{"id":8225,"date":"2021-03-31T03:23:01","date_gmt":"2021-03-31T03:23:01","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8225"},"modified":"2021-03-31T03:23:01","modified_gmt":"2021-03-31T03:23:01","slug":"foam-filter-for-molten-aluminum","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/foam-filter-for-molten-aluminum\/","title":{"rendered":"Filtro de espuma para aluminio fundido"},"content":{"rendered":"<p>La filtraci\u00f3n del metal fundido es una pr\u00e1ctica industrial. En concreto, en el sector es habitual utilizar un filtro de espuma de malla para el aluminio fundido. Como todos sabemos, la resistencia al fuego y la estabilidad qu\u00edmica del material filtrante son esenciales para lograr una retenci\u00f3n eficaz de las inclusiones y evitar que los productos de reacci\u00f3n se liberen del material filtrante y se introduzcan como contaminantes en el metal fundido.<\/p>\n<p>Los filtros de espuma reticulada que utilizan part\u00edculas de \u00e1rido de al\u00famina en la fase aglutinante se emplean generalmente para filtrar aluminio y aleaciones de aluminio. Lamentablemente, en el \u00e1mbito t\u00e9cnico se reconoce ampliamente que el fosfato de aluminio presenta una escasa resistencia qu\u00edmica, especialmente cuando se utiliza con aleaciones de aluminio que contienen magnesio. Durante su uso, el magnesio corroe la zona de los l\u00edmites de grano, lo que provoca un ablandamiento y la liberaci\u00f3n de part\u00edculas de al\u00famina en forma de inclusiones. Se sabe que este ablandamiento puede mermar la resistencia de la estructura de espuma reticulada. Otro problema de los filtros basados en ortofosfato de aluminio son los posibles problemas medioambientales causados por la formaci\u00f3n de gas fosfina a partir de los filtros usados.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-8175\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/03\/Ceramic-Filters-For-Aluminium-2.jpg\" alt=\"Filtros cer\u00e1micos para aluminio\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/03\/Ceramic-Filters-For-Aluminium-2.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/03\/Ceramic-Filters-For-Aluminium-2-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>AdTech <a href=\"http:\/\/www.alalloycasting.com\/es\/alumina-ceramic-foam-filter\/\">Filtro de espuma cer\u00e1mica de al\u00famina<\/a> Para el aluminio fundido se utiliza preferentemente la tecnolog\u00eda de replicaci\u00f3n de espuma, un m\u00e9todo habitual para fabricar espuma cer\u00e1mica reticulada, que se emplea como dispositivo de filtrado para el metal fundido. Para formar el filtro, la espuma \u2014preferiblemente de poliuretano\u2014 se recubre con una lechada cer\u00e1mica y, a continuaci\u00f3n, se seca y se cuece. Durante el proceso de cocci\u00f3n, el recubrimiento cer\u00e1mico interior de la espuma de poliuretano se vaporiza, pero los restos de la estructura cer\u00e1mica hacen que la espuma cer\u00e1mica, similar a un exoesqueleto, presente huecos en los lugares donde antes se encontraba el poliuretano. La estructura consiste esencialmente en una red de varillas de soporte, y existen poros alrededor y en el interior de dichas varillas.<\/p>\n<p>La pasta utilizada depende del material cer\u00e1mico requerido para la aplicaci\u00f3n seleccionada. Debe ofrecer un rendimiento suficiente en el producto final para soportar aplicaciones espec\u00edficas, y debe tener la resistencia estructural y\/o mec\u00e1nica suficiente para soportar condiciones espec\u00edficas de alta temperatura. Adem\u00e1s, es preferible que la pasta tenga una fluidez relativamente alta y, con mayor preferencia a\u00fan, que incluya una suspensi\u00f3n acuosa de cer\u00e1micas destinada a su uso en el filtro. Por lo general, la pasta contiene agua. En la pasta se pueden utilizar aditivos como aglutinantes y tensioactivos.<\/p>\n<p>El material de espuma flexible se impregna con la suspensi\u00f3n cer\u00e1mica acuosa, de modo que la malla fibrosa quede recubierta por ella y los huecos se rellenen con ella. Por lo general, es preferible sumergir la espuma repetidamente en la suspensi\u00f3n y comprimirla entre cada inmersi\u00f3n para garantizar que quede completamente impregnada.<\/p>","protected":false},"excerpt":{"rendered":"<p>The filtration of molten metal is an industrial practice. In particular, it is widely practiced in the art to use a mesh foam filter for&hellip;<\/p>","protected":false},"author":1,"featured_media":8226,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8225","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>Foam Filter for Molten Aluminum -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Ceramic Foam Filter for Molten Aluminum is impregnated with the aqueous ceramic slurry so that the fibrous web is coated with it.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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