Method of treating pyrite bearing polymetallic raw material

Details Method of treating pyrite bearing polymetallic raw material Method of treating pyrite bearing polymetallic raw material

C - Chemistry, Metallurgy

22

B

53/368

C22B 1/02 (2006.01) B03C 1/00 (2006.01)

Patent

CA 1142367

ABSTRACT OF THE DISCLOSURE A method comprises heating the material to be treated without access of air at 2 temperature of 700 to 800°C for a period of 1-2 hours, and then subjecting this material to subsequent magnetic separations. It is advisable that the furnace walls surrounding the material under treatment be heated to a temperature which is 100°C to 200°C higher than the boiling temperature of the material volatile components Upon completion of the heating operation, the material being treated is cooled at a rate of 2 to 4 deg. per minute, whereafter iron are removed therefrom by means of magnetic separation, the intensity of magnetic field ranging from 1000 to 2000 oersted, and then copper sulphides are separated, with the field intensity rang- ing from 4500 to 6000 oersted.

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