氨—碳铵法浸出含锌烟灰

Leaching of Zinc-bearing Ash with Ammonia-ammonium Bicarbonate Process

研究氨—碳铵体系中pH、总氨浓度、液固比(L/S)、反应温度、反应时间等因素对三种含锌烟灰中锌和主要杂质元素浸出行为的影响。结果表明,较佳的工艺条件是:浸出剂总氨浓度9mol/L、pH=10.00、L/S=5、反应温度50℃、反应时间60min。此时锌浸出率大于80%。

The effects of pH, total ammonia concentration of ammonia-ammonium bicarbonate system, ratio of solid to liquid （L/S）, temperature and leaching time on the leaching behavior of zinc and main impurities in three kinds of zinc-bearing ash were investigated. The results show that the zinc leaching rate is over 80% under the optimum conditions including total ammonia concentration of 9 mol/L and pH of 10.00, L/S of 5, temperature of 50℃, and the leaching time of 60 min.