{"id":11184,"date":"2021-11-13T08:16:22","date_gmt":"2021-11-13T08:16:22","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=11184"},"modified":"2021-11-12T08:20:13","modified_gmt":"2021-11-12T08:20:13","slug":"fluxes-for-purifying-aluminium","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/fluxes-for-purifying-aluminium\/","title":{"rendered":"Flux destin\u00e9s \u00e0 la purification de l'aluminium"},"content":{"rendered":"<p>L'\u00e9limination des impuret\u00e9s \u00e0 l'aide de fondants constitue une m\u00e9thode importante pour la purification de l'aluminium fondu. \u00c0 l'heure actuelle, de nombreux types de fondants ont \u00e9t\u00e9 mis au point et sont utilis\u00e9s tant en France qu'\u00e0 l'\u00e9tranger. Outre les fondants dont l'objectif principal est d'\u00e9liminer les gaz et les impuret\u00e9s, il existe \u00e9galement d'autres types de fondants, tels que les agents de recouvrement et les agents de nettoyage des scories. En fonction de l'objectif de purification, les agents de purification de l'aluminium fondu sont class\u00e9s en trois cat\u00e9gories : les agents de purification des gaz, les fondants d'\u00e9limination des impuret\u00e9s et les fondants de purification.<\/p>\n<p>Au cours du processus de fusion de l\u2019aluminium et de ses alliages, des polluants tels que des inclusions d\u2019oxyde (AlO\u2083) et de l\u2019hydrog\u00e8ne affectent la puret\u00e9 de la masse fondue, entra\u00eenant l\u2019apparition de d\u00e9fauts tels que des bulles, des pores et des inclusions libres dans le lingot, ce qui a une incidence directe sur les propri\u00e9t\u00e9s intrins\u00e8ques de l\u2019aluminium et des alliages d\u2019aluminium. Par cons\u00e9quent, l'\u00e9limination des gaz et des inclusions pr\u00e9sents dans l'aluminium fondu ainsi que l'am\u00e9lioration de la puret\u00e9 de la masse fondue d'aluminium constituent un sujet de recherche important pour la purification de l'aluminium et des alliages d'aluminium fondus ; il s'agit \u00e9galement d'un probl\u00e8me technique urgent \u00e0 r\u00e9soudre dans le domaine du recyclage de l'aluminium.<\/p>\n<p>En r\u00e8gle g\u00e9n\u00e9rale, le bain d'alliage d'aluminium contient entre 0,4 et 0,8 ml\/100 g d'Al d'hydrog\u00e8ne. Une fois le bain d'aluminium d\u00e9gaz\u00e9, la teneur en hydrog\u00e8ne correspondant au niveau avanc\u00e9 national est de 0,15 ml\/100 g d'Al, tandis que le niveau avanc\u00e9 international est de 0,10 ml\/100 g d'Al. Le <a href=\"http:\/\/www.alalloycasting.com\/fr\/granular-flux\/\">flux granulaire<\/a> peut permettre de ramener la teneur en hydrog\u00e8ne de la masse fondue d\u2019aluminium en dessous de 0,08 mL\/100 g d\u2019Al. Dans l\u2019aluminium pur industriel, apr\u00e8s \u00e9limination des impuret\u00e9s, la teneur en inclusions est g\u00e9n\u00e9ralement sup\u00e9rieure \u00e0 0,1%, et la taille de la plupart des inclusions est sup\u00e9rieure \u00e0 10 \u00b5m. Au niveau international en mati\u00e8re d'\u00e9limination des inclusions, la teneur en inclusions dans la masse fondue est de 0,021 TP3T, et la taille des inclusions est inf\u00e9rieure \u00e0 7 \u00b5m. Les fondants utilis\u00e9s pour la purification de l'aluminium fondu permettent d'\u00e9liminer efficacement les inclusions sup\u00e9rieures \u00e0 7 \u00b5m.<\/p>\n<p>Gr\u00e2ce aux progr\u00e8s de la science et de la technologie, le domaine de la fusion et de la purification de l'aluminium a connu une \u00e9volution rapide, et sa teneur en hydrog\u00e8ne a baiss\u00e9 pour atteindre environ 0,10 ml\/100 g d'Al. La th\u00e9orie de la purification de l\u2019aluminium fondu a \u00e9galement \u00e9volu\u00e9 : de la th\u00e9orie de la flottation par bulles, on est pass\u00e9 au principe de proc\u00e9d\u00e9 consistant \u00e0 \u00e9liminer d\u2019abord les impuret\u00e9s, puis \u00e0 d\u00e9gazer, avant de proc\u00e9der \u00e0 une protection par recouvrement. Le processus d\u2019\u00e9limination de l\u2019hydrog\u00e8ne de l\u2019aluminium fondu consiste \u00e0 \u00e9liminer directement l\u2019hydrog\u00e8ne atomique par diffusion des atomes \u00e0 l\u2019int\u00e9rieur de l\u2019aluminium fondu ; il doit \u00e9galement y avoir, dans l\u2019aluminium fondu, des atomes charg\u00e9s d\u2019\u00e9liminer l\u2019hydrog\u00e8ne et de d\u00e9soxyg\u00e9ner le m\u00e9tal.<\/p>","protected":false},"excerpt":{"rendered":"<p>Impurity removal by fluxes is an important method for purifying aluminium melt. At present, there are many types of fluxes developed and used at home&hellip;<\/p>","protected":false},"author":1,"featured_media":11186,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-11184","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fluxes for Purifying Aluminium -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Impurity removal by fluxes is an important method for purifying aluminium melt. 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