{"id":11654,"date":"2021-12-07T08:35:23","date_gmt":"2021-12-07T08:35:23","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11654"},"modified":"2021-12-07T08:35:23","modified_gmt":"2021-12-07T08:35:23","slug":"molten-aluminum-filtering-process","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/molten-aluminum-filtering-process\/","title":{"rendered":"Proc\u00e9d\u00e9 de filtration de l'aluminium en fusion"},"content":{"rendered":"

Le proc\u00e9d\u00e9 de filtration de l'aluminium fondu consiste \u00e0 \u00e9liminer les inclusions, principalement des oxydes et des substances non m\u00e9talliques, \u00e0 l'aide d'un filtre.<\/p>\n

Les m\u00e9thodes couramment utilis\u00e9es pour filtrer et \u00e9liminer les scories ou les impuret\u00e9s de l'aluminium fondu sont la filtration sur mousse c\u00e9ramique, la filtration sur sable \u00e0 billes d'alumine et la filtration sur tubes c\u00e9ramiques. Chacune pr\u00e9sente des avantages et des inconv\u00e9nients, et il convient de proc\u00e9der \u00e0 une \u00e9valuation et \u00e0 un choix judicieux en fonction des exigences du produit final et du proc\u00e9d\u00e9 de fabrication utilis\u00e9. Cependant, en raison de ses avantages uniques, plaque filtrante en mousse c\u00e9ramique<\/a> reste la meilleure m\u00e9thode pour filtrer et purifier l'aluminium fondu.<\/p>\n

Comme nous le savons tous, les inclusions pr\u00e9sentes dans la masse d'aluminium fondu se pr\u00e9sentent g\u00e9n\u00e9ralement sous trois formes : les oxydes m\u00e9talliques, les d\u00e9chets de mat\u00e9riaux r\u00e9fractaires et autres particules \u00e9trang\u00e8res, ainsi que les particules capt\u00e9es au cours du traitement de la masse fondue.<\/p>\n

Il existe globalement trois m\u00e9thodes pour \u00e9liminer les particules en suspension lors du processus de filtration de l'aluminium fondu :<\/p>\n

Au cours de la s\u00e9dimentation, les particules s'accumulent au fond de la masse fondue ;
\nEn flottant, les inclusions remontent \u00e0 la surface de la masse fondue et s'y accumulent ;
\nLa filtration, qui consiste \u00e0 s\u00e9parer les particules de la masse fondue \u00e0 l'aide d'un milieu poreux.<\/p>\n

\"Filtre<\/p>\n

La s\u00e9dimentation naturelle se produit g\u00e9n\u00e9ralement lorsque la densit\u00e9 des particules est relativement \u00e9lev\u00e9e et que celles-ci sont grossi\u00e8res ; la s\u00e9dimentation statique des particules inf\u00e9rieures \u00e0 90 \u00b5m n\u2019est pas tr\u00e8s efficace. Les bulles ou les solvants en fusion g\u00e9n\u00e9r\u00e9s lors de l\u2019\u00e9limination des gaz, dans le cadre du retrait de l\u2019hydrog\u00e8ne ou du traitement par solvant, peuvent faire remonter les particules d\u2019inclusion \u00e0 la surface de la masse fondue. Ce m\u00e9canisme n'est g\u00e9n\u00e9ralement pas fiable non plus pour \u00e9liminer les petites inclusions de 30 \u00b5m \u00e0 40 \u00b5m dans la plupart des cas. La filtration d\u00e9signe le processus par lequel la masse fondue s'\u00e9coule \u00e0 travers des sph\u00e8res dens\u00e9ment agenc\u00e9es, des tissus en fibre de verre, des mailles m\u00e9talliques, des plaques filtrantes en c\u00e9ramique alv\u00e9ol\u00e9e ou d'autres milieux poreux afin de s\u00e9parer les particules d'inclusion de la masse fondue.<\/p>\n

L'avantage de la plaque filtrante en c\u00e9ramique alv\u00e9ol\u00e9e r\u00e9side dans sa capacit\u00e9 \u00e0 \u00e9liminer les particules d'inclusions dont le diam\u00e8tre est bien inf\u00e9rieur \u00e0 celui de ses trous traversants. La plaque filtrante en c\u00e9ramique alv\u00e9ol\u00e9e s\u00e9pare les inclusions par tamisage, filtration en g\u00e2teau et filtration en lit profond.<\/p>","protected":false},"excerpt":{"rendered":"

The molten aluminum filtering process is a process of removing inclusions mainly including oxides and non-metallic substances in the filter. Common methods for filtering and…<\/p>","protected":false},"author":1,"featured_media":11655,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[1714,13005],"class_list":["post-11654","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-ceramic-foam-filtration","tag-molten-aluminum-filtering-process"],"yoast_head":"\nMolten Aluminum Filtering Process, Ceramic Foam Filtration<\/title>\n<meta name=\"description\" content=\"The molten aluminum filtering process is a process of removing inclusions mainly including oxides and non-metallic substances in the filter.\" \/>\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\/molten-aluminum-filtering-process\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" 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