金山店铁矿提高铁精矿品位的试验研究

Experimental Study on Improving of Iron Concentrate Grade of Jinshandian Mine

金山店铁矿随着地下开采深度增加,矿石嵌布粒度变细,贫化率增加,采用原工艺流程精矿铁品位逐年降低。结合现场工艺流程,采用CH-CXJ34000淘洗磁选机代替原CTB1230半逆流型湿式滚筒磁选机进行了四段磁选作业试验,结果表明,在给矿品位相同时,采用淘洗磁选机获得的精矿铁品位为66.15%,而采用原滚筒磁选机获得的精矿品位仅64.10%。选别工艺优化改造后,实现了提铁降杂的目的,对同类矿山具有推广价值。

With the increase of underground mining depth in Jinshandian Iron Mine,the disseminated particle size of ore becomes finer,the dilution rate increases,and the iron grade of concentrate using the original process flow decreases year by year.Combined with the on-site process,the four-stage magnetic separation operation test was carried out by using CH-CXJ34000 elutriation magnetic separator instead of the original CTB1230 semi-reverse flow wet drum magnetic separator.The results show that when the feed grade is the same,the concentrate iron grade obtained by the elutriation magnetic separator is 66.15%,while the concentrate grade obtained by the original drum magnetic separator is only 64.10%.After the opti⁃mization and transformation of the separation process,the purpose of increasing iron and reducing impuri⁃ties is realized,which has the promotion value for similar mines.