{"id":7485,"date":"2021-01-12T08:22:10","date_gmt":"2021-01-12T08:22:10","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7485"},"modified":"2021-01-12T08:22:10","modified_gmt":"2021-01-12T08:22:10","slug":"ceramic-filters-for-aluminum-foundry","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/ceramic-filters-for-aluminum-foundry\/","title":{"rendered":"Filtros cer\u00e2micos para fundi\u00e7\u00e3o de alum\u00ednio"},"content":{"rendered":"

Os filtros de espuma cer\u00e2mica apresentam as seguintes vantagens: boa estabilidade qu\u00edmica, alta resist\u00eancia espec\u00edfica, resist\u00eancia a altas temperaturas, resist\u00eancia ao choque t\u00e9rmico, grande \u00e1rea superficial espec\u00edfica, bom efeito de remo\u00e7\u00e3o de esc\u00f3ria, opera\u00e7\u00e3o simples, f\u00e1cil integra\u00e7\u00e3o com outras pe\u00e7as e baixo custo. Por isso, a filtragem de metal fundido por meio de filtros de espuma cer\u00e2mica tornou-se um m\u00e9todo convencional de purifica\u00e7\u00e3o em fundi\u00e7\u00f5es de alum\u00ednio.<\/p>\n

A tecnologia de filtragem de metal fundido por meio de filtros de espuma cer\u00e2mica surgiu na d\u00e9cada de 1970 e tem sido amplamente utilizada nos Estados Unidos, no Canad\u00e1, no Jap\u00e3o, na Fran\u00e7a, na Austr\u00e1lia e na Su\u00ed\u00e7a.<\/p>\n

Nos \u00faltimos anos, foram estudadas algumas novas tecnologias para a purifica\u00e7\u00e3o do alum\u00ednio fundido, como o processamento din\u00e2mico a v\u00e1cuo, a purifica\u00e7\u00e3o por desgaseifica\u00e7\u00e3o cont\u00ednua por ultrassom, os filtros de cer\u00e2mica de corindo, etc., e elas t\u00eam apresentado bons resultados. No entanto, esses m\u00e9todos t\u00e9cnicos s\u00e3o relativamente complexos e onerosos, sendo dif\u00edcil promov\u00ea-los em larga escala na produ\u00e7\u00e3o.<\/p>\n

Quanto \u00e0 filtragem por filtro met\u00e1lico e tela de fibra, apenas as grandes inclus\u00f5es na massa fundida da liga de alum\u00ednio podem ser removidas, mas as inclus\u00f5es com tamanho inferior a micr\u00f4metros n\u00e3o podem ser removidas. O filtro met\u00e1lico tamb\u00e9m contamina a liga de alum\u00ednio. O uso de filtros de espuma cer\u00e2mica em fundi\u00e7\u00f5es de alum\u00ednio permite filtrar inclus\u00f5es finas e melhorar significativamente as propriedades mec\u00e2nicas e a qualidade est\u00e9tica das pe\u00e7as fundidas.<\/p>\n

\"Filtros<\/p>\n

O uso dos materiais adequados para altas temperaturas ter\u00e1 um impacto positivo na sua produtividade! A AdTech oferece filtros de espuma cer\u00e2mica de alumina<\/a> para fundi\u00e7\u00e3o de alum\u00ednio.<\/p>\n

Os filtros de espuma cer\u00e2mica especialmente projetados pela AdTech s\u00e3o fabricados a partir da mat\u00e9ria-prima b\u00e1sica \u00f3xido de alum\u00ednio. S\u00e3o produzidos com porosidades que variam de 10 a 60 poros por polegada (PPI). Al\u00e9m disso, s\u00e3o oferecidos conjuntos combinados com porosidade de 20 a 30 PPI, sendo poss\u00edveis outras op\u00e7\u00f5es. S\u00e3o fabricados filtros de diferentes tamanhos e sob medida, de acordo com as especifica\u00e7\u00f5es.<\/p>\n

O filtro de espuma cer\u00e2mica de alumina possui uma rede multicamadas e orif\u00edcios multidimensionais, e esses orif\u00edcios se comunicam entre si. Durante a filtra\u00e7\u00e3o, o alum\u00ednio fundido transporta inclus\u00f5es ao longo dos canais sinuosos e poros. Quando o alum\u00ednio fundido entra em contato com o esqueleto de espuma da placa filtrante, ele \u00e9 diretamente interceptado, adsorvido e depositado. Quando o metal fundido flui pelo orif\u00edcio, o canal da placa filtrante \u00e9 curvado, e o metal fundido que passa pelo canal muda a dire\u00e7\u00e3o do fluxo; as inclus\u00f5es colidem com a parede do orif\u00edcio e aderem firmemente a ela.<\/p>","protected":false},"excerpt":{"rendered":"

The ceramic foam filters have the advantages of good chemical stability, high specific strength, high-temperature resistance, thermal shock resistance, large specific surface area, good slag…<\/p>","protected":false},"author":1,"featured_media":7486,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-7485","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nCeramic Filters for Aluminum Foundry -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Ceramic filters molten metal filtration have become a conventional purification method in aluminum foundry. 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