{"id":10545,"date":"2021-10-12T08:46:48","date_gmt":"2021-10-12T08:46:48","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=10545"},"modified":"2021-10-12T08:46:48","modified_gmt":"2021-10-12T08:46:48","slug":"melting-furnace-fluxes","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/fr\/melting-furnace-fluxes\/","title":{"rendered":"Flux pour fours de fusion"},"content":{"rendered":"

Les fondants pour fours de fusion se pr\u00e9sentent sous forme de compos\u00e9s salins, utilis\u00e9s pour purifier les mat\u00e9riaux pendant la fusion et emp\u00eacher toute oxydation ult\u00e9rieure.<\/p>\n

La qualit\u00e9 des billettes d'aluminium moul\u00e9es d\u00e9pend en grande partie de la puret\u00e9 du mat\u00e9riau.<\/p>\n

L'aluminium peut \u00eatre trait\u00e9 de deux mani\u00e8res. L'aluminium brut est r\u00e9cup\u00e9r\u00e9 \u00e0 partir de l'extraction de la bauxite ou par recyclage. \u00c9tant donn\u00e9 que la production d'aluminium recycl\u00e9 ne n\u00e9cessite que 5% de l'\u00e9nergie requise pour produire de l'aluminium primaire, la possibilit\u00e9 de r\u00e9cup\u00e9rer l'aluminium constitue un avantage consid\u00e9rable. L'aluminium recycl\u00e9 est souvent appel\u00e9 \u00ab aluminium de recyclage \u00bb.<\/p>\n

La fonderie produit des billettes d'aluminium recycl\u00e9 \u00e0 partir de d\u00e9chets. Le produit fini est ensuite achemin\u00e9 vers l'atelier d'extrusion de l'entreprise afin d'\u00eatre transform\u00e9 en profil\u00e9s. Lors de l'extrusion, certaines parties du profil\u00e9 peuvent pr\u00e9senter des d\u00e9fauts et ne pas r\u00e9pondre aux caract\u00e9ristiques ou \u00e0 la forme requises. Ces pi\u00e8ces sont alors renvoy\u00e9es pour \u00eatre refondues.<\/p>\n

Les billettes \u00e9tant destin\u00e9es \u00e0 l'extrusion, elles doivent r\u00e9pondre \u00e0 certaines normes de qualit\u00e9. Elles doivent pr\u00e9senter une ductilit\u00e9 suffisante pour ne pas endommager la presse et ses composants. Si la qualit\u00e9 de la billette est insuffisante, l'outil d'extrusion risque d'\u00eatre endommag\u00e9, ce qui entra\u00eenera une interruption de la production. De plus, une \u00e9bauche de mauvaise qualit\u00e9 peut \u00e9galement provoquer des rayures \u00e0 la surface du profil\u00e9 lors de l'extrusion. La billette doit \u00eatre exempte d'inclusions et d'impuret\u00e9s non m\u00e9talliques afin d'\u00e9viter de tels incidents et de garantir son bon \u00e9tat.<\/p>\n

\"Flux<\/p>\n

La meilleure fa\u00e7on de garantir une puret\u00e9 maximale du mat\u00e9riau, sans inclusions ni impuret\u00e9s, consiste \u00e0 les \u00e9liminer de la masse fondue d\u00e8s la phase de production. On peut utiliser des fondants pour four de fusion afin d'\u00e9liminer les inclusions de la masse d'aluminium fondu. Le flux de raffinage<\/a> Il sert \u00e9galement \u00e0 prot\u00e9ger la masse fondue contre toute oxydation suppl\u00e9mentaire en formant une fine couche \u00e0 la surface, entre la masse fondue et l'oxyg\u00e8ne. Le flux a \u00e9galement pour fonction de r\u00e9cup\u00e9rer l'aluminium entra\u00een\u00e9 dans la phase d'\u00e9cume et d'obtenir ainsi un meilleur rendement en aluminium.<\/p>","protected":false},"excerpt":{"rendered":"

Melting furnace fluxes exist in the form of salt compounds, which are used to purify materials during melting and prevent further oxidation. 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