关键词: 贾家堡子铁矿8号矿体, 微细粒嵌布磁铁矿, 大块干式预选, 弱磁选, 反浮选

Abstract: 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.

Key words: No.8 ore-body of Jiajiapuzi iron ore, Micro-fine embedded magnetite, Bulk dry concentration, Low intensity magnetic separation, Reverse flotation