{"id":4026,"date":"2020-08-23T03:00:45","date_gmt":"2020-08-23T03:00:45","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4026"},"modified":"2020-08-23T03:00:45","modified_gmt":"2020-08-23T03:00:45","slug":"molten-aluminum-refining","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/molten-aluminum-refining\/","title":{"rendered":"Refinamento de alum\u00ednio fundido"},"content":{"rendered":"

Durante o refino do alum\u00ednio fundido, os \u00e1tomos de hidrog\u00eanio dissolvidos no alum\u00ednio fundido migram para a periferia da bolha de refino (Ar ou N), s\u00e3o adsorvidos ao redor da bolha, combinam-se com mol\u00e9culas de hidrog\u00eanio dentro da bolha e, por fim, flutuam junto com a espuma. Esse \u00e9 o processo din\u00e2mico do fluido de vazamento do alum\u00ednio. Trata-se de um processo no qual o hidrog\u00eanio se difunde na fase l\u00edquida e \u00e9 absorvido pelas bolhas.<\/p>\n

Refinamento de alum\u00ednio fundido<\/h2>\n

No processo de fus\u00e3o da liga de alum\u00ednio, fluxo de refino<\/a> \u00e9 adicionado \u00e0 massa fundida para remover inclus\u00f5es de \u00f3xido por meio de uma s\u00e9rie de a\u00e7\u00f5es f\u00edsicas e qu\u00edmicas. A capacidade do clarificador de remover impurezas depende da adsor\u00e7\u00e3o e dissolu\u00e7\u00e3o do clarificador nas inclus\u00f5es de \u00f3xido na massa fundida, bem como da a\u00e7\u00e3o qu\u00edmica do clarificador na massa fundida. Quanto menor for a tens\u00e3o interfacial entre o fluxo de refino e a inclus\u00e3o de \u00f3xido, melhor ser\u00e1 o efeito de adsor\u00e7\u00e3o e mais eficaz ser\u00e1 a remo\u00e7\u00e3o da inclus\u00e3o de \u00f3xido.<\/p>\n

O fluxo de refino da AdTech utiliza o princ\u00edpio da combina\u00e7\u00e3o de compostos de metal fundido na pesquisa, no desenvolvimento e na configura\u00e7\u00e3o do produto. Reduz a fuma\u00e7a e minimiza o desperd\u00edcio decorrente da queima, o que protege o meio ambiente de forma econ\u00f4mica.<\/p>\n

\"Refinamento<\/p>\n

Os m\u00e9todos para aumentar a velocidade de refina\u00e7\u00e3o do alum\u00ednio fundido s\u00e3o os seguintes:<\/p>\n

(1) Aumentar ao m\u00e1ximo o n\u00famero de bolhas e ampliar a \u00e1rea de contato efetiva entre o alum\u00ednio fundido e as bolhas.<\/p>\n

(2) O di\u00e2metro das bolhas deve ser reduzido ao m\u00e1ximo, e a velocidade de deslocamento das bolhas no alum\u00ednio fundido deve ser aumentada, sem causar respingos na superf\u00edcie do alum\u00ednio fundido.<\/p>\n

(3) Isso pode reduzir efetivamente a dist\u00e2ncia de difus\u00e3o do hidrog\u00eanio dissolvido no alum\u00ednio fundido, o que equivale a melhorar o processo de difus\u00e3o ou a capacidade de transfer\u00eancia de massa.<\/p>\n

(4) A dist\u00e2ncia de flutua\u00e7\u00e3o das bolhas no alum\u00ednio fundido deve ser aumentada ao m\u00e1ximo, a fim de prolongar o tempo de perman\u00eancia das bolhas no alum\u00ednio fundido.<\/p>\n

(5) Ao utilizar g\u00e1s inerte de alta pureza, g\u00e1s reativo insol\u00favel no alum\u00ednio fundido ou refino a v\u00e1cuo, a concentra\u00e7\u00e3o de hidrog\u00eanio na interface entre a bolha e o l\u00edquido no alum\u00ednio fundido tende a zero.<\/p>","protected":false},"excerpt":{"rendered":"

During molten aluminum refining, the hydrogen atoms dissolved in molten aluminum migrate to the periphery of the refining bubble (Ar or N) and adsorb around…<\/p>","protected":false},"author":1,"featured_media":4028,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-4026","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nMolten Aluminum Refining Methods to Improve the Refining Speed<\/title>\n<meta name=\"description\" content=\"Molten Aluminum Refining Methods to Improve the Refining Speed: Increase the number of bubbles and the effective contact surface area.\" \/>\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\/molten-aluminum-refining\/\" \/>\n<meta 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