{"id":10527,"date":"2021-10-11T07:54:34","date_gmt":"2021-10-11T07:54:34","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10527"},"modified":"2022-03-10T05:22:53","modified_gmt":"2022-03-10T05:22:53","slug":"online-metal-degassing-system","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/online-metal-degassing-system\/","title":{"rendered":"Syst\u00e8me de d\u00e9gazage des m\u00e9taux en ligne"},"content":{"rendered":"

Un syst\u00e8me de d\u00e9gazage du m\u00e9tal en ligne a d\u00e9sormais \u00e9t\u00e9 install\u00e9 entre le four de maintien et la station de coul\u00e9e, afin d'\u00e9liminer les impuret\u00e9s. De nombreux syst\u00e8mes de d\u00e9gazage fonctionnent de mani\u00e8re automatique ; l'\u00e9limination des impuret\u00e9s est tr\u00e8s efficace et ne n\u00e9cessite pas trop d'efforts.<\/p>\n

Comment fonctionne le dispositif de d\u00e9gazage ?<\/strong><\/p>\n

En g\u00e9n\u00e9ral, un gaz inerte, tel que l'argon, est pulv\u00e9ris\u00e9 dans le bain de fusion \u00e0 l'aide d'une ou plusieurs buses rotatives, ou d'autres dispositifs de pulv\u00e9risation, et les bulles d'argon pulv\u00e9ris\u00e9es doivent saturer l'aluminium fondu. Lorsque le gaz de traitement remonte \u00e0 la surface du bain d'aluminium, l'hydrog\u00e8ne dissous est s\u00e9par\u00e9 de l'aluminium fondu. On ajoute une petite quantit\u00e9 de chlore gazeux, g\u00e9n\u00e9ralement 0,51 TP3T du volume total de gaz, afin de rompre la liaison entre l\u2019aluminium et les inclusions non mouillantes, de sorte que les bulles ascendantes et les inclusions s\u2019agglom\u00e8rent et remontent \u00e0 la surface de la solution.<\/p>\n

Le chlore gazeux ajout\u00e9 peut r\u00e9agir chimiquement avec le m\u00e9tal alcalin pr\u00e9sent dans la masse d'aluminium fondu, former des sels de chlorure, remonter \u00e0 la surface, former des cendres d'aluminium, puis \u00eatre \u00e9cum\u00e9 par le dispositif de d\u00e9gazage.<\/p>\n

\"\"<\/p>\n

Performances du syst\u00e8me de d\u00e9gazage des m\u00e9taux en ligne<\/strong><\/p>\n

L'efficacit\u00e9 du d\u00e9gazage d\u00e9pend de la capacit\u00e9 du m\u00e9tal en ligne syst\u00e8me de d\u00e9gazage<\/a>, c'est-\u00e0-dire pour saturer compl\u00e8tement le bain d'aluminium fondu. Il s'agit de faire en sorte que les petites bulles restent le plus longtemps possible dans le bain d'aluminium, afin que la surface du bain soit calme, sans turbulence, et que les inclusions et le sel remontent \u00e0 la surface du bain d'aluminium.<\/p>\n

La conception de la buse du rotor, le d\u00e9bit de gaz et la g\u00e9om\u00e9trie du bain de fusion sont autant de facteurs essentiels pour obtenir le meilleur d\u00e9gazage possible.<\/p>\n

Le dispositif de pulv\u00e9risation doit pulv\u00e9riser une quantit\u00e9 suffisante de gaz de traitement sur l'ensemble du bain de fusion, tout en veillant \u00e0 ne pas provoquer de turbulences. Une vitesse de rotor trop \u00e9lev\u00e9e et l'absence de d\u00e9flecteur adapt\u00e9 peuvent entra\u00eener des turbulences dans le bain d'aluminium et provoquer le rem\u00e9langeage de l'hydrog\u00e8ne et des cendres d'aluminium dans le bain de fusion.<\/p>\n

Le temps de r\u00e9action appropri\u00e9 de la bulle dans le chambre de d\u00e9gazage<\/a> est un autre param\u00e8tre de proc\u00e9d\u00e9 important pour un d\u00e9gazage efficace. Le calcul du temps de s\u00e9jour des bulles dans le bain de fusion, ainsi que le d\u00e9bit de l'eau d'aluminium, sont autant de facteurs \u00e0 prendre en compte lors du choix d'un dispositif de d\u00e9gazage. La profondeur du bain de fusion influe \u00e9galement de mani\u00e8re objective sur les performances de d\u00e9gazage. Plus le gaz est inject\u00e9 profond\u00e9ment dans la masse fondue, plus il faut de temps aux bulles pour remonter \u00e0 la surface de l'aluminium fondu, et plus le temps de s\u00e9jour des bulles est long.<\/p>","protected":false},"excerpt":{"rendered":"

Now an online metal degassing system has been installed between the standing furnace and the casting station, so as to remove impurities. Many degassing systems…<\/p>","protected":false},"author":1,"featured_media":10530,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-10527","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-degassing-unit"],"yoast_head":"\nOnline Metal Degassing System -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Now an online metal degassing system has been installed between the standing furnace and the casting station, so as to remove impurities.\" \/>\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\/online-metal-degassing-system\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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