{"id":8611,"date":"2021-04-28T09:06:57","date_gmt":"2021-04-28T09:06:57","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8611"},"modified":"2021-04-28T09:06:57","modified_gmt":"2021-04-28T09:06:57","slug":"aluminum-melt-degassing","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/aluminum-melt-degassing\/","title":{"rendered":"Desgaseifica\u00e7\u00e3o do alum\u00ednio fundido"},"content":{"rendered":"

O processo de desgaseifica\u00e7\u00e3o da liga de alum\u00ednio fundida consiste em injetar nitrog\u00eanio na liga de alum\u00ednio fundida, para que este seja comprimido pelo rotor girat\u00f3rio de nitreto de sil\u00edcio, formando um grande n\u00famero de bolhas de difus\u00e3o, de modo que a liga de alum\u00ednio l\u00edquida e o nitrog\u00eanio entrem em contato total dentro do tanque de processamento.<\/p>\n

De acordo com o princ\u00edpio da diferen\u00e7a de press\u00e3o e da adsor\u00e7\u00e3o superficial, as bolhas absorvem o hidrog\u00eanio presente na massa fundida e adsorvem a esc\u00f3ria oxidada. A esc\u00f3ria se forma na superf\u00edcie da massa fundida. O metal fundido da liga de alum\u00ednio flui da sa\u00edda do dispositivo de desgaseifica\u00e7\u00e3o (localizado na parte inferior do recipiente) para a m\u00e1quina de fundi\u00e7\u00e3o. O metal fundido da liga de alum\u00ednio entra continuamente no dispositivo de desgaseifica\u00e7\u00e3o, e o nitrog\u00eanio \u00e9 injetado continuamente. Por meio do processo de desgaseifica\u00e7\u00e3o, alcan\u00e7a-se o objetivo de purificar o metal fundido da liga de alum\u00ednio.<\/p>\n

A liga de alum\u00ednio \u00e9 o material estrutural de metal n\u00e3o ferroso mais utilizado na ind\u00fastria. \u00c9 amplamente empregada nos setores de avia\u00e7\u00e3o, aeroespacial, automotivo, fabrica\u00e7\u00e3o de m\u00e1quinas, constru\u00e7\u00e3o naval, ind\u00fastria qu\u00edmica e outros. Com o r\u00e1pido desenvolvimento da economia industrial, a demanda por liga de alum\u00ednio continua a aumentar. O hidrog\u00eanio \u00e9 dissolvido no material fundido, difunde-se nas bolhas ascendentes de g\u00e1s fundido e \u00e9 transportado para a superf\u00edcie do material fundido. O g\u00e1s e as inclus\u00f5es afetam o produto de alum\u00ednio. O processo de desgaseifica\u00e7\u00e3o do alum\u00ednio fundido \u00e9 essencial para remover o hidrog\u00eanio dissolvido e os componentes n\u00e3o met\u00e1licos do metal fundido antes da fundi\u00e7\u00e3o, a fim de obter a melhor qualidade.<\/p>\n

\"Desgaseifica\u00e7\u00e3o<\/p>\n

Estrutura principal da unidade de desgaseifica\u00e7\u00e3o de alum\u00ednio fundido<\/h2>\n

Mecanismo de eleva\u00e7\u00e3o hidr\u00e1ulico<\/strong><\/p>\n

Para garantir seu posicionamento preciso, o unidade de desgaseifica\u00e7\u00e3o de alum\u00ednio fundido<\/a> possui um dispositivo de eleva\u00e7\u00e3o hidr\u00e1ulico, utilizado para controlar o movimento vertical do rotor de nitreto de sil\u00edcio e do sistema de aquecimento com haste em forma de U de carboneto de sil\u00edcio, que pode ser girado 90\u00b0 na horizontal. O sistema hidr\u00e1ulico apresenta uma precis\u00e3o de posicionamento relativamente est\u00e1vel.<\/p>\n

Sistema de aquecimento<\/strong><\/p>\n

O sistema de aquecimento utiliza um aquecedor el\u00e9trico, e a haste de carboneto de sil\u00edcio em forma de U envolve o tubo protetor cil\u00edndrico de carboneto de sil\u00edcio ou nitreto de sil\u00edcio. H\u00e1 um termopar para medi\u00e7\u00e3o de temperatura dentro do tubo, o que permite o controle autom\u00e1tico da temperatura, e a pot\u00eancia pode ser ajustada livremente na faixa de 2 kW a 26 kW.<\/p>\n

O sistema de controle de temperatura utiliza uma unidade integrada de pot\u00eancia mais avan\u00e7ada para proporcionar um controle totalmente autom\u00e1tico, evitando assim o inc\u00f4modo causado pela falta de amortecimento ao ligar e desligar o aquecedor.
\nOs aquecedores de haste em forma de U de carboneto de sil\u00edcio costumam ser afetados pela corrente principal durante processos frequentes de ligar e desligar.<\/p>\n

O aquecedor no est\u00e1gio sem reservat\u00f3rio tamp\u00e3o envelhece facilmente e tem vida \u00fatil curta.<\/p>","protected":false},"excerpt":{"rendered":"

Aluminum Melt Degassing uses the nitrogen blown into the aluminum alloy melt to be crushed by the rotating silicon nitride rotor, forming a large number…<\/p>","protected":false},"author":1,"featured_media":8612,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8611","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nAluminum Melt Degassing with Nitrogen Used for Foundry<\/title>\n<meta name=\"description\" content=\"The aluminum melt degassing process is essential to remove dissolved hydrogen and non-metallic content from molten metal.\" \/>\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\/aluminum-melt-degassing\/\" \/>\n<meta property=\"og:locale\" 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