{"id":10244,"date":"2021-09-10T05:58:29","date_gmt":"2021-09-10T05:58:29","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10244"},"modified":"2021-09-10T05:58:29","modified_gmt":"2021-09-10T05:58:29","slug":"foundries-filters","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/foundries-filters\/","title":{"rendered":"Filtres pour fonderies"},"content":{"rendered":"

L'aluminium en fusion passe \u00e0 travers des filtres de fonderie, de sorte que les particules d'impuret\u00e9s pr\u00e9sentes dans la masse fondue soient retenues \u00e0 la surface du m\u00e9dia filtrant ou pi\u00e9g\u00e9es \u00e0 l'int\u00e9rieur de celui-ci, afin d'assurer la purification de l'aluminium en fusion.<\/p>\n

Bien que la plupart des inclusions de scories soient \u00e9limin\u00e9es du bain d'aluminium en fusion lors de l'affinage, certaines particules fines de scories, en particulier celles dont la taille est inf\u00e9rieure \u00e0 quelques microns, sont difficiles \u00e0 \u00e9liminer par affinage en four et par affinage en ligne, et restent en suspension dans le bain d'aluminium en fusion. Un traitement de filtration rigoureux est donc n\u00e9cessaire avant la coul\u00e9e et le laminage.<\/p>\n

Il existe de nombreux filtres de fonderie destin\u00e9s \u00e0 la filtration de l'aluminium en fusion, notamment les filtres \u00e0 tubes en corindon, les filtres \u00e0 lit profond, m\u00e9dium filtrant en c\u00e9ramique alv\u00e9ol\u00e9e<\/a> etc. \u00c0 l'heure actuelle, le filtre en c\u00e9ramique alv\u00e9olaire est le plus r\u00e9pandu. Il pr\u00e9sente une structure poreuse homog\u00e8ne, une grande r\u00e9sistance superficielle, une r\u00e9sistance \u00e0 des temp\u00e9ratures allant jusqu'\u00e0 1 100 \u00b0C et une excellente r\u00e9sistance aux produits chimiques utilis\u00e9s dans les fonderies.<\/p>\n

\"Filtre<\/p>\n

Les conditions de coul\u00e9e varient d'une fonderie d'aluminium \u00e0 l'autre, ce qui explique que les filtres utilis\u00e9s diff\u00e8rent \u00e9galement.<\/p>\n

Par rapport \u00e0 la coul\u00e9e et au laminage, les conditions de production de la coul\u00e9e sont plus complexes. Le d\u00e9bit est important, et le filtrage s'effectue de la m\u00eame mani\u00e8re que pour la production par coul\u00e9e-laminage. Le d\u00e9bit du filtre est sup\u00e9rieur de 2,5 \u00e0 3,5 fois \u00e0 celui de la production par coul\u00e9e-laminage, ce qui r\u00e9duit l'efficacit\u00e9 de la filtration. Par cons\u00e9quent, afin de garantir la m\u00eame efficacit\u00e9 de filtration, la section de passage du filtre doit \u00eatre augment\u00e9e de mani\u00e8re \u00e0 ce que le d\u00e9bit par unit\u00e9 de surface du filtre reste identique.<\/p>\n

Les masses fondues de duralumin et d\u2019alliages d\u2019aluminium ultra-durs sont plus susceptibles de contenir de minuscules particules de scories que l\u2019aluminium pur et les alliages tendres. C\u2019est pourquoi l\u2019efficacit\u00e9 de la filtration doit \u00eatre consid\u00e9rablement am\u00e9lior\u00e9e afin d\u2019obtenir une masse fondue de haute puret\u00e9 et de garantir la qualit\u00e9 du produit final. Il est donc pr\u00e9f\u00e9rable d\u2019utiliser un filtre tubulaire, qui non seulement augmente la surface de filtration en contact avec la masse fondue, mais r\u00e9duit \u00e9galement le d\u00e9bit par unit\u00e9 de surface de la masse fondue, garantit l\u2019efficacit\u00e9 de la filtration et le d\u00e9bit total, et r\u00e9pond aux besoins de la production. Cela augmente la hauteur de pression initiale de la masse fondue filtr\u00e9e, ce qui complique le fonctionnement et, par la m\u00eame occasion, augmente le co\u00fbt de la filtration.<\/p>","protected":false},"excerpt":{"rendered":"

The aluminum melt passes through foundries filters, so that the impurity particles in the melt are intercepted by the surface of the filter medium or…<\/p>","protected":false},"author":1,"featured_media":10246,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12668,12669],"class_list":["post-10244","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-foundries-filters","tag-molten-aluminum-filtering-equipment"],"yoast_head":"\nFoundries Filters, Molten Aluminum Filtering Equipment<\/title>\n<meta name=\"description\" content=\"The aluminum melt passes through foundries filters, so that the impurity particles in the melt are intercepted by the surface of the filter.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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