{"id":11185,"date":"2021-11-13T08:18:59","date_gmt":"2021-11-13T08:18:59","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11185"},"modified":"2021-11-12T08:25:19","modified_gmt":"2021-11-12T08:25:19","slug":"rotary-degasser-unit","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/rotary-degasser-unit\/","title":{"rendered":"Unit\u00e9 de d\u00e9gazage rotative"},"content":{"rendered":"

De l'argon (contenant une faible quantit\u00e9 de chlore gazeux) est inject\u00e9 dans le d\u00e9gazeur rotatif en ligne afin d'\u00e9liminer les gaz pr\u00e9sents dans la masse fondue. La masse fondue d'aluminium est ensuite filtr\u00e9e successivement \u00e0 travers un filtre en c\u00e9ramique et un filtre \u00e0 lit profond afin d'\u00e9liminer les inclusions solides non m\u00e9talliques qu'elle contient.<\/p>\n

Le proc\u00e9d\u00e9 de d\u00e9gazage inerte par buse rotative est un type de dispositif de traitement de la masse d'aluminium fondu \u00e0 l'ext\u00e9rieur du four. Cette unit\u00e9 de d\u00e9gazage rotative est \u00e9quip\u00e9e d'une buse rotative en graphite dans la chambre de r\u00e9action ; le gaz traverse le rotor de la buse pour former de fines bulles dispers\u00e9es. Parall\u00e8lement, gr\u00e2ce \u00e0 l'agitation du bain fondu par le rotor, les bulles sont r\u00e9parties uniform\u00e9ment dans l'ensemble du bain fondu, produisant ainsi un effet de purification par \u00e9vacuation et \u00e9limination des scories<\/a>.<\/p>\n

La plaque filtrante en mousse c\u00e9ramique est fabriqu\u00e9e en injectant un m\u00e9lange de boue d'alumine et de phosphate dans de la mousse plastique, puis en proc\u00e9dant \u00e0 un s\u00e9chage et \u00e0 un frittage afin d'\u00e9liminer la mousse plastique. On peut \u00e9galement la d\u00e9crire comme une feuille c\u00e9ramique en mousse microporeuse pr\u00e9sentant une structure de type \u00e9ponge.<\/p>\n

Les plaques filtrantes en c\u00e9ramique alv\u00e9ol\u00e9e sont faciles \u00e0 utiliser, offrent une bonne efficacit\u00e9 de filtration, sont peu co\u00fbteuses et sont largement utilis\u00e9es dans le monde entier. Plus de 50% de fonte d\u2019alliage d\u2019aluminium sont filtr\u00e9s \u00e0 l\u2019aide de plaques filtrantes en c\u00e9ramique alv\u00e9ol\u00e9e dans les pays d\u00e9velopp\u00e9s.<\/p>\n

\"Filtre<\/p>\n

Le filtre \u00e0 lit profond est constitu\u00e9 d'un caisson m\u00e9tallique dot\u00e9 d'un rev\u00eatement isolant thermique haute performance \u00e0 l'int\u00e9rieur et d'un rev\u00eatement en fonte r\u00e9fractaire. Le caisson est ferm\u00e9 par un couvercle de chauffage sup\u00e9rieur, qui assure \u00e9galement le pr\u00e9chauffage du filtre. Le corps du caisson est g\u00e9n\u00e9ralement compos\u00e9 de deux cavit\u00e9s : la cavit\u00e9 d'entr\u00e9e est \u00e9quip\u00e9e d'une couche filtrante, laquelle est soutenue par une grille.<\/p>\n

Le lit filtrant est compos\u00e9 de nombreuses couches de billes d'alumine et de gravier. Le choix de la granulom\u00e9trie du mat\u00e9riau filtrant et la r\u00e9partition des diff\u00e9rentes couches jouent un r\u00f4le essentiel dans l'optimisation de l'efficacit\u00e9 de la filtration et la prolongation de la dur\u00e9e de vie du lit filtrant.<\/p>\n

Lors de son utilisation, le filtre est chauff\u00e9 et isol\u00e9 par les dispositifs de chauffage sup\u00e9rieurs et inf\u00e9rieurs, ce qui permet de prolonger sa dur\u00e9e de vie ; la quantit\u00e9 de m\u00e9tal coul\u00e9 peut d\u00e9passer 7 000 tonnes. Le filtre \u00e0 lit profond est donc adapt\u00e9 \u00e0 la production d'alliages d'aluminium en grandes s\u00e9ries.<\/p>","protected":false},"excerpt":{"rendered":"

Argon gas (containing a small amount of chlorine gas) is introduced into the online rotary degasser unit to remove the gas in the melt. The…<\/p>","protected":false},"author":1,"featured_media":11189,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12804,12803],"class_list":["post-11185","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminum-melt-degassing-purification","tag-rotary-degasser-unit"],"yoast_head":"\nRotary Degasser Unit, Aluminum Melt Degassing Purification<\/title>\n<meta name=\"description\" content=\"The rotary degasser unit is equipped with rotating nozzle in the reaction chamber, and the gas passes through the rotor to form bubbles.\" \/>\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\/rotary-degasser-unit\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" 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