Title: Extraction method of zinc from ores and concentrates
Application Number: 85107417 Application Date: 1985.10.05
Publication Number: 1000388 Publication Date: 1986.03.10
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: C25C1/16;C25C7/06
Applicant(s) Name: Dextec Metallurgical PTY. Ltd. Address:
Inventor(s) Name: Peter Kenneth Everett
Attorney & Agent: CAO HENGXING
Abstract:
    The present invention relates to recovering zinc from zinc bearing ore or concentrate(1) in an electrolytic cell(3). The present process includes forming in anode compartment(2) a slurry of ore or concentrate (1) with a chloride and copper-ion containing solution, intimately mixing oxygen bearing gas(7) with the slurry, maintaining the slurry substantially at atmospheric pressure and at a temperature up to the boiling point of the slurry, and maintaining the pH of the slurry from 1 to 4, whereby zinc passes into solution. At least a portion of the slurry is withdrawn and a zinc and copper rich solution(12) separated therefrom. Fresh zinc bearing ore or concentrate(1) is contacted with solution(12) thereby precipitating ionic copper therefrom. Resultant solution(15) is introduced to the cathode compartment (16) and zinc is electrochemically recovered at the cathode(5).
Time: 8