{"id":9838,"date":"2021-08-10T08:12:40","date_gmt":"2021-08-10T08:12:40","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9838"},"modified":"2021-08-10T08:12:40","modified_gmt":"2021-08-10T08:12:40","slug":"aluminum-degassing-box","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/aluminum-degassing-box\/","title":{"rendered":"Caixa de desgaseifica\u00e7\u00e3o de alum\u00ednio"},"content":{"rendered":"

Com o r\u00e1pido desenvolvimento da tecnologia de processamento do alum\u00ednio, os requisitos de qualidade para os produtos de alum\u00ednio est\u00e3o se tornando cada vez mais exigentes. A quest\u00e3o de como purificar melhor o alum\u00ednio l\u00edquido e eliminar os defeitos internos dos produtos de alum\u00ednio tem recebido aten\u00e7\u00e3o generalizada da ind\u00fastria de processamento de alum\u00ednio em v\u00e1rios pa\u00edses. A pr\u00e1tica industrial mostra que o m\u00e9todo de flota\u00e7\u00e3o por bolhas \u00e9, atualmente, um dos m\u00e9todos mais eficazes para purificar o alum\u00ednio fundido. Ele utiliza um bico rotativo (rotor de grafite) para injetar g\u00e1s inerte no alum\u00ednio l\u00edquido. O equipamento-chave para o m\u00e9todo de flota\u00e7\u00e3o por bolhas na purifica\u00e7\u00e3o do alum\u00ednio fundido \u00e9 o unidade de desgaseifica\u00e7\u00e3o<\/a>, e o rotor de grafite \u00e9 a principal pe\u00e7a de desgaste da caixa de desgaseifica\u00e7\u00e3o de alum\u00ednio.<\/p>\n

Quando a caixa de desgaseifica\u00e7\u00e3o de alum\u00ednio fundido est\u00e1 em funcionamento, o rotor de grafite gira a uma velocidade constante de 200 a 300 r\/min, e o g\u00e1s, com determinada press\u00e3o e vaz\u00e3o, \u00e9 introduzido pela parte superior da coluna do rotor e injetado pelos poros ao redor da cabe\u00e7a do rotor atrav\u00e9s do canal de g\u00e1s no interior da coluna do rotor. No alum\u00ednio l\u00edquido dentro do tanque de desgaseifica\u00e7\u00e3o, as bolhas s\u00e3o continuamente expelidas. Quando as p\u00e1s da cabe\u00e7a do rotor est\u00e3o girando, elas desempenham a dupla fun\u00e7\u00e3o de agitar o alum\u00ednio fundido e reduzir o tamanho das bolhas, fazendo com que um grande n\u00famero de pequenas bolhas suba no alum\u00ednio fundido ao longo de uma trajet\u00f3ria espiral at\u00e9 que escapem da superf\u00edcie do alum\u00ednio fundido, completando assim o processo de desgaseifica\u00e7\u00e3o e purifica\u00e7\u00e3o. Obviamente, esse processo de purifica\u00e7\u00e3o imp\u00f5e requisitos mais rigorosos ao material de grafite utilizado na fabrica\u00e7\u00e3o do rotor.<\/p>\n

O rotor de grafite gira em altas temperaturas e fica incandescente. Ao mesmo tempo, ele est\u00e1 sujeito aos efeitos combinados da oxida\u00e7\u00e3o por alta temperatura e da eros\u00e3o causada pelo alum\u00ednio fundido, sendo gradualmente desgastado, especialmente na regi\u00e3o que entra em contato com a superf\u00edcie do alum\u00ednio fundido, onde a perda \u00e9 mais acentuada. Al\u00e9m disso, devido a paradas normais e anormais, revis\u00f5es e outros motivos na produ\u00e7\u00e3o de fundi\u00e7\u00e3o e lamina\u00e7\u00e3o de alum\u00ednio, muitas vezes \u00e9 necess\u00e1rio retirar o rotor, ainda incandescente, do alum\u00ednio fundido e exp\u00f4-lo ao ar. Portanto, o material de grafite do rotor deve possuir alta resist\u00eancia mec\u00e2nica e resist\u00eancia \u00e0 eros\u00e3o, bem como boa resist\u00eancia \u00e0 oxida\u00e7\u00e3o e \u00e0 corros\u00e3o.<\/p>","protected":false},"excerpt":{"rendered":"

With the rapid development of aluminum processing technology, the quality requirements for aluminum products are getting higher and higher. How to better purify the aluminum…<\/p>","protected":false},"author":1,"featured_media":9839,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[12341,659,324,4315,4313],"class_list":["post-9838","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-degassing-unit","tag-aluminum-dgeassing","tag-degassing-box","tag-degassing-system","tag-graphite-rotor","tag-metal-degassing"],"yoast_head":"\nAluminum Degassing Box -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"The key equipment for the bubble floatation method to purify molten aluminum is the degassing box, and the graphite rotor is the main part.\" \/>\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-degassing-box\/\" \/>\n<meta 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