关键词: 赤铁矿尾矿, 强磁选, 反浮选

Abstract: Main ore mineral of a hematite tailing is hematite,and the gangue minerals are mainly quartz.It contains iron of 18.78%,SiO₂ of 73.25%,and low content of harmful elements such as S,P,with iron mainly enriched in fine particles.In order to explore the possibility of the development and utilization of tailings,beneficiation experiments are carried out based on the analysis of the ore property.The results show that at the grinding fineness of 95% -42 μm,iron concentrate with iron grade of 64.75%,recovery rate of 78.69% is finally obtained by adopting the closed circuit reverse flotation process of high intensity magnetic separation (background magnetic induction intensity for 1 T) for pre-concentration,one roughing-one cleaning-one scavenging (middlings back to the flow-sheet in turn) to deal with the sample.

Key words: Hematite tailings, High intensity magnetic separation, Reverse flotation