{"id":4688,"date":"2020-09-11T13:18:41","date_gmt":"2020-09-11T13:18:41","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4688"},"modified":"2020-09-11T13:18:58","modified_gmt":"2020-09-11T13:18:58","slug":"cff-system","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/cff-system\/","title":{"rendered":"Syst\u00e8me CFF"},"content":{"rendered":"

Le r\u00e9chauffeur doit \u00eatre pr\u00e9chauff\u00e9 conform\u00e9ment au temps indiqu\u00e9 sur la courbe de chauffage lors de la premi\u00e8re utilisation du syst\u00e8me CFF, apr\u00e8s une longue p\u00e9riode d'arr\u00eat et avant le remplissage en m\u00e9tal en fusion. L'objectif est d'\u00e9liminer toute trace d'humidit\u00e9 pr\u00e9sente dans le caisson filtrant et d'\u00e9viter la solidification de l'aluminium liquide.<\/p>\n

Pr\u00e9chauffez le syst\u00e8me CFF. Tant que le filtre est encore chaud, d\u00e8s que le filtre en mousse c\u00e9ramique<\/a> m\u00eame s'il est remplac\u00e9, il doit tout de m\u00eame \u00eatre pr\u00e9chauff\u00e9. L'objectif est que le pr\u00e9chauffage du filtre soit uniforme et suffisant pour garantir un remplissage complet du m\u00e9tal. Il existe deux types de proc\u00e9dures de pr\u00e9chauffage du filtre, en fonction des moyens de chauffage dont dispose la cabine. L'une consiste \u00e0 utiliser un br\u00fbleur \u00e0 gaz pr\u00e9chauff\u00e9, et l'autre \u00e0 utiliser un couvercle chauffant.<\/p>\n

Avant le remplissage, il faut que la temp\u00e9rature du Bo\u00eetier de filtre CFF<\/a> Lorsque la temp\u00e9rature atteint 750 \u2103, tous les dispositifs n\u00e9cessaires (bo\u00eete de r\u00e9cup\u00e9ration des m\u00e9taux, chicane, etc.) doivent \u00eatre en place. Les op\u00e9rateurs doivent bien conna\u00eetre le fonctionnement de l'installation et porter un \u00e9quipement de protection thermique adapt\u00e9.<\/p>\n

Le filtre en mousse c\u00e9ramique est un filtre \u00e0 copeaux install\u00e9 en ligne entre le syst\u00e8me de traitement des m\u00e9taux et l'\u00e9quipement de coul\u00e9e. Il remplit une double fonction : filtrer et chauffer l'aluminium fondu. Le principe de filtration repose sur la capacit\u00e9 de l'aluminium fondu \u00e0 retenir les impuret\u00e9s pr\u00e9sentes dans le bain d'aluminium fondu gr\u00e2ce \u00e0 deux plaques filtrantes en c\u00e9ramique. L'efficacit\u00e9 de la filtration d\u00e9pend du nombre de trous dans le m\u00e9dia filtrant, tandis que le d\u00e9bit d\u00e9pend de la taille, du nombre et de la disposition des trous de la plaque filtrante.<\/p>\n

\"Syst\u00e8me<\/p>\n

En raison de sa praticit\u00e9, de son bon rendement de filtration et de son faible co\u00fbt, le filtre en mousse c\u00e9ramique est largement utilis\u00e9 dans le monde entier. Dans les pays d\u00e9velopp\u00e9s, 50% des masses fondues d\u2019alliage d\u2019aluminium sont filtr\u00e9es \u00e0 l\u2019aide de plaques filtrantes en mousse c\u00e9ramique ; celles-ci ont g\u00e9n\u00e9ralement une \u00e9paisseur de 50 m, une longueur et une largeur comprises entre 200 et 600 mm, et leur porosit\u00e9 atteint 80% \u00e0 90%. La filtration ne n\u00e9cessite pas une hauteur de pression tr\u00e8s \u00e9lev\u00e9e. Apr\u00e8s une profondeur initiale de 100 \u00e0 150 m, une profondeur de 2 \u00e0 10 m suffit pour obtenir une filtration efficace, et le prix est bas. Cependant, la plaque filtrante en c\u00e9ramique alv\u00e9ol\u00e9e est fragile et s\u2019ab\u00eeme facilement ; en r\u00e8gle g\u00e9n\u00e9rale, elle n\u2019est utilis\u00e9e qu\u2019une seule fois. Si elle doit \u00eatre utilis\u00e9e deux fois ou plus, des mesures d\u2019isolation thermique doivent \u00eatre prises, mais son utilisation n\u2019est g\u00e9n\u00e9ralement pas autoris\u00e9e au-del\u00e0 de sept fois.<\/p>","protected":false},"excerpt":{"rendered":"

The heater must be preheated according to the heating curve time when the CFF System is used for the first time, shut down for a…<\/p>","protected":false},"author":1,"featured_media":4689,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[4683],"class_list":["post-4688","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-cff-system"],"yoast_head":"\nCFF System for Molten Aluminum - sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"When the CFF System is used for the first time, the heater must be preheated according to the heating curve time, shut down for a long time.\" \/>\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\/cff-system\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CFF System for Molten Aluminum - 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