{"id":9950,"date":"2021-08-18T03:49:24","date_gmt":"2021-08-18T03:49:24","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9950"},"modified":"2021-08-18T03:49:24","modified_gmt":"2021-08-18T03:49:24","slug":"slagging-and-degassing-methods","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/slagging-and-degassing-methods\/","title":{"rendered":"M\u00e9thodes de scoriage et de d\u00e9gazage"},"content":{"rendered":"

Les m\u00e9thodes de scorification et de d\u00e9gazage utilis\u00e9es dans le processus de fusion de l'aluminium et des alliages d'aluminium peuvent g\u00e9n\u00e9ralement \u00eatre class\u00e9es en deux grandes cat\u00e9gories : les m\u00e9thodes de recouvrement par fondant et de protection par gaz inerte ; les m\u00e9thodes par r\u00e9action chimique et par adsorption, \u00e0 savoir les m\u00e9thodes d'affinage par fondant et par gaz ; et les m\u00e9thodes sans adsorption, qui comprennent principalement les m\u00e9thodes sous vide et par filtration CFF. De plus, en fonction des diff\u00e9rents milieux utilis\u00e9s pour l'affinage et la purification, on peut distinguer la m\u00e9thode d'affinage par fondant solide et la m\u00e9thode d'affinage par gaz. Selon les diff\u00e9rents proc\u00e9d\u00e9s, on peut distinguer l'affinage en four, l'affinage en ligne hors du four et Filtration CFF<\/a> purification.<\/p>\n

Les diff\u00e9rentes mesures de purification actuellement utilis\u00e9es ne permettent pas d'atteindre un taux d'\u00e9limination des scories et des gaz de 100%. Dans le processus de fusion consistant \u00e0 utiliser de l'aluminium liquide \u00e9lectrolytique pour produire directement des billettes d'aluminium destin\u00e9es \u00e0 la transformation, il est n\u00e9cessaire d'effectuer trois op\u00e9rations d'affinage et deux op\u00e9rations de filtration.<\/p>\n

Le raffinage est prot\u00e9g\u00e9 par un agent de recouvrement, \u00e0 savoir un agent de raffinage solide non toxique \u00e0 base de sel de nitrate ou de fluorure contenant de la cryolite, ou encore de la poudre pulv\u00e9ris\u00e9e \u00e0 l'azote. agent de raffinage<\/a> pour l'affinage et la purification visant \u00e0 \u00e9liminer les inclusions non m\u00e9talliques pr\u00e9sentes dans la masse fondue, et une partie de celles-ci peut \u00eatre \u00e9limin\u00e9e en m\u00eame temps que les gaz et les m\u00e9taux alcalins.<\/p>\n

Les m\u00e9thodes de traitement par scories et de d\u00e9gazage permettent de r\u00e9duire consid\u00e9rablement la teneur en scories du four de fusion ainsi que la charge de travail de ce dernier, ce qui favorise la fusion de l'alliage et am\u00e9liore la puret\u00e9 et la propret\u00e9 initiales de la masse fondue.<\/p>\n

Dans le processus de fusion, la purification de la masse fondue dans le four s'effectue principalement, lors de l'affinage dans le four de m\u00e9lange, par la m\u00e9thode de purification par fondant, la m\u00e9thode de purification par pulv\u00e9risation de gaz inerte et la m\u00e9thode de purification par gaz actif (m\u00e9lange d'azote et de chlore). Les deux derni\u00e8res m\u00e9thodes sont principalement utilis\u00e9es pour l'affinage dans des fours statiques, mais dans la production en continu de bandes coul\u00e9es-lamin\u00e9es, il convient d'utiliser la m\u00e9thode de purification par m\u00e9lange d'azote et de chlore afin d'emp\u00eacher le flux solide et les scories de p\u00e9n\u00e9trer dans la masse fondue.<\/p>","protected":false},"excerpt":{"rendered":"

The slagging and degassing methods in the smelting process of aluminum and aluminum alloys can generally be divided into flux covering and inert gas protection…<\/p>","protected":false},"author":1,"featured_media":9951,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[12369,7383,1775,12370,833,12368],"class_list":["post-9950","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminum-smelting","tag-cff-filtration","tag-furnace-refining","tag-online-refining","tag-refining-agent","tag-slagging-and-degassing"],"yoast_head":"\nSlagging and Degassing Methods in Aluminum Smelting Process<\/title>\n<meta name=\"description\" content=\"The slagging and degassing methods in the smelting process of aluminum include flux covering and inert gas protection methods...\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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