{"id":6885,"date":"2020-12-08T03:52:32","date_gmt":"2020-12-08T03:52:32","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6885"},"modified":"2020-12-08T03:52:32","modified_gmt":"2020-12-08T03:52:32","slug":"foam-ceramic-filters-manufacturing-process","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/foam-ceramic-filters-manufacturing-process\/","title":{"rendered":"Processo de fabrica\u00e7\u00e3o de filtros cer\u00e2micos de espuma"},"content":{"rendered":"

O filtro de cer\u00e2mica em espuma \u00e9 fabricado por meio da tecnologia de replica\u00e7\u00e3o de espuma, que \u00e9 um m\u00e9todo convencional de produ\u00e7\u00e3o de espuma cer\u00e2mica utilizada como dispositivo de filtragem de metal fundido. No processo de fabrica\u00e7\u00e3o dos filtros de cer\u00e2mica em espuma, a pasta cer\u00e2mica \u00e9 revestida sobre a espuma de poliuretano e, em seguida, seca e queimada. Durante o processo de queima, a espuma de poliuretano revestida com a pasta cer\u00e2mica evapora, mas a estrutura cer\u00e2mica \u00e9 preservada, formando assim uma espuma cer\u00e2mica semelhante a um exoesqueleto que apresenta vazios nos locais onde antes havia o poliuretano. Essa estrutura consiste essencialmente na conex\u00e3o entre os pilares, com poros ao redor ou no interior deles.<\/p>\n

Processo de fabrica\u00e7\u00e3o de filtros cer\u00e2micos de espuma<\/h2>\n

A pasta utilizada \u00e9 selecionada de acordo com o material cer\u00e2mico empregado na aplica\u00e7\u00e3o. A pasta utilizada deve ser capaz de conferir ao produto final caracter\u00edsticas adequadas e deve possuir resist\u00eancia mec\u00e2nica suficiente para suportar condi\u00e7\u00f5es espec\u00edficas de alta temperatura. Al\u00e9m disso, a pasta apresenta fluidez relativamente alta, sendo prefer\u00edvel que a pasta utilizada no filtro seja composta por uma solu\u00e7\u00e3o aquosa de suspens\u00e3o cer\u00e2mica. Normalmente, a pasta cont\u00e9m \u00e1gua. A pasta tamb\u00e9m pode conter aditivos, como ligantes e surfactantes.<\/p>\n

O material de espuma el\u00e1stica \u00e9 impregnado com uma pasta cer\u00e2mica aquosa para formar um revestimento em forma de rede semelhante a fibras na superf\u00edcie do material de espuma el\u00e1stica, e as cavidades tamb\u00e9m s\u00e3o preenchidas. Normalmente, a espuma \u00e9 impregnada repetidamente com a pasta, sendo prensada entre duas impregna\u00e7\u00f5es para garantir a impregna\u00e7\u00e3o completa da espuma.<\/p>\n

\"Processo<\/p>\n

Pressione a espuma impregnada para extrair 25-75% da pasta, deixando para tr\u00e1s a parte da rede fibrosa que foi revestida com ela. Em opera\u00e7\u00e3o cont\u00ednua, a espuma impregnada pode ser passada por um rolo pr\u00e9-ajustado para descarregar a pasta da espuma, deixando a quantidade desejada para ser impregnada. Isso tamb\u00e9m pode ser feito simplesmente apertando manualmente o material de espuma el\u00e1stica at\u00e9 o grau desejado. Nesta etapa, a espuma ainda \u00e9 el\u00e1stica e forma uma estrutura adequada para a tarefa espec\u00edfica de filtra\u00e7\u00e3o. Com m\u00e9todos convencionais, \u00e9 necess\u00e1rio posicionar a espuma moldada corretamente at\u00e9 que o substrato polim\u00e9rico se decomponha ou at\u00e9 que a cer\u00e2mica seja sinterizada.<\/p>\n

Seque a espuma impregnada a uma temperatura de 35 a 700 \u00b0C por um per\u00edodo de 2 minutos a 6 horas. Ap\u00f3s a secagem, o material \u00e9 aquecido a alta temperatura para unir as part\u00edculas cer\u00e2micas, formando uma malha semelhante a fibras. O material impregnado e seco \u00e9 aquecido em duas etapas. A primeira etapa consiste no aquecimento a uma temperatura de 350 a 700 \u00b0C, mantendo-se nessa faixa de temperatura por 2 minutos a 6 horas, para que a rede el\u00e1stica de espuma se decomponha ou se volatilize. Essa etapa pode, obviamente, fazer parte do ciclo de secagem. A segunda etapa consiste no aquecimento a uma temperatura de 900 a 1.700 \u00b0C, mantendo-se nessa faixa de temperatura por 2 minutos a 10 horas para unir as cer\u00e2micas.<\/p>\n

O filtro de espuma cer\u00e2mica para alum\u00ednio fundido<\/a> possui uma estrutura de c\u00e9lulas abertas, caracterizada por numerosas cavidades interconectadas, envoltas por uma malha cer\u00e2mica. Dependendo da estrutura necess\u00e1ria para um determinado processo de filtragem de metal fundido, a espuma cer\u00e2mica pode apresentar qualquer estrutura desejada.<\/p>","protected":false},"excerpt":{"rendered":"

The foam ceramic filter\u00a0is made by foam replication technology, which is a conventional method of producing ceramic foam used as a molten metal filtering device.…<\/p>","protected":false},"author":1,"featured_media":6887,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[1720,1722,4125,1718,1724,4127,1717,1705,1726,753,1447,1713,811,1702,1735,1712,1731,1714,1727,4124,1441,1728,1700,1701,1710,1605,1475,417,416,341,1723,7288,1719,756,824,1446,754,1596,751,1709],"class_list":["post-6885","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-advanced-ceramic-filter","tag-alumina-ceramic-filter","tag-aluminum-alloy-casting-filter","tag-aluminum-casting-ceramic-foam-filter","tag-casting-ceramic-foam-filter","tag-ceramic-fiber-filters","tag-ceramic-filter-for-aluminum","tag-ceramic-filter-for-molten-aluminum","tag-ceramic-filter-manufacturing-process","tag-ceramic-foam-casting-filter","tag-ceramic-foam-filter-china","tag-ceramic-foam-filter-for-aluminum","tag-ceramic-foam-filter-plate","tag-ceramic-foam-filter-supplier","tag-ceramic-foam-filters-manufacturer","tag-ceramic-foam-filters-manufacturing-process","tag-ceramic-foam-filters-supplier","tag-ceramic-foam-filtration","tag-ceramic-foundry-filters","tag-foam-ceramic-casting-filter","tag-foam-ceramic-filter","tag-foam-ceramic-filter-manufacturing-process","tag-foam-ceramic-filter-plate","tag-foam-ceramic-filtration-mechanism","tag-foam-ceramics-applications","tag-foam-furnace-filter","tag-foundry-ceramic-filter","tag-foundry-filters","tag-honeycomb-ceramic-filter","tag-molten-aluminum-cff-filter","tag-molten-aluminum-filters","tag-molten-metal-filters-for-metallurgical-industry","tag-molten-metal-foam-filter","tag-porous-ceramic-filtering-technology","tag-porous-ceramics-filtration","tag-porous-filter-material","tag-porous-foam-ceramic-materials","tag-silicon-carbide-ceramic-filter","tag-zirconia-foam-ceramic-filter","tag-zro2-ceramic-foam-filter"],"yoast_head":"\nFoam Ceramic Filters Manufacturing Process - 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