Conversion of non-ferrous sulfides

Details Conversion of non-ferrous sulfides Conversion of non-ferrous sulfides

C - Chemistry, Metallurgy

22

B

C22B 15/06 (2006.01) C22B 5/12 (2006.01) C22B 23/00 (2006.01) C22B 23/02 (2006.01)

Patent

CA 2111612

The invention relates to the smelting or converting of particulate sulfide material, such as nickel or copper sulfide. A molten seed bath of smelted or converted material is provided in a reaction vessel. Particulate sulfide material is injected into a reaction vessel below the surface of the melt. Top blowing with an oxygen-containing gas generates heat and brings about the oxidation of the sulfides with a significant decrease in the amount of dust generated. Optional bottom stirring with a non-reactive gas such as nitrogen may further increase efficiency.

L'invention porte sur la fusion ou la conversion de sulfure particulaire, comme le sulfure de nickel ou de cuivre. Un bain de germe fondu, à base de matériau fondu ou converti, est préparé dans une cuve de réaction. Le sulfure particulaire est injecté dans la cuve de réaction en dessous de la surface du produit fondu. Le soufflage par le haut avec un gaz oxygéné produit de la chaleur et oxyde les sulfures, avec diminution significative de la quantité de poussières produites. L'agitation facultative au fond, avec un gaz non réactif, comme l'azote, peut améliorer encore davantage le rendement.

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