Method for processing zinc silicate-containing zinc crude...

Details Method for processing zinc silicate-containing zinc crude... Method for processing zinc silicate-containing zinc crude...

C - Chemistry, Metallurgy

22

B

C22B 3/08 (2006.01) C22B 19/00 (2006.01) C22B 19/28 (2006.01)

Patent

CA 2214611

A method for processing a zinc silicate-containing zinc crude material, characterized by maintaining a sulfuric acid-acidified solution in the following conditions in extracting zinc from a zinc silicate-containing zinc crude material in a sulfuric acid- acidified leaching tank: liquid temperature (t) : t >= 75°C pH : 1.5 <= pH <= 3.0 Si0 2 concentration : Si0 2 <= 5.0 g/l wherein said Si0 2 concentration is the concentration of ionic silica [Si(OH)4] and of colloidal silica [(Si0 2)n] in said solution.

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