云南某铅锌矿二段磨矿参数优化对比试验研究  

Comparative Experimental Study on Optimization of Second Stage Grinding Parameters of a Lead-Zinc Mine in Yunnan

作　　者：张志鹏 周强[1] 肖庆飞[1,2,3] 谢浩松 任英东 ZHANG Zhipeng;ZHOU Qiang;XIAO Qingfei;XIE Haosong;REN Yingdong(School of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China;State(Beijing)Key Laboratory of Automatic Control Technology for Mining and Metallurgy Process,Beijing 100070,China;State Key Laboratory for Clean Utilization of Complex Nonferrous Metal Resources Jointly Built bythe Provincial and Ministerial De partments,Kunming 650093,China)

机构地区：[1]昆明理工大学国土资源工程学院,昆明650093 [2]矿冶过程自动控制技术国家(北京市)重点实验室,北京100070 [3]省部共建复杂有色金属资源清洁利用国家重点实验室,昆明650093

出　　处：《有色金属（选矿部分）》2023年第2期71-77,149,共8页Nonferrous Metals（Mineral Processing Section）

基　　金：国家自然科学基金资助项目(51964044);云南省地方高校(部分)联合专项项目(2018FH001-051);云南省教育厅基金项目(2019J0738)。

摘　　要：针对云南某铅锌矿二段球磨机磨矿产品粒度不均匀等问题,分别进行不同磨矿介质配比、充填率、磨矿浓度试验。通过测定矿石力学性质和二段球磨机给矿粒度组成,利用球径半理论公式计算出推荐钢球方案m(Φ40 mm):m(Φ30 mm):m(Φ20 mm)=20:45:35,按照质量相等原则,得到相应钢段(D×L)配比(35 mm×40 mm):(25 mm×30 mm):(20 mm×25 mm)=20:45:35。对比试验结果表明,推荐钢段方案中间易选级别(-0.074+0.010 mm)含量最高为76%,过粉碎(-0.010 mm)含量最低为12.18%;充填率达到24%,与现场充填率对比,中间易选级别(-0.074+0.010 mm)产率提高2.1个百分点,粗级别(+0.1 mm)减少了0.21个百分点,过粉碎级别(-0.01 mm)含量仅增加1.33个百分点;磨矿浓度70%时,中间易选级别(-0.074+0.01 mm)与过粉碎级别(-0.01 mm)含量提高1.56与1.6个百分点,粗级别(+0.1 mm)含量降低0.36个百分点。因此,推荐钢段(D×L)方案(35 mm×40 mm):(25 mm×30 mm):(20 mm×25 mm)=20:45:35、充填率24%、磨矿浓度70%可有效提高磨矿工艺指标。Aiming at the problems of uneven particle size of grinding products of the second stage ball mill in a lead-zinc mine in Yunnan province,experiments were carried out on different grinding medium ratio,flling rate and grinding concentration.By measuring the mechanical properties of the ore and the feed particle size composition of the two-stage ball mill,the recommended steel ball scheme m was calculated by using the semi theoretical formula of ball diameter m(Ф40 mm):m(Ф30 mm):m(Ф20 mm)=20:45:35,according to the principle of equal quality,the corresponding steel section ratio is obtained D×L(35 mm×40 mm):(25 mm×30 mm):(20 mm×25 mm)=20:45:35.The comparative test results showed that the content of easy to choose grade(-0.074+0.010 mm)in the middle of the recommended steel section scheme was the highest 76%,and the content of over crushing(-0.010 mm)was the lowest 12.18%.The filling rate reached 24%.Compared with the on-site filling rate,the yield of intermediate easy selection level(-0.074+0.010 mm)increased by 2.1 percentage points,the coarse level(+0.10 mm)decreased by 0.21 percentage points,and the content of over crushing level(-0.010 mm)increased by only 1.33 percentage points.When the grinding concentration was 70%,the content of intermediate easy dressing grade(-0.074+0.010 mm)and over crushing grade(-0.010 mm)increased by 1.56 and 1.6 percentage points,and the content of coarse grade.(+0.10 mm)decreased by 0.36 percentage points.Therefore,steel section scheme was recommended D×L(35 mm×40 mm):(25 mm×30 mm):(20 mm×25 mm)=20:45:35,filling rate 24%and grinding concentration 70%can effectively improve the grinding process indexes.

关 键 词：介质配比 钢段 充填率 磨矿浓度 指标优化 

分 类 号：TD921.6[矿业工程—选矿]