摘要
针对新疆某高硅低铁锌焙砂进行中性浸出—液固分离试验研究,详细考察了浸出时间、浸出液固比、浸出温度和始酸浓度对焙砂浸出和矿浆絮凝沉降的影响。结果表明,浸出温度、浸出时间和浸出液固比对锌的浸出影响较大,对硅的浸出影响不具明显规律;矿浆絮凝沉降受浸出条件影响较大,改变浸出液固比、初始酸度和矿浆浓度能够显著改善矿浆沉降性能。综合考虑锌、硅的浸出行为和矿浆沉降性能,最佳浸出工艺选择为:浸出温度70℃、浸出时间2.5 h、液固比(mL/g)为8~10;中性浸出液初始酸度为40 g/L时所得中性浸出渣含锌46.56%,渣率77.47%,锌的中性浸出率为45.06%,絮凝沉降矿浆浓度为4.5%。
In this paper,the effects of leaching time,L/S,leaching temperature and initial acid concentration on high-silicon-low-iron zinc calcine leaching and slurry flocculation sedimentation were investigated in detail.The results show that the leaching temperature,leaching time and L/S have great influence on the leaching of zinc,but the influence on silicon is not obvious.The flocculation and sedimentation of slurry are greatly affected by leaching conditions.The sedimentation performance of slurry can be significantly improved by changing L/S,initial acidity and slurry concentration.Considering the leaching behavior of zinc and silicon and the settling property of slurry,the optimal process parameters were:70℃of leaching temperature,2.5 h of leaching time,8-10 of L/S(mL/g),40 g/L of the neutral leaching solution initial acidity.The zinc content of the neutral leaching residue reached 46.56%.The leaching residue rate reached 77.47%.The neutral leaching rate of zinc reached 45.06%.The flocculation sedimentation slurry concentration was selected to be 4.5%.
作者
秦树辰
刘三平
郑朝振
李强
QIN Shu-chen;LIU San-ping;ZHENG Chao-zhen;LI Qiang(BGRIMM Technology Group,Beijing 100160,China)
出处
《矿冶》
CAS
2020年第4期68-72,87,共6页
Mining And Metallurgy
基金
国家自然科学基金资助项目(51434001)
“十三五”国家重点研发计划项目(2018YFC1900400)
北矿科技集团青年创新基金资助项目(QCJ201823)
科技部科技伙伴计划资助国际合作项目(KY201502004)。
关键词
高硅低铁锌焙砂
中性浸出
液固分离
絮凝沉降
high-silicon-low-iron zinc calcine
zinc calcine
neutral leaching
liquid-solid separation
flocculation and settling
