某铅锌矿立磨机与球磨机磨矿效果对比试验研究

Comparative Experimental Study on the Grinding Effect of a Lead-zinc Mine Through Vertical Mill and Ball Mill

立磨机和球磨机都是大型工业磨粉设备,被广泛应用于选矿、冶金、化工和煤炭等行业。本文针对某铅锌矿对比两种磨机的磨矿效果,采用立磨机与球磨机进行磨矿试验,并对试验产品进行筛分分析、单体解离度分析及浮选试验。试验结果表明:立磨机磨矿试验产品中粗粒级含量较球磨机试验产品下降了0.6百分点,方铅矿和闪锌矿单体解离度分别提高2.28和1.60百分点;立磨—浮选试验产品中铅精矿中铅品位及累计回收率较球磨机分别提高0.65和0.61,锌精矿中锌品位及累计回收率较之分别提高0.34和1.03百分点,硫精矿中铅和锌含量分别下降0.02、0.06百分点。综上所述针对该铅锌矿立磨机磨矿效果均优于球磨机。

Both vertical mills and ball mills are large grinding equipment in industry,which are widely used in mineral processing,metallurgy,chemical engineering,coal,and other fields.The vertical mill and ball mill were used for grinding tests to compare the grinding effect on certain lead-zinc ore,meanwhile sieve analysis,monomer dissociation analysis and froth flotation tests on above products were also conducted.The results of sieve analysis and monomer dissociation analysis showed that the content of coarse fraction in the product after vertical mill grinding decreased by 0.6 percentage compared with the test results of ball mill.In addition,the liberation degree of galena and sphalerite increased by 2.28 and 1.60 percentage respectively.The froth flotation tests demonstrated that compared with the ball mill-flotation test results,the grade and cumulative recovery of lead in the lead concentrate increased by 0.65 and 0.61 respectively,and the grade and cumulative recovery of zinc in the zinc concentrate increased by 0.6 and 0.6 respectively.The lead and zinc content in the sulfur concentrate decreased by 0.02 and 0.06 percentage.In summary,the grinding effect of the vertical mill for this lead-zinc ore is better than that of the ball mill.