{"id":8331,"date":"2021-04-06T08:50:41","date_gmt":"2021-04-06T08:50:41","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8331"},"modified":"2021-04-06T08:50:41","modified_gmt":"2021-04-06T08:50:41","slug":"foam-ceramic-filter-medium","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/foam-ceramic-filter-medium\/","title":{"rendered":"M\u00e9dia filtrant en mousse c\u00e9ramique"},"content":{"rendered":"<p>\u00c0 la fin des ann\u00e9es 1970, les \u00c9tats-Unis ont mis au point un filtre en mousse c\u00e9ramique (CFF) compos\u00e9 d\u2019alumine et d\u2019oxyde de chrome. Non seulement il offre une bonne efficacit\u00e9 de purification, mais il est \u00e9galement pratique \u00e0 utiliser. Lorsque l\u2019aluminium fondu le traverse, il ne n\u00e9cessite qu\u2019une diff\u00e9rence de pression de 100 \u00e0 150 mm. Une fois le passage effectu\u00e9, il suffit de maintenir une diff\u00e9rence de pression de 2 \u00e0 10 mm. Son principe de purification est identique \u00e0 celui de la filtration par tubes c\u00e9ramiques, et sa porosit\u00e9 atteint 80%-90%. Par cons\u00e9quent, le m\u00e9dia filtrant en c\u00e9ramique alv\u00e9olaire pr\u00e9sente une grande capacit\u00e9 de d\u00e9bit et convient \u00e0 la purification par filtration dans la production de lingots par coul\u00e9e semi-continue et de lamin\u00e9s par coul\u00e9e continue.<\/p>\n<p>Un filtre en c\u00e9ramique alv\u00e9olaire est un dispositif de filtration utilisant de la c\u00e9ramique alv\u00e9olaire comme mat\u00e9riau filtrant. Il est install\u00e9 dans le caisson de filtration du syst\u00e8me d'injection de m\u00e9tal en fusion, entre le four statique et la table de coul\u00e9e, afin d'assurer la filtration.<\/p>\n<p>Le choix d'un filtre en mousse c\u00e9ramique d\u00e9pend du degr\u00e9 de pr\u00e9cision de la filtration. En g\u00e9n\u00e9ral, <a href=\"http:\/\/www.alalloycasting.com\/fr\/30ppi-cff-filter\/\">Filtre CFF 30 PPI<\/a> peut r\u00e9pondre aux exigences de purification de l'aluminium liquide. Si l'aluminium liquide est encrass\u00e9, un filtre de 20 PPI peut \u00eatre utilis\u00e9 pour la pr\u00e9filtration afin d'\u00e9viter un colmatage pr\u00e9matur\u00e9 du filtre \u00e0 pores. Ce type de filtre de grand diam\u00e8tre est \u00e9galement couramment utilis\u00e9 dans le canal de coul\u00e9e reliant le four au four de repos, et la taille du filtre est d\u00e9termin\u00e9e en fonction de la vitesse de coul\u00e9e et du d\u00e9bit de m\u00e9tal par unit\u00e9 de temps.<\/p>\n<p>En r\u00e8gle g\u00e9n\u00e9rale, le filtre en c\u00e9ramique alv\u00e9ol\u00e9e est dispos\u00e9 horizontalement dans le caisson de filtration, ce qui permet \u00e0 l'eau charg\u00e9e d'aluminium de s'\u00e9couler verticalement. Lorsque l'eau charg\u00e9e d'aluminium s'\u00e9l\u00e8ve de mani\u00e8re homog\u00e8ne, le risque de formation de canaux est r\u00e9duit. De plus, lors de l'installation de la c\u00e9ramique alv\u00e9ol\u00e9e, les joints doivent \u00eatre colmat\u00e9s \u00e0 l'aide de fibres ignifuges afin d'\u00e9liminer tout risque de d\u00e9rivation.<\/p>\n<p>Il est pr\u00e9f\u00e9rable de chauffer la c\u00e9ramique alv\u00e9ol\u00e9e \u00e0 l'aide d'un radiateur rayonnant jusqu'\u00e0 la temp\u00e9rature de fusion avant de proc\u00e9der au filtrage, afin de garantir que l'aluminium en fusion s'\u00e9coule vers la c\u00e9ramique alv\u00e9ol\u00e9e sans que le m\u00e9tal ne se solidifie et n'obstrue l'orifice.<\/p>","protected":false},"excerpt":{"rendered":"<p>In the late 1970s, the United States developed a Ceramic Foam Filter (CFF) made of alumina and chromium oxide. It not only has a good&hellip;<\/p>","protected":false},"author":1,"featured_media":8334,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8331","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Foam Ceramic Filter Medium -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Foam ceramic filter medium has a large flow capacity and is suitable for filtration purification in aluminum alloy casting production.\" \/>\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\/fr\/foam-ceramic-filter-medium\/\" \/>\n<meta property=\"og:locale\" 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