{"id":4697,"date":"2020-09-11T14:15:27","date_gmt":"2020-09-11T14:15:27","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4697"},"modified":"2020-09-11T14:15:27","modified_gmt":"2020-09-11T14:15:27","slug":"aluminium-liquid-filtration","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminium-liquid-filtration\/","title":{"rendered":"Filtration de l'aluminium liquide"},"content":{"rendered":"

La filtration de l'aluminium en fusion est la m\u00e9thode la plus efficace et la plus fiable pour \u00e9liminer les inclusions non m\u00e9talliques pr\u00e9sentes dans l'aluminium en fusion. Il existe de nombreux types de filtration. La plus simple est la filtration \u00e0 l'aide d'un tissu en fibre de verre. Les meilleurs r\u00e9sultats en mati\u00e8re de filtration de l'aluminium en fusion sont obtenus avec des tubes filtrants et des plaques filtrantes en mousse c\u00e9ramique.<\/p>\n

Le principal avantage du filtre en mousse c\u00e9ramique<\/a> L'avantage de ce syst\u00e8me r\u00e9side dans le fait que les inclusions de scories g\u00e9n\u00e9r\u00e9es lors du processus d'injection \u00e0 l'ext\u00e9rieur du four peuvent \u00eatre efficacement \u00e9limin\u00e9es gr\u00e2ce \u00e0 la plaque filtrante, ce qui permet d'\u00e9liminer les petites inclusions de l'ordre du micron pr\u00e9sentes dans l'aluminium liquide, ce qui est impossible avec un proc\u00e9d\u00e9 conventionnel. Parall\u00e8lement, gr\u00e2ce \u00e0 l\u2019\u00e9limination des petites inclusions par la plaque filtrante, le nombre effectif de noyaux cristallins dans l\u2019aluminium liquide est r\u00e9duit, ce qui permet \u00e0 l\u2019aluminium liquide de nucl\u00e9er et de cro\u00eetre dans des conditions de sous-refroidissement important, raccourcissant ainsi le temps de solidification et affinant la structure. R\u00e9duire la teneur en hydrog\u00e8ne de l\u2019aluminium liquide. Les atomes d\u2019hydrog\u00e8ne peuvent \u00eatre adsorb\u00e9s sur certaines inclusions d\u2019oxydation, et ces derni\u00e8res peuvent devenir le noyau de la croissance des bulles ; ainsi, le gaz pr\u00e9sent sur les inclusions peut \u00eatre \u00e9limin\u00e9 simultan\u00e9ment ; les \u00e9l\u00e9ments ind\u00e9sirables (sodium et potassium) pr\u00e9sents dans l\u2019aluminium liquide peuvent \u00eatre \u00e9limin\u00e9s par adsorption. Par cons\u00e9quent, en fonction des diff\u00e9rentes exigences des clients ou des conditions environnementales du site, le choix d\u2019une plaque filtrante adapt\u00e9e permet de garantir la qualit\u00e9 du produit et de contr\u00f4ler efficacement les inclusions de scories.<\/p>\n

\"Filtration<\/p>\n

Les exigences de base relatives aux filtres en c\u00e9ramique alv\u00e9ol\u00e9e sont les suivantes :<\/p>\n

    \n
  1. Il pr\u00e9sente une r\u00e9sistance suffisante \u00e0 la temp\u00e9rature ambiante et aux temp\u00e9ratures \u00e9lev\u00e9es pour \u00e9viter tout dommage et toute chute de scories pendant le transport, l'installation et l'utilisation.<\/li>\n
  2. Il pr\u00e9sente une grande stabilit\u00e9 chimique, ne r\u00e9agit pas avec l'aluminium fondu dans la plage de temp\u00e9ratures de fonctionnement et ne pr\u00e9sente aucun risque pour l'aluminium liquide ni pour l'environnement.<\/li>\n
  3. Il pr\u00e9sente un taux de per\u00e7age et une perm\u00e9abilit\u00e9 \u00e0 l'aluminium liquide suffisants pour garantir une filtration fluide en production.<\/li>\n
  4. Par cons\u00e9quent, la plaque filtrante doit pr\u00e9senter un faible coefficient de dilatation thermique et ne pas se fissurer lorsqu'elle est chauff\u00e9e.<\/li>\n
  5. Il n'est pas hygroscopique, pr\u00e9sente une faible densit\u00e9 et une faible capacit\u00e9 thermique sp\u00e9cifique, et ne n\u00e9cessite pas de pr\u00e9chauffage avant utilisation.<\/li>\n<\/ol>","protected":false},"excerpt":{"rendered":"

    Aluminium Liquid Filtration is the most effective and reliable method to remove non-metallic inclusions in aluminum melt. There are many kinds of filtration. The simplest…<\/p>","protected":false},"author":1,"featured_media":4698,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[],"class_list":["post-4697","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"yoast_head":"\nAluminium Liquid Filtration by Ceramic Foam Filter System<\/title>\n<meta name=\"description\" content=\"Aluminium Liquid Filtration by ceramic foam filter is the most effective method to remove non-metallic inclusions in aluminum melt.\" \/>\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\/aluminium-liquid-filtration\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Aluminium Liquid Filtration 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