Recovery of metals from metal silicates

Details Recovery of metals from metal silicates Recovery of metals from metal silicates

C - Chemistry, Metallurgy

22

B

C22B 26/22 (2006.01) C22B 3/04 (2006.01) C22B 3/44 (2006.01) C22B 7/00 (2006.01)

Patent

CA 2340567

Disclosed herein is a process for recovering magnesium from an aggregate volume of magnesium silicate material, specifically asbestos tailings, comprising the steps of: a) contacting a first acidic leach solution with the material, in order for said first leach solution to travel from an entry region of said aggregate volume to an exit region thereof, in a manner sufficient to leach at least a portion of said magnesium from said material to form a silicate- bearing leach residue therein; b) collecting said first leach solution at said exit region while retaining substantially all of said leach residue in said aggregate volume; c) removing impurities from said first leach solution; and d) recovering at least a portion of said magnesium from said first leach solution.

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