{"id":6341,"date":"2020-11-12T01:29:26","date_gmt":"2020-11-12T01:29:26","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6341"},"modified":"2020-11-12T01:29:26","modified_gmt":"2020-11-12T01:29:26","slug":"fluxes-purification","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/fluxes-purification\/","title":{"rendered":"M\u00e9todo de purifica\u00e7\u00e3o de fluxos"},"content":{"rendered":"<p>Como h\u00e1 muitas impurezas no alum\u00ednio l\u00edquido na c\u00e9lula eletrol\u00edtica, ele deve ser filtrado antes da fundi\u00e7\u00e3o do lingote de alum\u00ednio. Os m\u00e9todos comuns incluem fluxos, gases e m\u00e9todos de purifica\u00e7\u00e3o por clarifica\u00e7\u00e3o. Os principais m\u00e9todos s\u00e3o:<\/p>\n<p><strong>M\u00e9todo de purifica\u00e7\u00e3o de fluxos e m\u00e9todo de purifica\u00e7\u00e3o de g\u00e1s<\/strong><\/p>\n<p>1. O m\u00e9todo de purifica\u00e7\u00e3o por fluxos consiste em utilizar o <a href=\"http:\/\/www.alalloycasting.com\/pt\/refining-flux\/\">fluxo de refino<\/a> adicionado \u00e0 solu\u00e7\u00e3o, que apresenta as caracter\u00edsticas de baixa densidade, alta atividade e forte capacidade de adsor\u00e7\u00e3o. Ao adsorver os \u00f3xidos presentes na solu\u00e7\u00e3o, formam-se novas got\u00edculas que sobem \u00e0 superf\u00edcie. Ap\u00f3s o resfriamento, forma-se uma esc\u00f3ria. O lingote de alum\u00ednio pode ser fundido mediante a remo\u00e7\u00e3o da esc\u00f3ria.<\/p>\n<p>2. A purifica\u00e7\u00e3o por g\u00e1s \u2014 que geralmente utiliza cloro, nitrog\u00eanio ou uma mistura de cloro e nitrog\u00eanio \u2014 \u00e9 um dos principais m\u00e9todos de purifica\u00e7\u00e3o do alum\u00ednio prim\u00e1rio.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6343\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/11\/Fluxes-Purification-1.jpg\" alt=\"Purifica\u00e7\u00e3o de fluxos\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/11\/Fluxes-Purification-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/11\/Fluxes-Purification-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p><strong>Purifica\u00e7\u00e3o com cloro<\/strong><\/p>\n<p>O g\u00e1s cloro presente no alum\u00ednio fundido gera muitas pequenas bolhas, que se misturam completamente ao alum\u00ednio fundido; o hidrog\u00eanio dissolvido nele, bem como algumas inclus\u00f5es mec\u00e2nicas, podem ser adsorvidos nessas pequenas bolhas. \u00c0 medida que as bolhas sobem at\u00e9 a superf\u00edcie do alum\u00ednio fundido, elas s\u00e3o eliminadas.<\/p>\n<p><strong>M\u00e9todo de purifica\u00e7\u00e3o de nitrog\u00eanio<\/strong><\/p>\n<p>Como o cloro \u00e9 t\u00f3xico e caro, surgiu a purifica\u00e7\u00e3o com nitrog\u00eanio. Utilizam-se esferas de alumina como meio filtrante. O N\u2082 \u00e9 introduzido diretamente no alum\u00ednio fundido. O alum\u00ednio fundido \u00e9 alimentado continuamente no forno de purifica\u00e7\u00e3o, passa pela camada de filtro 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 fundido s\u00e3o removidos; em seguida, \u00e9 descarregado continuamente, de forma que as finas bolhas de nitrog\u00eanio sejam distribu\u00eddas uniformemente, exercendo um efeito purificador no alum\u00ednio l\u00edquido tratado.<\/p>\n<p><strong>M\u00e9todo de purifica\u00e7\u00e3o de g\u00e1s misto<\/strong><\/p>\n<p>Uma mistura de cloro e nitrog\u00eanio \u00e9 utilizada para purificar o alum\u00ednio fundido. Sua fun\u00e7\u00e3o \u00e9, por um lado, remover o hidrog\u00eanio e separar os \u00f3xidos e, por outro, remover certas impurezas met\u00e1licas (como o magn\u00e9sio) do alum\u00ednio. A composi\u00e7\u00e3o comumente utilizada \u00e9 90% de nitrog\u00eanio + 10% de cloro. Tamb\u00e9m existe a composi\u00e7\u00e3o 10% de cloro + 10% de di\u00f3xido de carbono + 80% de nitrog\u00eanio. Esse efeito \u00e9 melhor, pois o di\u00f3xido de carbono difunde bem o cloro e o nitrog\u00eanio, o que pode reduzir o tempo de opera\u00e7\u00e3o.<\/p>","protected":false},"excerpt":{"rendered":"<p>Because there are many impurities in the aluminum liquid in the electrolytic cell, it must be filtered before casting the aluminum ingot. Common methods include&hellip;<\/p>","protected":false},"author":1,"featured_media":6342,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[240,6441],"class_list":["post-6341","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-flux-refining","tag-fluxes-purification"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fluxes Purification Method for Molten Metal Refining<\/title>\n<meta name=\"description\" content=\"The fluxes purification method is to add the refining flux to molten metal, which has the high activity, and strong adsorption capacity.\" \/>\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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