filtro de espuma cer\u00e2mica de alumina<\/a> Para o alum\u00ednio com 12 orif\u00edcios\/cm e espessura de 50 m, \u00e9 poss\u00edvel remover 80% de res\u00edduos e outros detritos com tamanho superior a 100 \u03bcm. A fim de melhorar a efici\u00eancia da filtragem, tamb\u00e9m \u00e9 poss\u00edvel utilizar primeiro uma malha de fibra de vidro para a filtragem grosseira e, em seguida, recorrer \u00e0 filtragem por filtro de cer\u00e2mica espumosa. Testes comprovaram que a filtragem do alum\u00ednio l\u00edquido pode reduzir a taxa de quebra da folha de alum\u00ednio de 6 \u03bcm de espessura em 44% durante a lamina\u00e7\u00e3o de acabamento. As placas de cer\u00e2mica espumada s\u00e3o geralmente substitu\u00eddas uma vez por fornada para garantir a capacidade de passagem do alum\u00ednio fundido e impedir que os res\u00edduos e part\u00edculas de esc\u00f3ria depositados nos poros voltem a entrar no alum\u00ednio fundido.<\/p>\n![\"Filtro](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/05\/Alumina-Ceramic-Foam-Filter-for-Aluminum.jpg\")
<\/p>\n
A filtra\u00e7\u00e3o por bolo \u00e9 o mecanismo mais comum no qual os filtros de cer\u00e2mica espumosa para fundi\u00e7\u00e3o atuam como uma peneira e ret\u00eam part\u00edculas maiores do que o tamanho de seus poros na superf\u00edcie do filtro. Essas part\u00edculas retidas formam, ent\u00e3o, uma camada que captura part\u00edculas menores do que a abertura do filtro. \u00c0 medida que o bolo se acumula na superf\u00edcie do filtro, o processo continua. Assim que o bolo come\u00e7a a se formar, o filtro original serve apenas como suporte para o bolo, realizando assim a filtra\u00e7\u00e3o efetiva do material fundido. Com o ac\u00famulo do bolo de filtra\u00e7\u00e3o, a queda de press\u00e3o de todo o filtro aumentar\u00e1, e a vaz\u00e3o diminuir\u00e1 ou cessar\u00e1 abruptamente. Nesse est\u00e1gio, considera-se que o filtro est\u00e1 obstru\u00eddo ou entupido.<\/p>\n
Filtra\u00e7\u00e3o em leito profundo<\/a> ocorre dentro do filtro de espuma para fundi\u00e7\u00e3o de cer\u00e2mica<\/a> \u00e0 medida que o metal flui pelo orif\u00edcio do filtro. As part\u00edculas s\u00e3o retidas e mantidas pela for\u00e7a eletrost\u00e1tica ao entrarem em contato com a parede do orif\u00edcio. As part\u00edculas retidas s\u00e3o geralmente significativamente menores do que o tamanho dos poros do filtro. Isso ocorre porque os leigos n\u00e3o conseguem compreender por que filtros aparentemente grosseiros s\u00e3o extremamente eficazes na remo\u00e7\u00e3o de inclus\u00f5es de todos os tamanhos. Todas as condi\u00e7\u00f5es necess\u00e1rias para que a for\u00e7a eletrost\u00e1tica fixe essas part\u00edculas de grandes dimens\u00f5es \u00e0 parede do orif\u00edcio do filtro dependem do estabelecimento do contato. Se o peso das part\u00edculas for grande demais para que elas sigam facilmente o trajeto do fluxo do metal l\u00edquido, esse contato pode ocorrer devido \u00e0 precipita\u00e7\u00e3o. O segundo modo de contato \u00e9 o impacto direto, e o terceiro \u00e9 o efeito de redu\u00e7\u00e3o da velocidade causado pelo atrito na superf\u00edcie da parede do orif\u00edcio.<\/p>","protected":false},"excerpt":{"rendered":"Aluminum liquid filtration generally uses alumina ceramic foam filter filtration. When the aluminum liquid passes through the tortuous and interconnected pores in the foam ceramic,…<\/p>","protected":false},"author":1,"featured_media":8973,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-8972","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ceramic-foam-filter"],"yoast_head":"\n
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