{"id":8331,"date":"2021-04-06T08:50:41","date_gmt":"2021-04-06T08:50:41","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8331"},"modified":"2021-04-06T08:50:41","modified_gmt":"2021-04-06T08:50:41","slug":"foam-ceramic-filter-medium","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/foam-ceramic-filter-medium\/","title":{"rendered":"Meio filtrante cer\u00e2mico de espuma"},"content":{"rendered":"<p>No final da d\u00e9cada de 1970, os Estados Unidos desenvolveram um Filtro de Espuma Cer\u00e2mica (CFF) feito de alumina e \u00f3xido de cromo. Ele n\u00e3o s\u00f3 apresenta um bom efeito de purifica\u00e7\u00e3o, como tamb\u00e9m \u00e9 pr\u00e1tico de usar. Quando o alum\u00ednio fundido passa por ele, \u00e9 necess\u00e1ria apenas uma diferen\u00e7a de press\u00e3o de 100 a 150 mm. Ap\u00f3s a passagem, basta manter uma diferen\u00e7a de press\u00e3o de 2 a 10 mm. Seu princ\u00edpio de purifica\u00e7\u00e3o \u00e9 o mesmo da filtragem por tubos cer\u00e2micos, e sua porosidade chega a 80%-90%. Portanto, o meio filtrante de cer\u00e2mica espumosa possui grande capacidade de vaz\u00e3o e \u00e9 adequado para a purifica\u00e7\u00e3o por filtra\u00e7\u00e3o na produ\u00e7\u00e3o de lingotes por fundi\u00e7\u00e3o semicont\u00ednua e na produ\u00e7\u00e3o de laminados por fundi\u00e7\u00e3o cont\u00ednua.<\/p>\n<p>Um filtro de cer\u00e2mica em espuma \u00e9 um dispositivo de filtragem que utiliza cer\u00e2mica em espuma como meio filtrante. Ele \u00e9 instalado na caixa de filtragem do sistema de inje\u00e7\u00e3o de metal fundido, entre o forno est\u00e1tico e a mesa de fundi\u00e7\u00e3o, para fins de filtragem.<\/p>\n<p>A escolha do filtro cer\u00e2mico de espuma depende da precis\u00e3o da filtragem. Geralmente, <a href=\"http:\/\/www.alalloycasting.com\/pt\/30ppi-cff-filter\/\">Filtro CFF de 30 PPI<\/a> pode atender aos requisitos de purifica\u00e7\u00e3o do alum\u00ednio l\u00edquido. Se o alum\u00ednio l\u00edquido estiver sujo, pode-se utilizar um filtro de 20 PPI para pr\u00e9-filtragem, a fim de evitar o entupimento prematuro do filtro de poros. Esse tipo de filtro de grande di\u00e2metro tamb\u00e9m \u00e9 comumente utilizado no canal de vaz\u00e3o que vai do forno ao forno de repouso, e o tamanho do filtro \u00e9 determinado de acordo com a velocidade de fundi\u00e7\u00e3o e a vaz\u00e3o do metal por unidade de tempo.<\/p>\n<p>Normalmente, o filtro de cer\u00e2mica em espuma \u00e9 disposto horizontalmente na caixa de filtragem, permitindo que a \u00e1gua com alum\u00ednio passe na vertical. Quando a \u00e1gua com alum\u00ednio sobe de maneira uniforme, o risco de canaliza\u00e7\u00e3o \u00e9 reduzido. Al\u00e9m disso, ao instalar a cer\u00e2mica em espuma, as pe\u00e7as de montagem devem ser vedadas com fibras resistentes ao fogo para eliminar qualquer possibilidade de desvio.<\/p>\n<p>\u00c9 melhor aquecer a cer\u00e2mica espumosa com um aquecedor radiante at\u00e9 a temperatura de fus\u00e3o antes da filtragem, a fim de garantir que o alum\u00ednio l\u00edquido flua para a cer\u00e2mica espumosa sem que o metal se solidifique e bloqueie o orif\u00edcio.<\/p>","protected":false},"excerpt":{"rendered":"<p>In the late 1970s, the United States developed a Ceramic Foam Filter (CFF) made of alumina and chromium oxide. It not only has a good&hellip;<\/p>","protected":false},"author":1,"featured_media":8334,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8331","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 Ceramic Filter Medium -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Foam ceramic filter medium has a large flow capacity and is suitable for filtration purification in aluminum alloy casting production.\" \/>\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\/pt\/foam-ceramic-filter-medium\/\" \/>\n<meta property=\"og:locale\" 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