{"id":10339,"date":"2021-09-23T03:01:48","date_gmt":"2021-09-23T03:01:48","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10339"},"modified":"2021-09-23T03:01:48","modified_gmt":"2021-09-23T03:01:48","slug":"aluminum-smelter-flux","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/aluminum-smelter-flux\/","title":{"rendered":"Fluxo para fundi\u00e7\u00e3o de alum\u00ednio"},"content":{"rendered":"

A principal fun\u00e7\u00e3o do fluxo para fundi\u00e7\u00e3o de alum\u00ednio \u00e9 remover esc\u00f3ria e g\u00e1s, sendo amplamente utilizado em fornos de alum\u00ednio e fundi\u00e7\u00f5es.<\/p>\n

A capacidade de remo\u00e7\u00e3o de esc\u00f3ria do fundente utilizado na fundi\u00e7\u00e3o de alum\u00ednio \u00e9 determinada pela adsor\u00e7\u00e3o e dissolu\u00e7\u00e3o das inclus\u00f5es oxidadas na massa fundida pelo fundente, bem como pela intera\u00e7\u00e3o qu\u00edmica entre o fundente e a massa fundida.<\/p>\n

As inclus\u00f5es oxidadas n\u00e3o s\u00e3o molhadas pelo alum\u00ednio fundido, e a tens\u00e3o interfacial entre os dois \u00e9 muito elevada; j\u00e1 o fundente \u00e9 molhado pelas inclus\u00f5es oxidadas, e a tens\u00e3o interfacial entre os dois \u00e9 relativamente baixa.<\/p>\n

Depois do fluxo de refino<\/a>\u00a0Ao absorver as inclus\u00f5es oxidadas na massa fundida, ele pode reduzir a energia livre superficial do sistema. Portanto, o fundente possui a capacidade de adsorver automaticamente as inclus\u00f5es de oxida\u00e7\u00e3o, ou seja, essa \u00e9 a sua propriedade de refinamento. Essa adsor\u00e7\u00e3o \u00e9 a principal raz\u00e3o para a remo\u00e7\u00e3o da esc\u00f3ria pelo fundente.<\/p>\n

Obviamente, quanto menor for a tens\u00e3o interfacial entre o fundente e as inclus\u00f5es n\u00e3o met\u00e1licas, e quanto maior for a tens\u00e3o interfacial entre o fundente e o alum\u00ednio fundido, bem como a tens\u00e3o interfacial entre o alum\u00ednio fundido e as inclus\u00f5es n\u00e3o met\u00e1licas, melhor ser\u00e1 a adsor\u00e7\u00e3o do fundente. Quanto mais forte for o efeito de remo\u00e7\u00e3o de esc\u00f3ria, o efeito de dissolu\u00e7\u00e3o do fluxo sobre os \u00f3xidos \u00e9 determinado pela natureza do fluxo.<\/p>\n

Geralmente, quando a estrutura molecular dos fundentes \u00e9 semelhante \u00e0 estrutura molecular ou \u00e0s propriedades qu\u00edmicas de alguns \u00f3xidos, pode ocorrer dissolu\u00e7\u00e3o m\u00fatua a uma determinada temperatura. Por exemplo, o Al\u2082O\u2083 e o Na\u2083AlF\u2086, bem como o MgO e o MgCl\u2082, que possuem o mesmo c\u00e1tion, apresentam uma certa solubilidade m\u00fatua. No entanto, na faixa normal de temperatura de refino do alum\u00ednio fundido, a quantidade de \u00f3xidos dissolvidos no fundente \u00e9 muito pequena.<\/p>\n

O efeito de desgaseifica\u00e7\u00e3o do fluxo utilizado na fundi\u00e7\u00e3o de alum\u00ednio se manifesta principalmente em tr\u00eas aspectos:<\/p>\n

Primeiro, \u00e0 medida que o complexo \u00e9 removido, parte do hidrog\u00eanio complexado absorvido pelas impurezas oxidadas \u00e9 removida. Em segundo lugar, quando o fluxo se decomp\u00f5e ou interage com a massa fundida, forma-se um produto gasoso que permite a difus\u00e3o e a remo\u00e7\u00e3o do hidrog\u00eanio. Al\u00e9m disso, como a pel\u00edcula de \u00f3xido na superf\u00edcie da massa fundida \u00e9 dissolvida, fica mais f\u00e1cil para o hidrog\u00eanio at\u00f4mico dissolvido se difundir para a atmosfera. No entanto, o efeito de desgaseifica\u00e7\u00e3o do fluxo \u00e9 limitado. Em condi\u00e7\u00f5es de produ\u00e7\u00e3o, seu teor de hidrog\u00eanio s\u00f3 pode cair para o n\u00edvel de 0,2-0,25 ml\/100 g de Al. O uso do AdTech online equipamento de purifica\u00e7\u00e3o por desgaseifica\u00e7\u00e3o<\/a> pode reduzir ainda mais o teor de hidrog\u00eanio no alum\u00ednio fundido.<\/p>","protected":false},"excerpt":{"rendered":"

The main function of aluminum smelter flux is to remove slag and gas, and is widely used in aluminum furnaces and foundries. The slag removal…<\/p>","protected":false},"author":1,"featured_media":10340,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[120],"tags":[],"class_list":["post-10339","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fluxes"],"yoast_head":"\nAluminum Smelter Flux Used to Remove Slag and Gas<\/title>\n<meta name=\"description\" content=\"The main function of aluminum smelter flux is to remove slag and gas, and is widely used in aluminum furnaces and foundries.\" \/>\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-smelter-flux\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Aluminum Smelter Flux Used to Remove 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