Leaching Sulfide Minerals by Oxidative Electrolysis in Membrane Cells.
Proc Int symp on Electrochem in Min &met Processing 1984 84-10:374-390
Sulfide minerals present a significant resource for strategic, precious, and base metals. The federal Bureau of Mines is investigating an oxidative-electrolysis procedure for leaching sulfide minerals. Leaching of sulfide minerals was performed by electrolysis of sodium chloride solution in cells equipped with ion- selective membranes to separate the anodic and cathodic reactions. The metal sulfide minerals were oxidized by chlorine produced at the anode and converted to soluble metal ions, sulfate ions, and elemental sulfur. Sodium hydroxide was simultaneously generated at the cathode. The objectives of this paper are to discuss the important requirements for developing a membrane electrolysis cell, to review past and current results on the oxidative-electrolysis leaching of sulfide minerals or materials, and to demonstrate the feasibility of incorporating the leaching technique into a viable hydrometallurgical process.
Proc. Int.symp. on Electrochem. in Min.&met. Processing, V. 84-10, 1984, PP. 374-390