摘要
针对非金属矿物石英砂含铁量较高,传统除铁提纯方法以及现有磁选设备分选指标较差,分选效率低的问题,研究了一种新型永磁磁选机——平板高梯度磁选机。从选矿效率的角度对平板高梯度磁选机的工作原理和过程进行分析,确定了影响分选品位的主要参数为:磁系长度、皮带倾角、皮带转速以及冲洗水量。运用Comsol仿真平台对磁选过程进行数值模拟,分析影响平板高梯度磁选机分选效率的关键参数,在实验研究中通过改变磁选机磁系长度、磁系倾角、皮带转速和冲洗水量,得到了不同条件下非磁性产品的产率、铁去除率等指标。结果表明:皮带转速和磁系倾角的变化以及冲洗水量对铁去除率有显著影响,当磁选机以磁系长度为1 m、皮带转速为5 r/min、平板倾角为5°和冲洗水量为8.3 L/min进行分选时,石英矿中Fe_(2)O_(3)含量从0.0359%降低至0.0166%,铁去除率为43.97%。实验结果与仿真结果为进一步提高平板高梯度磁选机的性能提供了技术参考,同时为非金属矿物石英砂的开发利用提供了研究基础。
In view of the high iron content of non-metallic minerals such as quartz sand,the traditional iron removal purification method and the poor separation index of the existing magnetic separation equipment,a new type of permanent magnetic separator,namely a flat-plate high-gradient magnetic separator(FPHGMS)was designed;and the mechanism of the working process of FPHGMS was analyzed from the perspective of of beneficiation efficiency to analyze and determine the impact.The main parameters for grade selection are:the length of the magnetic system,the inclination angle of the magnetic system,the speed of the belt and the amount of flushing water.The Comsol multiphysics simulation platform is used to numerically simulate the magnetic separation process,and the key parameters affecting the separation efficiency of FPHGMS are experimentally analyzed.By changing the magnetic system length,magnetic system inclination angle,belt speed,and flushing water amount,the quality of the non-magnetic product and the iron removal rate under different conditions are obtained.The results show that the change of belt speed,magnetic system inclination angle and flushing water amount have a significant impact on the efficiency of magnetic separation.When selecting under 1 m magnetic length,5 r/min belt speed,5°magnetic system inclination angle and 8.3 L/min flushing water,the Fe_(2)O_(3)grade in the quartz ore is reduced from 0.0359%to0.0166%,and the iron removal rate is 43.97%.The test results and simulation results provide technical reference for further improving the performance of FPHGMS,and at the same time provide a research foundation for the development and utilization of non-metallic minerals such as quartz sand.
作者
叶方平
李宸宇
曾剑武
汤亮
YE Fangping;LI Chenyu;Zeng Jianwu;TANG Liang(School of Mechanical Engineering,Hubei University of Technology,Wuhan 430068,China;School of Land and Resources Engineering,Kunming University of Science and Technology,Kunming 650093,China)
出处
《金属矿山》
CAS
北大核心
2021年第10期155-161,共7页
Metal Mine
基金
云南省创新基金项目(编号:2017EH090)。
关键词
平板高梯度磁选机
Comsol仿真
石英砂除铁
plate high gradient magnetic separator
Comsol simulation
iron removal from quartz sand
