{"id":27498,"date":"2023-08-03T06:38:13","date_gmt":"2023-08-03T06:38:13","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?page_id=27498"},"modified":"2023-08-03T06:38:13","modified_gmt":"2023-08-03T06:38:13","slug":"purification-mechanism-of-foam-ceramic-filter","status":"publish","type":"page","link":"https:\/\/www.alalloycasting.com\/fr\/alumina-ceramic-foam-filter\/purification-mechanism-of-foam-ceramic-filter\/","title":{"rendered":"M\u00e9canisme de purification d'un filtre en c\u00e9ramique alv\u00e9olaire"},"content":{"rendered":"

M\u00e9canisme de purification d'un filtre en c\u00e9ramique alv\u00e9olaire<\/strong><\/p>\n

Le filtre en c\u00e9ramique alv\u00e9ol\u00e9e<\/a> peut intercepter efficacement les inclusions pr\u00e9sentes dans le m\u00e9tal en fusion et am\u00e9liorer la qualit\u00e9 et le rendement de la coul\u00e9e. L'\u00e9tude du m\u00e9canisme de purification du filtre en c\u00e9ramique alv\u00e9olaire peut fournir une base th\u00e9orique pour l'am\u00e9lioration et l'application de ce filtre.<\/p>\n

Une fois que le m\u00e9canisme de s\u00e9paration par flottation a plac\u00e9 le filtre en c\u00e9ramique poreuse<\/a> Dans le syst\u00e8me de coul\u00e9e, la r\u00e9sistance \u00e0 l'\u00e9coulement du m\u00e9tal augmente et le m\u00e9tal en fusion remplit enti\u00e8rement le syst\u00e8me de coul\u00e9e, ce qui permet \u00e0 celui-ci de remplir sa fonction de blocage des scories. Parall\u00e8lement, le flux de m\u00e9tal en fusion inject\u00e9 par la canalisation d'alimentation est \u00e9trangl\u00e9 par un filtre, et le m\u00e9tal en fusion reste bri\u00e8vement dans la canalisation d'alimentation. Les scories de faible densit\u00e9 flottent et se s\u00e9parent, ce qui produit le m\u00eame effet que dans un syst\u00e8me de coul\u00e9e par le fond. Lorsque le m\u00e9tal en fusion continue de s'\u00e9couler \u00e0 travers le filtre en c\u00e9ramique alv\u00e9ol\u00e9e, d'une part, les scories de faible densit\u00e9 remontent \u00e0 la surface, et d'autre part, le tourbillon est efficacement r\u00e9duit, voire \u00e9limin\u00e9.
\nLe filtre en c\u00e9ramique \u00e0 mousse fonctionnant selon le m\u00e9canisme du \u201c g\u00e2teau de filtration \u201d est constitu\u00e9 d\u2019un canal en zigzag capable de retenir efficacement les scories par voie m\u00e9canique. De nombreuses inclusions plus grandes que les mailles du filtre sont pi\u00e9g\u00e9es \u00e0 l\u2019entr\u00e9e de celui-ci. \u00c0 mesure que le nombre d\u2019inclusions captur\u00e9es augmente, un \u201c g\u00e2teau de filtration \u201d compos\u00e9 de ces grosses inclusions se forme \u00e0 la surface de l\u2019extr\u00e9mit\u00e9 d\u2019entr\u00e9e du filtre. Ce \u201c g\u00e2teau de filtration \u201d affine l'\u00e9coulement du fluide, de sorte que les inclusions plus petites que la taille des mailles du filtre sont \u00e9galement partiellement retenues sur le \u201c g\u00e2teau de filtration \u201d.<\/p>\n

\"filtre
filtre en c\u00e9ramique alv\u00e9ol\u00e9e<\/figcaption><\/figure>\n

Le filtre \u00e0 m\u00e9canisme d'adsorption est plac\u00e9 dans la rainure transversale ou interne de la cavit\u00e9 du moule, et le processus de filtration rel\u00e8ve de la filtration en profondeur. Lorsque le premier flux de liquide atteint la surface de l'extr\u00e9mit\u00e9 d'entr\u00e9e du filtre, une adsorption se produit entre le flux de liquide et la grille en mousse, et, simultan\u00e9ment, un ph\u00e9nom\u00e8ne d\u201c\u201d impact \u201c du flux de liquide se produit. Le filtre lui-m\u00eame a \u00e9galement pour fonction de bloquer le flux. Sous une certaine pression, certaines impuret\u00e9s sont facilement pi\u00e9g\u00e9es et absorb\u00e9es en raison de la relation \u00e9troite de \u201d correspondance coh\u00e9rente \u00bb entre les inclusions et les grilles en c\u00e9ramique alv\u00e9ol\u00e9e solide. Cette adsorption repose principalement sur l\u2019adsorption physique de multiples couches mol\u00e9culaires sans s\u00e9lection, les inclusions adh\u00e9rant couche par couche \u00e0 la maille du filtre jusqu\u2019\u00e0 ce que celui-ci soit obstru\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"

Purification mechanism of foam ceramic filter The foam ceramic filter can effectively intercept the inclusions in the liquid metal, and improve the casting quality and…<\/p>","protected":false},"author":1,"featured_media":27505,"parent":237,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-27498","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"\nPurification mechanism of foam ceramic filter<\/title>\n<meta name=\"description\" content=\"Purification mechanism of foam ceramic filterThe foam ceramic filter can effectively intercept the inclusions in the liquid metal, and improve...\" \/>\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\/alumina-ceramic-foam-filter\/purification-mechanism-of-foam-ceramic-filter\/\" \/>\n<meta property=\"og:locale\" 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