{"id":6789,"date":"2020-12-02T07:59:22","date_gmt":"2020-12-02T07:59:22","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6789"},"modified":"2020-12-02T07:59:22","modified_gmt":"2020-12-02T07:59:22","slug":"molten-metal-foam-ceramic-filter","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/molten-metal-foam-ceramic-filter\/","title":{"rendered":"Filtro cer\u00e2mico de espuma de metal fundido"},"content":{"rendered":"<p>O filtro cer\u00e2mico de espuma para metal fundido possui uma estrutura de c\u00e9lulas abertas e uma pluralidade de vazios interconectados, envoltos por uma malha de fibra cer\u00e2mica. A estrutura porosa do filtro auxilia na filtragem do metal fundido. O metal fundido \u00e9 vertido em um filtro de espuma cer\u00e2mica para remover os s\u00f3lidos arrastados do metal fundido. A permeabilidade ao ar do filtro \u00e9 de 400 a 8.000 \u00d7 10\u207b\u2077 cm\u00b2, a porosidade \u00e9 de 0,80 a 0,95, o tamanho dos poros \u00e9 de 5 a 45 poros por polegada linear e a espessura varia de 1\/4 a 4 polegadas.<\/p>\n<p>O alum\u00ednio fundido geralmente cont\u00e9m s\u00f3lidos arrastados, que s\u00e3o prejudiciais ao produto final de metal fundido. Esses s\u00f3lidos arrastados geralmente prov\u00eam de tr\u00eas fontes. Alguns s\u00e3o part\u00edculas de alumina; a camada de \u00f3xido flutuante na superf\u00edcie as suga para dentro do fluxo l\u00edquido, e algumas das part\u00edculas arrastadas s\u00e3o fragmentos do revestimento do forno, <a href=\"http:\/\/www.alalloycasting.com\/pt\/casting-launder-2\/\">calha transportadora<\/a>, e outras partes do equipamento de processamento de alum\u00ednio fundido, que sofrem eros\u00e3o e s\u00e3o arrastadas para dentro do forno. No fluxo de alum\u00ednio, algumas part\u00edculas correspondem \u00e0 precipita\u00e7\u00e3o de impurezas insol\u00faveis, tais como a precipita\u00e7\u00e3o de compostos intermet\u00e1licos, boretos, carbonetos ou outros compostos de alum\u00ednio (como o cloreto). Quando essas impurezas aparecem no produto fundido final ap\u00f3s a solidifica\u00e7\u00e3o do alum\u00ednio fundido, elas podem causar uma diminui\u00e7\u00e3o da ductilidade do produto final ou prejudicar as caracter\u00edsticas de acabamento do mesmo. Portanto, \u00e9 desej\u00e1vel remover os s\u00f3lidos arrastados do fluxo de alum\u00ednio fundido antes de mold\u00e1-lo em um s\u00f3lido, que pode ser utilizado tal como est\u00e1 ou submetido a opera\u00e7\u00f5es de conforma\u00e7\u00e3o, como lamina\u00e7\u00e3o, forjamento, extrus\u00e3o e similares.<\/p>\n<p>O processo de filtragem para remo\u00e7\u00e3o de s\u00f3lidos arrastados do l\u00edquido \u00e9 realizado por meio de meios filtrantes porosos. Geralmente, a filtragem de metais fundidos, especialmente o alum\u00ednio, apresenta problemas espec\u00edficos, pois esses l\u00edquidos s\u00e3o muito agressivos e \u00e9 dif\u00edcil encontrar um meio filtrante capaz de resistir a eles.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6795\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/12\/Molten-Metal-Foam-Ceramic-Filter-2.jpg\" alt=\"Filtro cer\u00e2mico de espuma de metal fundido\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/12\/Molten-Metal-Foam-Ceramic-Filter-2.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/12\/Molten-Metal-Foam-Ceramic-Filter-2-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Geralmente, s\u00e3o utilizados dois m\u00e9todos de filtragem para remover s\u00f3lidos arrastados das ligas de alum\u00ednio fundidas antes da fundi\u00e7\u00e3o. O meio filtrante mais comum \u00e9 uma tela de tecido de vidro de malha aberta, colocada em um tanque de transfer\u00eancia de metal, pr\u00f3ximo ao bico ou na po\u00e7a de metal fundido, sobre o lingote solidificado. Esses filtros s\u00f3 conseguem remover inclus\u00f5es de tamanho maior do metal e se rompem facilmente durante o uso, pois as fibras de vidro ficam muito fr\u00e1geis \u00e0 temperatura do alum\u00ednio fundido. Em outro m\u00e9todo da t\u00e9cnica anterior, o alum\u00ednio fundido \u00e9 filtrado por meio de um leito de part\u00edculas soltas de alumina, como a alumina tabular, mas frequentemente apresenta as desvantagens normalmente associadas aos filtros de leito, a saber: permite a passagem de uma quantidade excessiva de s\u00f3lidos, e h\u00e1 uma forte tend\u00eancia. A forma\u00e7\u00e3o de canais para uso eficaz \u00e9 impedida, e o tamanho dos poros do filtro n\u00e3o \u00e9 f\u00e1cil de controlar, mas \u00e9 f\u00e1cil de se alterar nas condi\u00e7\u00f5es de uso, de modo que, mesmo que o tamanho inicial seja adequado, ele n\u00e3o pode ser mantido de forma eficaz. Al\u00e9m disso, quando o filtro n\u00e3o est\u00e1 em uso, o metal deve ser mantido em estado fundido constante.<\/p>\n<p>A AdTech oferece uma vers\u00e3o aprimorada <a href=\"http:\/\/www.alalloycasting.com\/pt\/ceramic-foam-filter-suppliers\/\">filtro de espuma cer\u00e2mica<\/a> para filtrar e remover s\u00f3lidos arrastados da liga de alum\u00ednio fundida. O filtro cer\u00e2mico de espuma para metal fundido utiliza um material com estrutura de c\u00e9lulas abertas e se caracteriza pelo fato de que uma pluralidade de vazios interconectados \u00e9 envolvida por uma malha cer\u00e2mica. O uso do filtro de espuma cer\u00e2mica melhora significativamente a efici\u00eancia da filtra\u00e7\u00e3o. O material de espuma cer\u00e2mica de alta efici\u00eancia para filtragem de metal fundido \u00e9 caracterizado por maior confiabilidade em termos de resist\u00eancia. O meio filtrante cer\u00e2mico poroso apresenta alta resist\u00eancia e baixo custo.<\/p>","protected":false},"excerpt":{"rendered":"<p>Molten metal foam ceramic filter has an open-cell structure and a plurality of interconnected voids surrounded by ceramic fiber mesh. The porous structure of the&hellip;<\/p>","protected":false},"author":1,"featured_media":6793,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[645,4125,4127,378,753,1713,4682,653,811,1702,1714,487,379,664,7287,4124,416,484,412,341,7288,756,409,824,754,1596,751],"class_list":["post-6789","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-aluminium-alloys-filtration","tag-aluminum-alloy-casting-filter","tag-ceramic-fiber-filters","tag-ceramic-filter-for-aluminum-foundry","tag-ceramic-foam-casting-filter","tag-ceramic-foam-filter-for-aluminum","tag-ceramic-foam-filter-for-casting","tag-ceramic-foam-filter-manufacturer","tag-ceramic-foam-filter-plate","tag-ceramic-foam-filter-supplier","tag-ceramic-foam-filtration","tag-cff-filter","tag-cff-filtration-mechanism","tag-filtration-in-foundries","tag-filtration-method","tag-foam-ceramic-casting-filter","tag-honeycomb-ceramic-filter","tag-liquid-aluminum-filter","tag-metal-foam-filter","tag-molten-aluminum-cff-filter","tag-molten-metal-filters-for-metallurgical-industry","tag-porous-ceramic-filtering-technology","tag-porous-ceramic-plate","tag-porous-ceramics-filtration","tag-porous-foam-ceramic-materials","tag-silicon-carbide-ceramic-filter","tag-zirconia-foam-ceramic-filter"],"yoast_head":"<!-- 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