{"id":11450,"date":"2021-11-25T09:11:36","date_gmt":"2021-11-25T09:11:36","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11450"},"modified":"2022-08-26T03:18:07","modified_gmt":"2022-08-26T03:18:07","slug":"ceramic-foam-filter-porosity","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/pt\/ceramic-foam-filter-porosity\/","title":{"rendered":"Porosidade do filtro de espuma cer\u00e2mica"},"content":{"rendered":"

A porosidade \u00e9 a porcentagem do volume total das cavidades na placa filtrante de espuma cer\u00e2mica em rela\u00e7\u00e3o ao volume total da placa filtrante. A porosidade determina a capacidade de filtra\u00e7\u00e3o da placa filtrante de espuma cer\u00e2mica por unidade de volume. Quanto maior a porosidade, maior a taxa de filtra\u00e7\u00e3o da placa filtrante e maior a capacidade de filtra\u00e7\u00e3o, e vice-versa.<\/p>\n

Determina\u00e7\u00e3o da porosidade processo de fabrica\u00e7\u00e3o de filtros de espuma cer\u00e2mica<\/a>. Atualmente, existem dois m\u00e9todos principais para determinar a porosidade.<\/p>\n

Uma delas consiste em calcular o volume do orif\u00edcio na placa filtrante de acordo com a lei de Arquimedes, ou seja, injetar \u00e1gua no copo de vidro com o tubo de transbordamento at\u00e9 que a \u00e1gua comece a jorrar pelo tubo de transbordamento; a amostra ser\u00e1 analisada quando a \u00e1gua n\u00e3o estiver mais jorrando. Todas as amostras s\u00e3o colocadas cuidadosamente na \u00e1gua; em seguida, a \u00e1gua escorre pelo tubo de transbordamento e o volume de \u00e1gua nessa parte \u00e9 medido. O volume da \u00e1gua transbordada \u00e9 subtra\u00eddo do volume f\u00edsico da placa filtrante, que corresponde ao volume total dos orif\u00edcios da placa filtrante.<\/p>\n

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

Esses dois m\u00e9todos t\u00eam suas pr\u00f3prias 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 falha grave decorre das caracter\u00edsticas de absor\u00e7\u00e3o de \u00e1gua do pr\u00f3prio material da placa filtrante, o que faz com que o volume de \u00e1gua descarregado seja menor do que o volume real. Isso faz com que os dados medidos sejam muito baixos.<\/p>\n

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

\"Filtro<\/p>\n

Nesta norma, determina-se que o \u00edndice de porosidade seja superior a 84%. A uniformidade dos poros \u00e9 utilizada para descrever a diferen\u00e7a entre o n\u00famero real de orif\u00edcios por 25,4 mm de comprimento no produto da placa filtrante e o n\u00famero de orif\u00edcios teoricamente necess\u00e1rio.<\/p>\n

Quanto menor for o espa\u00e7o, melhor ser\u00e1 a qualidade do produto; se o espa\u00e7o for muito grande, isso prejudicar\u00e1 a capacidade do produto com placa filtrante de reduzir a reten\u00e7\u00e3o de impurezas ou causar\u00e1 uma baixa taxa de filtra\u00e7\u00e3o do ferro fundido, o que n\u00e3o atender\u00e1 aos requisitos de produ\u00e7\u00e3o espec\u00edficos do usu\u00e1rio.<\/p>\n

A uniformidade do tamanho dos poros depende principalmente da espuma utilizada na produ\u00e7\u00e3o do placa filtrante de espuma cer\u00e2mica<\/a>. A uniformidade dos poros da espuma \u00e9 boa e a uniformidade dos poros da placa filtrante tamb\u00e9m \u00e9 boa; portanto, a escolha da espuma \u00e9 extremamente importante.<\/p>","protected":false},"excerpt":{"rendered":"

Porosity is the percentage of the total volume of cavities in the ceramic foam filter plate product relative to the total volume of the filter…<\/p>","protected":false},"author":1,"featured_media":11451,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12971,12970],"class_list":["post-11450","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-ceramic-filter-manufacturing","tag-ceramic-foam-filter-porosity"],"yoast_head":"\nCeramic Foam Filter Porosity, Ceramic Filter Manufacturing<\/title>\n<meta name=\"description\" content=\"Porosity determines the filtration capacity of the ceramic foam filter plate per unit volume. 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