{"id":10527,"date":"2021-10-11T07:54:34","date_gmt":"2021-10-11T07:54:34","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10527"},"modified":"2022-03-10T05:22:53","modified_gmt":"2022-03-10T05:22:53","slug":"online-metal-degassing-system","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/online-metal-degassing-system\/","title":{"rendered":"Sistema de desgaseifica\u00e7\u00e3o de metais online"},"content":{"rendered":"

Atualmente, foi instalado um sistema de desgaseifica\u00e7\u00e3o de metal online entre o forno de repouso e a esta\u00e7\u00e3o de fundi\u00e7\u00e3o, com o objetivo de remover impurezas. Muitos sistemas de desgaseifica\u00e7\u00e3o s\u00e3o operados automaticamente, e a remo\u00e7\u00e3o de impurezas \u00e9 muito eficaz e n\u00e3o exige muito esfor\u00e7o.<\/p>\n

Como funciona o dispositivo de desgaseifica\u00e7\u00e3o?<\/strong><\/p>\n

Normalmente, um g\u00e1s inerte, como o arg\u00f4nio, \u00e9 pulverizado no banho de fus\u00e3o por meio de um ou mais bicos rotativos ou dispositivos de pulveriza\u00e7\u00e3o de outros tipos, e as bolhas de arg\u00f4nio pulverizadas devem saturar o alum\u00ednio fundido. Quando o g\u00e1s de processo sobe at\u00e9 a superf\u00edcie do banho de alum\u00ednio, o hidrog\u00eanio dissolvido \u00e9 separado do alum\u00ednio fundido. Adicione-se uma pequena quantidade de g\u00e1s cloro, geralmente 0,5% do g\u00e1s total, para romper a liga\u00e7\u00e3o entre o alum\u00ednio e quaisquer inclus\u00f5es n\u00e3o umectantes, de modo que as bolhas que sobem e as inclus\u00f5es se unam e flutuem at\u00e9 a superf\u00edcie da solu\u00e7\u00e3o.<\/p>\n

O g\u00e1s cloro adicional pode reagir quimicamente com o metal alcalino presente na massa fundida de alum\u00ednio, formar sais de cloreto e flutuar na superf\u00edcie, formando cinzas de alum\u00ednio, que s\u00e3o ent\u00e3o removidas do dispositivo de desgaseifica\u00e7\u00e3o.<\/p>\n

\"\"<\/p>\n

Desempenho do sistema de desgaseifica\u00e7\u00e3o de metais online<\/strong><\/p>\n

A desgaseifica\u00e7\u00e3o eficaz depende da capacidade do metal em linha sistema de desgaseifica\u00e7\u00e3o<\/a>, ou seja, saturar completamente o alum\u00ednio fundido. Fazer com que as pequenas bolhas permane\u00e7am no banho de alum\u00ednio pelo maior tempo poss\u00edvel, de modo que a superf\u00edcie do banho de alum\u00ednio fundido fique calma, sem turbul\u00eancia, e que as inclus\u00f5es e o sal flutuem at\u00e9 a superf\u00edcie do banho de alum\u00ednio.<\/p>\n

O projeto do bico do rotor, a vaz\u00e3o do g\u00e1s e a geometria do banho de fus\u00e3o s\u00e3o fatores essenciais para se obter o melhor efeito de desgaseifica\u00e7\u00e3o.<\/p>\n

O dispositivo de pulveriza\u00e7\u00e3o deve pulverizar g\u00e1s de processo em quantidade suficiente para cobrir todo o banho de fus\u00e3o, desde que isso n\u00e3o cause turbul\u00eancia. Uma velocidade excessiva do rotor e a aus\u00eancia de um defletor adequado podem causar turbul\u00eancia na \u00e1gua de alum\u00ednio e fazer com que o hidrog\u00eanio e as cinzas de alum\u00ednio sejam remisturados ao alum\u00ednio fundido.<\/p>\n

O tempo de rea\u00e7\u00e3o adequado da bolha no c\u00e2mara de desgaseifica\u00e7\u00e3o<\/a> \u00e9 outro par\u00e2metro importante do processo para uma desgaseifica\u00e7\u00e3o eficaz. O c\u00e1lculo do tempo de perman\u00eancia das bolhas no banho de metal fundido, bem como a vaz\u00e3o da \u00e1gua de alum\u00ednio, s\u00e3o fatores a serem considerados na escolha de um dispositivo de desgaseifica\u00e7\u00e3o. Um banho de metal fundido mais profundo tamb\u00e9m afeta objetivamente o desempenho da desgaseifica\u00e7\u00e3o. Quanto mais profundamente o g\u00e1s for injetado no metal fundido, mais tempo levar\u00e1 para que as bolhas subam at\u00e9 a superf\u00edcie do alum\u00ednio fundido e maior ser\u00e1 o tempo de perman\u00eancia das bolhas.<\/p>","protected":false},"excerpt":{"rendered":"

Now an online metal degassing system has been installed between the standing furnace and the casting station, so as to remove impurities. Many degassing systems…<\/p>","protected":false},"author":1,"featured_media":10530,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-10527","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-degassing-unit"],"yoast_head":"\nOnline Metal Degassing System -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Now an online metal degassing system has been installed between the standing furnace and the casting station, so as to remove impurities.\" \/>\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\/online-metal-degassing-system\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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