贾家堡子铁矿8号矿体矿石选矿工艺研究

为了给大规模合理开发本钢集团贾家堡子铁矿8号矿体矿石资源提供技术依据，针对该矿石磁铁矿嵌布粒度微细的特点，采用大块干式磁选抛废-单一弱磁选和大块干式磁选抛废-弱磁选-反浮选两种工艺流程进行了选矿试验。结果表明：前者在-0.030 8 mm占90%的最终磨矿细度下，可获得铁品位为65.76%、回收率为75.93%的铁精矿；后者在-0.043 mm占90%的最终磨矿细度下，可获得铁品位为65.47%、回收率为74.43%的铁精矿。两流程技术指标相近，采用哪种流程取决于技术经济比较。

Research on the Beneficiation Process of No.8 Ore-body of Jiajiapuzi Iron Ore

In order to provide technical basis for rationally developing mineral resources at No.8 ore-body of Benxi Iron and Steel Group in large-scale, and in view of the characteristics of micro-fine embedded magnetite, the beneficiation tests were carried by the process of bulk dry magnetic separation for tailings removal-single low intensity magnetic separation and the process of bulk dry magnetic separation-low intensity magnetic separation-reverse flotation. The results showed that iron concentrate with Fe grade of 65.76% and recovery of 75.93% was obtained by the former under the final grinding fineness -0.030 8 mm 90%；Iron concentrate with Fe grade of 65.47%, recovery of 74.43% was obtained by the latter under the grinding fineness of -0.043 mm 90%. Since the technical indexes obtained by the two processes are similar, which one you adopted depends on the technical and economical comparison.