{"id":4711,"date":"2020-09-11T15:32:57","date_gmt":"2020-09-11T15:32:57","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=4711"},"modified":"2021-01-11T03:36:57","modified_gmt":"2021-01-11T03:36:57","slug":"refining-of-molten-aluminium","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/refining-of-molten-aluminium\/","title":{"rendered":"Affinage de l'aluminium fondu"},"content":{"rendered":"

L'affinage par adsorption de l'aluminium fondu d\u00e9signe le contact direct entre l'aluminium fondu et un adsorbant (tel que divers agents d'affinage gazeux, liquides et solides, ainsi que des m\u00e9dias filtrants en mousse c\u00e9ramique), de sorte que l'adsorbant et les inclusions non m\u00e9talliques gazeuses et solides pr\u00e9sentes dans la masse fondue subissent des interactions physico-chimiques, physiques ou m\u00e9caniques, dans le but d'assurer le d\u00e9gazage et l'\u00e9limination des scories. Le degr\u00e9 de d\u00e9gommage de la masse fondue d\u00e9pend des conditions de contact, c'est-\u00e0-dire de la surface de contact entre la masse fondue et l'adsorbant, de la dur\u00e9e de contact et de l'\u00e9tat de la surface de contact.<\/p>\n

L'affinage par adsorption de l'aluminium fondu comprend : l'affinage par soufflage, l'affinage aux sels de chlore, affinage par flux<\/a>, la filtration \u00e0 chaud, etc. En ce qui concerne le d\u00e9gazage, le m\u00e9canisme de d\u00e9gazage de l'affinage par adsorption repose principalement sur la loi de la pression partielle des gaz et sur le d\u00e9gazage des compos\u00e9s form\u00e9s avec l'hydrog\u00e8ne. Quant \u00e0 l'\u00e9limination des scories, elle repose principalement sur l'adsorption, la dissolution, la combinaison et la filtration. L'utilisation d'un agent d'affinage actif permet \u00e9galement d'\u00e9liminer les impuret\u00e9s m\u00e9talliques telles que le sodium, le calcium, le magn\u00e9sium et le lithium, qui sont plus r\u00e9actives que l'aluminium. L'affinage par adsorption est la m\u00e9thode d'affinage la plus r\u00e9pandue dans l'industrie de l'aluminium.<\/p>\n

\"Flux<\/p>\n

L'affinage sans adsorption de l'aluminium fondu est une m\u00e9thode qui consiste \u00e0 modifier l'\u00e9tat d'\u00e9quilibre du syst\u00e8me m\u00e9tal-gaz ou du syst\u00e8me m\u00e9tal-inclusions par une action physique, sans ajouter d'adsorbant dans la masse fondue, afin de s\u00e9parer les gaz et les inclusions solides non m\u00e9talliques de l'aluminium fondu. L'affinage sans adsorption permet d'affiner tous les bains d'aluminium fondu, et son efficacit\u00e9 d\u00e9pend des conditions externes de rupture de l'\u00e9quilibre ainsi que des caract\u00e9ristiques de mouvement du bain d'aluminium fondu contenant des inclusions et des gaz.<\/p>\n

L'affinage sans adsorption comprend : le traitement statique, le traitement sous vide, le traitement par ultrasons, le traitement de pr\u00e9-solidification, la s\u00e9paration \u00e9lectromagn\u00e9tique, etc. Par ailleurs, l'effet principal des hautes fr\u00e9quences sur le m\u00e9canisme d'adsorption et d'\u00e9limination des gaz dans les scories fondues r\u00e9side dans le m\u00e9canisme d'adsorption des gaz par hautes fr\u00e9quences et dans l'utilisation de la cavitation \u00e0 hautes fr\u00e9quences pour la purification des scories fondues.<\/p>","protected":false},"excerpt":{"rendered":"

Adsorption refining of molten aluminium refers to the direct contact between aluminum melt and adsorbent (such as various gas, liquid and solid refining agents and…<\/p>","protected":false},"author":1,"featured_media":4712,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[4685],"class_list":["post-4711","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-refining-of-molten-aluminium"],"yoast_head":"\nRefining of Molten Aluminium | Degassing Refining<\/title>\n<meta name=\"description\" content=\"Adsorption refining of molten aluminium refers to the direct contact between aluminum melt and adsorbent, such as refining agents.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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