{"id":12478,"date":"2022-01-24T07:30:26","date_gmt":"2022-01-24T07:30:26","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=12478"},"modified":"2022-01-24T07:30:26","modified_gmt":"2022-01-24T07:30:26","slug":"%d1%84%d0%b8%d0%bb%d1%8c%d1%82%d1%80-%d1%80%d0%b0%d1%81%d0%bf%d0%bb%d0%b0%d0%b2%d0%bb%d0%b5%d0%bd%d0%bd%d0%be%d0%b3%d0%be-%d0%b0%d0%bb%d1%8e%d0%bc%d0%b8%d0%bd%d0%b8%d1%8f","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/%d1%84%d0%b8%d0%bb%d1%8c%d1%82%d1%80-%d1%80%d0%b0%d1%81%d0%bf%d0%bb%d0%b0%d0%b2%d0%bb%d0%b5%d0%bd%d0%bd%d0%be%d0%b3%d0%be-%d0%b0%d0%bb%d1%8e%d0%bc%d0%b8%d0%bd%d0%b8%d1%8f\/","title":{"rendered":"Filtro de alum\u00ednio fundido"},"content":{"rendered":"

Filtro para alum\u00ednio fundido: O filtro de cer\u00e2mica espumosa \u00e9 o meio mais eficaz e confi\u00e1vel para a remo\u00e7\u00e3o de inclus\u00f5es n\u00e3o met\u00e1licas da massa fundida de alum\u00ednio e o m\u00e9todo de filtragem mais eficaz.<\/p>\n

Os filtros de cer\u00e2mica espumosa possuem uma malha multicamadas, orif\u00edcios multidimensionais que atravessam o material e poros interconectados.<\/p>\n

Durante a filtragem, o alum\u00ednio fundido transporta as impurezas por canais sinuosos e poros, entra em contato com a estrutura de espuma da placa filtrante, sendo diretamente retido, adsorvido e depositado. Quando o metal fundido flui pela abertura, o canal da placa filtrante se curva; o metal fundido que flui pelo canal muda a dire\u00e7\u00e3o do fluxo, e as impurezas colidem com a parede da abertura e aderem firmemente a ela.<\/p>\n

O filtro profundo \u00e9 de grandes dimens\u00f5es; a instala\u00e7\u00e3o e a substitui\u00e7\u00e3o do material filtrante exigem tempo e esfor\u00e7o, e ele \u00e9 adequado apenas para a produ\u00e7\u00e3o de grandes quantidades de ligas espec\u00edficas. Nesse dispositivo, o alum\u00ednio l\u00edquido flui para baixo, e no centro da parte inferior do dispositivo foi adicionado um bocal de ventila\u00e7\u00e3o para a inje\u00e7\u00e3o de g\u00e1s inerte. A bomba de eleva\u00e7\u00e3o a g\u00e1s consiste em um tubo de alum\u00ednio para elevar o l\u00edquido acima do bocal de ventila\u00e7\u00e3o, e o n\u00edvel do metal na sa\u00edda pode ser ajustado. O objetivo \u00e9 aumentar a efici\u00eancia da filtragem e, ao mesmo tempo, utilizar as esferas filtrantes de maneira mais eficaz; este dispositivo \u00e9 pequeno e compacto, sendo f\u00e1cil de encher, esvaziar e transportar.<\/p>\n

O filtro tubular de corindo apresenta alta efici\u00eancia de filtragem, mas \u00e9 mais caro e pouco pr\u00e1tico de usar, al\u00e9m de ser mais utilizado no Jap\u00e3o. A empresa Southwest Aluminium desenvolveu filtros tubulares de corindo na d\u00e9cada de 1980, mas, devido \u00e0 qualidade inst\u00e1vel da montagem e a outros motivos, o efeito de filtragem era inst\u00e1vel, e, na d\u00e9cada de 1990, deixou de ser utilizado. Nos \u00faltimos anos, a tecnologia passou por um maior desenvolvimento.<\/p>\n

\"Filtro<\/p>\n

Pelo contr\u00e1rio, filtro de cer\u00e2mica espumosa<\/a> Feito de alum\u00ednio fundido, \u00e9 amplamente utilizado em todo o mundo gra\u00e7as \u00e0 sua facilidade de uso, ao bom efeito de filtragem e ao baixo pre\u00e7o.<\/p>\n

Mais de 50% de ligas de alum\u00ednio fundidas nos pa\u00edses desenvolvidos s\u00e3o filtradas por placas filtrantes de cer\u00e2mica espumosa.<\/p>\n

A tecnologia dos filtros de cer\u00e2mica espumosa de alum\u00ednio fundido est\u00e1 se desenvolvendo rapidamente. Para atender aos requisitos de produtos de alta qualidade no que diz respeito \u00e0 qualidade da fus\u00e3o, o tamanho dos poros da placa filtrante est\u00e1 se tornando mais fino.<\/p>\n

O filtro de alum\u00ednio fundido e espuma cer\u00e2mica foi desenvolvido com densidades de 10, 20, 30, 40, 50 ppi at\u00e9 60 e 70 ppi, e h\u00e1 muitas novas op\u00e7\u00f5es dispon\u00edveis.<\/p>\n

Para produtos com requisitos de qualidade mais elevados nos pa\u00edses desenvolvidos, costuma-se utilizar um filtro cer\u00e2mico de duas etapas na produ\u00e7\u00e3o de fundi\u00e7\u00e3o. O tamanho dos poros da placa filtrante do primeiro est\u00e1gio \u00e9 maior, enquanto o da placa filtrante do \u00faltimo est\u00e1gio \u00e9 menor; por exemplo, configura\u00e7\u00f5es como 30\/50, 30\/60 ppi ou mesmo 40\/70 etc. A empresa de alum\u00ednio dodo Sudoeste da China tamb\u00e9m utiliza placas filtrantes de cer\u00e2mica espumosa de duas etapas com 30\/50 ppi para a filtragem de alum\u00ednio fundido com duplo zero, bases de poliestireno, materiais para a fabrica\u00e7\u00e3o de latas etc.<\/p>","protected":false},"excerpt":{"rendered":"

\u0424\u0438\u043b\u044c\u0442\u0440 \u0434\u043b\u044f \u0440\u0430\u0441\u043f\u043b\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0430\u043b\u044e\u043c\u0438\u043d\u0438\u044f \u041f\u0435\u043d\u043e\u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u0438\u0439 \u0444\u0438\u043b\u044c\u0442\u0440 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u044b\u043c \u0438 \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u043c \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u043e\u043c \u0434\u043b\u044f \u0443\u0434\u0430\u043b\u0435\u043d\u0438\u044f \u043d\u0435\u043c\u0435\u0442\u0430\u043b\u043b\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0432\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u0439 \u0438\u0437 \u0430\u043b\u044e\u043c\u0438\u043d\u0438\u0435\u0432\u043e\u0433\u043e \u0440\u0430\u0441\u043f\u043b\u0430\u0432\u0430 \u0438 \u043d\u0430\u0438\u0431\u043e\u043b\u0435\u0435 \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u044b\u043c \u043c\u0435\u0442\u043e\u0434\u043e\u043c \u0444\u0438\u043b\u044c\u0442\u0440\u0430\u0446\u0438\u0438. \u041f\u0435\u043d\u043e\u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u0438\u0435…<\/p>","protected":false},"author":1,"featured_media":12479,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[13227,13226],"class_list":["post-12478","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ceramic-foam-filter","tag-13227","tag-13226"],"yoast_head":"\n\u0424\u0438\u043b\u044c\u0442\u0440 \u0440\u0430\u0441\u043f\u043b\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0430\u043b\u044e\u043c\u0438\u043d\u0438\u044f, \u041f\u0435\u043d\u043e\u043a\u0435\u0440\u0430\u043c\u0438\u0447\u0435\u0441\u043a\u0438\u0435 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