{"id":4697,"date":"2020-09-11T14:15:27","date_gmt":"2020-09-11T14:15:27","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4697"},"modified":"2020-09-11T14:15:27","modified_gmt":"2020-09-11T14:15:27","slug":"aluminium-liquid-filtration","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/aluminium-liquid-filtration\/","title":{"rendered":"Filtragem de alum\u00ednio l\u00edquido"},"content":{"rendered":"

A filtragem do alum\u00ednio l\u00edquido \u00e9 o m\u00e9todo mais eficaz e confi\u00e1vel para remover inclus\u00f5es n\u00e3o met\u00e1licas do alum\u00ednio fundido. Existem diversos tipos de filtragem. O mais simples \u00e9 a filtragem com tecido de fibra de vidro. Os melhores resultados na filtragem do alum\u00ednio l\u00edquido s\u00e3o obtidos com tubos filtrantes e placas filtrantes de espuma cer\u00e2mica.<\/p>\n

A principal vantagem do filtro de espuma cer\u00e2mica<\/a> O sistema permite que as inclus\u00f5es de esc\u00f3ria geradas no processo de inje\u00e7\u00e3o fora do forno sejam efetivamente eliminadas por meio da placa filtrante, removendo assim as pequenas inclus\u00f5es do tamanho de m\u00edcrons presentes no alum\u00ednio l\u00edquido \u2014 algo que n\u00e3o \u00e9 poss\u00edvel com o processo convencional. Ao mesmo tempo, devido \u00e0s pequenas inclus\u00f5es filtradas pela placa filtrante, o n\u00famero efetivo de n\u00facleos cristalinos no alum\u00ednio l\u00edquido \u00e9 reduzido, de modo que o alum\u00ednio l\u00edquido nucleia e cresce sob uma condi\u00e7\u00e3o de sub-resfriamento significativo, e o tempo de solidifica\u00e7\u00e3o \u00e9 reduzido, refinando a estrutura. Reduzir o teor de hidrog\u00eanio no alum\u00ednio l\u00edquido. Os \u00e1tomos de hidrog\u00eanio podem ser adsorvidos em algumas inclus\u00f5es de oxida\u00e7\u00e3o, e essas inclus\u00f5es podem se tornar o n\u00facleo do crescimento de bolhas; assim, o g\u00e1s presente nas inclus\u00f5es pode ser removido ao mesmo tempo; os elementos nocivos (s\u00f3dio e pot\u00e1ssio) no alum\u00ednio l\u00edquido podem ser removidos por adsor\u00e7\u00e3o. Portanto, de acordo com as diferentes exig\u00eancias dos clientes ou com as condi\u00e7\u00f5es ambientais do local, a sele\u00e7\u00e3o da placa filtrante adequada para garantir a qualidade do produto permite controlar efetivamente as inclus\u00f5es de esc\u00f3ria.<\/p>\n

\"Filtragem<\/p>\n

Os requisitos b\u00e1sicos para o filtro cer\u00e2mico de espuma s\u00e3o:<\/p>\n

    \n
  1. Possui resist\u00eancia suficiente tanto \u00e0 temperatura ambiente quanto a altas temperaturas para evitar danos e a queda de esc\u00f3ria durante o transporte, a instala\u00e7\u00e3o e o uso.<\/li>\n
  2. Possui alta estabilidade qu\u00edmica, n\u00e3o reage com o alum\u00ednio fundido na faixa de temperatura de trabalho e n\u00e3o causa danos ao alum\u00ednio l\u00edquido nem ao meio ambiente.<\/li>\n
  3. Possui taxa de passagem e permeabilidade ao alum\u00ednio l\u00edquido suficientes para garantir uma filtragem suave durante a produ\u00e7\u00e3o.<\/li>\n
  4. Portanto, a placa do filtro deve ter um baixo coeficiente de expans\u00e3o t\u00e9rmica e n\u00e3o apresentar rachaduras quando aquecida.<\/li>\n
  5. N\u00e3o \u00e9 higrosc\u00f3pico, possui baixa densidade e baixa capacidade t\u00e9rmica espec\u00edfica, e n\u00e3o precisa ser pr\u00e9-aquecido antes do uso.<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"

    Aluminium Liquid Filtration is the most effective and reliable method to remove non-metallic inclusions in aluminum melt. There are many kinds of filtration. The simplest…<\/p>","protected":false},"author":1,"featured_media":4698,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[],"class_list":["post-4697","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"yoast_head":"\nAluminium Liquid Filtration by Ceramic Foam Filter System<\/title>\n<meta name=\"description\" content=\"Aluminium Liquid Filtration by ceramic foam filter is the most effective method to remove non-metallic inclusions in aluminum melt.\" \/>\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\/aluminium-liquid-filtration\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Aluminium Liquid Filtration 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