{"id":12317,"date":"2022-01-18T06:27:39","date_gmt":"2022-01-18T06:27:39","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=12317"},"modified":"2022-01-18T06:27:39","modified_gmt":"2022-01-18T06:27:39","slug":"liquid-aluminum-degassing-device","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/liquid-aluminum-degassing-device\/","title":{"rendered":"Dispositif de d\u00e9gazage de l'aluminium liquide"},"content":{"rendered":"

Le dispositif de d\u00e9gazage de l'aluminium liquide comprend un corps de caisson, un couvercle recouvrant ce corps de caisson et un rotor. Le rotor s'\u00e9tend \u00e0 l'int\u00e9rieur du caisson en passant par le fond de celui-ci. L'extr\u00e9mit\u00e9 sup\u00e9rieure du rotor est reli\u00e9e de mani\u00e8re coaxiale au plateau tournant, et l'int\u00e9rieur du rotor et celui du plateau tournant sont creux et communiquent entre eux. La forme du plateau tournant peut varier, allant d'une structure traditionnelle en forme de disque \u00e0 une structure a\u00e9rodynamique \u00e0 t\u00eate arrondie.<\/p>\n

Les rotors et les plateaux tournants permettent de transformer le flux d'air ascendant traditionnel, quasi rectiligne, en plusieurs flux d'air ascendants en spirale, ce qui se traduit par une dispersion plus homog\u00e8ne des fines bulles d'air dans l'aluminium fondu et, par cons\u00e9quent, par un d\u00e9gazage am\u00e9lior\u00e9.<\/p>\n

Les essais exp\u00e9rimentaux montrent que les bulles g\u00e9n\u00e9r\u00e9es par le plateau tournant sont petites et r\u00e9parties de mani\u00e8re homog\u00e8ne, ce qui permet d'obtenir un d\u00e9gazage et une \u00e9limination des scories optimaux.<\/p>\n

Le plateau tournant est fabriqu\u00e9 en nitrure de silicium ou en graphite. La vitesse de rotation du plateau tournant peut \u00eatre modifi\u00e9e \u00e0 l'aide d'un moteur \u00e0 fr\u00e9quence variable, et elle peut \u00eatre r\u00e9gl\u00e9e dans une plage comprise entre 0 et 900 tr\/min afin de r\u00e9pondre aux besoins du processus.<\/p>\n

La cl\u00e9 du d\u00e9gazage de \u00c9quipements de d\u00e9gazage<\/a> c'est que le rotor permet de fragmenter les grosses bulles de gaz inerte en petites bulles et de les faire se disperser dans le m\u00e9tal en fusion.<\/p>\n

\"Dispositif<\/p>\n

En r\u00e9duisant le diam\u00e8tre des bulles, la surface expos\u00e9e du gaz inerte augmente consid\u00e9rablement, ce qui permet \u00e0 une plus grande partie de ce gaz d'entrer en contact avec l'hydrog\u00e8ne et les impuret\u00e9s pr\u00e9sents dans le m\u00e9tal en fusion ; l'hydrog\u00e8ne et les impuret\u00e9s sont ainsi \u00e9limin\u00e9s de l'aluminium en fusion \u00e0 mesure que les bulles remontent \u00e0 la surface.<\/p>\n

Le d\u00e9bit du gaz inerte introduit dans l'aluminium fondu peut \u00eatre r\u00e9gl\u00e9 en fonction du volume de m\u00e9tal liquide \u00e0 traiter, et la vitesse de rotation de la tige et du rotor peut \u00eatre ajust\u00e9e afin de g\u00e9n\u00e9rer des bulles de taille appropri\u00e9e pour faciliter la diffusion du gaz inerte.<\/p>\n

L'argon et l'azote peuvent tous deux \u00eatre utilis\u00e9s comme gaz inertes pour le d\u00e9gazage de l'aluminium fondu. La puret\u00e9 du gaz inerte doit \u00eatre sup\u00e9rieure \u00e0 99,99%.<\/p>\n

Le dispositif de d\u00e9gazage de l'aluminium liquide sert \u00e0 injecter un gaz inerte dans l'aluminium fondu afin d'\u00e9liminer l'hydrog\u00e8ne. De plus, le d\u00e9gazage est \u00e9galement consid\u00e9r\u00e9 comme un moyen tr\u00e8s efficace de faire remonter les impuret\u00e9s \u00e0 la surface.<\/p>\n

En raison de la pression de vapeur \u00e9lev\u00e9e de l'hydrog\u00e8ne, l'hydrog\u00e8ne dissous se diffuse dans le gaz pr\u00e9sent dans l'aluminium liquide inject\u00e9. Th\u00e9oriquement, lorsqu'une inclusion d'un diam\u00e8tre de 10 microns entre en contact avec une bulle, elle s'adsorbe sur celle-ci et remonte \u00e0 la surface du liquide.<\/p>","protected":false},"excerpt":{"rendered":"

Liquid Aluminum Degassing Device includes a box body, a box cover covering the box body and a rotor. The rotor extends into the box through…<\/p>","protected":false},"author":1,"featured_media":12318,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[18],"tags":[],"class_list":["post-12317","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-degassing-unit"],"yoast_head":"\nLiquid Aluminum Degassing Device -sales@alalloycasting.com<\/title>\n<meta name=\"description\" content=\"Liquid Aluminum Degassing Device includes a box body, a box cover covering the box body and a rotor. 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