| 摘要 |
<p>In a hydrometallurgical process for converting zinc sulfide in an ore containing zinc sulfide, the zinc sulfide being chemically converted at elevated temperatures to ZnSO4.xH2O which crystallizes substantially in t he monohydrate form as ZnSO4.H2O in a conversion solution having a high concentration of H2SO4, the improvement comprises: (i) selecti ng an ore which contains both zinc sulfide and copper sulfide, the ore containing greater than 1% by weight of copper, (ii) contacting the zinc sulfide/copper sulfide ore with a conversion solution comprises a concentration of sulfuric acid selected from the range of about 45% by weight up to about 70% by weight of the conversion solution and at the elevated temperature in the range of 90.degree.C to less than boiling point of the conversion solution for the selected concentration of sulfuric acid; (iii) ensuring a reducing condition in the conversion solution, by virtue of the concentration of H2SO4, temperature, and maintenance of atmospheric pressure, to produce continuously sufficient H2S to preclude oxidation of the copper sulfide; (iv) maintaining the conversion solution a the elevated temperature and at the range of concentration of the sulfuric acid to ensure continued formation of the crystals of ZnSO4.H2O until substantially all available ZnSis chemically converted; and (v) separating the ZnSO4.H2O crystals and remaining solids of the ore from the conversion solution.</p> |
