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近年来,由于薄、贫矿体的开采,或者采矿方法等原因,致使采出的矿石贫化率高达20%以上.为了剔除回采中混入的围岩和脉石,提高磁铁矿石入选品位或入炉品位,节约能源,降低成本,国内一些磁选厂已应用磁滑轮对块矿磁铁矿进行预富集.磁滑轮具有结构简单,操作、维护容易,分选可靠,生产费用低等优点,但因使用时间尚短,对该设备的合理参数、磁场强度、扩大分选粒度范围还有待进一步研究、改
In recent years, due to the mining of thin and poor ore bodies, or mining methods and other reasons, resulting in mining ore depletion rate as high as 20% or more.In order to remove the surrounding rock and gangue mixed in the recovery of magnetite ore to improve the selected grade or into Furnace grade, energy saving and cost reduction, some magnetic separation plants in China have already applied magnetic sheaves to pre-enrich the ore-block magnetite.It has the advantages of simple structure, easy operation and maintenance, reliable sorting and low production cost, However, the use of time is still short, the reasonable parameters of the device, the magnetic field strength, to expand the size of the sorting remains to be further studied, change