{"id":7166,"date":"2020-12-24T02:12:39","date_gmt":"2020-12-24T02:12:39","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=7166"},"modified":"2020-12-24T02:12:39","modified_gmt":"2020-12-24T02:12:39","slug":"ceramic-filter-molten-aluminum-filtration","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/ceramic-filter-molten-aluminum-filtration\/","title":{"rendered":"Filtre en c\u00e9ramique pour la filtration de l'aluminium fondu"},"content":{"rendered":"<p>Le filtre en mousse c\u00e9ramique augmente la r\u00e9sistance \u00e0 l'\u00e9coulement de l'aluminium fondu, prolonge le temps de s\u00e9jour moyen de celui-ci et r\u00e9duit la fraction volumique de la zone morte du r\u00e9partiteur. Les filtres en mousse c\u00e9ramique peuvent am\u00e9liorer consid\u00e9rablement le taux d'\u00e9limination des inclusions de petite taille et compenser en partie la baisse du taux d'\u00e9limination des inclusions due \u00e0 l'augmentation de la densit\u00e9.<\/p>\n<p>Au cours du processus de coul\u00e9e continue, en raison de la d\u00e9sulfuration, de la d\u00e9soxydation et de l'alliage de l'aluminium fondu, de l'interaction entre l'aluminium fondu et les scories, ainsi que de la perte par fusion et de l'\u00e9caillage des mat\u00e9riaux r\u00e9fractaires tels que les rev\u00eatements de four, divers oxydes, nitrures et sulfures sont g\u00e9n\u00e9r\u00e9s. Inclusions non m\u00e9talliques. Ces inclusions non m\u00e9talliques affectent gravement la r\u00e9sistance, la t\u00e9nacit\u00e9 et la r\u00e9sistance \u00e0 la fatigue des produits en aluminium, et r\u00e9duisent la fiabilit\u00e9 des produits.<\/p>\n<p>En tant que derni\u00e8re \u00e9tape de l'\u00e9limination des inclusions avant la coul\u00e9e continue d'aluminium fondu, le r\u00e9partiteur joue un r\u00f4le d\u00e9terminant dans la puret\u00e9 de l'aluminium fondu. Afin d\u2019am\u00e9liorer le taux d\u2019\u00e9limination des inclusions, des dispositifs de contr\u00f4le de l\u2019\u00e9coulement, tels que des suppresseurs de turbulence et des d\u00e9versoirs, sont g\u00e9n\u00e9ralement install\u00e9s dans le r\u00e9partiteur pour optimiser le champ d\u2019\u00e9coulement et la r\u00e9partition de la temp\u00e9rature de l\u2019aluminium fondu, favorisant ainsi l\u2019\u00e9limination par flottation des inclusions. Cependant, les dispositifs de contr\u00f4le de l\u2019\u00e9coulement classiques ne permettent d\u2019\u00e9liminer que les inclusions de grande taille. Pour les inclusions dont la taille est inf\u00e9rieure \u00e0 50 \u03bcm, l\u2019efficacit\u00e9 de l\u2019\u00e9limination par flottation n\u2019est pas optimale en raison d\u2019une flottabilit\u00e9 limit\u00e9e.<\/p>\n<p><a href=\"http:\/\/www.alalloycasting.com\/fr\/foam-ceramicceramic-foam-filter-filtration\/\">Filtration par filtre en mousse c\u00e9ramique<\/a> Cette technologie constitue depuis quelques ann\u00e9es un axe de recherche majeur dans le domaine de l'\u00e9limination des inclusions. Elle consiste \u00e0 utiliser des mat\u00e9riaux r\u00e9fractaires microporeux pour mettre au point un filtre c\u00e9ramique poreux pr\u00e9sentant une grande stabilit\u00e9 chimique et une forte capacit\u00e9 d'adsorption, puis \u00e0 l'installer dans le r\u00e9partiteur. Lorsque l\u2019aluminium liquide s\u2019\u00e9coule \u00e0 travers le filtre c\u00e9ramique, les alv\u00e9oles du filtre modifient la structure du champ d\u2019\u00e9coulement de l\u2019aluminium, for\u00e7ant ainsi les inclusions \u00e0 se s\u00e9parer de l\u2019aluminium fondu et \u00e0 se d\u00e9placer vers la paroi des alv\u00e9oles, avant d\u2019\u00eatre adsorb\u00e9es et \u00e9limin\u00e9es par le filtre c\u00e9ramique. Ce processus d\u2019\u00e9limination repose principalement sur l\u2019adsorption des inclusions par les mat\u00e9riaux r\u00e9fractaires microporeux, et la flottabilit\u00e9 des inclusions n\u2019est pas beaucoup affect\u00e9e. Par cons\u00e9quent, l\u2019efficacit\u00e9 de l\u2019\u00e9limination des inclusions de petite taille peut \u00eatre consid\u00e9rablement am\u00e9lior\u00e9e.<\/p>","protected":false},"excerpt":{"rendered":"<p>The ceramic foam filter increases the flow resistance of the molten aluminum, prolongs the average residence time of the molten aluminum, and reduces the volume&hellip;<\/p>","protected":false},"author":1,"featured_media":7167,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[],"class_list":["post-7166","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ceramic Filter Molten Aluminum Filtration, Molten Metal Filter<\/title>\n<meta name=\"description\" content=\"Ceramic foam filter can significantly improve the removal rate of small-size inclusions. CFF filtration technology is a research hotspot.\" \/>\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\/ceramic-filter-molten-aluminum-filtration\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ceramic Filter Molten Aluminum Filtration, Molten Metal Filter\" \/>\n<meta property=\"og:description\" content=\"Ceramic foam filter can significantly improve the removal rate of small-size inclusions. 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