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| Study of Zinc Electrowinning of Ammonia Leaching Solution from Zinc Oxide Ore |
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Received:March 03, 2014
Revised:March 07, 2014
Accepted:March 10, 2014
Published Online:July 21, 2014
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| DOI：doi：10.3969/j.issn.1007-7545.2014.08.001 |
| KeyWord:ammonia leaching; zinc ammonium complex; leaching; purify; electrowinning |
| Author | Institution |
| SANG Shi-hua |
成都理工大学材料与化学化工学院，矿产资源化学四川省高校重点实验室 |
| WANG Yuan |
成都理工大学材料与化学化工学院，矿产资源化学四川省高校重点实验室 |
| HU Yong-xia |
成都理工大学材料与化学化工学院，矿产资源化学四川省高校重点实验室 |
| TANG Ming-lin |
成都理工大学材料与化学化工学院 |
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| Abstract: |
| A new process to produce zinc from ammonia leaching solution of zinc oxide ores was studied. The effects of temperature, electricity, electrode space, and zinc mass concentration on current efficiency, and the influence of additives on quality of zinc board were investigated. The results show that zinc leaching rate in zinc oxide is 98%. The effective availability of ammonia is improved by pretreating limewash before leaching. The optimum electrowinning conditions include temperature of 20~40 ℃, electric current of 2.5 A, electrode space of 3.5 cm, dosage of gelatin, TP and TNB of 0.1 g/L, 0.1 g/L and 10 mg/L respectively, and cell voltage of 3.3 V. The electrolytic efficiency is 94.33%, power consumption for one tonnage zinc is 2 869 kWh, and zinc grade of electrolyzing zinc is 99.58%. |
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