{"id":5171,"date":"2020-09-25T09:28:02","date_gmt":"2020-09-25T09:28:02","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5171"},"modified":"2020-09-25T10:05:56","modified_gmt":"2020-09-25T10:05:56","slug":"secondary-aluminum-production","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/secondary-aluminum-production\/","title":{"rendered":"Production d'aluminium secondaire"},"content":{"rendered":"

La question centrale de la production d'aluminium recycl\u00e9 r\u00e9side dans la mani\u00e8re de transformer une telle diversit\u00e9 de mati\u00e8res premi\u00e8res complexes en lingots d'aluminium recycl\u00e9 conformes aux normes. La premi\u00e8re \u00e9tape du processus de production d'aluminium secondaire consiste \u00e0 trier et \u00e0 classer les d\u00e9chets et les d\u00e9chets divers d'aluminium.
\nPlus le tri est fin et plus la classification est pr\u00e9cise, plus il est facile de contr\u00f4ler la composition chimique de aluminium recycl\u00e9<\/a>.
\nLes d\u00e9chets d'aluminium comportent souvent de nombreux inclusions. Ces inclusions sont principalement des \u00e9l\u00e9ments non aluminiques, compos\u00e9s d'acier ou d'alliages de cuivre. Si elles ne sont pas retir\u00e9es \u00e0 temps au cours du processus de fusion, elles entra\u00eeneront l'ajout d'\u00e9l\u00e9ments ind\u00e9sirables dans la composition de l'aluminium secondaire (tels que le Fe, le Cu, etc.).
\nPar cons\u00e9quent, au d\u00e9but du processus de fusion de l'aluminium de r\u00e9cup\u00e9ration, c'est-\u00e0-dire lorsque l'aluminium de r\u00e9cup\u00e9ration vient d'\u00eatre fondu, il est indispensable de proc\u00e9der \u00e0 l'\u00e9limination des inclusions (processus commun\u00e9ment appel\u00e9 \u00ab processus de d\u00e9capage \u00bb).<\/p>\n

\"Production<\/p>\n

Production d'aluminium secondaire<\/h2>\n

Retirez les inserts des chutes d'aluminium ; plus cette op\u00e9ration est effectu\u00e9e rapidement et proprement, plus il est facile de contr\u00f4ler la composition chimique de l'aluminium recycl\u00e9.
\nLa temp\u00e9rature de la masse fondue ne doit pas \u00eatre trop \u00e9lev\u00e9e lors du repassage, car l'\u00e9l\u00e9vation de temp\u00e9rature entra\u00eenerait la dissolution des \u00e9l\u00e9ments Fe et Cu pr\u00e9sents dans l'insert dans l'aluminium fondu.<\/p>\n

Les d\u00e9chets d'aluminium collect\u00e9s \u00e0 divers endroits pr\u00e9sentent in\u00e9vitablement des salissures en surface pour diverses raisons, et certains sont fortement rouill\u00e9s. Lors de la fusion, ces salissures et ces surfaces rouill\u00e9es p\u00e9n\u00e8trent dans le bain de fusion et forment des phases de scories et des inclusions d'oxydation, ce qui nuit gravement \u00e0 la qualit\u00e9 m\u00e9tallurgique de l'aluminium secondaire. .
\nL'\u00e9limination de ces phases de scories et de ces inclusions d'oxyde constitue \u00e9galement l'une des \u00e9tapes importantes du processus de fusion de l'aluminium secondaire.
\nOn recourt \u00e0 une purification en plusieurs \u00e9tapes : on proc\u00e8de d'abord \u00e0 une purification grossi\u00e8re, puis on ajuste la composition avant d'effectuer une purification secondaire fine des terres rares ; enfin, on injecte un gaz inerte afin de renforcer encore l'effet d'affinage, ce qui permet d'\u00e9liminer efficacement les inclusions pr\u00e9sentes dans la masse d'aluminium fondu.<\/p>","protected":false},"excerpt":{"rendered":"

How to prepare such a variety of complex raw materials into qualified recycled aluminum ingots is the core issue of recycled aluminum production. The first…<\/p>","protected":false},"author":1,"featured_media":5173,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5171","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nSecondary Aluminum Production by Recycled Aluminum<\/title>\n<meta name=\"description\" content=\"The first step of the secondary aluminum production process is the sorting and classification process of waste and miscellaneous aluminum.\" \/>\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\/secondary-aluminum-production\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Secondary Aluminum 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