{"id":5616,"date":"2020-10-15T08:12:47","date_gmt":"2020-10-15T08:12:47","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=5616"},"modified":"2020-10-15T08:12:47","modified_gmt":"2020-10-15T08:12:47","slug":"purification-of-aluminium","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/purification-of-aluminium\/","title":{"rendered":"Purification de l'aluminium"},"content":{"rendered":"<p>La purification de l'aluminium consiste principalement en un d\u00e9gazage et une \u00e9limination des scories ; c'est pourquoi une s\u00e9rie de technologies de purification de pointe sont utilis\u00e9es dans le four de fusion, telles que l'injection de poudre d'azote pour le d\u00e9gazage et l'\u00e9limination des scories lors de l'affinage, le d\u00e9gazage en continu \u00e0 l'azote ou \u00e0 l'argon, ainsi qu'au gaz mixte azote-chlore, et <a href=\"http:\/\/www.alalloycasting.com\/fr\/ceramic-foam-filter-pal\/\">filtre en mousse c\u00e9ramique<\/a> filtration. Purifier l'aluminium fondu, garantir la qualit\u00e9 de celui-ci et \u00e9viter les r\u00e9clamations et les litiges li\u00e9s \u00e0 une puret\u00e9 insuffisante de la part des clients intervenant en aval de la cha\u00eene de transformation.<\/p>\n<p>Les inclusions non m\u00e9talliques et les gaz pr\u00e9sents dans la masse fondue (principalement de l'H\u2082) constituent les principaux facteurs qui influent sur le processus de coul\u00e9e et la qualit\u00e9 des lingots. Les alliages d'aluminium ont une forte tendance \u00e0 s'oxyder et \u00e0 s'impr\u00e9gner de gaz, et ils sont en contact direct avec les gaz du four ou l'atmosph\u00e8re ext\u00e9rieure pendant le processus de fusion. Lors de la fusion et du transfert de l\u2019aluminium fondu, des gaz et des inclusions se forment dans la masse fondue en raison de l\u2019absorption de gaz et de l\u2019oxydation, ce qui r\u00e9duit la puret\u00e9 de l\u2019aluminium fondu. 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. Le contr\u00f4le efficace des inclusions oxyd\u00e9es dans le bain de fusion est devenu un objectif commun poursuivi par la m\u00e9tallurgie, la fonderie et la transformation des mat\u00e9riaux.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-5617\" src=\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/10\/Purification-of-Aluminium-1.jpg\" alt=\"Purification de l&#039;aluminium\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Purification-of-Aluminium-1.jpg 500w, https:\/\/www.alalloycasting.com\/wp-content\/uploads\/2020\/10\/Purification-of-Aluminium-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/p>\n<p>La purification de l'aluminium s'effectue par affinage par injection de poudre d'azote dans le four de fusion, <a href=\"http:\/\/www.alalloycasting.com\/fr\/online-aluminum-degassing-system\/\">unit\u00e9 de d\u00e9gazage en ligne<\/a>, ainsi que le syst\u00e8me de filtration CFF. Le dispositif de d\u00e9gazage \u00e0 double rotor AdTech pr\u00e9sente une grande efficacit\u00e9 pour \u00e9liminer les gaz, les inclusions et certains \u00e9l\u00e9ments nocifs pr\u00e9sents dans la masse d'aluminium fondu ; il permet d'obtenir un r\u00e9sultat satisfaisant en mati\u00e8re d'\u00e9limination de l'hydrog\u00e8ne et de garantir la qualit\u00e9 interne du lingot. Le syst\u00e8me de filtration adopte une filtration monocouche et en deux \u00e9tapes en fonction du d\u00e9bit d\u2019aluminium fondu par unit\u00e9 de quantit\u00e9 de la plate-forme de coul\u00e9e. En production, il passe \u00e0 une filtration double couche et double \u00e9tape selon les exigences du client afin de r\u00e9pondre aux exigences de filtration des clients haut de gamme. Le filtre en mousse c\u00e9ramique est entour\u00e9 d\u2019un joint d\u2019\u00e9tanch\u00e9it\u00e9 qui agit au niveau du point de contact entre la plaque filtrante et le bo\u00eetier du filtre, afin d\u2019emp\u00eacher l\u2019aluminium en fusion de s\u2019\u00e9chapper par ce point de contact. Notre plaque filtrante en mousse c\u00e9ramique utilise trois types de joints d\u2019\u00e9tanch\u00e9it\u00e9 diff\u00e9rents : \u00e0 bord en papier fibreux, \u00e0 bord en coton fibreux et \u00e0 bord en coton expans\u00e9.<\/p>","protected":false},"excerpt":{"rendered":"<p>Purification of aluminium is mainly degassing and slag removal, so a series of advanced purification technologies are used in the smelting furnace, such as using&hellip;<\/p>","protected":false},"author":1,"featured_media":5618,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-5616","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>Purification of Aluminium | Online Degassing and Filtering<\/title>\n<meta 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