Since the iron ore concentrator of Masteel Luohe Iron Mine was put into operation,there are such problems needed to be solved,that the capacity of stageⅠball mill can′t meet the design requirements,the sulfur content in the iron con-centrate of LIMS is over the standard,the separation index of the hematite concentrate is poor and the copper in the sulfur con-centrate is not recycled.In order to solve the problems above,on the basis of the whole process investigation on the grinding and dressing system in the dressing plant,the grindability of the ore was researched to verify the processing effect in the labora-tory tests with referencing the process parameters of field sulfur flotation,LIMS,HIMS and gravity separation operation.The separation process of copper and sulfur in the sulfur concentrate which contains copper was studied.According to the research results,the improvement measures for the outstanding problems in the dressing plant were put forward.After the completion of sulfur reduction in the magnetite concentrate and copper-sulfur separation,the S content of the field magnetite concentrate will be reduced from 0.51% to less than 0.30%;copper concentrate separated from sulfur concentrate with production rate of 0.82% ( to sulfur concentrate),Cu grade of 17.51%,recovery rate of 59.54% (to sulfur concentrate) was obtained.%马钢罗河铁矿选矿厂自建成投产以来,存在一段球磨机处理能力不能达到设计要求、弱磁选铁精矿含硫超标、赤铁矿精矿选别指标差、硫精矿中的铜未能回收利用等问题.为解决上述问题,在对选矿厂磨选系统进行全流程考查的基础上,研究了矿石的可磨性特征,参照现场硫浮选、弱磁选、强磁选、重选作业的工艺参数,在实验室进行了选别效果验证试验,并详细研究了含铜硫精矿的铜硫分离工艺.根据研究结果,对选矿厂所存在的突出问题提出了改进措施.在完成磁铁精矿降硫和铜硫分离工艺优化改造后,有望使现场磁铁精矿S含量由0.51%降到0.30%以下;从硫精矿中分离出产率(对硫精矿)为0.82%、Cu品位为17.51%、Cu回收率(对硫精矿)为59.54%的铜精矿.
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