{"id":2561,"date":"2020-07-02T10:27:20","date_gmt":"2020-07-02T10:27:20","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=2561"},"modified":"2020-09-28T05:42:03","modified_gmt":"2020-09-28T05:42:03","slug":"casting-purification","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/casting-purification\/","title":{"rendered":"Purifica\u00e7\u00e3o por fundi\u00e7\u00e3o"},"content":{"rendered":"<p>O alum\u00ednio l\u00edquido que a barra de alum\u00ednio 6061 retira da c\u00e9lula eletrol\u00edtica cont\u00e9m diversas impurezas, por isso precisa ser purificado antes da fundi\u00e7\u00e3o. Na ind\u00fastria, s\u00e3o utilizados principalmente m\u00e9todos de purifica\u00e7\u00e3o de fundi\u00e7\u00e3o, como clarifica\u00e7\u00e3o, fluxo e g\u00e1s, al\u00e9m de m\u00e9todos de solidifica\u00e7\u00e3o direcional e filtra\u00e7\u00e3o.<\/p>\n<p><strong>Tecnologia de purifica\u00e7\u00e3o na fundi\u00e7\u00e3o de barras de alum\u00ednio<\/strong><\/p>\n<p>A purifica\u00e7\u00e3o do fluxo consiste em utilizar o\u00a0<a href=\"http:\/\/www.alalloycasting.com\/pt\/fluxes\/\">fluxos<\/a>\u00a0adicionado ao alum\u00ednio l\u00edquido para formar um grande n\u00famero de got\u00edculas finas, de modo que os \u00f3xidos presentes no alum\u00ednio l\u00edquido sejam umedecidos, adsorvidos e dissolvidos por essas got\u00edculas, formando novas got\u00edculas na superf\u00edcie; ap\u00f3s o resfriamento, a esc\u00f3ria \u00e9 removida. O fundente utilizado para a purifica\u00e7\u00e3o \u00e9 composto por sais com baixos pontos de fus\u00e3o, baixa densidade, baixa tens\u00e3o superficial, alta atividade e forte capacidade de adsor\u00e7\u00e3o de esc\u00f3ria oxidada. Ao utiliz\u00e1-lo, coloque primeiro um pequeno peda\u00e7o de fundente na gaiola de ferro e, em seguida, insira-a no fundo do forno de mistura para agitar para frente e para tr\u00e1s. Ap\u00f3s o t\u00e9rmino da a\u00e7\u00e3o do fluxo, retire a gaiola de ferro e deixe descansar por 5 a 10 minutos. Remova a esc\u00f3ria superficial para a fundi\u00e7\u00e3o. O fluxo tamb\u00e9m pode ser retirado da superf\u00edcie, conforme necess\u00e1rio, para cobri-la.<\/p>\n<p><strong>M\u00e9todo de purifica\u00e7\u00e3o de barras de alum\u00ednio fundidas<\/strong><\/p>\n<p>A purifica\u00e7\u00e3o por g\u00e1s \u00e9 um dos principais m\u00e9todos de purifica\u00e7\u00e3o das barras de alum\u00ednio 6061. O g\u00e1s utilizado \u00e9 o cloro, o nitrog\u00eanio ou uma mistura de cloro e nitrog\u00eanio.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5190\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/07\/Casting-Purification.jpg\" alt=\"Purifica\u00e7\u00e3o por fundi\u00e7\u00e3o\" width=\"400\" height=\"320\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/07\/Casting-Purification.jpg 400w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/07\/Casting-Purification-300x240.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>(1) Purifica\u00e7\u00e3o do g\u00e1s cloro. Anteriormente, o g\u00e1s cloro ativo era utilizado como agente de limpeza (m\u00e9todo de clora\u00e7\u00e3o). No m\u00e9todo de clora\u00e7\u00e3o, quando o g\u00e1s cloro \u00e9 introduzido no alum\u00ednio l\u00edquido, gera-se uma grande quantidade de AlCl\u2083 com tamanho anormalmente pequeno, e as bolhas se misturam suficientemente no alum\u00ednio l\u00edquido. O hidrog\u00eanio dissolvido no alum\u00ednio l\u00edquido e algumas inclus\u00f5es mec\u00e2nicas s\u00e3o adsorvidos nas bolhas de AlCl\u2083 e s\u00e3o eliminados \u00e0 medida que as bolhas de AlCl\u2083 sobem \u00e0 superf\u00edcie do alum\u00ednio l\u00edquido. O g\u00e1s cloro tamb\u00e9m pode clorar alguns elementos que s\u00e3o mais negativos do que as barras de alum\u00ednio 6061. Por exemplo, c\u00e1lcio, s\u00f3dio, magn\u00e9sio etc. podem ser separados pela forma\u00e7\u00e3o do cloreto correspondente devido ao g\u00e1s cloro. Portanto, o m\u00e9todo de clora\u00e7\u00e3o \u00e9 um m\u00e9todo muito eficaz de purifica\u00e7\u00e3o do alum\u00ednio prim\u00e1rio. A quantidade de g\u00e1s cloro \u00e9 de 500 a 700 g por tonelada de alum\u00ednio. Por\u00e9m, como o oxig\u00eanio \u00e9 t\u00f3xico e relativamente caro, a fim de evitar a polui\u00e7\u00e3o do ar e reduzir o custo da produ\u00e7\u00e3o de lingotes de alum\u00ednio, o m\u00e9todo de clora\u00e7\u00e3o vem sendo gradualmente eliminado na ind\u00fastria moderna do alum\u00ednio e substitu\u00eddo por um m\u00e9todo de purifica\u00e7\u00e3o com g\u00e1s inerte \u2014 o nitrog\u00eanio.<\/p>\n<p>(2) M\u00e9todo de purifica\u00e7\u00e3o com nitrog\u00eanio. Tamb\u00e9m conhecido como m\u00e9todo de purifica\u00e7\u00e3o cont\u00ednua sem fuma\u00e7a, utiliza esferas de alumina (418 mm) como meio filtrante. O N\u2082 passa diretamente para o alum\u00ednio fundido. O alum\u00ednio l\u00edquido \u00e9 alimentado continuamente no forno de purifica\u00e7\u00e3o, passa pela camada filtrante de esferas de alumina e \u00e9 lavado com nitrog\u00eanio, de modo que as inclus\u00f5es n\u00e3o met\u00e1licas e o hidrog\u00eanio dissolvido no alum\u00ednio l\u00edquido s\u00e3o removidos e, em seguida, descarregados continuamente, fazendo com que as finas bolhas de nitrog\u00eanio se distribuam uniformemente, desempenhando o papel de purifica\u00e7\u00e3o no alum\u00ednio l\u00edquido tratado. O nitrog\u00eanio n\u00e3o polui a atmosfera e possui grande capacidade de purifica\u00e7\u00e3o. Ele pode processar de 200 a 600 kg de alum\u00ednio l\u00edquido por minuto. A perda de alum\u00ednio causada pelo processo de purifica\u00e7\u00e3o \u00e9 relativamente reduzida, por isso \u00e9 amplamente utilizado atualmente. No entanto, ao contr\u00e1rio do g\u00e1s cloro, ele n\u00e3o consegue remover c\u00e1lcio, s\u00f3dio e magn\u00e9sio do alum\u00ednio l\u00edquido.<\/p>\n<p>(3) M\u00e9todo de purifica\u00e7\u00e3o com g\u00e1s misto. Utiliza-se uma mistura de cloro e nitrog\u00eanio para purificar o alum\u00ednio l\u00edquido. A barra de alum\u00ednio 6061 tem a fun\u00e7\u00e3o, por um lado, de remover o hidrog\u00eanio e os \u00f3xidos e, por outro, de remover certas impurezas met\u00e1licas (como o magn\u00e9sio) presentes no alum\u00ednio. A composi\u00e7\u00e3o comum \u00e9 90% de nitrog\u00eanio + 10 % de cloro. Tamb\u00e9m existe a composi\u00e7\u00e3o de 10% de cloro + 10% de di\u00f3xido de carbono + 80% de nitrog\u00eanio. Esse m\u00e9todo apresenta melhores resultados, pois o di\u00f3xido de carbono facilita a difus\u00e3o do cloro e do nitrog\u00eanio e reduz o tempo de opera\u00e7\u00e3o.<\/p>","protected":false},"excerpt":{"rendered":"<p>The aluminum liquid that 6061 aluminum rod sucks out from the electrolytic cell contains various impurities, so it needs to be purified before casting. In&hellip;<\/p>","protected":false},"author":1,"featured_media":5191,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[741,740,734,724,738,712,720,735,725,737,736,728,727,726,733,739,713,701,704,692,708,707,710,719,711,729,731,693,730,716,714,723,722,721,700,696,702,703,715,695,694,697,698,706,699,732,705,717,718,709],"class_list":["post-2561","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-aluminium-casting-company-flux-purification","tag-aluminium-die-casting-companies-flux-purification","tag-aluminium-gravity-die-casting-flux-purification","tag-aluminium-hot-top-flux-purification","tag-aluminium-investment-casting-flux-purification","tag-aluminium-strip-flux-purification","tag-aluminum-billet-casting-flux-purification","tag-aluminum-can-foundry-flux-purification","tag-aluminum-casting-companies-flux-purification","tag-aluminum-casting-equipment-flux-purification","tag-aluminum-casting-grain-flux-purification","tag-aluminum-casting-near-me-flux-purification","tag-aluminum-die-casting-companies-flux-purification","tag-aluminum-foundry-near-me-flux-purification","tag-aluminum-gravity-casting-flux-purification","tag-aluminum-gravity-die-casting-flux-purification","tag-aluminum-ingot-flux-purification","tag-aluminum-metallurgy-flux-purification","tag-aluminum-or-aluminium-flux-purification","tag-aluminum-rod-casting-purification-technology","tag-cast-aluminum-flux-purification","tag-castable-refractory-flux-purification","tag-ceramic-insulation-flux-purification","tag-ceramic-shell-casting-flux-purification","tag-continuous-casting-flux-purification","tag-die-casting-companies-near-me-flux-purification","tag-electric-aluminum-foundry-flux-purification","tag-flux-purification","tag-foundry-aluminum-casting-flux-purification","tag-foundry-factory-flux-purification","tag-foundry-flux-purification","tag-hot-top-aluminium-flux-purification","tag-hot-top-cast-flux-purification","tag-hot-top-casting-flux-purification","tag-liquid-aluminum-flux-purification","tag-materials-and-metallurgy-flux-purification","tag-melting-aluminum-flux-purification","tag-melting-point-of-aluminum-flux-purification","tag-metal-foundry-flux-purification","tag-metal-metallurgy-flux-purification","tag-metallurgical-engineering-flux-purification","tag-metallurgical-industry-flux-purification","tag-metallurgical-products-flux-purification","tag-metallurgy-company-flux-purification","tag-metallurgy-of-aluminium-flux-purification","tag-molten-aluminum-casting-flux-purification","tag-molten-aluminum-flux-purification","tag-shell-casting-flux-purification","tag-shell-mould-casting-flux-purification","tag-what-is-flux-purification"],"yoast_head":"<!-- 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barras de alum\u00ednio","description":"Na ind\u00fastria, utilizam-se principalmente m\u00e9todos de purifica\u00e7\u00e3o de fundi\u00e7\u00e3o, como clarifica\u00e7\u00e3o, fluxo e g\u00e1s, al\u00e9m de m\u00e9todos de filtra\u00e7\u00e3o.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.alalloycasting.com\/pt\/casting-purification\/","og_locale":"pt_BR","og_type":"article","og_title":"Casting Purification Technology | Flux Purification for Aluminum Rod","og_description":"In industry, casting purification methods such as clarification, flux, and gas are mainly used, and filtration methods are also 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