{"id":9315,"date":"2021-06-25T03:34:35","date_gmt":"2021-06-25T03:34:35","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9315"},"modified":"2021-06-25T03:34:35","modified_gmt":"2021-06-25T03:34:35","slug":"aluminum-refining-fluxes","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/aluminum-refining-fluxes\/","title":{"rendered":"Flux utilis\u00e9s dans l'affinage de l'aluminium"},"content":{"rendered":"

Les flux composites de raffinage de l'aluminium d\u00e9signent un m\u00e9lange de sels obtenu par m\u00e9lange ou fusion de deux ou plusieurs sels simples. Il s'agit du type d'agent de raffinage le plus largement utilis\u00e9 dans l'industrie de l'aluminium. Il est possible de choisir diff\u00e9rents agents d'affinage en fonction de divers besoins, tels que les flux composites utilis\u00e9s comme agents de purification, agents de scorification, agents de recouvrement et agents d'\u00e9limination du magn\u00e9sium. Nous proposons ces flux sous deux formes : granul\u00e9s et poudre. Compar\u00e9s aux flux en poudre, les produits granul\u00e9s sont exempts de poussi\u00e8re et plus efficaces, et ne n\u00e9cessitent qu'un faible dosage.<\/p>\n

Dans les masses fondues d'aluminium et d'alliages d'aluminium, les flux d'affinage de l'aluminium sont des substances capables d'\u00e9liminer les gaz, les inclusions et les \u00e9l\u00e9ments ind\u00e9sirables de la masse fondue gr\u00e2ce \u00e0 des interactions physiques et chimiques. Parmi les agents d'affinage des alliages d'aluminium couramment utilis\u00e9s, on trouve, selon leurs fonctions, les agents de recouvrement, les agents de d\u00e9gazage, les agents d'affinage (\u00e9galement appel\u00e9s agents de purification composites), agent de scoriification<\/a> (\u00e9galement appel\u00e9 \u00ab s\u00e9parateur scories-aluminium \u00bb), agent de nettoyage de four, agent d'\u00e9limination du magn\u00e9sium et agent de d\u00e9gazage.<\/p>\n

Les agents de raffinage \u00e0 base de sels de chlorure couramment utilis\u00e9s se caract\u00e9risent g\u00e9n\u00e9ralement par une forte volatilit\u00e9, un point d'\u00e9bullition bas et une r\u00e9action violente pendant le raffinage. Cependant, les sels de chlorure sont g\u00e9n\u00e9ralement hygroscopiques, et le produit final de la r\u00e9action, le chlorure d'aluminium, pr\u00e9sente un certain degr\u00e9 de toxicit\u00e9 et pollue l'environnement. Certains sels de chlorure augmentent la teneur en impuret\u00e9s m\u00e9talliques, et leur utilisation est donc soumise \u00e0 des restrictions.<\/p>\n

\"\"<\/p>\n

Les exigences de base relatives aux fondants utilis\u00e9s pour l'affinage de l'aluminium sont les suivantes :<\/p>\n

\u2460Aucune r\u00e9action chimique nocive pour l'aluminium fondu ne se produit dans la plage de temp\u00e9ratures de fonctionnement.
\n\u2461 Il pr\u00e9sente de bonnes propri\u00e9t\u00e9s d'affinage, de recouvrement ou de formation de scories, ou offre les performances requises en mati\u00e8re d'\u00e9limination des impuret\u00e9s m\u00e9talliques.
\n\u2462Le point de fusion doit \u00eatre inf\u00e9rieur \u00e0 la temp\u00e9rature de fusion et pr\u00e9senter une bonne fluidit\u00e9 \u00e0 l'\u00e9tat liquide ; quel que soit le type de flux composite, celui-ci doit se s\u00e9parer facilement de l'aluminium fondu et ne pas adh\u00e9rer aux parois du four ni aux outils.
\n\u2463La densit\u00e9 doit \u00eatre inf\u00e9rieure \u00e0 celle de l'aluminium fondu \u00e0 la temp\u00e9rature de fonctionnement.
\n\u2464 S\u00e9chez soigneusement.
\n\u2465Des ressources suffisantes, un approvisionnement ais\u00e9 et des prix bas.<\/p>","protected":false},"excerpt":{"rendered":"

Composite Aluminum Refining Fluxes refer to a salt mixture formed by mixing or fusing two or more single salts. This is the most widely used…<\/p>","protected":false},"author":1,"featured_media":9316,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[],"class_list":["post-9315","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nAluminum Refining Fluxes for Smelter and Foundries<\/title>\n<meta name=\"description\" content=\"Composite Aluminum Refining Fluxes refer to a salt mixture formed by mixing or fusing. 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