ZCLA选矿机湿式预选和睦山选厂磨前产品工业试验与生产实践

马钢和睦山选矿厂入磨磁铁矿石（20～0 mm）中存在大量废石，导致磨选及其后续系统负荷大、生产成本高、尾矿库压力大、影响最终精矿品质的提升。为解决这些问题，采用ZCLA950-2000选矿机进行了湿式预选抛废工业试验，并根据工业试验结果实施了ZCLA湿式预选系统改造和效果考查。在分选筒倾角为15°、转速为11.3 r/min、处理量为150 t/h、分选矿浆浓度为47%的条件下，处理TFe品位为34.06%的矿石，取得了抛废产率为19.73%、尾矿TFe品位为10.67%的试验指标；处理TFe品位为29.19%～37.64%的矿石，取得了抛废产率为10.93%～29.72%、MFe回收率高达98%以上的生产指标。生产实践表明，ZCLA湿式预选及其配套系统运行顺畅、平稳、可靠，ZCLA950-2000选矿机对现场矿石铁品位波动的适应能力较强，对低品位、高废石混入率矿石具有更高效的抛废能力，能有效控制磁性铁矿物的流失，是和睦山选矿厂磨前预选的理想设备；该工艺系统的运行提高了入磨品位，减少了磨选及其后续系统的处理量，减轻的尾矿库压力，降低了选矿厂的生产成本，增加了企业的利润增长点。

Industrial Test and Practice of ZCLA Separator for Wet Pre-concentration of Pre-Grinding Products in Hemushan Plant

AbstractThere are a large number of waste rock in magnetic iron ore （20～0 mm ） in Hemushan Magnetite of Masteel Group to grind， resulting in heavy load of grinding and subsequent system, increasing the operating cost of plan and the tailings pond reserve pressure, and affecting the upgrading of the final concentrate quality. In order to solve these problems， the ZCLA 950-2000 separator was used to carry out the wet pre-concentration and waste-disposal industrial test research, and the ZCLA wet pre-concentration system was reconstructed and the effect was tested according to the industrial test results. The ore with TFe grade of 34.06%was treated under the condition that the drum slope is 15°， rotate speed of drum is 11.3 r/min， the processing capacity is 150 t/h, and the pulp concentration is 47%，and the test indexes of discarding yield rate of 19.73% and TFe grade of tailings is 10.67% are obtained； the ore with TFe grade of 29.19%～37.64% is treated，and the discarding yield rate is 10.93%～29.72% and the MFe recovery rate of higher than 98% indicators. Production practice shows that the ZCLA wet pre-selection and its supporting system run smoothly, stably and reliably. ZCLA950-2000 separator has strong adaptability to the fluctuation of iron grade of ore on-site， and has more efficient throwing for low-grade and high waste rock mixed rate ore. The waste capacity can effectively controlled the loss of magnetic iron minerals. It is the ideal equipment for pre-concentration before grinding in Hemushan Plant. The operation of the process system improves the grade of grinding， reduces the processing capacity of grinding and subsequent systems. The tailing pond reserve pressure reduces the production cost of the concentraror and increases the profit growth point of the enterprise.