{"id":8962,"date":"2021-05-27T08:36:28","date_gmt":"2021-05-27T08:36:28","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8962"},"modified":"2021-05-27T08:36:28","modified_gmt":"2021-05-27T08:36:28","slug":"filters-for-molten-metal-foundry","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/filters-for-molten-metal-foundry\/","title":{"rendered":"Filtres pour la fonderie de m\u00e9taux en fusion"},"content":{"rendered":"

Les filtres en mousse c\u00e9ramique destin\u00e9s aux fonderies de m\u00e9taux en fusion sont utilis\u00e9s pour s\u00e9parer les impuret\u00e9s solides finement divis\u00e9es en suspension dans la masse fondue. Il a \u00e9galement \u00e9t\u00e9 sugg\u00e9r\u00e9 que les filtres en mousse c\u00e9ramique puissent servir de milieu filtrant, car ils pr\u00e9sentent un r\u00e9seau de canaux sinueux tr\u00e8s fins capables de pi\u00e9ger et de retenir les petites particules en suspension.<\/p>\n

L'\u00e9limination des scories \u00e0 l'ext\u00e9rieur du four s'effectue principalement \u00e0 l'aide de filtres en mousse c\u00e9ramique destin\u00e9s \u00e0 la fonderie de m\u00e9tal en fusion. Ces filtres sont constitu\u00e9s d'un r\u00e9seau multicouche et comportent des trous traversants multidimensionnels, tous reli\u00e9s entre eux. Lors de la filtration, l'aluminium en fusion, charg\u00e9 d'inclusions, s'\u00e9coule le long de canaux sinueux et de pores. Lorsqu\u2019il entre en contact avec la structure alv\u00e9olaire de la plaque filtrante, il est directement bloqu\u00e9, adsorb\u00e9, d\u00e9pos\u00e9, etc. Lorsque le m\u00e9tal en fusion s\u2019\u00e9coule dans les pores, le canal de la plaque filtrante pr\u00e9sente une courbure ; le m\u00e9tal en fusion qui traverse ce canal change de direction d\u2019\u00e9coulement, et les inclusions entrent en collision avec la paroi du trou, o\u00f9 elles adh\u00e8rent fermement.<\/p>\n

Le principal avantage du syst\u00e8me de filtration \u00e0 mousse c\u00e9ramique<\/a> est que les inclusions de scories g\u00e9n\u00e9r\u00e9es lors du processus de transfert \u00e0 l'ext\u00e9rieur du four sont efficacement \u00e9limin\u00e9es gr\u00e2ce \u00e0 la plaque filtrante, y compris les inclusions de taille microm\u00e9trique pr\u00e9sentes dans l'aluminium en fusion, ce que la technologie conventionnelle ne permet pas. Par ailleurs, comme la plaque filtrante retient les inclusions fines et r\u00e9duit le nombre effectif de noyaux cristallins dans l\u2019aluminium fondu, la nucl\u00e9ation et la croissance cristalline s\u2019op\u00e8rent dans les zones surrefroidies les plus \u00e9tendues, ce qui raccourcit le temps de solidification et affine la structure.<\/p>\n

R\u00e9duire la teneur en hydrog\u00e8ne de l'aluminium fondu. Les atomes d'hydrog\u00e8ne peuvent \u00eatre adsorb\u00e9s sur certaines inclusions oxyd\u00e9es, et ces derni\u00e8res peuvent devenir le noyau de la croissance des bulles ; c'est pourquoi les inclusions sont filtr\u00e9es et le gaz qui s'y trouve est \u00e9galement \u00e9limin\u00e9. L\u2019adsorption permet d\u2019\u00e9liminer la teneur en \u00e9l\u00e9ments ind\u00e9sirables (sodium, potassium) de l\u2019aluminium fondu. En fonction des diff\u00e9rentes exigences des clients ou des conditions sur site, le choix d\u2019une plaque filtrante adapt\u00e9e pour garantir la qualit\u00e9 du produit permet de contr\u00f4ler efficacement les inclusions de scories.<\/p>","protected":false},"excerpt":{"rendered":"

Ceramic foam filters for molten metal foundry are used as a means of separating finely divided solid impurities suspended in the melt. It has also…<\/p>","protected":false},"author":1,"featured_media":8964,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8962","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nFilters for Molten Metal Foundry,Ceramic Foam Filter<\/title>\n<meta name=\"description\" content=\"Ceramic foam filters for molten metal foundry are used as a means of separating finely divided solid impurities suspended in the melt.\" \/>\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\/filters-for-molten-metal-foundry\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Filters for Molten Metal 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