{"id":8643,"date":"2021-04-30T03:16:49","date_gmt":"2021-04-30T03:16:49","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8643"},"modified":"2021-04-30T03:16:49","modified_gmt":"2021-04-30T03:16:49","slug":"melting-aluminum-impurities-removal","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/melting-aluminum-impurities-removal\/","title":{"rendered":"Eliminaci\u00f3n de impurezas del aluminio fundido"},"content":{"rendered":"

La eliminaci\u00f3n de impurezas durante la fusi\u00f3n del aluminio se utiliza principalmente para purificar el l\u00edquido de la aleaci\u00f3n reci\u00e9n fundida en el proceso de fundici\u00f3n, con el fin de reducir o eliminar los problemas derivados de diversas inclusiones no met\u00e1licas en dicho proceso. Los residuos de fundici\u00f3n provocados por defectos como las inclusiones no met\u00e1licas representan hasta el 50%-60% del total de residuos. Cuando aumentan diversos costes, es posible prever los da\u00f1os causados por el entorno externo y la salida de residuos en exceso; adem\u00e1s, la presencia de defectos no solo reduce gravemente las propiedades mec\u00e1nicas y el rendimiento de la pieza fundida, sino que tambi\u00e9n tiene un efecto perjudicial en el proceso de mecanizado y en el aspecto de la misma.<\/p>\n

Para eliminar las impurezas de los fundidos de aluminio se suele utilizar espuma de poliuretano como soporte, que se sumerge en una pasta cer\u00e1mica compuesta por polvos finos, como \u00e1ridos refractarios, aglutinantes y agua, y a continuaci\u00f3n se escurre el exceso de pasta que rodea las fibras de la espuma. Tras el secado, tostado y sinterizaci\u00f3n a alta temperatura de los materiales cer\u00e1micos, se obtienen finalmente los productos cer\u00e1micos espumados.
\nDado que la temperatura de fundici\u00f3n de la aleaci\u00f3n es diferente, la pieza fundida debe estar fabricada con filtro de espuma cer\u00e1mica refractaria<\/a>. En las \u00faltimas d\u00e9cadas, en funci\u00f3n de las propiedades de las distintas aleaciones, se han desarrollado sucesivamente, tanto en nuestro pa\u00eds como en el extranjero, filtros de espuma cer\u00e1mica de diversos materiales.<\/p>\n

La eliminaci\u00f3n de impurezas del aluminio fundido no solo permite eliminar eficazmente una gran cantidad de impurezas extra\u00f1as del aluminio l\u00edquido, sino que tambi\u00e9n filtra peque\u00f1as inclusiones de unas pocas micras que no pueden eliminarse mediante los procesos tradicionales. Dado que los iones nocivos, como los \u00e1tomos de hidr\u00f3geno presentes en el aluminio l\u00edquido, suelen adsorberse en las inclusiones, y que estas pueden convertirse en el n\u00facleo de la formaci\u00f3n de burbujas, es posible reducir los gases nocivos del aluminio l\u00edquido al tiempo que se filtran las inclusiones.<\/p>\n

\"Unidad<\/p>\n

Los fabricantes de elementos filtrantes de espuma cer\u00e1mica para aluminio fundido adoptar\u00e1n un conjunto relativamente completo de medidas para garantizar la estabilidad del producto y asegurar que la resistencia, la tasa de orificios pasantes, las dimensiones geom\u00e9tricas, la calidad est\u00e9tica y las propiedades f\u00edsico-qu\u00edmicas del producto final cumplan con las normas. En la producci\u00f3n, para lograr un mejor efecto de filtrado, el aluminio l\u00edquido situado aguas arriba del filtro debe tener un cierto grado de limpieza; es decir, el aluminio l\u00edquido aguas arriba puede tratarse mediante deshidrogenaci\u00f3n con gas tradicional o con fundente.<\/p>\n

Si no se adoptan las medidas anteriores, la filtraci\u00f3n y la purificaci\u00f3n de fundidos con un alto contenido en hidr\u00f3geno y ox\u00edgeno, numerosas inclusiones no met\u00e1licas y aleaciones de aluminio, as\u00ed como de gran tama\u00f1o, no solo reducir\u00e1n la eficacia de la filtraci\u00f3n, sino que tambi\u00e9n obstruir\u00e1n f\u00e1cilmente el filtro, lo que provocar\u00e1 un aumento de los costes y unos resultados de purificaci\u00f3n deficientes.<\/p>\n

Tras aplicar las medidas anteriores, el contenido de hidr\u00f3geno en la aleaci\u00f3n fundida se ha reducido a un nivel muy bajo, y el tama\u00f1o de las inclusiones de \u00f3xido en la masa fundida tambi\u00e9n es muy peque\u00f1o. Por lo tanto, el uso de filtros de espuma de aluminio fundido permite eliminar eficazmente las inclusiones de \u00f3xido finas y dispersas, lo que mejora la eficiencia de la filtraci\u00f3n y reduce los costes de filtraci\u00f3n y purificaci\u00f3n.<\/p>\n

Adem\u00e1s, es necesario proteger el aluminio l\u00edquido filtrado de alta calidad frente a la contaminaci\u00f3n secundaria; es decir, los materiales refractarios situados aguas abajo de la caja de filtrado deben cumplir requisitos m\u00e1s estrictos, y debe protegerse la capa de \u00f3xido superficial del aluminio l\u00edquido aguas abajo.<\/p>","protected":false},"excerpt":{"rendered":"

Melting Aluminum Impurities Removal is mainly used to purify the as-cast alloy liquid in the casting process to reduce or eliminate the problems of various…<\/p>","protected":false},"author":1,"featured_media":8649,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8643","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nMelting Aluminum Impurities Removal with Ceramic Foam Filter<\/title>\n<meta name=\"description\" content=\"Melting Aluminum Impurities Removal is mainly used to purify the as-cast alloy liquid in the casting process to reduce inclusions.\" \/>\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\/melting-aluminum-impurities-removal\/\" \/>\n<meta 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