Method for upgrading of silicon-containing residues obtained...

Details Method for upgrading of silicon-containing residues obtained... Method for upgrading of silicon-containing residues obtained...

C - Chemistry, Metallurgy

01

B

C01B 33/037 (2006.01) C07F 7/16 (2006.01)

Patent

CA 2162041

The present invention relates to a method for upgrading silicon-containing solid residues obtained after leaching of copper from copper-containing residues from direct synthesis of organochlorosilanes. Solid residue, optionally together with an oxidation agent, is supplied to a smelting furnace where the residues are melted and form a molten metallic phase substantially containing silicon and a calcium silicate slag and tapping of the molten metallic phase and an inert slag from the smelting furnace.

Procédé de valorisation de résidus solides renfermant du silicium et résultant de l'extraction par lixiviation du cuivre compris dans les résidus renfermant du cuivre produits par la synthèse directe d'organochlorosilanes. On introduit les résidus solides, éventuellement associés à un agent oxydant, dans un four de fusion où l'on fond les résidus pour former une phase métallique en fusion renfermant sensiblement du silicium, et des scories renfermant du silicate de calcium, puis on soutire à partir du four de fusion la phase métallique en fusion et des scories inertes.

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