plaque filtrante en mousse c\u00e9ramique<\/a> dispose d'une structure r\u00e9ticulaire tridimensionnelle unique et de produits c\u00e9ramiques poreux dot\u00e9s d'une structure poreuse interp\u00e9n\u00e9trante.<\/p>\nLa plaque filtrante en c\u00e9ramique expans\u00e9e filtre et \u00e9limine les impuret\u00e9s, ce qui permet d'am\u00e9liorer consid\u00e9rablement la qualit\u00e9 des lingots et de r\u00e9duire le taux de rebut. Depuis lors, la recherche et le d\u00e9veloppement dans le domaine des mat\u00e9riaux filtrants en c\u00e9ramique expans\u00e9e ont \u00e9t\u00e9 encourag\u00e9s dans l'industrie m\u00e9tallurgique.<\/p>\n
La fabrication d'un filtre en mousse c\u00e9ramique (CFF) repose g\u00e9n\u00e9ralement sur l'utilisation d'une structure r\u00e9ticulaire tridimensionnelle et d'une mousse organique \u00e0 pores interconnect\u00e9s servant de support ; celle-ci est plong\u00e9e dans une boue c\u00e9ramique sp\u00e9ciale pr\u00e9sentant des propri\u00e9t\u00e9s thixotropiques, puis un proc\u00e9d\u00e9 sp\u00e9cial d'extrusion au rouleau est utilis\u00e9 pour r\u00e9partir uniform\u00e9ment la boue c\u00e9ramique sur la structure du support, puis celle-ci est s\u00e9ch\u00e9e et solidifi\u00e9e avant d'\u00eatre cuite \u00e0 haute temp\u00e9rature.<\/p>\n
Le m\u00e9canisme de filtration de l'aluminium fondu \u00e0 l'aide d'un filtre en mousse c\u00e9ramique est g\u00e9n\u00e9ralement d\u00e9crit comme une interception par diffusion et une interception par collision inertielle, ou encore comme un criblage, une s\u00e9dimentation et une filtration en lit profond.<\/p>\n
Lorsque le m\u00e9tal en fusion traverse le filtre en mousse c\u00e9ramique \u00e0 structure complexe, le milieu filtrant retient les inclusions dont la taille est sup\u00e9rieure \u00e0 celle des pores de la surface du filtre par s\u00e9paration m\u00e9canique, et les fait pr\u00e9cipiter \u00e0 l'extr\u00e9mit\u00e9 d'entr\u00e9e du filtre o\u00f9 s'\u00e9coule le m\u00e9tal liquide.<\/p>\n
\u00c0 mesure que les inclusions s'accumulent \u00e0 la surface du filtre, une couche de \u201c g\u00e2teau de filtration \u201d se forme progressivement, ce qui r\u00e9tr\u00e9cit encore davantage le canal d'\u00e9coulement du m\u00e9tal en fusion. La surface du m\u00e9dia filtrant permet ainsi de retenir les inclusions les plus fines. Parall\u00e8lement, le m\u00e9dia de filtration exerce \u00e9galement une fonction de filtration, et n\u2019importe quelle zone peut servir \u00e0 intercepter les inclusions.<\/p>","protected":false},"excerpt":{"rendered":"
The technology of ceramic foam filtration outside the furnace has long been an important means of purifying molten aluminum. Reflected in the alloying, purification and…<\/p>","protected":false},"author":1,"featured_media":11885,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[13066,8519],"class_list":["post-11884","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-ceramic-foam-aluminum-filtration","tag-ceramic-foam-filter-cff"],"yoast_head":"\n
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