{"id":8814,"date":"2021-05-18T03:47:39","date_gmt":"2021-05-18T03:47:39","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8814"},"modified":"2021-05-18T03:47:39","modified_gmt":"2021-05-18T03:47:39","slug":"molten-alu-purification","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/molten-alu-purification\/","title":{"rendered":"Purificaci\u00f3n del aluminio fundido"},"content":{"rendered":"<p>El objetivo de la purificaci\u00f3n del aluminio fundido es eliminar el gas (hidr\u00f3geno) y las impurezas s\u00f3lidas (al\u00famina) presentes en el aluminio l\u00edquido. La purificaci\u00f3n del aluminio fundido requiere el uso de una sustancia capaz de separar la al\u00famina del metal fundido y expulsar el hidr\u00f3geno hacia el ba\u00f1o de fusi\u00f3n, pero que no se disuelva en el propio aluminio fundido. Esta sustancia se denomina <a href=\"http:\/\/www.alalloycasting.com\/es\/fluxes\/\">flujos<\/a>.<\/p>\n<p>La pel\u00edcula de \u00f3xido original y los productos de corrosi\u00f3n del aluminio son fuentes importantes de escoria e inclusiones en la masa fundida. Cuanto mayor sea la relaci\u00f3n entre la superficie y el volumen del aluminio, mayor ser\u00e1 su tendencia a la oxidaci\u00f3n y, por lo tanto, mayor ser\u00e1 la oxidaci\u00f3n continuada y la p\u00e9rdida de metal durante el proceso de fundici\u00f3n.<\/p>\n<p>Cuando los residuos finos y desmenuzados se preempaquetan y luego se introducen en el aluminio fundido, aunque se puede reducir la posibilidad de contacto con el aire, dado que los residuos contienen muchos huecos de aire, flotar\u00e1n en la superficie del aluminio fundido tras introducirse en el horno y no se hundir\u00e1n f\u00e1cilmente. El efecto esperado de aislar el aire no es satisfactorio, por lo que deben fundirse en lingotes o en aluminio antes de introducirlos.<\/p>\n<p>La pel\u00edcula de \u00f3xido y las part\u00edculas de impurezas suspendidas en el aluminio fundido son dif\u00edciles de eliminar por completo en un horno con una superficie muy abierta. El efecto de aplicar el fundente con la m\u00e1quina pulverizadora de polvo es mejor, pero sigue siendo dif\u00edcil lograr el objetivo de purificar de forma exhaustiva el aluminio fundido. Por lo tanto, adem\u00e1s de utilizar el fundente en el horno de gran capacidad para eliminar algunas impurezas contaminantes, los talleres modernos de fundici\u00f3n y moldeo tambi\u00e9n emplean un dispositivo de purificaci\u00f3n en l\u00ednea situado fuera del horno, con el fin de eliminar por completo las inclusiones de gas y escoria que quedan en el aluminio fundido.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-8800\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/05\/Degassing-and-Filtering-Equipment.jpg\" alt=\"Equipos de desgasificaci\u00f3n y filtrado\" width=\"660\" height=\"494\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/05\/Degassing-and-Filtering-Equipment.jpg 660w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/05\/Degassing-and-Filtering-Equipment-300x225.jpg 300w\" sizes=\"auto, (max-width: 660px) 100vw, 660px\" \/><\/p>\n<p>El principio de la <a href=\"http:\/\/www.alalloycasting.com\/es\/rotary-degassing-purification-equipment\/\">dispositivo de purificaci\u00f3n de aluminio fundido<\/a>\u00a0Fuera del horno, el objetivo es permitir que el aluminio fundido entre en contacto total con el gas inerte en un peque\u00f1o horno de purificaci\u00f3n equipado con un calentador, de modo que el hidr\u00f3geno presente en el aluminio fundido se difunda hacia las burbujas de gas inerte \u2014donde la presi\u00f3n parcial de hidr\u00f3geno es nula\u2014 y se escape. Las escorias s\u00f3lidas suspendidas en el aluminio l\u00edquido tambi\u00e9n se adsorber\u00e1n en la superficie de las burbujas y se eliminar\u00e1n junto con ellas.<\/p>\n<p>Tras el tratamiento de purificaci\u00f3n en l\u00ednea del aluminio fundido, el contenido de hidr\u00f3geno del aluminio fundido puede reducirse a la mitad del valor original. Las inclusiones no met\u00e1licas con un di\u00e1metro de part\u00edcula inferior a 50 \u03bcm pueden eliminarse con 50%, y las de m\u00e1s de 100 \u03bcm, con 90%. La adici\u00f3n de entre 0,5% y 3% de Cl\u2082 en el gas inerte puede aumentar la tasa de eliminaci\u00f3n de hidr\u00f3geno de 50% a 65%, y tambi\u00e9n permite eliminar entre 60% y 75% de Na y Li, lo que resulta beneficioso para la producci\u00f3n de aleaciones de aluminio y magnesio.<\/p>","protected":false},"excerpt":{"rendered":"<p>The purpose of molten Alu purification is to remove the gas (hydrogen) and solid impurities (alumina) in the aluminum liquid. Purification of molten aluminum requires&hellip;<\/p>","protected":false},"author":1,"featured_media":8815,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8814","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Molten Alu Purification with Fluxes and Online Treatment<\/title>\n<meta name=\"description\" content=\"The purpose of molten Alu purification is to remove the gas (hydrogen) and solid impurities (alumina) in the aluminum liquid.\" \/>\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\/es\/molten-alu-purification\/\" \/>\n<meta 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