguindo assim separar o g\u00e1s ou as inclus\u00f5es s\u00f3lidas da massa fundida de alum\u00ednio. Exemplos incluem o tratamento por repouso, o tratamento a v\u00e1cuo, o tratamento ultrass\u00f4nico, etc.<\/p>\n<p>Portanto, a purifica\u00e7\u00e3o de metais pode ser dividida em tr\u00eas categorias, de acordo com seu princ\u00edpio de a\u00e7\u00e3o: purifica\u00e7\u00e3o por adsor\u00e7\u00e3o, transforma\u00e7\u00e3o f\u00edsica (purifica\u00e7\u00e3o sem adsor\u00e7\u00e3o) e purifica\u00e7\u00e3o por filtra\u00e7\u00e3o. Os m\u00e9todos de purifica\u00e7\u00e3o por fus\u00e3o podem ser divididos em tecnologia de refino por desgaseifica\u00e7\u00e3o, tecnologia de purifica\u00e7\u00e3o por filtra\u00e7\u00e3o CFF e tecnologia de purifica\u00e7\u00e3o composta.<\/p>","protected":false},"excerpt":{"rendered":"<p>The presence of gases and various inclusions in the melt causes the ingot to produce pores, non-metallic inclusions, oxide film and other defects, which affect&hellip;<\/p>","protected":false},"author":1,"featured_media":4875,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[4695],"class_list":["post-4874","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-purification-of-aluminum"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Purification of Aluminum 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