Bo\u00eetier de filtre CFF<\/a> est fabriqu\u00e9 dans un mat\u00e9riau r\u00e9fractaire. Il peut r\u00e9sister \u00e0 de multiples chocs thermiques sans se fissurer. Il pr\u00e9sente \u00e9galement les avantages d\u2019une r\u00e9sistance \u00e9lev\u00e9e et de bonnes performances d\u2019isolation. Plus le caisson de filtration est proche de la plaque de d\u00e9rivation, mieux c'est. En effet, cela permet de raccourcir la distance parcourue par l'aluminium en fusion et de r\u00e9duire la r\u00e9g\u00e9n\u00e9ration des oxydes. L'aluminium en fusion s'\u00e9coule depuis l'embouchure du four \u00e0 travers le caisson de filtration, puis s'introduit dans la plaque de distribution par la rainure d'\u00e9coulement.<\/p>\n![\"Syst\u00e8me](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/05\/Filtration-System-1.jpg\")
<\/p>\n
Au d\u00e9marrage du dispositif de filtration, la diff\u00e9rence de niveau avant et apr\u00e8s la filtration de la masse fondue est d'environ 50 mm. Cependant, \u00e0 mesure que la dur\u00e9e de filtration s'allonge, les inclusions \u00e0 la surface de la plaque filtrante et sur la paroi des pores augmentent, le d\u00e9bit de filtration diminue et la diff\u00e9rence de niveau s'accro\u00eet. \u00c0 la fin de la coul\u00e9e, cette diff\u00e9rence s'est accrue pour atteindre 60 \u00e0 120 mm. Le choix de la plaque filtrante d\u00e9pend du d\u00e9bit d'aluminium en fusion.<\/p>\n
D'autre part, il convient de prendre en compte la puret\u00e9 du bain de fusion, la teneur en inclusions et le d\u00e9bit total du bain. Lors de la conception du dispositif de filtration, le caisson de filtration doit \u00eatre choisi en fonction des sp\u00e9cifications de la plaque filtrante s\u00e9lectionn\u00e9e, et il faut tenir compte de la pente de la bouche du four ainsi que de la plaque de d\u00e9rivation. De plus, il convient de veiller \u00e0 ce que le montage et le d\u00e9montage soient tr\u00e8s s\u00fbrs et pratiques. Une fois la coul\u00e9e termin\u00e9e, l'aluminium liquide pr\u00e9sent dans le caisson de filtration peut \u00eatre enti\u00e8rement vidang\u00e9.<\/p>\n
La pratique a d\u00e9montr\u00e9 que la plaque filtrante en c\u00e9ramique alv\u00e9ol\u00e9e constitue un outil efficace pour \u00e9liminer les inclusions oxyd\u00e9es pr\u00e9sentes dans la masse fondue. La filtration g\u00e9n\u00e9rale par fibres ne permet d'\u00e9liminer que les grosses inclusions, tandis que le syst\u00e8me de filtration en c\u00e9ramique alv\u00e9ol\u00e9e permet de retenir \u00e0 la fois les grosses inclusions et les inclusions fines.<\/p>\n
![\"Syst\u00e8me](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/05\/Filtration-System-2.jpg\")
<\/p>\n
La plaque filtrante en c\u00e9ramique alv\u00e9ol\u00e9e pr\u00e9sente une structure en r\u00e9seau multicouche et des trous traversants multidimensionnels, qui communiquent entre eux. Lors de la filtration, l\u2019aluminium fondu entra\u00eene les inclusions le long des canaux sinueux et des pores. Ces inclusions sont alors directement intercept\u00e9es, adsorb\u00e9es et d\u00e9pos\u00e9es lorsque l\u2019aluminium fondu entre en contact avec la structure alv\u00e9ol\u00e9e de la plaque filtrante. Lorsque la masse fondue s'\u00e9coule dans le trou, le canal de la plaque filtrante pr\u00e9sente une courbure. La masse fondue qui s'\u00e9coule \u00e0 travers le canal change alors de direction, et les inclusions entrent en collision avec la paroi du trou, o\u00f9 elles adh\u00e8rent fermement.<\/p>\n
La taille et la porosit\u00e9 permettent de garantir l'efficacit\u00e9 de la plaque filtrante. Plus la porosit\u00e9 de la plaque filtrante est importante, moins l'\u00e9limination des scories est efficace. Pour les pi\u00e8ces moul\u00e9es en aluminium soumises \u00e0 des exigences strictes, il convient de choisir une plaque filtrante \u00e0 faible porosit\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"
The Filtration System is widely used in aluminum water filtration of aluminum casting process. It can prevent particulate impurities in the aluminum liquid from entering…<\/p>","protected":false},"author":1,"featured_media":4303,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[113,138],"tags":[4625,1484,4624,224,225,4626],"class_list":["post-2005","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ceramic-filter-box","category-seo","tag-aluminium-fiter-box","tag-cff-filter-box","tag-filter-box","tag-filtration-system-for-aluminum-casting","tag-porous-ceramic-filter-system","tag-refractory-launders-and-filter-box"],"yoast_head":"\n
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