{"id":7032,"date":"2020-12-16T05:42:16","date_gmt":"2020-12-16T05:42:16","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7032"},"modified":"2020-12-16T05:42:16","modified_gmt":"2020-12-16T05:42:16","slug":"molten-metals-flux","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/molten-metals-flux\/","title":{"rendered":"Fluxo para metais fundidos"},"content":{"rendered":"<p>O fluxo remove impurezas dissolvidas e em suspens\u00e3o, incluindo \u00f3xidos, nitretos, carbonetos e carbonatos de metais fundidos e elementos de liga. As impurezas dissolvidas incluem gases e s\u00f3lidos dissolvidos. O g\u00e1s dissolvido no alum\u00ednio fundido inclui, por exemplo, hidrog\u00eanio, e as part\u00edculas s\u00f3lidas dissolvidas incluem elementos de metais alcalinos, como s\u00f3dio e c\u00e1lcio. Por exemplo, quando o g\u00e1s cloro \u00e9 adicionado, ele forma um sal de cloreto impuro, que sobe \u00e0 superf\u00edcie e \u00e9 removido. Os s\u00f3lidos em suspens\u00e3o s\u00e3o transportados para a superf\u00edcie da massa fundida ao se fixarem nas bolhas que sobem. O hidrog\u00eanio \u00e9 removido por dessor\u00e7\u00e3o para dentro das bolhas. Portanto, \u00e9 importante manter uma distribui\u00e7\u00e3o finamente dispersa do g\u00e1s de fluxo ou do sal de fluxo por toda a massa fundida, a fim de proporcionar muitos locais para a coleta e remo\u00e7\u00e3o de impurezas dissolvidas e em suspens\u00e3o.<\/p>\n<p>Quando o g\u00e1s de fluxo \u00e9 introduzido no metal fundido na forma de uma dispers\u00e3o fina de bolhas, essa dispers\u00e3o fina de bolhas se aglomera para formar bolhas maiores \u00e0 medida que migram para a superf\u00edcie. A coalesc\u00eancia de bolhas grandes faz com que a regi\u00e3o superior do metal fundido seja fluxada com menor efic\u00e1cia. Com base no mesmo volume de g\u00e1s de fluxo, um grande n\u00famero de bolhas oferece menos pontos de remo\u00e7\u00e3o de impurezas do que um grande n\u00famero de bolhas finamente dispersas. Por exemplo, conforme observado no metal fundido, especialmente na regi\u00e3o superior, a \u00e1rea de superf\u00edcie das bolhas \u00e9 muito menor, e o hidrog\u00eanio pode ser absorvido pela superf\u00edcie das bolhas, ou s\u00f3lidos em suspens\u00e3o podem aderir \u00e0 superf\u00edcie das bolhas para serem transportados at\u00e9 a superf\u00edcie. Ou seja, bolhas grandes oferecem menos locais para coletar e remover impurezas dissolvidas e em suspens\u00e3o. Portanto, \u00e9 desej\u00e1vel redispersar as bolhas maiores em uma dispers\u00e3o de bolhas na regi\u00e3o superior.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6947\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/12\/Molten-Aluminum-Rotary-Degassing.jpg\" alt=\"Desgaseamento rotativo de alum\u00ednio fundido\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/12\/Molten-Aluminum-Rotary-Degassing.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/12\/Molten-Aluminum-Rotary-Degassing-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Para distribuir o fluxo de metais fundidos, o impulsor gira na regi\u00e3o inferior a fim de distribuir o fluxo. Quando o fluxo \u00e9 um g\u00e1s, ele pode ser introduzido pela conduta para ser ejetado pela fenda do impulsor. Quando o g\u00e1s \u00e9 ejetado do impulsor para dentro do metal fundido, ele geralmente \u00e9 distribu\u00eddo na \u00e1rea inferior na forma de bolhas finas por cisalhamento.<\/p>\n<p>Para distribuir o g\u00e1s no metal na regi\u00e3o inferior, a velocidade de rota\u00e7\u00e3o deve ser alta o suficiente para gerar uma for\u00e7a de cisalhamento entre o impulsor e o metal fundido, a fim de produzir bolhas finas de g\u00e1s de fluxo. Quando o impulsor gira na \u00e1rea inferior, o g\u00e1s de fluxo \u00e9 emitido a partir dali, dependendo, em certa medida, do funcionamento do <a href=\"http:\/\/www.alalloycasting.com\/pt\/molten-metal-flux\/\">fluxo de metal fundido<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>The flux removes dissolved and suspended impurities, including oxides, nitrides, carbides, and carbonates of molten metals and alloying elements. Dissolved impurities include dissolved gases and&hellip;<\/p>","protected":false},"author":1,"featured_media":7033,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[],"class_list":["post-7032","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Molten Metals Flux used to Remove Hydrogen and Solid Particles<\/title>\n<meta name=\"description\" content=\"The flux removes dissolved and suspended impurities, including oxides, carbides, and carbonates of molten metals and alloying elements.\" \/>\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-metals-flux\/\" 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