{"id":6698,"date":"2020-11-26T02:33:37","date_gmt":"2020-11-26T02:33:37","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=6698"},"modified":"2020-11-26T02:33:37","modified_gmt":"2020-11-26T02:33:37","slug":"online-purification-of-molten-aluminum","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/online-purification-of-molten-aluminum\/","title":{"rendered":"Purification en continu de l'aluminium fondu"},"content":{"rendered":"

Bien que l'aluminium fondu subisse une s\u00e9rie de traitements de purification dans le four, le degr\u00e9 de purification reste limit\u00e9, et une certaine quantit\u00e9 de gaz et d'inclusions subsiste dans la masse fondue apr\u00e8s l'affinage. Afin de produire des barres rondes en aluminium de haute qualit\u00e9, la masse fondue d'aluminium doit \u00eatre purifi\u00e9e autant que possible. C'est pourquoi un dispositif de purification en ligne de l'aluminium fondu<\/a>\u00a0est install\u00e9 entre le four de fusion et la poche de coul\u00e9e de la cha\u00eene de production ; il comprend un syst\u00e8me de filtration et d'affinage continu des gaz.<\/p>\n

Purification en continu de l'aluminium fondu<\/strong><\/p>\n

Le gaz continu dispositif de d\u00e9gazage<\/a> utilise de l'azote (N\u2082) de haute puret\u00e9 pour le faire tourner et le pulv\u00e9riser dans le bain d'aluminium fondu via un rotor en graphite. L'aluminium fondu s'\u00e9coule par le haut du caisson de d\u00e9gazage et descend en spirale sous l'action de l'agitation provoqu\u00e9e par la rotation du rotor en graphite. L\u2019azote pulv\u00e9ris\u00e9 par le rotor en graphite est fragment\u00e9 en fines bulles sous l\u2019effet de la force de frottement exerc\u00e9e par la buse et le bain d\u2019aluminium, puis se disperse uniform\u00e9ment dans le bain d\u2019aluminium. Au cours de leur remont\u00e9e, ces fines bulles se m\u00e9langent compl\u00e8tement au bain d\u2019aluminium en aval afin d\u2019extraire l\u2019hydrog\u00e8ne et les inclusions et de purifier le bain. La temp\u00e9rature de d\u00e9gazage en ligne de l\u2019aluminium fondu doit \u00eatre comprise entre 720 et 730 \u2103.<\/p>\n

\"Purification<\/p>\n

Le dispositif de filtration \u00e0 plaques<\/a> Il est principalement compos\u00e9 d'un bo\u00eetier de filtration CFF et d'une plaque filtrante en mousse c\u00e9ramique. La plaque filtrante est immerg\u00e9e et plac\u00e9e \u00e0 l'horizontale. Le rev\u00eatement int\u00e9rieur du bo\u00eetier de filtration est constitu\u00e9 de silicium fondu fritt\u00e9 \u00e0 haute densit\u00e9, et un mat\u00e9riau anti-infiltration d'aluminium y est ajout\u00e9 afin d'am\u00e9liorer la dur\u00e9e de vie du bo\u00eetier. Par ailleurs, il pr\u00e9sente un faible coefficient de dilatation thermique et une meilleure r\u00e9sistance aux chocs thermiques. La fonction principale de la plaque filtrante est d\u2019absorber et d\u2019intercepter les inclusions de grande taille pr\u00e9sentes dans la masse fondue, ainsi que les inclusions fines en suspension gr\u00e2ce au gaz adsorb\u00e9. La plaque filtrante en mousse c\u00e9ramique emp\u00eache les impuret\u00e9s de p\u00e9n\u00e9trer dans la poche de coul\u00e9e.<\/p>","protected":false},"excerpt":{"rendered":"

Although molten aluminum undergoes a series of purification treatments in the furnace, the degree of purification is limited, and a certain amount of gas and…<\/p>","protected":false},"author":1,"featured_media":6699,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[],"class_list":["post-6698","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"yoast_head":"\nOnline Purification of Molten Aluminum Filtration and Refining<\/title>\n<meta name=\"description\" content=\"Online purification\u00a0of molten aluminum includes filtration and continuous gas refining, so as to produce high-quality round aluminum rods.\" \/>\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\/online-purification-of-molten-aluminum\/\" 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