{"id":8299,"date":"2021-03-31T06:31:02","date_gmt":"2021-03-31T06:31:02","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8299"},"modified":"2021-03-31T06:31:02","modified_gmt":"2021-03-31T06:31:02","slug":"ceramic-filters-for-metal-casting","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/ceramic-filters-for-metal-casting\/","title":{"rendered":"Filtros cer\u00e2micos para fundi\u00e7\u00e3o de metais"},"content":{"rendered":"

Os filtros cer\u00e2micos para fundi\u00e7\u00e3o de metais podem remover com efic\u00e1cia as impurezas de grande porte do alum\u00ednio fundido e absorver as part\u00edculas finas de impurezas na faixa de m\u00edcrons, melhorando assim a qualidade da superf\u00edcie, o desempenho do produto e a microestrutura, al\u00e9m de aumentar a produ\u00e7\u00e3o. Os filtros cer\u00e2micos para fundi\u00e7\u00e3o de metais s\u00e3o amplamente utilizados na produ\u00e7\u00e3o de perfis de alum\u00ednio, folha de alum\u00ednio e ligas de alum\u00ednio.<\/p>\n

Processo de fabrica\u00e7\u00e3o de filtros de espuma cer\u00e2mica<\/strong><\/p>\n

Os filtros de espuma cer\u00e2mica para fundi\u00e7\u00e3o de metais adotam uma estrutura de rede tridimensional e utilizam a esponja de espuma org\u00e2nica, interligada por poros, como suporte para imergi-la em uma pasta cer\u00e2mica especial com tixotropia; al\u00e9m disso, empregam um processo especial de extrus\u00e3o por rolos para distribuir uniformemente a pasta cer\u00e2mica sobre a superf\u00edcie. A estrutura principal do suporte. Em seguida, \u00e9 seco e curado, e depois queimado em alta temperatura.<\/p>\n

A porosidade \u00e9 a porcentagem do volume total das cavidades no filtro cer\u00e2mico de espuma<\/a> produto em rela\u00e7\u00e3o ao volume total do filtro. A porosidade determina a capacidade de filtragem do filtro de espuma cer\u00e2mica por unidade de volume. Quanto maior a porosidade, maior \u00e9 a vaz\u00e3o de filtragem do filtro e maior \u00e9 a capacidade de filtragem.<\/p>\n

\"\"<\/p>\n

Atualmente, existem dois m\u00e9todos principais para calcular o volume dos orif\u00edcios dos filtros cer\u00e2micos:<\/p>\n

Um m\u00e9todo consiste em calcular o volume dos orif\u00edcios do filtro de cer\u00e2mica espumosa de acordo com a lei de Arquimedes, ou seja, usar um tubo de transbordamento para despejar \u00e1gua em um copo de vidro at\u00e9 que a \u00e1gua comece a sair pelo tubo de transbordamento e, em seguida, testar a \u00e1gua. A \u00e1gua n\u00e3o sai mais. Coloque todas as amostras na \u00e1gua com cuidado; ent\u00e3o, a \u00e1gua escorrer\u00e1 pelo tubo de transbordamento, e me\u00e7a a quantidade de \u00e1gua na parte. Subtraia o volume transbordado do volume f\u00edsico da placa filtrante, que corresponde ao volume total dos po\u00e7os na placa filtrante.<\/p>\n

Outro m\u00e9todo consiste em determinar a densidade real e a densidade aparente da amostra a ser testada e, em seguida, calcular a porosidade da amostra de acordo com a f\u00f3rmula a seguir.<\/p>\n

Ambos os m\u00e9todos t\u00eam suas vantagens e desvantagens. O m\u00e9todo de opera\u00e7\u00e3o \u00e9 simples e pr\u00e1tico, e a velocidade de detec\u00e7\u00e3o \u00e9 alta, mas sua desvantagem fatal reside nas caracter\u00edsticas de absor\u00e7\u00e3o de \u00e1gua do pr\u00f3prio material da placa filtrante, de modo que a quantidade de \u00e1gua descarregada \u00e9 menor do que a quantidade real de \u00e1gua. Isso resulta em dados de medi\u00e7\u00e3o muito baixos.<\/p>\n

Embora o processo de ensaio do segundo m\u00e9todo seja mais complicado, a influ\u00eancia da taxa de absor\u00e7\u00e3o de \u00e1gua do material da placa filtrante \u00e9 exclu\u00edda durante o ensaio, e os dados obtidos s\u00e3o relativamente precisos.<\/p>\n

Nesta norma, determina-se que o \u00edndice de porosidade \u00e9 superior a 84%.<\/p>","protected":false},"excerpt":{"rendered":"

The ceramic filters for metal casting can effectively remove the large impurities in the molten aluminum and absorb the micron-level fine particles of impurities, thereby…<\/p>","protected":false},"author":1,"featured_media":8300,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[],"class_list":["post-8299","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ceramic-foam-filter"],"yoast_head":"\nCeramic Filters for Metal Casting -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"The ceramic foam filters for metal casting adopt a three-dimensional network structure, and use the organic foam sponge...\" \/>\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\/ceramic-filters-for-metal-casting\/\" 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