锌焙砂干磨特性及其干式磨矿工艺指标优化试验研究

Experimental Study on Dry Grinding Characteristics of Zinc Roast Sand and Optimization of Dry Grinding Process Indicators

锌焙砂磨矿是现行主流锌湿法冶金的必要环节,良好的磨矿指标可为后续高效提取锌及共伴生有价金属提供有利条件,在实际生产中锌焙砂干式磨矿应用普遍。针对湖南某有色冶炼公司锌焙砂磨矿效率低、磨矿产品细度不达标的问题进行锌焙砂干式磨矿研究,详细考察了充填率钢球球径、钢球配比等磨矿参数对锌焙砂磨矿的影响,结合实验室研究结果和生产现场情况,进行工业试验,在优化后的磨矿制度下,现场磨矿产品细度由原来的-0.18mm粒级占比85%~95%和-0.074mm粒级占比40%~60%显著提高至-0.18mm占比100%,-0.074mm占比80%,满足工程应用所要求的指标,成果也可为其它企业锌焙砂干式磨矿技术指标的优化提供参考。

Zinc calcination grinding is a necessary link in the current mainstream zinc hydrometallurgy.Good grinding indicators can provide favorable conditions for the efficient extraction of zinc and co associated valuable metals in the future.Dry grinding of zinc calcination is widely used in practical production.A dry grinding study of zinc calcine was conducted to address the issues of low grinding efficiency and substandard grinding product fineness in a non-ferrous smelting company in Hunan.The effects of grinding parameters such as filling rate,steel ball diameter,and steel ball ratio on zinc calcine grinding were investigated in detail.Based on laboratory research results and production site conditions,industrial experiments were conducted.Under the optimized grinding system,The fineness of on-site grinding products has significantly increased from the original-0.18mm particle size ratio of 85%~95%and-0.074mm particle size ratio of 40%~60%to-0.18mm particle size ratio of 100%and-0.074mm particle size ratio of 80%,meeting the indicators required for engineering applications.The results can also provide reference for optimizing the technical indicators of zinc calcine dry grinding in other enterprises.