filtre en mousse c\u00e9ramique<\/a> En raison de sa structure complexe, la s\u00e9paration m\u00e9canique retient les inclusions plus grosses que les pores \u00e0 la surface du filtre et les d\u00e9pose \u00e0 l\u2019extr\u00e9mit\u00e9 d\u2019entr\u00e9e du m\u00e9tal en fusion du filtre, o\u00f9 elles deviennent partie int\u00e9grante de celui-ci. \u00c0 mesure que l\u2019accumulation d\u2019inclusions \u00e0 la surface du filtre augmente, une couche de \u201c g\u00e2teau de filtration \u201d se forme progressivement, ce qui r\u00e9tr\u00e9cit encore davantage le canal d\u2019\u00e9coulement du m\u00e9tal en fusion. Par cons\u00e9quent, la surface du nouveau m\u00e9dia filtrant permet de retenir des inclusions plus fines. Parall\u00e8lement, l\u2019int\u00e9rieur du m\u00e9dia exerce \u00e9galement un effet filtrant : parmi les nombreux petits trous traversant le corps en c\u00e9ramique, certains pr\u00e9sentent de minuscules fentes, tandis que d\u2019autres comportent des angles morts. Ces zones pr\u00e9sentant des configurations vari\u00e9es constituent des emplacements potentiels pour l\u2019interception des inclusions, et un effet de \u201c g\u00e2teau de filtration \u201d se produit \u00e9galement \u00e0 l\u2019int\u00e9rieur du filtre.<\/p>\n![\"\"](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/08\/Molten-Alu-Purification-Treatment.jpg\")
<\/p>\n
Effet de surface : lorsque le m\u00e9tal en fusion s'\u00e9coule \u00e0 travers le corps en c\u00e9ramique \u00e0 structure complexe, il se divise en de nombreux petits flux, ce qui augmente la surface de contact et la probabilit\u00e9 de contact entre les impuret\u00e9s pr\u00e9sentes dans le m\u00e9tal en fusion et le m\u00e9dia filtrant. La surface du filtre \u00e9tant constitu\u00e9e d\u2019innombrables petites surfaces convexes et concaves, dont la taille des parties concaves est d\u2019environ 1 \u00e0 10 \u00b5m, cela permet une adsorption \u00e9lectrostatique et une adh\u00e9rence qui interceptent les inclusions.<\/p>\n
Effet de rectification : lorsque le m\u00e9tal en fusion traverse le filtre en mousse c\u00e9ramique, il se divise en de nombreux petits flux, ce qui fait que l'\u00e9coulement du liquide tend \u00e0 se transformer en \u00e9coulement laminaire. Lorsque le m\u00e9tal en fusion se trouve dans un \u00e9tat d'\u00e9coulement laminaire, la densit\u00e9 du m\u00e9tal en fusion \u00e9tant bien sup\u00e9rieure \u00e0 celle des inclusions, ces derni\u00e8res disposent de suffisamment de temps pour remonter \u00e0 la surface et \u00eatre \u00e9limin\u00e9es.<\/p>","protected":false},"excerpt":{"rendered":"
Foam ceramic filters for metal casting have been widely used in aluminum foundry because of their good economic benefits and strong impurity removal function. The…<\/p>","protected":false},"author":1,"featured_media":9888,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12356,1729,12355],"class_list":["post-9887","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-filter-for-metal-casting","tag-foam-ceramic-filters","tag-metal-filtration-mechanism"],"yoast_head":"\n
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