{"id":10098,"date":"2021-08-27T06:51:23","date_gmt":"2021-08-27T06:51:23","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10098"},"modified":"2021-08-26T06:51:39","modified_gmt":"2021-08-26T06:51:39","slug":"aluminum-alloy-degassing-purification","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-alloy-degassing-purification\/","title":{"rendered":"D\u00e9gazage et purification des alliages d'aluminium"},"content":{"rendered":"<p>Le d\u00e9gazage et la purification des alliages d'aluminium constituent une \u00e9tape fondamentale dans la production de ces alliages. Ce processus permet de r\u00e9duire la teneur en hydrog\u00e8ne pr\u00e9sent dans le m\u00e9tal fondu, d'am\u00e9liorer la puret\u00e9 du m\u00e9tal en \u00e9liminant les impuret\u00e9s et de diminuer la teneur en m\u00e9taux alcalins dans l'alliage final, afin d'obtenir un aluminium liquide plus pur.<\/p>\n<p>La purification par d\u00e9gazage des alliages d'aluminium s'effectue en injectant un m\u00e9lange gazeux dans le m\u00e9tal en fusion. La surface de contact entre les bulles et le m\u00e9tal en fusion provoque une r\u00e9action physique et chimique qui permet de r\u00e9duire la capture des bulles d'hydrog\u00e8ne fusible et diffusible ainsi que des particules d'impuret\u00e9s solides.<\/p>\n<p>Il existe deux m\u00e9thodes de d\u00e9gazage et de purification des alliages d'aluminium. La premi\u00e8re est la purification et le d\u00e9gazage statiques, qui s'effectuent dans le four de fusion. La seconde est la purification et le d\u00e9gazage en ligne, qui font appel \u00e0 un ensemble d'\u00e9quipements sp\u00e9cialement con\u00e7us, install\u00e9s entre le four de fusion et la machine de coul\u00e9e.<\/p>\n<p>La purification de l'aluminium fondu dans le four est tr\u00e8s limit\u00e9e. Pour am\u00e9liorer encore la puret\u00e9 de la masse fondue d'alliage d'aluminium, il est plus important de recourir \u00e0 un traitement de purification en continu hors du four afin d'\u00e9liminer plus efficacement les gaz nocifs et les inclusions non m\u00e9talliques pr\u00e9sents dans la masse fondue d'alliage d'aluminium et de produire des alliages d'aluminium moul\u00e9s de haute qualit\u00e9.<\/p>\n<p>L'\u00e9limination de l'hydrog\u00e8ne peut \u00eatre r\u00e9alis\u00e9e en dispersant un gaz neutre (Ar ou N) dans un <a href=\"http:\/\/www.alalloycasting.com\/fr\/online-degassing-system\/\">syst\u00e8me de d\u00e9gazage en ligne<\/a> et au contact de l'aluminium fondu. On obtient la meilleure efficacit\u00e9 d'\u00e9limination de l'hydrog\u00e8ne en augmentant la surface d'\u00e9change entre l'hydrog\u00e8ne dissous et l'aluminium fondu, c'est-\u00e0-dire en r\u00e9duisant autant que possible la taille des bulles.<\/p>\n<p>Les fonctions du syst\u00e8me de purification et de d\u00e9gazage en ligne sont les suivantes :<\/p>\n<p>(1) Le contact est plus efficace et il est possible de r\u00e9duire la quantit\u00e9 de gaz r\u00e9actif n\u00e9cessaire.<br \/>\n(2) R\u00e9duire la pollution atmosph\u00e9rique.<br \/>\n(3) Acc\u00e9l\u00e9rer la solidification du m\u00e9tal et r\u00e9duire la teneur en oxyg\u00e8ne du produit final.<br \/>\n(4) R\u00e9duire la quantit\u00e9 de scories d'aluminium et att\u00e9nuer davantage la turbulence \u00e0 la surface du m\u00e9tal.<\/p>","protected":false},"excerpt":{"rendered":"<p>Aluminum alloy degassing purification is a basic step in the production of aluminum alloy. It can reduce the hydrogen melted in the solid metal, improve&hellip;<\/p>","protected":false},"author":1,"featured_media":10099,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12511,642],"class_list":["post-10098","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminum-alloy-degassing-purification","tag-online-degassing-system"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Aluminum Alloy Degassing Purification, Online Degassing System<\/title>\n<meta name=\"description\" content=\"Aluminum alloy degassing purification can reduce the hydrogen melted in the solid metal, improve the purity of the metal.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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