Method of selectively bringing into solution the non-ferrous...

Details Method of selectively bringing into solution the non-ferrous... Method of selectively bringing into solution the non-ferrous...

C - Chemistry, Metallurgy

22

B

53/371

C22B 3/00 (2006.01) C22B 3/04 (2006.01) C22B 3/10 (2006.01) C22B 9/02 (2006.01)

Patent

CA 1061572

ABSTRACT OF THE DISCLOSURE The specification discloses a method for enabling copper, lead, zinc and associated precious metals contained in sulphurized ores and concentrates to be brought into solution selectively with regard to iron and sulphur. The specification discloses a method for selectively bringing into solution said metals which enables all of these ores to be treated and which optionally uses a preliminary flotation stage, this method leading to the provision of an aqueous solution which contains the non-ferrous metals included in the initial product, with- out the pyrites and the sulphur being attacked to any appreciable extent, whereas the iron associated with ores other than pyrites is separated in the form of goethite which can be readily filtered. The specification achieves this means of a method of the kind described above, in which the initial product is subjected to lixiviation by means of an aqueous cupric chloride solution and the cupric chloride is regener- ated in situ by means of a regeneration agent and air at atmospheric pressure.

226960

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