{"id":6235,"date":"2020-11-05T09:18:47","date_gmt":"2020-11-05T09:18:47","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6235"},"modified":"2020-11-05T09:18:47","modified_gmt":"2020-11-05T09:18:47","slug":"purification-of-aluminum-melt","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/purification-of-aluminum-melt\/","title":{"rendered":"Purification de l'aluminium fondu"},"content":{"rendered":"

La qualit\u00e9 de l'aluminium fondu est tr\u00e8s importante, car elle influe consid\u00e9rablement sur les performances des \u00e9tapes de transformation ult\u00e9rieures et sur la qualit\u00e9 du produit final ; c'est pourquoi la purification de l'aluminium fondu constitue une \u00e9tape essentielle.<\/p>\n

Les causes de la pollution par l'aluminium sont nombreuses. D'une part, lorsqu\u2019il est expos\u00e9 \u00e0 l\u2019atmosph\u00e8re dans le four \u00e0 l\u2019\u00e9tat fondu ou semi-fondu pendant le processus de fusion, l\u2019aluminium s\u2019oxyde facilement et r\u00e9agit avec la vapeur d\u2019eau pour absorber de l\u2019argon ; il forme \u00e9galement facilement diverses formes de scories non m\u00e9talliques, telles que des fragments de rev\u00eatement du four. En ce qui concerne les chlorures, les carbures, etc. pr\u00e9sents dans le fondant, ainsi que les grosses particules interm\u00e9talliques, etc., une partie des d\u00e9chets constituant la charge apporte des impuret\u00e9s non aluminiques au cours du processus de circulation. Comme ces d\u00e9chets proviennent des r\u00e9sidus de production, des d\u00e9chets d\u2019usine et des d\u00e9chets externes g\u00e9n\u00e9r\u00e9s \u00e0 chaque \u00e9tape du processus de fabrication, leur provenance est vari\u00e9e, leur composition est complexe et leur qualit\u00e9 est m\u00e9diocre. Les impuret\u00e9s susmentionn\u00e9es provoquent souvent l\u2019apparition de bulles et d\u2019inclusions dans la billette coul\u00e9e, ce qui affecte gravement la puret\u00e9 du m\u00e9tal en fusion, affectant ainsi davantage les performances de transformation, les propri\u00e9t\u00e9s m\u00e9caniques, la r\u00e9sistance \u00e0 la corrosion et la qualit\u00e9 esth\u00e9tique du produit.<\/p>\n

Le filtre c\u00e9ramique en mousse d'alumine<\/a> La plaque permet d'\u00e9liminer efficacement diverses inclusions pr\u00e9sentes dans le bain d'aluminium, d'une finesse de l'ordre du microm\u00e8tre, de sorte que le bain d'aluminium se transforme en un \u00e9coulement laminaire r\u00e9gulier, ce qui facilite le remplissage. Elle pr\u00e9sente une structure unique de porphyrite-corindon, une bonne r\u00e9sistance m\u00e9canique et une bonne stabilit\u00e9 chimique, ainsi qu'une r\u00e9sistance sup\u00e9rieure \u00e0 l'\u00e9rosion par le bain d'aluminium. La taille des alv\u00e9oles et le taux de per\u00e7age, strictement contr\u00f4l\u00e9s, permettent d\u2019obtenir un effet de filtration stable. La plaque filtrante en c\u00e9ramique alv\u00e9ol\u00e9e est entour\u00e9e d\u2019un rev\u00eatement d\u2019\u00e9tanch\u00e9it\u00e9 en fibre c\u00e9ramique, ce qui contribue \u00e0 sceller la plaque filtrante dans le caisson de filtration et garantit l\u2019absence de fuite lat\u00e9rale de m\u00e9tal en fusion. Ce produit est principalement utilis\u00e9 dans le processus de purification de la production d\u2019aluminium et d\u2019alliages d\u2019aluminium, mais aussi dans divers milieux de s\u00e9paration gaz-solide et liquide-solide, comme supports de catalyseurs, br\u00fbleurs, pour l\u2019absorption acoustique et la protection de l\u2019environnement.<\/p>\n

\"Purification<\/p>\n

Les plaques filtrantes en mousse c\u00e9ramique destin\u00e9es \u00e0 la purification de l'aluminium fondu ont apport\u00e9 d'\u00e9normes avantages \u00e0 la production de feuilles minces et \u00e0 ses d\u00e9riv\u00e9s (tels que les \u00e9bauches de canettes et les plaques d'impression PS). Pour les fabricants de profil\u00e9s en alliage d'aluminium, les avantages sont \u00e9vidents :<\/p>\n

1. Am\u00e9liorer la productivit\u00e9 de l'extrusion : l'utilisation de plaques filtrantes pour purifier les \u00e9bauches d'extrusion en alliage 6063 permet d'augmenter la vitesse d'extrusion d'environ 20% et d'am\u00e9liorer la productivit\u00e9 de pr\u00e8s de 15%.
\n2. Prolonger la dur\u00e9e de vie du moule et r\u00e9duire le nombre de r\u00e9parations n\u00e9cessaires.
\n3. R\u00e9duction de la force d'extrusion : lorsque le bain fondu de l'alliage 6063 est purifi\u00e9 \u00e0 l'aide d'une plaque filtrante, on constate que la force d'extrusion est r\u00e9duite de 3% par rapport \u00e0 celle obtenue sans filtration.
\n4. Am\u00e9liorer consid\u00e9rablement la qualit\u00e9 de surface des profil\u00e9s en aluminium.<\/p>","protected":false},"excerpt":{"rendered":"

The quality of the aluminum melt is very important, it affects the subsequent processing performance and the quality of the final product to a large…<\/p>","protected":false},"author":1,"featured_media":6238,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-6235","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nPurification of Aluminum Melt by Alumina Ceramic Foam Filter<\/title>\n<meta name=\"description\" content=\"The ceramic foam filter plates for the purification of aluminum melt has brought huge benefits to the strip foil and its products.\" \/>\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\/purification-of-aluminum-melt\/\" \/>\n<meta property=\"og:locale\" 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