{"id":6266,"date":"2020-11-06T06:31:59","date_gmt":"2020-11-06T06:31:59","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6266"},"modified":"2020-11-06T06:31:59","modified_gmt":"2020-11-06T06:31:59","slug":"aluminum-purification-methods","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-purification-methods\/","title":{"rendered":"M\u00e9thodes de purification de l'aluminium"},"content":{"rendered":"

\u00c9tant donn\u00e9 que les inclusions et l'hydrog\u00e8ne pr\u00e9sents dans l'aluminium fondu vont de pair et interagissent entre eux, les diff\u00e9rentes m\u00e9thodes bas\u00e9es sur l'\u00e9limination de l'hydrog\u00e8ne et la purification pr\u00e9sentent \u00e9galement des degr\u00e9s variables d'\u00e9limination des impuret\u00e9s. Cependant, la pratique montre que l'efficacit\u00e9 de ce type d'\u00e9limination des impuret\u00e9s est tr\u00e8s limit\u00e9e. \u00c0 l'heure actuelle, il n'existe pas beaucoup de m\u00e9thodes de purification de l'aluminium permettant d'\u00e9liminer efficacement les impuret\u00e9s. Ces m\u00e9thodes ne font pas l'objet d'une recherche aussi approfondie que celle consacr\u00e9e \u00e0 la purification par \u00e9limination de l'hydrog\u00e8ne ; elles comprennent principalement la m\u00e9thode au flux, la m\u00e9thode au flux \u00e9lectrique et la m\u00e9thode de filtration.<\/p>\n

M\u00e9thodes de purification de l'aluminium<\/strong><\/p>\n

L'essence m\u00eame de la m\u00e9thode du flux<\/a> est que, lorsque l'aluminium fondu est purifi\u00e9 par le flux, les inclusions migrent spontan\u00e9ment de la masse fondue vers le flux en raison de la diff\u00e9rence de temp\u00e9rature de transition entre les phases en contact. Son effet d'\u00e9limination des impuret\u00e9s est directement li\u00e9 aux propri\u00e9t\u00e9s physiques et chimiques du flux lui-m\u00eame. Par ailleurs, les conditions du processus de purification n\u2019ont pas encore \u00e9t\u00e9 d\u00e9termin\u00e9es dans le cadre d\u2019un programme \u00e0 grande \u00e9chelle, notamment la quantit\u00e9 de fondant, les conditions de contact entre le fondant et le bain de fusion, ainsi que la temp\u00e9rature.<\/p>\n

La m\u00e9thode du flux \u00e9lectrique est une technique de purification mise au point par l'ancienne Union sovi\u00e9tique d\u00e8s les ann\u00e9es 1970. Elle consiste essentiellement \u00e0 \u00e9liminer en continu les impuret\u00e9s de l'aluminium fondu sous l'action d'un champ \u00e9lectrique continu ou alternatif.<\/p>\n

\"M\u00e9thodes<\/p>\n

La purification par filtration consiste principalement \u00e0 faire s'\u00e9couler l'aluminium liquide \u00e0 travers un milieu donn\u00e9, lequel retient les inclusions selon un certain m\u00e9canisme, tout en \u00e9liminant l'hydrog\u00e8ne adsorb\u00e9 sur les impuret\u00e9s, afin d'atteindre l'objectif de purification. Il s'agit de l'une des m\u00e9thodes efficaces pour \u00e9liminer les inclusions. En fonction du type de filtre, on distingue trois cat\u00e9gories : les filtres \u00e0 mailles, les filtres granulaires et les filtres en c\u00e9ramique poreuse, parmi lesquels les filtres en c\u00e9ramique poreuse se subdivisent en c\u00e9ramique rigide (microporeuse) et filtre en c\u00e9ramique alv\u00e9ol\u00e9e<\/a>. En fonction du m\u00e9canisme de filtration, on distingue le m\u00e9canisme de filtration par g\u00e2teau de filtration et le m\u00e9canisme de filtration en profondeur. Les c\u00e9ramiques poreuses rel\u00e8vent de la filtration en profondeur.<\/p>","protected":false},"excerpt":{"rendered":"

Since inclusions and hydrogen in molten aluminum are accompanied and interacted with each other, various methods based on hydrogen removal and purification also have different…<\/p>","protected":false},"author":1,"featured_media":6268,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-6266","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nAluminum Purification Methods - Flux and Filtration Method<\/title>\n<meta name=\"description\" content=\"In order to effectively remove impurities, there are not many aluminum purification methods, mainly including flux and filtration method.\" \/>\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\/aluminum-purification-methods\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Aluminum Purification Methods - 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