梅山铁矿精确化磨矿工业试验研究  

Commercial Tests on Precise Grinding of Iron Ore from Meishan Iron Mine

作　　者：刘安平 吴彩斌[2] 严刘学 石贵明[2] 邹春林[2] 

机构地区：[1]宝钢梅山矿业分公司选矿厂,江苏南京210041 [2]江西理工大学江西省矿业工程重点实验室,江西赣州341000

出　　处：《矿冶工程》2014年第5期58-61,共4页Mining and Metallurgical Engineering

摘　　要：为了提高磨矿均匀性和降低磨矿过程成本,梅山铁矿选矿厂在四系列进行了精确化磨矿工业试验。结果表明,与应用前相比,二段分级溢流产品中平均粒度加粗10%;合格粒级含量提高1.82个百分点,提高幅度为2.35%;-10μm粒级含量降低了1.05个百分点,降低幅度为6.91%。磁选尾矿中-10μm粒级含量下降15.56个百分点,降低幅度25.52%;平均粒度加粗0.06 mm,加粗幅度150%。同时磨机功耗下降1.68 kWh/t,钢球单耗下降0.1 kg/t,磨机噪音下降2~6 dB,磨矿矿浆温度降低0.5~2℃,一段磨磨机衬板使用寿命估计可延长6个月,二段磨磨机衬板使用寿命可延长1年以上,折合降低磨矿成本1.70元/t,取得了非常显著的节能降耗效果。四系列研究成果已经在其他系列同类型磨矿作业中推广应用。In order to obtain homogeneous grinding fineness and lower grinding cost, commercial tests on precise grinding were conducted for №4 product line of concentrator in Meishan Iron Mine. Results showed that after optimization, the average fineness of the overflow from the second stage of classification increased by 10%. The rate of particles with qualified size increased 1.82 percentage points, a 2.35% rise, while the rate of particles at the grinding fineness of -10μm decreased 1.05 percentage points, a fall of 6.91%. As for the tailings from magnetic separation, the rate of particle size of -10 μm range decreased 15.56 percentage points, a fall of 25.52%, and an average increase of 0-06 mm in particle size, a 150% rise. Meanwhile, the power consumption dropped 1.68 kWh/t, the ball consumption dropped 0. 1 kg/t, the processing noise dropped by 2~6 dB and the pulp temperature decreased by 0. 5~2 ℃. Consequently, the service life of mill liners for the first stage and the second stage of milling can be extended for around six months and over a year, respectively, equivalent to a 1.70 RMB/t reduction in cost. This research results have been applied into milling operations of other series.

关 键 词：精确化磨矿 分级溢流产品质量 节能降耗 磨矿条件 

分 类 号：TD453[矿业工程—矿山机电]