{"id":5504,"date":"2020-10-12T08:40:33","date_gmt":"2020-10-12T08:40:33","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5504"},"modified":"2020-10-12T08:40:33","modified_gmt":"2020-10-12T08:40:33","slug":"metallurgical-filter","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/metallurgical-filter\/","title":{"rendered":"Filtro metal\u00fargico"},"content":{"rendered":"<p>El filtro metal\u00fargico solo puede eliminar las inclusiones que ya se encuentran en la corriente l\u00edquida, y solo las impurezas infusibles pueden eliminarse mediante el filtro de metal fundido. La idea de reducir las inclusiones en las piezas fundidas es tan antigua como la propia fundici\u00f3n. En las d\u00e9cadas de 1920 y 1930, se utiliz\u00f3 un sistema de canalizaci\u00f3n para dise\u00f1ar una bolsa de escoria destinada a capturar inclusiones en metales ferrosos con una gran diferencia de densidad entre las inclusiones met\u00e1licas. El canal plano se utiliza para aumentar la capacidad del canal de capturar inclusiones y resulta eficaz para las inclusiones de pel\u00edcula de \u00f3xido. El elemento filtrante se dise\u00f1\u00f3 en la d\u00e9cada de 1960 para capturar part\u00edculas gruesas. <a href=\"http:\/\/www.alalloycasting.com\/es\/ceramic-foam-filter-pal\/\">Filtros de espuma cer\u00e1mica<\/a> Comenz\u00f3 a utilizarse en aplicaciones industriales en la d\u00e9cada de 1970, principalmente en aleaciones de aluminio. Desde la d\u00e9cada de 1980, se ha aplicado al hierro fundido, y su aplicaci\u00f3n en el acero fundido se produjo m\u00e1s tarde, con el fin de sustituir el complicado dise\u00f1o del canal de colada por un filtro que ofrec\u00eda mejores resultados.<\/p>\n<h2>Mecanismo de filtrado del filtro metal\u00fargico<\/h2>\n<p>El mecanismo de filtrado de la malla hace que la parte delantera (entrada) del filtro retenga las part\u00edculas de gran tama\u00f1o, m\u00e1s grandes que sus aberturas.<\/p>\n<p>El mecanismo de filtrado por capas est\u00e1 formado por las inclusiones que se capturan inicialmente en la superficie del filtro. Las inclusiones de menor tama\u00f1o son capturadas por las de mayor tama\u00f1o.<\/p>\n<p>El mecanismo de filtraci\u00f3n profunda se lleva a cabo en todo el volumen del filtro. El principio se basa en la adhesi\u00f3n de las impurezas a la pared del filtro cer\u00e1mico y en la adhesi\u00f3n mutua entre las propias impurezas.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5507\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/10\/Metallurgical-Filter3.jpg\" alt=\"Filtro metal\u00fargico\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Metallurgical-Filter3.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Metallurgical-Filter3-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>El filtro de espuma cer\u00e1mica se basa en un sistema de estructura celular penta\u00e9drica interconectada. El filtro de espuma se fabrica sumergiendo espuma de poliuretano en una suspensi\u00f3n cer\u00e1mica adecuada. Tras la calcinaci\u00f3n de la espuma, se obtiene la estructura del filtro cer\u00e1mico. Su porosidad viene determinada por la porosidad de la espuma utilizada. La porosidad se eval\u00faa mediante el n\u00famero de poros por pulgada (254 mm), definido como ppi (poros por pulgada, es decir, el n\u00famero de poros por pulgada). En la fundici\u00f3n, se suelen utilizar filtros con una porosidad de 20, 30 y 50 ppi. El valor de ppi no es el valor real; se trata simplemente de un c\u00f3digo. El valor real de ppi es inferior al valor indicado.<\/p>\n<p>El flujo de metal en el canal de colada suele ser turbulento. La turbulencia provoca la erosi\u00f3n de la pared del perfil y la oxidaci\u00f3n del metal, lo que da lugar a un aumento de las inclusiones y a la retenci\u00f3n de gas. El patr\u00f3n de flujo depende del tipo de aleaci\u00f3n, la forma del sistema de colada, el cambio en la direcci\u00f3n del flujo de metal y la velocidad de flujo. Al pasar por el filtro, el flujo se vuelve tranquilo: el flujo turbulento se transforma en flujo laminar. Tras recorrer una cierta distancia, la turbulencia reaparece, aunque normalmente en menor grado que antes de pasar por el filtro. Esto es muy importante para la fundici\u00f3n de aleaciones de aluminio.<\/p>","protected":false},"excerpt":{"rendered":"<p>The metallurgical filter can only remove the inclusions that are already in the liquid stream, and only the infusible impurities can be removed through the&hellip;<\/p>","protected":false},"author":1,"featured_media":5505,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[],"class_list":["post-5504","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Metallurgical Filter for Purifying Molten Metal | Ceramic Foam Filter<\/title>\n<meta name=\"description\" content=\"Metallurgical filter can only remove the inclusions that are already in the liquid stream, and only the infusible 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