CAJ | 학술논문

以湿法炼锌中浸渣为研究对象,通过对比几种不同类型还原剂对中浸渣中铁酸锌浸出效果,筛选铁酸锌高效还原浸出药剂-硫酸肼,并考察硫酸肼浓度、时间、初始酸度、温度及液固比对锌浸出效果的影响.探讨浸出过程中锌物相转变机制.在浸出初始阶段主要是锌的硫酸盐、氧化物、硅酸盐及硫化物等易溶态溶出,而铁酸锌在浸出120 min后大部分溶出.在优化条件下Zn和Fe的浸出率分别达到了95.83%和94.19%.
이습법련자중침사위연구대상,통과대비궤충불동류형환원제대중침사중철산자침출효과,사선철산자고효환원침출약제-류산정,병고찰류산정농도、시간、초시산도、온도급액고비대자침출효과적영향.탐토침출과정중자물상전변궤제.재침출초시계단주요시자적류산염、양화물、규산염급류화물등역용태용출,이철산자재침출120 min후대부분용출.재우화조건하Zn화Fe적침출솔분별체도료95.83%화94.19%.
This paper describes the behavior of reductive leaching of zinc from neutral leaching residue in zinc smelting. The effective reductant of hydrazine sulfate was selected by investigating the extraction efficiency of zinc from neutral leaching residue in zinc hydrometallurgical process among various types of reductant. The effects of initial concentration of hydrazine sulfate and sulfuric acid, retention, temperature and liquid-solid ratio on extraction were studied. Furthermore the transformation of zinc phases during the leaching was illustrated. The sulfate, oxide, silicate and sulfide of zinc were extracted fast at first and zinc ferrite was mostly leached out after reaction for 120 min. The leaching efficiencies of Zn and Fe were 95.83 % and 94.19 %respectively in optimum conditions.