{"id":9239,"date":"2021-06-19T08:25:52","date_gmt":"2021-06-19T08:25:52","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9239"},"modified":"2021-06-18T08:30:38","modified_gmt":"2021-06-18T08:30:38","slug":"filters-for-cast-alloys","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/filters-for-cast-alloys\/","title":{"rendered":"Filtros para ligas fundidas"},"content":{"rendered":"<p>Os filtros de espuma cer\u00e2mica para ligas de fundi\u00e7\u00e3o s\u00e3o a forma mais eficaz de filtragem de metal fundido.<\/p>\n<p>A ind\u00fastria mundial estabelece continuamente novos requisitos quanto \u00e0 qualidade de produtos de alta tecnologia, como chapas para latas e substratos de alum\u00ednio para chapas de PS. No processamento e na produ\u00e7\u00e3o de alum\u00ednio, s\u00e3o necess\u00e1rios filtros de espuma cer\u00e2mica, que removem inclus\u00f5es n\u00e3o met\u00e1licas do alum\u00ednio fundido e de suas ligas. Os requisitos b\u00e1sicos para filtros destinados a ligas fundidas s\u00e3o:<\/p>\n<ul>\n<li>O filtro \u00e9 capaz de remover com efic\u00e1cia as inclus\u00f5es met\u00e1licas do alho-por\u00f3.<\/li>\n<li>O filtro deve garantir a velocidade normal de fundi\u00e7\u00e3o do metal.<\/li>\n<li>A superf\u00edcie do filtro deve ser irregular, apresentar certa estabilidade qu\u00edmica e boa resist\u00eancia ao choque t\u00e9rmico.<\/li>\n<li>Quando entra em contato com o alum\u00ednio fundido, ele n\u00e3o o danifica, n\u00e3o explode nem o contamina.<\/li>\n<li>Custo mais baixo.<\/li>\n<\/ul>\n<p>Essas condi\u00e7\u00f5es n\u00e3o s\u00e3o independentes umas das outras nem totalmente compat\u00edveis. Por exemplo, se a velocidade de passagem do alum\u00ednio fundido for aumentada, o efeito de filtragem ser\u00e1 prejudicado. Os filtros para ligas fundidas podem reduzir a resist\u00eancia ao fluxo do metal fundido aumentando o tamanho dos poros e o n\u00famero de orif\u00edcios, ou reduzindo a espessura da malha do filtro. Portanto, o projeto do filtro deve levar em considera\u00e7\u00e3o sua estrutura, a resist\u00eancia ao fluxo, bem como o melhor efeito de filtragem e a melhor qualidade de fundi\u00e7\u00e3o.<\/p>\n<p>O material de espuma cer\u00e2mica \u00e9 um novo tipo de material, que pode ser fabricado em diversos tamanhos e formatos para atender \u00e0s necessidades relacionadas \u00e0s caracter\u00edsticas e aos efeitos de filtragem.<\/p>\n<p>O <a href=\"http:\/\/www.alalloycasting.com\/pt\/foam-ceramic-filter-medium\/\">filtro de espuma cer\u00e2mica (CFF)<\/a> consiste em uma pe\u00e7a de espuma cer\u00e2mica de c\u00e9lula aberta com diferentes espessuras e \u00e1reas de se\u00e7\u00e3o transversal. Normalmente, apresenta um vazio interconectado de 85% em volume. A finura do filtro varia, geralmente entre 10, 20 e 30 PPI (poros por polegada linear), e h\u00e1 uma tend\u00eancia para poros finos (50, 60, 80 PPI). \u00c0 medida que o tamanho dos poros diminui, a efici\u00eancia e a confiabilidade do sistema de filtragem aumentam. Outra observa\u00e7\u00e3o interessante para a filtragem de metais muito puros \u00e9 que o filtro apresenta baixo desempenho com part\u00edculas de tamanho pequeno (15\u201330 m) em compara\u00e7\u00e3o com part\u00edculas na faixa de 30 a 60 m.<\/p>","protected":false},"excerpt":{"rendered":"<p>Ceramic foam filters for cast alloys are the most effective way for molten metal filtration. The industry in the world continuously puts forward new requirements&hellip;<\/p>","protected":false},"author":1,"featured_media":9240,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9239","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>Filters for Cast Alloys, Ceramic Foam Filter Molten Metal Filtration<\/title>\n<meta name=\"description\" content=\"Ceramic foam filters for cast alloys are the most effective way for molten metal filtration, used for high-tech products such as can blanks.\" \/>\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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