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2011-Sustainable Industrial Processing Summit
|Publisher:||Flogen Star OUTREACH|
|ISSN:||2291-1227 (Metals and Materials Processing in a Clean Environment Series)|
FLSmidth research area is developing a new process to direct treatment of zinc concentrate. Three Pyrometallurgical options are evaluated, Roasting, Oxidative Reduction and Water Vapor Oxidation. A thermodynamic and experimental investigation is conducted to develop a new process to extract Zinc Sulfide into pure Zinc by evaluation of these three processes. The kinetics of the reaction are determined by measuring the weight change of a sample with time in water vapor at temperatures between 800-1200oC. The results are analyzed by a Shrinking Unreacted Core model under chemical reaction control. Recoveries of >90% of Zinc, with little Iron contamination and reduced CO2 gas emission product are expected.