{"id":19323,"date":"2022-09-14T02:05:31","date_gmt":"2022-09-14T02:05:31","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=19323"},"modified":"2022-09-14T02:17:16","modified_gmt":"2022-09-14T02:17:16","slug":"deep-bed-filters","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/deep-bed-filters\/","title":{"rendered":"filtros de leito profundo"},"content":{"rendered":"

\u201cfiltros de leito profundo<\/a>\u201d<\/p>\n

\"filtros
filtros de leito profundo<\/figcaption><\/figure>\n

Outro indicador do desempenho da espuma \u00e9 a porosidade, que corresponde \u00e0 rela\u00e7\u00e3o entre o volume das c\u00e9lulas abertas da espuma e o volume total da espuma, geralmente expressa em porcentagem. A pr\u00e1tica mostra que a porosidade da mesma espuma com diferentes valores de PPI \u00e9 muito semelhante. O m\u00e9todo de c\u00e1lculo da porosidade \u00e9 o seguinte.<\/p>\n

P = (A - B) \/ A \u00d7 100%<\/p>\n

P-Porosidade<\/p>\n

Peso da A-Foam sem c\u00e9lulas abertas<\/p>\n

Peso do B-Foam ap\u00f3s a abertura<\/p>\n

\"\"<\/p>\n

Figura 1: Diagrama esquem\u00e1tico das especifica\u00e7\u00f5es da espuma<\/p>\n

\"\"<\/p>\n

Figura 2: Diagrama esquem\u00e1tico do m\u00e9todo do fluxo de ar<\/p>\n

Tabela 1: Exemplos de poros de diferentes tamanhos em espuma de 17\u201d<\/p>\n

\"\"<\/p>\n

Al\u00e9m dos problemas mencionados acima, as espumas nacionais tamb\u00e9m apresentam poros de tamanhos diferentes e formas irregulares. Portanto, quando a mesma pe\u00e7a de espuma \u00e9 cortada em diferentes dire\u00e7\u00f5es, a superf\u00edcie apresentar\u00e1 diferentes valores de \u201cPPI\u201d, e a mesma pe\u00e7a de espuma apresentar\u00e1 poros de tamanhos diferentes em superf\u00edcies diferentes. Atualmente, n\u00e3o existe na China nenhum instrumento para medir a permeabilidade ao ar da espuma. A especifica\u00e7\u00e3o da espuma ainda utiliza o m\u00e9todo de medi\u00e7\u00e3o tradicional. A especifica\u00e7\u00e3o da espuma fornecida pelo fabricante serve apenas como refer\u00eancia. unidade de desgaseifica\u00e7\u00e3o<\/a><\/p>\n

1.2 As propriedades mec\u00e2nicas e a qualidade da superf\u00edcie da placa de filtro cer\u00e2mica para lama t\u00eam uma rela\u00e7\u00e3o direta com a lama. Os requisitos gerais para a lama utilizada na fabrica\u00e7\u00e3o da filtro cer\u00e2mico poroso<\/a>: (1) Deve ter uma viscosidade adequada; se a viscosidade for muito baixa e a lama absorvida pela espuma for insuficiente, isso far\u00e1 com que a resist\u00eancia da placa filtrante diminua e a densidade espec\u00edfica caia; por outro lado, se a viscosidade for muito alta, a resist\u00eancia pode ser melhorada, mas isso causar\u00e1 muitos poros obstru\u00eddos e pode at\u00e9 fazer com que a superf\u00edcie solte esc\u00f3ria. Se estiver muito alta ou muito baixa, deve ser ajustada a tempo. (2) A lama deve ter certa fluidez para garantir que seja f\u00e1cil de ser injetada e retirada quando a espuma estiver impregnada. (3) As principais mat\u00e9rias-primas que comp\u00f5em a lama devem apresentar um certo grau de hidrofilicidade para garantir que a lama forme uma pasta suspensa uniforme. Se a hidrofilicidade for insuficiente, os s\u00f3lidos na lama precipitar\u00e3o facilmente e permanecer\u00e3o na espuma durante o processo de imers\u00e3o, resultando em poros mortos e maior fragilidade da placa filtrante. As especifica\u00e7\u00f5es dos ingredientes e das mat\u00e9rias-primas t\u00eam influ\u00eancia decisiva no desempenho da pasta. Mesmo que a mesma mat\u00e9ria-prima tenha especifica\u00e7\u00f5es ligeiramente diferentes, a resist\u00eancia \u00e0 deforma\u00e7\u00e3o, a resist\u00eancia \u00e0 compress\u00e3o e a fragilidade superficial dos produtos acabados ser\u00e3o muito diferentes.<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

“deep bed filters” Another measure of foam performance is the porosity of the foam, which is the ratio of the volume of the open cells…<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[13243],"class_list":["post-19323","post","type-post","status-publish","format-standard","hentry","category-blog","tag-deep-bed-filters"],"yoast_head":"\ndeep bed filters, degassing unit, porous ceramic filter<\/title>\n<meta name=\"description\" content=\"deep bed filters, In addition to the problems mentioned above, domestic foams also have holes of different sizes and irregular shapes.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alalloycasting.com\/pt\/deep-bed-filters\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" 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