{"id":6431,"date":"2020-11-14T08:16:09","date_gmt":"2020-11-14T08:16:09","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6431"},"modified":"2020-11-13T09:25:17","modified_gmt":"2020-11-13T09:25:17","slug":"fluxes-for-purifying-aluminum","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/fluxes-for-purifying-aluminum\/","title":{"rendered":"Fundentes para la purificaci\u00f3n del aluminio"},"content":{"rendered":"<p>En la actualidad, existen algunas diferencias entre el concepto de preparaci\u00f3n y uso de los fundentes tanto a nivel nacional como internacional, que se reflejan principalmente en: La tendencia de investigaci\u00f3n sobre fundentes para la purificaci\u00f3n de aleaciones de aluminio fundidas en el extranjero se centra principalmente en una composici\u00f3n sencilla, un refinado de alta eficiencia y bajas emisiones, y se esfuerza por lograr el menor coste posible, tanto econ\u00f3mico como medioambiental, para conseguir una purificaci\u00f3n de alta eficiencia del aluminio fundido.<\/p>\n<p>Con los avances en la tecnolog\u00eda de procesamiento de aleaciones de aluminio y el desarrollo de la tecnolog\u00eda de purificaci\u00f3n mediante fundentes para estas aleaciones, han surgido nuevas caracter\u00edsticas en la preparaci\u00f3n de los fundentes y en los requisitos de rendimiento de los mismos, lo que no solo ha impuesto mayores exigencias en cuanto al efecto purificador de los fundentes, sino que tambi\u00e9n ha aportado nuevas perspectivas sobre la calidad de los propios fundentes.<\/p>\n<p>En la actualidad, el proceso de purificaci\u00f3n del aluminio fundido plantea requisitos cada vez m\u00e1s exigentes en materia de purificaci\u00f3n. La compleja composici\u00f3n de los componentes del fundente aumenta la posibilidad de que se produzca una contaminaci\u00f3n secundaria del aluminio fundido y del medio ambiente por parte del propio fundente. Mantener la composici\u00f3n de los componentes del fundente lo m\u00e1s sencilla posible, dadas las condiciones din\u00e1micas, es la \u00fanica forma de resolver los efectos secundarios derivados del propio proceso de uso del fundente.<\/p>\n<p>El eut\u00e9ctico formado por el disolvente de part\u00edculas tiene un mejor efecto de humectaci\u00f3n sobre las inclusiones de aluminio fundido en estado l\u00edquido, y estas pueden eliminarse aprovechando la diferencia de densidad. Sin embargo, los agentes de refinado suelen incorporar otros compuestos, como nitratos, sulfuros, fluoruros y compuestos de tierras raras, entre otros, para mejorar la eficiencia del refinado.<\/p>\n<p>En el fundente para la purificaci\u00f3n del aluminio a base de NaCl-KCl y KCl-MgCl\u2082, la adici\u00f3n de una cantidad adecuada de fluoruro permite eliminar f\u00e1cilmente la pel\u00edcula de \u00f3xido en la interfaz entre el fundente y el aluminio, de modo que la pel\u00edcula met\u00e1lica estable en dicha interfaz se rompe con facilidad y las inclusiones pasan del fundente al aluminio. El proceso de migraci\u00f3n en la interfaz l\u00edquida se desarrolla con facilidad. Si se a\u00f1ade una peque\u00f1a cantidad de criolita al agente de refinado, la criolita fundida puede humedecer completamente la al\u00famina y mejorar la capacidad de adsorci\u00f3n de las inclusiones de al\u00famina.<\/p>\n<p>Adem\u00e1s, la selecci\u00f3n de una parte de la <a href=\"http:\/\/www.alalloycasting.com\/es\/refining-agents\/\">agente refinador<\/a> A menudo se requiere que el componente tenga la funci\u00f3n de agente generador de gas. Si el agente de refinado contiene componentes capaces de generar gas, tras a\u00f1adir este fundente al aluminio fundido, el hidr\u00f3geno presente en la masa fundida se difundir\u00e1 hacia las burbujas formadas bajo el efecto de la diferencia de presi\u00f3n parcial. Durante el proceso de flotaci\u00f3n de las burbujas, el hidr\u00f3geno y las inclusiones se expulsar\u00e1n del aluminio fundido para lograr el objetivo de desgasificaci\u00f3n y eliminaci\u00f3n de impurezas. El hexacloroetano es un buen generador de gas. Aunque el principal problema que plantea el uso del hexacloroetano en el refinado es la grave contaminaci\u00f3n medioambiental que provoca, es innegable que se trata de un m\u00e9todo tradicional de fundente que ofrece mejores resultados de refinado.<\/p>","protected":false},"excerpt":{"rendered":"<p>At present, there are some gaps in the concept of flux preparation and use at home and abroad, which are mainly reflected in: The research&hellip;<\/p>","protected":false},"author":1,"featured_media":6488,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-6431","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>Fluxes for Purifying Aluminum -sales@alalloycasting.com<\/title>\n<meta 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