基于磨矿动力学的非铁介质制度优化试验研究

以南京、云南两地的铅锌矿样为试验对象，依据两个试验样重要金属矿物的嵌布粒度不均匀，其中闪锌矿相对较粗，黄铁矿次之，方铅矿比较细，在磨矿过程中三者单体解离程度不一致的工艺矿物学特性，对其进行窄粒级非铁介质和全粒级多级配非铁介质磨矿对比试验，预期通过非铁磨矿介质制度的优化，提高磨矿产品粒度均匀性，减少过磨粒级含量。结果表明，两个试验样的粗粒级矿物颗粒含量随时间的变化规律符合磨矿动力学方程，各窄粒级—3.35+1.70、—1.70+0.85、—0.85+0.425和—0.425+0.15 mm在球径尺寸分别为45、40、35和30 mm时磨矿效率最高。由此制定的非铁介质制度磨矿产品粒度分布趋于均匀，—0.15+0.010 mm中间粒级含量高，并且在磨矿效率较高时，具有粗颗粒磨细能力和过粉碎程度轻的优势。

Experimental Study on Optimization of Non-iron Medium System Based on Grinding Kinetics

Taking -3.35mm lead-zinc mine in Nanjing and Yunnan as test samples, according to their process mineralogy characteristics, which were divided into narrow size fractions for grinding kinetics test with non-iron medium and full size fraction multi-grade grinding contrast test with non-iron medium. The test results showed that the grinding efficiency of the test samples with narrow particle sizes of -3.35+1.70mm, -1.70+0.85mm, -0.85+0.425mm and -0.425+0.15mm was the highest when the ball diameters were 45mm, 40mm, 35mm and 30mm, respectively. The particle size distribution of grinding products in the non-iron medium system thus formulated tends to be uniform, with a high content of -0.15mm+0.010mm intermediate fraction, which has the advantages of high grinding efficiency, fine grinding ability of coarse particles and light degree of over-grinding.