{"id":11544,"date":"2021-11-29T07:24:49","date_gmt":"2021-11-29T07:24:49","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11544"},"modified":"2021-11-29T07:24:49","modified_gmt":"2021-11-29T07:24:49","slug":"foam-filters","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/foam-filters\/","title":{"rendered":"Filtros de espuma"},"content":{"rendered":"

A filtragem de metal fundido \u00e9 uma pr\u00e1tica comum na ind\u00fastria. Em particular, o uso de filtros de espuma com malha para filtrar alum\u00ednio fundido tem sido amplamente adotado nesse campo. Como todos sabemos, a resist\u00eancia ao fogo e a estabilidade qu\u00edmica do material filtrante s\u00e3o essenciais para obter uma filtragem eficaz das part\u00edculas de inclus\u00e3o e para evitar que produtos de rea\u00e7\u00e3o do material filtrante sejam liberados como contaminantes no metal fundido.<\/p>\n

O uso da s\u00edlica como material refrat\u00e1rio em espuma seria desej\u00e1vel, pois ela tende a ser barata e f\u00e1cil de processar. A s\u00edlica tamb\u00e9m apresenta baixa expans\u00e3o t\u00e9rmica e baixo m\u00f3dulo de compress\u00e3o. Infelizmente, sabe-se que ela apresenta alta reatividade em ligas de alum\u00ednio fundidas, especialmente nas que cont\u00eam magn\u00e9sio.<\/p>\n

A s\u00edlica presente no material particulado do filtro de espuma reticulada \u00e9 facilmente corro\u00edda pelo alum\u00ednio ou pelo magn\u00e9sio. Evite o uso de s\u00edlica ao filtrar alum\u00ednio fundido, magn\u00e9sio ou suas ligas.<\/p>\n

H\u00e1 muito tempo existe a necessidade de um material refrat\u00e1rio que seja relativamente barato, resistente em condi\u00e7\u00f5es de filtra\u00e7\u00e3o, n\u00e3o reativo e que possa ser utilizado em diversas ligas de alum\u00ednio, incluindo, especialmente, as ligas de alum\u00ednio que cont\u00eam magn\u00e9sio.<\/p>\n

\"Filtro<\/p>\n

Os filtros de espuma reticulada que utilizam part\u00edculas de agregado de alumina t\u00eam sido comumente empregados para filtrar alum\u00ednio e ligas de alum\u00ednio. Filtros sinterizados aglomerados de alta pureza filtros de alumina<\/a> Os sistemas de filtragem que utilizam ligantes \u00e0 base de hidrato de alumina tamb\u00e9m s\u00e3o bem conhecidos. Esses filtros apresentam excelente resist\u00eancia qu\u00edmica ao ataque do magn\u00e9sio.<\/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. Nosso filtro de espuma cer\u00e2mica de alumina utiliza espuma de alta qualidade e cer\u00e2mica de alta pureza como mat\u00e9ria-prima, sendo capaz de remover com efic\u00e1cia as impurezas s\u00f3lidas n\u00e3o met\u00e1licas do alum\u00ednio fundido e das ligas de alum\u00ednio em sua ind\u00fastria de fundi\u00e7\u00e3o de alum\u00ednio.<\/p>\n

S\u00e3o fabricados com porosidades que variam de 10 a 60 poros por polegada (PPI). Al\u00e9m disso, os conjuntos combinados s\u00e3o produzidos com 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>","protected":false},"excerpt":{"rendered":"

The filtration of molten metal is a common practice in the industry. In particular, the use of mesh foam filters to filter molten aluminum has…<\/p>","protected":false},"author":1,"featured_media":11547,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-11544","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nFoam Filters for Molten Aluminum and Aluminum Alloy<\/title>\n<meta name=\"description\" content=\"The filtration of molten metal is a common practice in the industry. 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