{"id":10244,"date":"2021-09-10T05:58:29","date_gmt":"2021-09-10T05:58:29","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10244"},"modified":"2021-09-10T05:58:29","modified_gmt":"2021-09-10T05:58:29","slug":"foundries-filters","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/foundries-filters\/","title":{"rendered":"Filtros para fundi\u00e7\u00f5es"},"content":{"rendered":"

O alum\u00ednio fundido passa pelos filtros das fundi\u00e7\u00f5es, de modo que as part\u00edculas de impurezas presentes no material fundido sejam retidas pela superf\u00edcie do meio filtrante ou capturadas no interior do mesmo, com o objetivo de purificar o alum\u00ednio fundido.<\/p>\n

Embora a maioria das inclus\u00f5es de esc\u00f3ria seja removida da massa fundida de alum\u00ednio durante o refinamento, algumas part\u00edculas finas de esc\u00f3ria, especialmente aquelas com tamanho inferior a alguns m\u00edcrons, s\u00e3o dif\u00edceis de remover por meio do refinamento em forno e do refinamento em linha, permanecendo em suspens\u00e3o na massa fundida de alum\u00ednio. \u00c9 necess\u00e1rio um rigoroso tratamento de filtragem antes da fundi\u00e7\u00e3o e da lamina\u00e7\u00e3o.<\/p>\n

Existem diversos filtros de fundi\u00e7\u00e3o para a filtragem de alum\u00ednio fundido, principalmente o filtro de tubo de corindo e o filtro de leito profundo, meio filtrante de cer\u00e2mica em espuma<\/a> e assim por diante. Atualmente, o filtro de cer\u00e2mica espumosa \u00e9 o mais utilizado. Ele possui uma estrutura porosa homog\u00eanea, alta resist\u00eancia superficial, resist\u00eancia \u00e0 temperatura de at\u00e9 1.100 \u00b0C e excelente resist\u00eancia aos produtos qu\u00edmicos utilizados em fundi\u00e7\u00f5es.<\/p>\n

\"Filtro<\/p>\n

As diferentes f\u00e1bricas de alum\u00ednio t\u00eam condi\u00e7\u00f5es de fundi\u00e7\u00e3o distintas; por isso, os filtros utilizados tamb\u00e9m s\u00e3o diferentes.<\/p>\n

Em compara\u00e7\u00e3o com a fundi\u00e7\u00e3o e a lamina\u00e7\u00e3o, o processo de produ\u00e7\u00e3o da fundi\u00e7\u00e3o \u00e9 mais complexo. A vaz\u00e3o \u00e9 elevada, e a filtragem \u00e9 realizada da mesma forma que na produ\u00e7\u00e3o de fundi\u00e7\u00e3o-lamina\u00e7\u00e3o. A vaz\u00e3o do filtro \u00e9 equivalente a mais de 2,5 a 3,5 vezes a da fundi\u00e7\u00e3o-lamina\u00e7\u00e3o, o que reduz o efeito de filtragem. Portanto, para garantir a mesma efici\u00eancia de filtragem, a \u00e1rea de passagem do filtro deve ser aumentada, de modo que a vaz\u00e3o por unidade de \u00e1rea do filtro seja igual \u00e0 do processo de fundi\u00e7\u00e3o-lamina\u00e7\u00e3o.<\/p>\n

As ligas de duralum\u00ednio e as ligas de alum\u00ednio super-duras t\u00eam maior probabilidade de conter min\u00fasculas part\u00edculas de esc\u00f3ria do que o alum\u00ednio puro e as ligas macias. Por esse motivo, a efici\u00eancia da filtra\u00e7\u00e3o deve ser significativamente melhorada para atingir o objetivo de alta pureza da massa fundida e garantir a qualidade do produto final. Portanto, \u00e9 recomend\u00e1vel adotar um filtro tubular, que n\u00e3o apenas aumenta a \u00e1rea de superf\u00edcie do filtro em contato com a fus\u00e3o, mas tamb\u00e9m reduz a vaz\u00e3o por unidade de \u00e1rea da fus\u00e3o, garante a efici\u00eancia da filtra\u00e7\u00e3o e a vaz\u00e3o total, al\u00e9m de atender \u00e0s necessidades de produ\u00e7\u00e3o. Isso aumenta a queda de press\u00e3o inicial da massa fundida filtrada, o que aumenta a dificuldade da opera\u00e7\u00e3o e, ao mesmo tempo, eleva o custo da filtragem.<\/p>","protected":false},"excerpt":{"rendered":"

The aluminum melt passes through foundries filters, so that the impurity particles in the melt are intercepted by the surface of the filter medium or…<\/p>","protected":false},"author":1,"featured_media":10246,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12668,12669],"class_list":["post-10244","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-foundries-filters","tag-molten-aluminum-filtering-equipment"],"yoast_head":"\nFoundries Filters, Molten Aluminum Filtering Equipment<\/title>\n<meta name=\"description\" content=\"The aluminum melt passes through foundries filters, so that the impurity particles in the melt are intercepted by the surface of the filter.\" \/>\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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