{"id":8193,"date":"2021-03-31T02:23:31","date_gmt":"2021-03-31T02:23:31","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=8193"},"modified":"2021-03-31T02:23:31","modified_gmt":"2021-03-31T02:23:31","slug":"aluminum-alloy-purification","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-alloy-purification\/","title":{"rendered":"Purification des alliages d'aluminium"},"content":{"rendered":"

La purification de l'alliage d'aluminium repose sur un proc\u00e9d\u00e9 d'affinage par injection de poudre d'azote dans le four de fusion, ainsi que sur un syst\u00e8me international de pointe de d\u00e9gazage et de filtration. Le syst\u00e8me de d\u00e9gazage en continu utilise la technologie d'affinage par rotor \u00e0 gaz, qui offre un rendement de d\u00e9gazage \u00e9lev\u00e9 et permet d'obtenir un effet satisfaisant d'\u00e9limination de l'hydrog\u00e8ne, garantissant ainsi la qualit\u00e9 interne du lingot.<\/p>\n

Les impuret\u00e9s non m\u00e9talliques et les gaz (principalement de l'H\u2082) pr\u00e9sents dans la masse fondue constituent les principaux facteurs qui influent sur le processus de coul\u00e9e et la qualit\u00e9 du lingot. Les alliages d'aluminium ont une forte tendance \u00e0 s'oxyder et \u00e0 s'impr\u00e9gner de gaz. Au cours du processus de fusion, ils sont en contact direct avec les gaz du four ou l'atmosph\u00e8re ext\u00e9rieure. Au cours de la fusion et du transfert de l\u2019aluminium fondu, des gaz et des inclusions se forment dans le bain de fusion en raison de l\u2019absorption de gaz et de l\u2019oxydation, ce qui r\u00e9duit la puret\u00e9 de l\u2019aluminium liquide. Les inclusions et les gaz pr\u00e9sents dans le m\u00e9tal ont un impact significatif sur la r\u00e9sistance m\u00e9canique, la r\u00e9sistance \u00e0 la fatigue, la r\u00e9sistance \u00e0 la corrosion et la r\u00e9sistance \u00e0 la fissuration par corrosion sous contrainte des profil\u00e9s en alliage d\u2019aluminium.<\/p>\n

Le contr\u00f4le efficace des inclusions oxyd\u00e9es de la masse fondue afin d\u2019am\u00e9liorer la qualit\u00e9 interne des barres et des brames coul\u00e9es est devenu un objectif commun poursuivi par les secteurs de la m\u00e9tallurgie, de la fonderie et de la transformation des mat\u00e9riaux. Les usines d'aluminium peuvent recourir \u00e0 une s\u00e9rie de technologies avanc\u00e9es de purification des alliages d'aluminium, telles que l'affinage par injection de flux en poudre, le d\u00e9gazage en ligne et la filtration par mousse c\u00e9ramique dans le four de fusion. Cela permet de garantir la qualit\u00e9 de l'aluminium fondu et d'assurer la poursuite des op\u00e9rations de transformation en aval.<\/p>\n

\"Flux<\/p>\n

Au cours de la phase de fusion, une partie de l'hydrog\u00e8ne sera \u00e9limin\u00e9e en abaissant la temp\u00e9rature de la masse fondue et raffinage \u00e0 l'\u00e9tat fondu<\/a>, et la majeure partie de l'hydrog\u00e8ne sera \u00e9limin\u00e9e par des \u00e9quipements de raffinage en ligne.<\/p>\n

Le d\u00e9gazage en ligne est g\u00e9n\u00e9ralement r\u00e9alis\u00e9 \u00e0 l'aide d'un \u00e9quipement d\u00e9di\u00e9 au d\u00e9gazage en ligne. Lorsque l'\u00e9quipement de d\u00e9gazage fonctionne, une grande quantit\u00e9 de gaz inerte est \u00e9ject\u00e9e du rotor et se transforme en bulles extr\u00eamement fines sous l'action de la rotation \u00e0 grande vitesse du rotor ; celles-ci se dispersent dans l'espace int\u00e9rieur de la cuve de d\u00e9gazage, et l'hydrog\u00e8ne pr\u00e9sent dans la masse fondue est absorb\u00e9 par ces petites bulles, ce qui r\u00e9duit la teneur en hydrog\u00e8ne. De toute \u00e9vidence, plus l\u2019effet de dispersion des bulles est efficace, meilleur sera l\u2019effet de d\u00e9gazage.<\/p>\n

Le syst\u00e8me de filtration en ligne utilise plaques filtrantes en mousse c\u00e9ramique<\/a>. En production, conform\u00e9ment aux exigences des clients, on recourt \u00e0 une filtration en deux \u00e9tapes afin de r\u00e9pondre aux exigences de filtration des clients haut de gamme.<\/p>","protected":false},"excerpt":{"rendered":"

Aluminum alloy purification adopts smelting furnace nitrogen powder injection refining and international advanced degassing filtration system. The online degassing system adopts rotor gas refining technology,…<\/p>","protected":false},"author":1,"featured_media":8194,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-8193","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nAluminum Alloy Purification by advanced degassing filtration system<\/title>\n<meta name=\"description\" content=\"Aluminum alloy purification filtration system uses ceramic foam filter, two-stage filtration is used to meet the high-end customers.\" \/>\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\/aluminum-alloy-purification\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" 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