{"id":9123,"date":"2021-06-08T07:32:31","date_gmt":"2021-06-08T07:32:31","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9123"},"modified":"2021-06-08T07:32:31","modified_gmt":"2021-06-08T07:32:31","slug":"ceramic-filters-for-foundries","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/ceramic-filters-for-foundries\/","title":{"rendered":"Filtres en c\u00e9ramique pour fonderies"},"content":{"rendered":"

Les filtres en mousse c\u00e9ramique destin\u00e9s aux fonderies se sont r\u00e9v\u00e9l\u00e9s particuli\u00e8rement efficaces pour filtrer les m\u00e9taux en fusion, notamment l'aluminium en fusion. La r\u00e9sistance \u00e0 haute temp\u00e9rature de ces filtres est particuli\u00e8rement utile dans les conditions d'utilisation extr\u00eames rencontr\u00e9es lors de la filtration des m\u00e9taux en fusion. De plus, il a \u00e9t\u00e9 d\u00e9montr\u00e9 que la composition du filtre c\u00e9ramique ne contamine pas le m\u00e9tal.<\/p>\n

Les filtres en c\u00e9ramique destin\u00e9s aux fonderies constituent un mat\u00e9riau peu co\u00fbteux qui peut \u00eatre utilis\u00e9 de mani\u00e8re pratique en tant que produit jetable. Le m\u00e9tal en fusion est vers\u00e9 \u00e0 travers la mousse c\u00e9ramique \u00e0 un d\u00e9bit compris entre 5 et 500, et de pr\u00e9f\u00e9rence entre 30 et 100 pouces cubes par pouce carr\u00e9 de surface filtrante par minute, ce qui permet d'\u00e9liminer les solides entra\u00een\u00e9s du m\u00e9tal en fusion.<\/p>\n

Filtre en mousse c\u00e9ramique<\/a> Il s'agit d'un mat\u00e9riau en mousse organique souple \u00e0 cellules ouvertes, comportant une pluralit\u00e9 de vides interconnect\u00e9s entour\u00e9s d'une nappe de mat\u00e9riau en mousse. La suspension aqueuse d\u00e9crite ci-dessus est pr\u00e9par\u00e9e et le mat\u00e9riau en mousse est impr\u00e9gn\u00e9 de celle-ci de mani\u00e8re \u00e0 ce que la nappe en soit recouverte et que les vides en soient sensiblement remplis. Le mat\u00e9riau impr\u00e9gn\u00e9 est ensuite comprim\u00e9 afin d\u2019expulser entre 20 et 75% de la suspension tout en laissant la trame enrob\u00e9e de celle-ci. La compression est rel\u00e2ch\u00e9e de mani\u00e8re \u00e0 ce que la trame reste enrob\u00e9e de la suspension, puis le mat\u00e9riau est s\u00e9ch\u00e9. Le mat\u00e9riau s\u00e9ch\u00e9 est ensuite chauff\u00e9 afin de br\u00fbler d\u2019abord la mousse organique souple, puis de fritter le rev\u00eatement c\u00e9ramique, ce qui permet d\u2019obtenir une mousse c\u00e9ramique fusionn\u00e9e comportant une pluralit\u00e9 de vides interconnect\u00e9s entour\u00e9s d\u2019une trame de c\u00e9ramique li\u00e9e ou fusionn\u00e9e, conservant la configuration de la mousse souple.<\/p>\n

Le composant principal de la mousse c\u00e9ramique est l'Al\u2082O\u2083. L'Al\u2082O\u2083 est particuli\u00e8rement adapt\u00e9 \u00e0 une utilisation comme filtre c\u00e9ramique, car il n'est pas attaqu\u00e9 par l'aluminium fondu ni par le cuivre fondu, contrairement \u00e0 la silice, qui est quant \u00e0 elle attaqu\u00e9e par ces mat\u00e9riaux. De plus, l'alumine pr\u00e9sente une r\u00e9sistance suffisante pour r\u00e9sister aux attaques chimiques, ainsi qu'une r\u00e9sistance structurelle et m\u00e9canique lui permettant de supporter des conditions de temp\u00e9rature particuli\u00e8rement \u00e9lev\u00e9es.<\/p>","protected":false},"excerpt":{"rendered":"

The ceramic foam filters for foundries have been found to be particularly useful in filtering molten metal, especially molten aluminum. The high-temperature resistant characteristics of…<\/p>","protected":false},"author":1,"featured_media":9125,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9123","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nCeramic Filters for Foundries -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"The ceramic foam filters for foundries have been found to be particularly useful in filtering molten metal, especially molten aluminum.\" \/>\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\/ceramic-filters-for-foundries\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta 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