{"id":11596,"date":"2021-12-01T08:41:51","date_gmt":"2021-12-01T08:41:51","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11596"},"modified":"2021-12-01T08:42:39","modified_gmt":"2021-12-01T08:42:39","slug":"degasser-system","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/degasser-system\/","title":{"rendered":"Syst\u00e8me de d\u00e9gazage"},"content":{"rendered":"<p>Le syst\u00e8me de d\u00e9gazage utilise le rotor int\u00e9gr\u00e9 au stator pour \u00e9liminer les gaz de l'aluminium fondu. Les syst\u00e8mes de d\u00e9gazage de l'aluminium fondu utilisent g\u00e9n\u00e9ralement un ou plusieurs dispositifs \u00e0 rotor rotatif pour injecter du gaz inerte. Le dispositif \u00e0 rotor rotatif introduit g\u00e9n\u00e9ralement du gaz inerte (tel que l'argon) dans le m\u00e9tal en fusion sous forme de nombreuses bulles, et le rotor peut cisailler et disperser ces bulles dans le m\u00e9tal en fusion afin de saturer ce dernier avec le gaz inerte.<\/p>\n<p><strong>Fonctionnement du syst\u00e8me de d\u00e9gazage<\/strong><\/p>\n<p>Le gaz inerte est g\u00e9n\u00e9ralement inject\u00e9 dans le m\u00e9tal en fusion pr\u00e8s du fond de la cuve de contenance ; les bulles se dispersent et remontent \u00e0 la surface du bain de fusion, adsorbant ainsi l'hydrog\u00e8ne dissous au cours du processus. L'ajout d'une petite quantit\u00e9 de chlore peut aider \u00e0 rompre la liaison entre l'aluminium fondu et les inclusions, de sorte que celles-ci aient plus de chances d'adh\u00e9rer aux bulles ascendantes et d'\u00eatre entra\u00een\u00e9es vers la surface de l'aluminium fondu. Une quantit\u00e9 suppl\u00e9mentaire de chlore peut \u00eatre ajout\u00e9e au gaz inerte afin de r\u00e9agir chimiquement avec les m\u00e9taux alcalins entrants (tels que le sodium, le lithium, le calcium ou d\u2019autres) pour former des sels de chlorure, qui remontent \u00e9galement \u00e0 la surface de l\u2019aluminium fondu.<\/p>\n<p>En r\u00e8gle g\u00e9n\u00e9rale, les inclusions, les sels solides et autres mati\u00e8res flottant \u00e0 la surface de la masse fondue forment ce qu'on appelle une \u00ab \u00e9cume \u00bb, qui peut \u00eatre \u00e9cum\u00e9e et \u00e9limin\u00e9e comme d\u00e9chet.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-11598\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/12\/Metal-Degassing-System.jpg\" alt=\"\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/12\/Metal-Degassing-System.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2021\/12\/Metal-Degassing-System-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>Il est g\u00e9n\u00e9ralement pr\u00e9f\u00e9rable d'utiliser de petites bulles afin d'optimiser la saturation de l'aluminium fondu et de maintenir une surface calme du bain de fusion, ce qui favorise davantage la remont\u00e9e et le pi\u00e9geage des inclusions et des sels \u00e0 la surface du bain. La r\u00e9alisation de ces objectifs permet g\u00e9n\u00e9ralement d'obtenir une meilleure s\u00e9paration de l'aluminium fondu et des scories.<\/p>\n<p>Le <a href=\"http:\/\/www.alalloycasting.com\/fr\/rotating-rotor-degassing\/\">rotor en rotation<\/a> peut en effet servir \u00e0 cisailler et \u00e0 faciliter la dispersion des bulles et des \u00e9ventuels additifs dans l'aluminium fondu. Afin de maintenir la surface de la masse fondue relativement statique, il est \u00e9galement n\u00e9cessaire d\u2019\u00e9viter l\u2019effet des courants de Foucault provoqu\u00e9 par la rotation du rotor. L\u2019effet des courants de Foucault tend \u00e0 provoquer des fissures superficielles, un m\u00e9lange des mat\u00e9riaux pr\u00e9sents dans les scories avec des parties de l\u2019aluminium fondu, et entrave souvent l\u2019\u00e9limination des gaz ind\u00e9sirables et des inclusions.<\/p>","protected":false},"excerpt":{"rendered":"<p>The degasser system uses the rotor in the stator to remove the gas from the molten aluminum. Molten aluminum degasser system usually uses one or&hellip;<\/p>","protected":false},"author":1,"featured_media":11597,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[13000,1241,4313],"class_list":["post-11596","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-degassing-unit","tag-degasser-system","tag-degassing-in-molten-aluminum","tag-metal-degassing"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Degasser System for Molten Aluminum -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Molten aluminum degasser system uses one or more rotating rotor devices to inject inert gas. 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