Hydrometalurgical production of zinc oxide from roasted zinc...

Details Hydrometalurgical production of zinc oxide from roasted zinc... Hydrometalurgical production of zinc oxide from roasted zinc...

C - Chemistry, Metallurgy

01

G

23/266, 53/325

C01G 9/02 (2006.01) C22B 3/12 (2006.01) C22B 19/34 (2006.01)

Patent

CA 1317088

ABSTRACT OF THE DISCLOSURE A process is provided for obtaining high quality high surface area zinc oxide from a roasted zinc sulphide concentrate by leaching with an ammoniacal ammonium carbonate solution. The process utilizes optional preliminary oxidation and water leaching steps to remove soluble impurities and an optional aqueous sulphur dioxide leaching step to selectively remove readily soluble zinc oxide. The process also includes an optional reduced pressure calcining step to produce zinc oxide with further increased surface area.

543867

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