{"id":3223,"date":"2020-07-31T10:10:17","date_gmt":"2020-07-31T10:10:17","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=3223"},"modified":"2020-10-19T08:44:05","modified_gmt":"2020-10-19T08:44:05","slug":"liquid-aluminum-purification","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/liquid-aluminum-purification\/","title":{"rendered":"Purification de l'aluminium liquide"},"content":{"rendered":"

La purification de l'aluminium liquide constitue une \u00e9tape importante dans la coul\u00e9e des alliages d'aluminium. Avec le d\u00e9veloppement de la science et de la technologie modernes et les exigences de l'industrie contemporaine, la science des mat\u00e9riaux, qui figure parmi les trois piliers de l'industrie du XXIe si\u00e8cle, \u00e9volue vers des mat\u00e9riaux pr\u00e9sentant une r\u00e9sistance sp\u00e9cifique \u00e9lev\u00e9e, une grande r\u00e9sistance m\u00e9canique et une bonne t\u00e9nacit\u00e9. Depuis longtemps, les alliages d'aluminium moul\u00e9s sont largement utilis\u00e9s dans l'industrie en raison de leur faible co\u00fbt, de leur l\u00e9g\u00e8ret\u00e9 et de leurs performances fiables.<\/p>\n

Cependant, en raison du retrait de solidification des alliages d'aluminium moul\u00e9s et de la forte solubilit\u00e9 de l'hydrog\u00e8ne, ceux-ci contiennent in\u00e9vitablement un certain nombre de d\u00e9fauts, tels que des vides, des oxydes et des inclusions non m\u00e9talliques. Ces d\u00e9fauts ont une grande influence sur les propri\u00e9t\u00e9s m\u00e9caniques des composants. Par exemple, une fraction volumique de 1% entra\u00eenera une fatigue du 50%.<\/p>\n

\"Purification<\/p>\n

Purification de l'aluminium liquide<\/h2>\n

Une fois que l'aluminium liquide est \u00e9vacu\u00e9 du four, il est d\u00e9gaz\u00e9 en ligne, filtr\u00e9, puis achemin\u00e9 vers le moule pour d\u00e9marrer la coul\u00e9e continue. Le d\u00e9gazage en ligne est r\u00e9alis\u00e9 \u00e0 l'aide d'un dispositif de d\u00e9gazage rotatif. Le processus de purification repose sur le principe de la purification par adsorption. Le gaz d'affinage est insuffl\u00e9 \u00e0 travers le rotor. Gr\u00e2ce \u00e0 la buse rotative, de petites bulles sont r\u00e9parties uniform\u00e9ment et entrent en contact total avec la masse fondue dans la chambre de r\u00e9action afin de la purifier. Le gaz d'affinage peut \u00eatre de l'azote ou un m\u00e9lange d'azote et de chlore.<\/p>\n

La principale m\u00e9thode de retrait des scories par filtration consiste \u00e0 purifier la masse fondue en tirant parti de l'effet de r\u00e9tention du milieu filtrant, de la force de frottement ou de la pression du fluide, afin de provoquer la s\u00e9dimentation ou la r\u00e9tention des impuret\u00e9s. La ligne de production utilise un syst\u00e8me CFF \u00e0 deux \u00e9tages filtre en c\u00e9ramique alv\u00e9ol\u00e9e<\/a> plaque, et le bo\u00eetier de filtration est \u00e9quip\u00e9 de deux jeux de plaques filtrantes parall\u00e8les. La plaque filtrante est une plaque composite en mousse c\u00e9ramique \u00e0 double couche de 30\/50 ppi. La porosit\u00e9 de la plaque filtrante sup\u00e9rieure est de 30 ppi, et celle de la plaque filtrante inf\u00e9rieure est de 50 ppi. Le filtre en mousse c\u00e9ramique CFF permet d\u2019\u00e9liminer efficacement les inclusions de scories dont le diam\u00e8tre est sup\u00e9rieur \u00e0 20 \u00b5m, et son rendement de filtration peut atteindre 751 TP3T.<\/p>","protected":false},"excerpt":{"rendered":"

Liquid Aluminum Purification becomes one important step for casting aluminum alloy. With the development of modern science and technology and the demand of modern industry,…<\/p>","protected":false},"author":1,"featured_media":3230,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[1776],"class_list":["post-3223","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-liquid-aluminum-purification"],"yoast_head":"\nLiquid Aluminum Purification - CFF Foam Ceramic Fltering<\/title>\n<meta name=\"description\" content=\"Liquid aluminum purification becomes one important step. 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