{"id":11198,"date":"2021-11-14T08:35:55","date_gmt":"2021-11-14T08:35:55","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11198"},"modified":"2021-11-12T08:41:22","modified_gmt":"2021-11-12T08:41:22","slug":"metal-melt-refining","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/metal-melt-refining\/","title":{"rendered":"Refinado de metales fundidos"},"content":{"rendered":"<p>La mayor\u00eda de los fabricantes de piezas fundidas y laminadas utilizan arg\u00f3n o nitr\u00f3geno de alta pureza como gas portador para el refinado, y purifican la masa fundida inyectando fundentes en ella con el fin de refinarla.<\/p>\n<p>Dado que el gas inerte es insoluble en el aluminio, cuando se introducen en la soluci\u00f3n burbujas de gas inerte peque\u00f1as y uniformes, la presi\u00f3n del hidr\u00f3geno en la soluci\u00f3n es mayor que la presi\u00f3n en el interior de las burbujas, por lo que el hidr\u00f3geno presente en el metal seguir\u00e1 difundi\u00e9ndose hacia las burbujas de gas inerte hasta que la diferencia de presi\u00f3n sea cero y se alcance el equilibrio. Durante el proceso de flotaci\u00f3n de las burbujas, se elimina una parte del hidr\u00f3geno presente en la soluci\u00f3n. Debido a la tensi\u00f3n superficial de la burbuja, las impurezas en suspensi\u00f3n en la soluci\u00f3n se adsorben en la superficie de la burbuja, y una parte de la escoria tambi\u00e9n se elimina durante la flotaci\u00f3n de las burbujas. Por lo tanto, cuantas m\u00e1s burbujas se inyecten en la masa fundida, mejor, y cuanto m\u00e1s densas sean, mejor.<\/p>\n<p>El refinado del metal fundido se realiza principalmente mediante <a href=\"http:\/\/www.alalloycasting.com\/es\/powder-fluxes\/\">fundente en polvo<\/a>, y el flujo est\u00e1 compuesto principalmente por cloruro, fluoruro y carbonato. Mediante la adsorci\u00f3n, la disoluci\u00f3n y la reacci\u00f3n qu\u00edmica de las sales, as\u00ed como la adsorci\u00f3n de las burbujas de material vol\u00e1til generadas, se logra el objetivo de eliminar las escorias y los gases.<\/p>\n<p>El aluminio fundido presenta numerosas inclusiones oxidadas y un elevado contenido de escoria. El contenido de inclusiones de escoria en el aluminio primario electrol\u00edtico suele situarse entre 1% y 2%. Se trata de impurezas nocivas que no solo afectan al rendimiento del papel de aluminio, sino que tambi\u00e9n provocan f\u00e1cilmente grietas o roturas de la banda durante el proceso de laminado.<\/p>\n<p>La impureza gaseosa presente en el aluminio l\u00edquido electrol\u00edtico es principalmente hidr\u00f3geno (entre 70% y 90% aproximadamente). El contenido de hidr\u00f3geno de la soluci\u00f3n de aluminio electrol\u00edtico es superior a 0,30 ml\/(100 g de Al). Cuando la desgasificaci\u00f3n no es completa, el hidr\u00f3geno precipitado durante la solidificaci\u00f3n de la chapa laminada en caliente se acumula en la parte delantera de la boquilla de colada. Al laminar la chapa fundida y laminada, esta se va extrayendo de forma continua, formando un canal de aire. Cuando el fen\u00f3meno es leve, los microporos se comprimen entre s\u00ed formando rayas blanquecinas en la superficie de la chapa; cuando es grave, se agrieta directamente y forma rayas en forma de surco. El uso de estas chapas laminadas en caliente provocar\u00e1 una gran cantidad de desperdicio por poros y la rotura o agrietamiento del papel de aluminio, y no permite garantizar la producci\u00f3n de este \u00faltimo. Este es el eslab\u00f3n clave que debe controlarse en la producci\u00f3n.<\/p>","protected":false},"excerpt":{"rendered":"<p>Most of the casting and rolling manufacturers use high-purity argon or nitrogen as the carrier for refining, and purify the melt by blowing fluxes into&hellip;<\/p>","protected":false},"author":1,"featured_media":11201,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12808,12809],"class_list":["post-11198","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-metal-melt-refining-with-nitrogen","tag-molten-aluminum-flux"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Metal Melt Refining with Nitrogen, Molten Aluminum Flux<\/title>\n<meta name=\"description\" content=\"High-purity argon or nitrogen as the carrier for 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