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1. (WO2001038233) ELECTROCHEMICAL COVER FOR INHIBITING DIFFUSION/INFILTRATION OF OXYGEN INTO REACTIVE SULPHIDE MATERIALS

Pub. No.:    WO/2001/038233    International Application No.:    PCT/CA2000/001385
Publication Date: Fri Jun 01 01:59:59 CEST 2001 International Filing Date: Sat Nov 25 00:59:59 CET 2000
IPC: B09B 1/00
C02F 1/467
Applicants: ENPAR TECHNOLOGIES INC.
SHELP, Gene, Sidney
BROUSSEAU, Rejean, Joseph, Henry
Inventors: SHELP, Gene, Sidney
BROUSSEAU, Rejean, Joseph, Henry
Title: ELECTROCHEMICAL COVER FOR INHIBITING DIFFUSION/INFILTRATION OF OXYGEN INTO REACTIVE SULPHIDE MATERIALS
Abstract:
Acidity in water leaching from a mass of sulphide tailings is prevented by de-oxygenating the water prior to entering the mass. A cover comprising an electrolytic cell, either galvanic or impressed-current, gives rise to a cathode reaction in which the redox voltage of the water drops to 003 volts or less. The cover can be thinner, and much less expensive, than an equally-effective non-reactive cover. The electrolyte is water contained in water-retaining soil, or a depth of water, lying over the cathode. The cathode is steel mesh, or a layer of graphite, spread over the whole mass of tailings.