{"id":2584,"date":"2020-07-04T09:46:40","date_gmt":"2020-07-04T09:46:40","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=2584"},"modified":"2020-09-28T08:04:59","modified_gmt":"2020-09-28T08:04:59","slug":"molten-metal-filters-for-metallurgical-industry","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/molten-metal-filters-for-metallurgical-industry\/","title":{"rendered":"Filtros para metal fundido para a ind\u00fastria metal\u00fargica"},"content":{"rendered":"

A cer\u00e2mica espumosa \u00e9 um tipo de material poroso. Trata-se de um produto cer\u00e2mico poroso de terceira gera\u00e7\u00e3o, desenvolvido ap\u00f3s as cer\u00e2micas porosas comuns de primeira gera\u00e7\u00e3o e as cer\u00e2micas porosas em forma de favo de mel de segunda gera\u00e7\u00e3o. O tamanho de seus poros varia de nan\u00f4metros a micr\u00f4metros, e o material apresenta uma estrutura de rede tridimensional e caracter\u00edsticas de alta porosidade, podendo atingir at\u00e9 90%. Os filtros de metal fundido para a ind\u00fastria metal\u00fargica apresentam as vantagens de peso leve, alta porosidade, grande \u00e1rea superficial espec\u00edfica, resist\u00eancia ao choque t\u00e9rmico, resist\u00eancia \u00e0 corros\u00e3o, resist\u00eancia a altas temperaturas, longa vida \u00fatil e boa adsor\u00e7\u00e3o do filtro.<\/p>\n

O desenvolvimento da terceira gera\u00e7\u00e3o de materiais cer\u00e2micos espumados teve in\u00edcio na d\u00e9cada de 1970. Como um novo tipo de material filtrante inorg\u00e2nico n\u00e3o met\u00e1lico, ele utiliza principalmente p\u00f3 de min\u00e9rio bruto, caulim ou res\u00edduos da ind\u00fastria cer\u00e2mica, cinzas volantes, ganga de carv\u00e3o e rejeitos de m\u00e1rmore. , esc\u00f3ria e outros materiais inorg\u00e2nicos como mat\u00e9ria-prima, misturados com uma determinada propor\u00e7\u00e3o de agente espumante, co-solvente etc. para produzir uma pasta cer\u00e2mica \u00e0 base de \u00e1gua, imersa em pl\u00e1stico espumado para formar um revestimento de filme cer\u00e2mico e, em seguida, queimada. De acordo com o metal l\u00edquido a ser filtrado, os materiais mais comuns s\u00e3o carboneto de sil\u00edcio, alumina, zirc\u00f4nia, magn\u00e9sia, etc.<\/p>\n

Atualmente, as cer\u00e2micas espumosas t\u00eam sido amplamente utilizadas em diversos campos. Al\u00e9m da purifica\u00e7\u00e3o de metal fundido na ind\u00fastria metal\u00fargica, elas tamb\u00e9m s\u00e3o empregadas em materiais de isolamento t\u00e9rmico, suportes para catalisadores qu\u00edmicos e outros campos de aplica\u00e7\u00e3o.<\/p>\n

\"Filtros<\/p>\n

Filtros para metal fundido para a ind\u00fastria metal\u00fargica<\/h2>\n

O filtro cer\u00e2mico de espuma<\/a>\u00a0\u00c9 utilizado principalmente no processo de fundi\u00e7\u00e3o para purificar a liga l\u00edquida de fundi\u00e7\u00e3o e reduzir ou eliminar diversas inclus\u00f5es n\u00e3o met\u00e1licas e problemas de exaust\u00e3o durante a fundi\u00e7\u00e3o. Devido a defeitos em problemas de fundi\u00e7\u00e3o, como inclus\u00f5es n\u00e3o met\u00e1licas, a propor\u00e7\u00e3o de res\u00edduos de fundi\u00e7\u00e3o em rela\u00e7\u00e3o ao n\u00famero total de res\u00edduos chega a 50%-60%. Enquanto diversos custos aumentam, pode-se esperar que o escoamento do excesso de res\u00edduos prejudique o meio ambiente, e os defeitos de inclus\u00e3o n\u00e3o apenas prejudicam significativamente as propriedades mec\u00e2nicas e o desempenho da pe\u00e7a fundida, mas tamb\u00e9m t\u00eam um efeito prejudicial no usinagem e na apar\u00eancia da pe\u00e7a.<\/p>\n

Para resolver esse problema, inicialmente utilizava-se tela met\u00e1lica, placas de a\u00e7o perfuradas etc. para fabricar filtros simples inseridos no sistema de vazamento, com o objetivo de remover inclus\u00f5es; posteriormente, passou-se a utilizar estruturas bidimensionais, como fibras de silicato em forma de pino e fibras de nitreto de boro. Atualmente, os filtros de cer\u00e2mica espumosa utilizam o tamanho dos poros para interceptar mecanicamente grandes part\u00edculas de \u00f3xidos mistos e o bolo de filtra\u00e7\u00e3o para reter pequenas part\u00edculas desses \u00f3xidos. Al\u00e9m disso, gra\u00e7as \u00e0s capacidades de adsor\u00e7\u00e3o e retifica\u00e7\u00e3o, a linha de produ\u00e7\u00e3o de filtros de cer\u00e2mica espumosa melhorou significativamente o rendimento das pe\u00e7as fundidas. Por exemplo, ap\u00f3s a utiliza\u00e7\u00e3o do filtro de cer\u00e2mica em espuma na F\u00e1brica de Fundi\u00e7\u00e3o Dongfeng n\u00ba 2, a taxa de produ\u00e7\u00e3o aumentou de 65,31 TP3T para 71,51 TP3T, e houve uma economia de ferro fundido de 61 TP3T apenas no peso do canal de alimenta\u00e7\u00e3o. A dureza da pe\u00e7a fundida filtrada tamb\u00e9m melhorou significativamente, o que, por sua vez, prolonga a vida \u00fatil da ferramenta de corte.<\/p>\n

Os filtros cer\u00e2micos de espuma geralmente utilizam espuma de poliuretano como suporte, imersa em uma pasta cer\u00e2mica composta por agregados refrat\u00e1rios, agentes de sinteriza\u00e7\u00e3o, agentes ligantes e outros p\u00f3s finos, al\u00e9m de \u00e1gua; em seguida, o excesso de pasta \u00e9 espremido, deixando o revestimento. O material cer\u00e2mico ao redor das fibras da espuma \u00e9 ent\u00e3o seco, queimado e sinterizado em alta temperatura, resultando, por fim, no produto cer\u00e2mico com estrutura espumosa. Devido \u00e0s diferentes temperaturas de fundi\u00e7\u00e3o das ligas, filtros cer\u00e2micos de espuma com materiais refrat\u00e1rios devem ser selecionados para pe\u00e7as fundidas. Nas \u00faltimas d\u00e9cadas, filtros cer\u00e2micos de espuma de diversos materiais foram desenvolvidos com base no desempenho de ligas de diferentes materiais, tanto no pa\u00eds quanto no exterior.<\/p>","protected":false},"excerpt":{"rendered":"

Foam ceramic is a kind of porous material. It is a third-generation porous ceramic product developed after the first-generation common porous ceramics and the second-generation…<\/p>","protected":false},"author":1,"featured_media":5286,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[434,433,105,432,431,430,429,428,21,427,426,219,425,424,423,422,421,420,165,419,418,417,416,415,414,413,412,483,411,298,410,409,408,407,406,405],"class_list":["post-2584","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-30-ppi-foam","tag-alumina-ceramic-foam-filter","tag-ceramic-filter-for-foundry","tag-ceramic-filter-foundry","tag-ceramic-filter-manufacturer","tag-ceramic-filter-media","tag-ceramic-filtration","tag-ceramic-foam","tag-ceramic-foam-filter","tag-ceramic-foam-filter-manufacturers","tag-ceramic-foam-filter-manufacturing-process","tag-ceramic-foam-filter-suppliers","tag-ceramic-foam-filters-for-casting","tag-ceramic-honeycomb","tag-ceramic-honeycomb-filter","tag-filter-foam-manufacturers","tag-filter-manufacturers-in-india","tag-foam-filter","tag-foam-filter-manufacturers","tag-foam-filter-material","tag-foundry-ceramic-filters","tag-foundry-filters","tag-honeycomb-ceramic-filter","tag-honeycomb-filter","tag-honeycomb-filter-material","tag-metal-filter","tag-metal-foam-filter","tag-molten-metal-filter","tag-porous-alumina-plate","tag-porous-ceramic-filter","tag-porous-ceramic-materials","tag-porous-ceramic-plate","tag-ppi-foam","tag-refractory-materials","tag-silicon-carbide-ceramic-foam-filter","tag-silicon-carbide-foam-filter"],"yoast_head":"\nMolten Metal Filters used for Metallurgical Industry<\/title>\n<meta name=\"description\" content=\"Molten Metal Filters have the advantages of light weight, high porosity, large specific surface area, thermal shock resistance.\" \/>\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\/molten-metal-filters-for-metallurgical-industry\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Molten Metal Filters used for Metallurgical Industry\" \/>\n<meta property=\"og:description\" content=\"Molten Metal Filters have the advantages of light weight, high porosity, large specific surface area, thermal shock resistance.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.alalloycasting.com\/pt\/molten-metal-filters-for-metallurgical-industry\/\" \/>\n<meta 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