d\u00e9gazeur rotatif<\/a>\u00a0Le principe de l'affinage est le suivant : le rotor en rotation divise l'azote (ou l'argon) inject\u00e9 dans la masse d'aluminium fondu en un grand nombre de bulles dispers\u00e9es et les r\u00e9partit dans le m\u00e9tal en fusion. Les bulles absorbent l'hydrog\u00e8ne pr\u00e9sent dans la masse en fusion et capturent les scories oxyd\u00e9es gr\u00e2ce \u00e0 la diff\u00e9rence de pression partielle des gaz et au principe d'adsorption en surface. \u00c0 mesure que les bulles remontent, elles sont extraites de la surface du bain fondu afin de purifier celui-ci. Comme les bulles sont fines et dispers\u00e9es, elles se m\u00e9langent uniform\u00e9ment au bain en rotation, puis d\u00e9crivent une spirale, remontent lentement \u00e0 la surface et restent longtemps en contact avec le bain. Il n\u2019y a donc pas de flux gazeux g\u00e9n\u00e9r\u00e9 par une remont\u00e9e continue en ligne droite, ce qui permet d\u2019\u00e9liminer l\u2019hydrog\u00e8ne nocif pr\u00e9sent dans le bain d\u2019aluminium fondu et d\u2019am\u00e9liorer consid\u00e9rablement l\u2019efficacit\u00e9 de la purification.<\/p>\n![\"Proc\u00e9d\u00e9](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2020\/07\/Purification-Process-of-Liquid-Aluminum-1.jpg\")
<\/p>\n
Proc\u00e9d\u00e9 de purification de l'aluminium liquide<\/h2>\n
Il existe sur le march\u00e9 de nombreux \u00e9quipements de moulage sous pression et de fonderie destin\u00e9s \u00e0 la fusion des alliages d'aluminium, notamment les fours de fusion centralis\u00e9s, les fours \u00e0 creuset, les fours \u00e0 bain, les fours de maintien \u00e9lectriques, etc. Par cons\u00e9quent, les \u00e9quipements de d\u00e9gazage peuvent \u00e9galement \u00eatre personnalis\u00e9s en fonction des \u00e9quipements de fusion des alliages d'aluminium ; ils peuvent ainsi prendre la forme de d\u00e9gazeurs d'affinage mobiles, fixes ou suspendus.<\/p>\n
Il existe trois \u00e9tats de l'hydrog\u00e8ne dissous dans l'aluminium fondu (\u00e9tat atomique, \u00e9tat mol\u00e9culaire et \u00e9tat de compos\u00e9, parmi lesquels seule la mol\u00e9cule d'hydrog\u00e8ne peut former des pores ; la mol\u00e9cule d\u2019hydrog\u00e8ne et l\u2019atome d\u2019hydrog\u00e8ne se trouvent en \u00e9quilibre dynamique, et les mol\u00e9cules d\u2019hydrog\u00e8ne et les hydrures se s\u00e9parent imm\u00e9diatement sous diff\u00e9rentes formes au cours du processus de cristallisation du m\u00e9tal (les atomes d\u2019hydrog\u00e8ne se dispersent vers la surface du m\u00e9tal puis quittent l\u2019\u00e9tat d\u2019adsorption, tandis que les mol\u00e9cules d\u2019hydrog\u00e8ne s\u2019\u00e9vaporent pour \u00e9liminer l\u2019hydrog\u00e8ne du m\u00e9tal liquide sous forme de bulles) Lorsque certaines de ces bulles ne parviennent pas \u00e0 remonter jusqu\u2019\u00e0 l\u2019interface, elles restent dans le m\u00e9tal fondu et provoquent des soufflures dans la pi\u00e8ce moul\u00e9e.<\/p>","protected":false},"excerpt":{"rendered":"
Purification process of liquid aluminum alloy is the main means to improve the comprehensive properties of aluminum alloy. In the purification process, the purification gas…<\/p>","protected":false},"author":1,"featured_media":3301,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[1761],"class_list":["post-3226","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo","tag-purification-process-of-liquid-aluminum"],"yoast_head":"\n
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