{"id":3200,"date":"2020-07-30T13:53:41","date_gmt":"2020-07-30T13:53:41","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=3200"},"modified":"2020-08-18T06:05:01","modified_gmt":"2020-08-18T06:05:01","slug":"ceramic-foam-filters-for-casting","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/ceramic-foam-filters-for-casting\/","title":{"rendered":"Filtros de espuma cer\u00e1mica para fundici\u00f3n"},"content":{"rendered":"<p>La mayor\u00eda de las fundiciones de aluminio utilizan filtros de espuma cer\u00e1mica para fundici\u00f3n y fundentes con el fin de eliminar las inclusiones. El aluminio l\u00edquido reacciona qu\u00edmicamente con el ox\u00edgeno, el nitr\u00f3geno, el azufre, el carbono y otros elementos, lo que da lugar a impurezas no met\u00e1licas. Entre ellas, las inclusiones de \u00f3xido (Al\u2082O\u2083) son las que causan la contaminaci\u00f3n m\u00e1s grave del metal. Por lo general, la cantidad total de inclusiones de \u00f3xido en el lingote oscila entre 0,002% y 0,02%.<\/p>\n<p><a href=\"http:\/\/www.alalloycasting.com\/es\/foam-ceramic-filters\/\">Filtros cer\u00e1micos de espuma<\/a> El proceso de fundici\u00f3n elimina las inclusiones no met\u00e1licas del aluminio fundido y utiliza un tratamiento con fundente en el horno. La tecnolog\u00eda de filtraci\u00f3n con espuma cer\u00e1mica fuera del horno se ha convertido desde hace tiempo en un m\u00e9todo importante para purificar el aluminio fundido.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3210\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/07\/Ceramic-Foam-Filters-for-Casting.jpg\" alt=\"Filtros de espuma cer\u00e1mica para fundici\u00f3n\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/07\/Ceramic-Foam-Filters-for-Casting.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/07\/Ceramic-Foam-Filters-for-Casting-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Las fuentes de las inclusiones en la aleaci\u00f3n de aluminio son las siguientes:<\/p>\n<p>(1) El \u00f3xido formado por la interacci\u00f3n entre la superficie de la aleaci\u00f3n de aluminio y el gas oxidante presente en los gases del horno, como el Al\u2082O\u2083. Esta pel\u00edcula de \u00f3xido protege el aluminio l\u00edquido de la oxidaci\u00f3n. Sin embargo, una vez que la pel\u00edcula superficial se rompe, queda envuelta en aluminio fundido. Dado que el Al\u2082O\u2083 tiene un punto de fusi\u00f3n elevado (2050 grados) y una densidad (3,5~4,0) superior a la del aluminio fundido, no flota, por lo que es f\u00e1cil que se formen inclusiones de \u00f3xido en la pieza fundida.<\/p>\n<p>(2) El \u00f3xido presente en la carga tambi\u00e9n es una fuente importante de inclusiones de \u00f3xido en la aleaci\u00f3n. Por ejemplo, los lingotes de aluminio y las aleaciones intermedias contienen inclusiones como el Al\u2082O\u2083, y el \u00f3xido de aluminio (Al(OH)\u2083) presente en la superficie del lingote de aluminio puede contaminar directamente el aluminio fundido durante el proceso de fundici\u00f3n.<\/p>\n<p>En comparaci\u00f3n con el aluminio, los elementos de aleaci\u00f3n como el silicio, el zinc, el cobre, etc., que tienen una menor afinidad por el ox\u00edgeno, no se oxidan f\u00e1cilmente bajo la protecci\u00f3n de la pel\u00edcula de \u00f3xido. Incluso si se oxida una peque\u00f1a cantidad de estos elementos, el \u00f3xido resultante es denso y no da\u00f1a la continuidad de la pel\u00edcula de \u00f3xido de aluminio. Por lo tanto, en la fundici\u00f3n de aleaciones de Al-Si, Al-Cu y Al-Zn no es necesario a\u00f1adir <a href=\"http:\/\/www.alalloycasting.com\/es\/tundish-flux\/\">agentes de recubrimiento<\/a>.<\/p>\n<p>El elemento que tiene afinidad por el ox\u00edgeno en las aleaciones de aluminio es el magnesio. El magnesio es m\u00e1s ligero que el aluminio y se oxida con mayor facilidad que este. El MgO que se forma tras la oxidaci\u00f3n no es denso y destruye la densa pel\u00edcula de \u00f3xido de aluminio. Dado que el magnesio anula el efecto protector de la pel\u00edcula de \u00f3xido de aluminio, la fusi\u00f3n de la aleaci\u00f3n de aluminio y magnesio debe llevarse a cabo siguiendo las normas relativas al fundente.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ceramic Foam Filters for Casting and fluxes are used to remove the inclusions by most aluminum foundries. Liquid aluminum reacts chemically with oxygen, nitrogen, sulfur,&hellip;<\/p>","protected":false},"author":1,"featured_media":3210,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20,138],"tags":[1695,1680,1697,1685,1683,1687,1690,222,1698,1699,1694,1691,1684,1682,1686,1696,1688,1692,1693,223,1681,1689,752],"class_list":["post-3200","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ceramic-foam-filter","category-seo","tag-alumina-ceramic-foam-filter-aluminum-casting-industry","tag-alumina-ceramic-foam-filter-for-alumina-alloys","tag-alumina-ceramic-foam-filter-for-casting-metal-purification","tag-alumina-ceramic-foam-filter-for-molten-aluminum-filtration","tag-alumina-ceramic-foam-filter-manufacturers","tag-alumina-ceramic-foam-filter-porous-ceramic-filter","tag-alumina-filter-ceramic-foam-for-precision-casting-filter","tag-aluminium-ceramic-foam-filter-purchasing","tag-aluminum-casting-using-alumina-ceramic-foam-filter","tag-ceralu-ai203-ceramic-foam-filters-for-aluminum","tag-ceramic-foam-filter-cff-a-for-aluminum-casting","tag-ceramic-foam-filter-with-fiber-blanket-sides","tag-china-ceramic-foam-filter-cff","tag-foam-filters-with-gasket","tag-industrial-filters-for-filtration-of-molten-aluminium","tag-molten-metal-cleanliness-when-casting-aluminium","tag-porous-silicon-carbide-ceramic-foam-filter","tag-produce-alumina-ceramic-foam-filters","tag-produce-aluminium-casting-ceramic-foam-filters","tag-sell-ceramic-foam-filters","tag-specifics-of-aluminium-alloys-filtration","tag-square-porous-alumina-ceramic-foam-filter","tag-zirconia-ceramic-foam-filter"],"yoast_head":"<!-- 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