{"id":9506,"date":"2021-07-09T03:02:45","date_gmt":"2021-07-09T03:02:45","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9506"},"modified":"2021-07-09T03:52:37","modified_gmt":"2021-07-09T03:52:37","slug":"cff-aluminum-melt-filtration","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/cff-aluminum-melt-filtration\/","title":{"rendered":"Filtration de l'aluminium fondu CFF"},"content":{"rendered":"

La filtration de l'aluminium fondu \u00e0 l'aide d'un filtre en mousse c\u00e9ramique (CFF) permet non seulement d'\u00e9liminer les inclusions physiques par interception en surface et adsorption, mais contribue \u00e9galement \u00e0 la purification du solvant. Le filtre en mousse c\u00e9ramique (CFF) est actuellement le filtre le plus largement utilis\u00e9 pour la filtration de l'aluminium fondu. Ses avantages sont une porosit\u00e9 \u00e9lev\u00e9e, une grande efficacit\u00e9 de filtration, un remplacement ais\u00e9, un faible co\u00fbt, une forte adaptabilit\u00e9, et il permet de filtrer les inclusions solides et de s\u00e9parer certaines inclusions liquides.<\/p>\n

Le syst\u00e8me de filtration de l'aluminium en fusion CFF permet d'\u00e9liminer efficacement diverses inclusions pr\u00e9sentes dans la masse d'aluminium en fusion destin\u00e9e \u00e0 la fabrication de barres, de lingots et de plaques d'aluminium, et d'am\u00e9liorer la puret\u00e9 de l'aluminium liquide. Il permet ainsi d'am\u00e9liorer la qualit\u00e9 des barres, des lingots et des plaques d'aluminium, de r\u00e9duire les co\u00fbts et d'accro\u00eetre la productivit\u00e9.<\/p>\n

Filtre en c\u00e9ramique alv\u00e9ol\u00e9e<\/a> Il s'agit d'un produit c\u00e9ramique poreux pr\u00e9sentant une porosit\u00e9 comprise entre 70% et 90%, dot\u00e9 d'une structure r\u00e9ticulaire tridimensionnelle et d'une structure poreuse interp\u00e9n\u00e9trante. Il est largement utilis\u00e9 pour la filtration des m\u00e9taux en fusion dans les alliages non ferreux, la fonte et l'acier moul\u00e9. Le proc\u00e9d\u00e9 de fabrication est le suivant : une mousse plastique sert de squelette, recouverte d'une boue c\u00e9ramique, puis cuite \u00e0 haute temp\u00e9rature.<\/p>\n

\"Mat\u00e9riau<\/p>\n

La mousse c\u00e9ramique pr\u00e9sentant une structure r\u00e9ticulaire tridimensionnelle, son m\u00e9canisme de filtration est le suivant :<\/strong><\/p>\n

En choisissant des c\u00e9ramiques alv\u00e9olaires pr\u00e9sentant une taille de pores adapt\u00e9e, il est possible d'\u00e9liminer, \u00e0 l'aide de m\u00e9thodes m\u00e9caniques de tamisage et de filtration, un grand nombre d'inclusions d'oxydes, de scories et d'autres impuret\u00e9s de grande taille pr\u00e9sentes dans le m\u00e9tal en fusion.<\/p>\n

\u00c0 mesure que le nombre d'inclusions retenues augmente, un \u201c g\u00e2teau de filtration \u201d compos\u00e9 de grosses inclusions se forme \u00e0 la surface de l'entr\u00e9e du tamis de filtration, ce qui permet d'am\u00e9liorer l'efficacit\u00e9 de la filtration.<\/p>\n

Le filtre en mousse c\u00e9ramique pr\u00e9sente une grande surface interne, ce qui favorise l'adsorption d'un grand nombre d'impuret\u00e9s fines. Parall\u00e8lement, lorsque le m\u00e9tal liquide traverse la mousse c\u00e9ramique, son \u00e9coulement passe d'un r\u00e9gime turbulent \u00e0 un r\u00e9gime laminaire, ce qui modifie l'\u00e9tat de l'\u00e9coulement et rend le remplissage plus stable.<\/p>\n

Par cons\u00e9quent, ce proc\u00e9d\u00e9 permet de r\u00e9duire efficacement les d\u00e9fauts li\u00e9s aux inclusions de scories, de diminuer la teneur en gaz et en \u00e9l\u00e9ments nocifs dans le m\u00e9tal en fusion, d\u2019am\u00e9liorer la structure et les propri\u00e9t\u00e9s m\u00e9caniques, ainsi que d\u2019augmenter le rendement global et d\u2019am\u00e9liorer la qualit\u00e9 de surface des pi\u00e8ces moul\u00e9es.<\/p>","protected":false},"excerpt":{"rendered":"

CFF (Ceramic Foam Filter) aluminum melt filtration can not only remove physical inclusions through surface interception and adsorption, but also has the effect of solvent…<\/p>","protected":false},"author":1,"featured_media":9507,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9506","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nCFF Aluminum Melt Filtration, Ceramic Foam Filter Filtering Mechanism<\/title>\n<meta name=\"description\" content=\"CFF (Ceramic Foam Filter) aluminum melt filtration can not only remove physical inclusions through surface interception and adsorption...\" \/>\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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