摘要
针对某选矿厂细碎机破碎能力有较大富余,球磨机给矿粒度偏粗的问题,通过降低筛板筛孔尺寸,分别在生产筛板(筛孔尺寸14 mm×20 mm)与试验筛板(筛孔尺寸10 mm×40 mm)条件下对细碎筛分作业、球磨分级作业进行流程考察研究。结果表明:采用试验筛板后,细筛分级产品中-12.0 mm含量由88.09%(F95=15.20 mm)提升至98.71%(F95=10.31 mm);当一段球磨处理量分别为295 t/h、310 t/h、和325 t/h时,二段分级溢流中-0.074 mm粒级含量分别由79.86%增加到86.86%、77.03%增加到87.68%,75.63%增加到84.45%。更换筛板后,细碎筛分产品和二段分级溢流产品的粒度均明显变细。破碎筛分流程的优化充分发挥了破碎机的破碎能力,降低了球磨机的给矿粒度。
Aiming at the large crushing capacity of a fine crusher in a concentrator and the coarse grain size of the ball mill feed,by reducing the sieve size of sieve plate in a concentrator,the fine grinding and sieving operation,primary and secondary ball milling classification were examined under the conditions of producing sieve plate(sieve size 14 mm×20 mm)and test sieve plate(sieve size 10.0 mm×40 mm)respectively. The results show that the content of-12.0 mm in fine screen?ing and grading products increased from 88.09%(F95=15.20 mm)to 98.71%(F95=10.31 mm).When the first stage milling capacity is 295 t/h,310 t/h and 325 t/h,the particle size content of-0.074 mm in the second stage graded overflow increases from 79.86% to 86.86%,77.03% to 87.68% and 75.63% to 84.45%,respectively. After the sieve plate was replaced,the par?ticle size of the fine screening product and the secondary graded overflow product are significantly thinner. The optimization of crushing and sieving process gives full play to the crushing ability of crusher and reduces the feed size of ball mill.
作者
肖汉新
唐学飞
刘杰
李艳军
杨光
Xiao Hanxin;Tang Xuefei;Liu Jie;Li Yanjun;Yang Guang(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China;National-Local Joint Engineering Research Center of Refractory Iron Ore Resources Efficient Utilization Technology,Shenyang 110819,China;Donganshan Sintering Plant,Anshan Mining Co.,Ansteel Group,Anshan 114041,China)
出处
《金属矿山》
CAS
北大核心
2019年第2期168-172,共5页
Metal Mine
基金
国家自然科学基金项目(编号:51674066
51204035)
关键词
细碎机
破碎能力
筛板对比
磨矿分级
Fine crusher
Crushing capacity
Sieve plate comparison
Grinding classification
