{"id":5980,"date":"2019-10-22T03:19:59","date_gmt":"2019-10-22T03:19:59","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=5980"},"modified":"2019-10-22T03:30:15","modified_gmt":"2019-10-22T03:30:15","slug":"professional-foundry-foam-filter","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/es\/professional-foundry-foam-filter\/","title":{"rendered":"Filtro de espuma profesional para fundici\u00f3n"},"content":{"rendered":"

Filtro de espuma profesional para fundici\u00f3n<\/p>\n

El filtro de espuma profesional para fundici\u00f3n se obtiene a partir de diferentes tipos de cer\u00e1micas: corind\u00f3n, aluminosilicato, mullita y carburo.
\nPor lo tanto, los filtros de carburo de silicio con aglutinante de silicato se utilizan para filtrar el hierro fundido.
\nEstos filtros presentan una gran resistencia debido a que, durante la cocci\u00f3n, los granos de SiC de la masa cer\u00e1mica se oxidan parcialmente para formar vidrio de s\u00edlice, lo que proporciona una buena uni\u00f3n del carburo de silicio con la matriz de aglutinante de silicato, creando una espuma resistente. Sin embargo, al fundir hierro fundido, se forma escoria l\u00edquida con un alto contenido en FeO, que no humedece los filtros de carburo de silicio debido a la reacci\u00f3n carbot\u00e9rmica entre el componente de carbono de los granos de SiC y las impurezas de grafito, lo que provoca que la escoria se adhiera al filtro.<\/p>\n

Es evidente que la elecci\u00f3n del r\u00e9gimen de cocci\u00f3n \u00f3ptimo es fundamental en la fabricaci\u00f3n de materiales cer\u00e1micos, ya que es en esta fase cuando aumenta la resistencia del producto acabado.
\nEntre los fen\u00f3menos que se producen durante la cocci\u00f3n, el m\u00e1s importante es el proceso de sinterizaci\u00f3n, que provoca la transformaci\u00f3n de las preformas porosas \u2014un conglomerado de part\u00edculas d\u00e9bilmente unidas, unidas principalmente por las fuerzas de fricci\u00f3n y adhesi\u00f3n\u2014 en un cuerpo s\u00f3lido con una estructura y unas propiedades determinadas.
\nDurante la sinterizaci\u00f3n, tienen lugar la formaci\u00f3n y el crecimiento de contactos entre las part\u00edculas de la fase s\u00f3lida, una disminuci\u00f3n del tama\u00f1o y del n\u00famero de poros, hasta su desaparici\u00f3n total, y un desplazamiento por recristalizaci\u00f3n de los l\u00edmites entre los cristales.
\nAl mismo tiempo, en el proceso de fabricaci\u00f3n de productos cer\u00e1micos de c\u00e9lula abierta y alta porosidad, es muy importante conseguir, por un lado, que el material acabado conserve la estructura porosa de las estructuras originales de PPU y, por otro, que adquiera resistencia gracias a la sinterizaci\u00f3n de las part\u00edculas situadas en las particiones intercelulares.<\/p>\n

\"Filtro<\/p>\n

Proveedores de filtros cer\u00e1micos<\/a> Si se encuentra en China, p\u00f3ngase en contacto con sales@adtechamm.com<\/h3>\n

La forma m\u00e1s habitual de obtener un filtro de espuma profesional para fundici\u00f3n consiste en la t\u00e9cnica de eliminaci\u00f3n de la r\u00e9plica de espuma: se impregna espuma de poliuretano altamente porosa con una pasta cer\u00e1mica, tras lo cual se seca y se cuece.
\nDurante la cocci\u00f3n, la espuma de poliuretano que se encuentra en el interior del recubrimiento cer\u00e1mico se evapora y queda una estructura cer\u00e1mica con un gran n\u00famero de poros.
\nLa preparaci\u00f3n de cer\u00e1micas de espuma de \u00f3xido se basa en la impregnaci\u00f3n de estructuras de espuma de poliuretano (PUF) altamente porosas con suspensiones de barbotina a base de polvo de al\u00famina con aditivos de sinterizaci\u00f3n, seguida de la cocci\u00f3n de las estructuras impregnadas a temperaturas de entre 1700 y 1850 \u00b0\u0421 aproximadamente.
\nLos principales requisitos que deben cumplir los filtros cer\u00e1micos, adem\u00e1s de una elevada resistencia al calor y a los productos qu\u00edmicos presentes en los metales fundidos, son una porosidad abierta de entre el 80 y el 90%, con predominio de poros celulares interconectados, y una resistencia a la compresi\u00f3n de al menos 0,5 MPa.<\/p>\n

Los filtros basados en cer\u00e1micas de \u00f3xido permiten eliminar eficazmente las impurezas no deseadas, especialmente las inclusiones de composici\u00f3n similar, como las pel\u00edculas de \u00f3xido y las escorias.
\nGracias a su gran estabilidad, incluso tras una exposici\u00f3n prolongada a altas temperaturas, los filtros de cer\u00e1mica de \u00f3xido pueden utilizarse con \u00e9xito en cajas de filtraci\u00f3n o en hornos de calentamiento para filtrar grandes vol\u00famenes de metal l\u00edquido.
\nLas espumas celulares cer\u00e1micas a base de al\u00famina, que combinan una elevada resistencia al calor y a los metales fundidos y las escorias, as\u00ed como un bajo coste de las materias primas, se utilizan como soportes de catalizadores y filtros cer\u00e1micos para metales fundidos.<\/p>","protected":false},"excerpt":{"rendered":"

Professional Foundry Foam Filter Professional Foundry Foam Filter is obtained from different types of ceramics – corundum, aluminosilicate, mullite, carbide. So, silicate-bonded silicon carbide filters are used to filter cast iron. Such filters have high strength due to the fact that during firing, SiC grains…<\/p>","protected":false},"author":1,"featured_media":5981,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[26524],"tags":[],"yoast_head":"\nProfessional Foundry Foam Filter | Adtech China Aluminium Casting<\/title>\n<meta name=\"description\" content=\"It is obvious that the selection of the optimal firing regime is essential in the production of ceramic materials, since it is at this stage that....\" \/>\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.adtechamm.com\/es\/professional-foundry-foam-filter\/\" \/>\n<meta property=\"og:locale\" content=\"es_ES\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Professional Foundry Foam Filter | Adtech China Aluminium Casting\" 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