关键词: 低品位细粒磁铁矿, 合理选矿工艺, 弱磁选, 阳离子反浮选

Abstract: The process of stage grinding，stage low intensity magnetic separation process and stage grinding，stage low intensity magnetic separation，cationic reverse flotation process was conducted in order to provide a reasonable beneficiation process for development and utilization of a fine low-grade magnetite ore from Xinjiang.The results showed that ①Iron concentrate with iron grade of 66.48% and recovery of 78.79% was obtained by adopting the process of stage grinding-stage low intensity magnetic separation process of three stage grinding and four stage low intensity magnetic separation at the third stage grinding fineness of 95.18% passing 0.038 mm; Iron concentrate with iron grade of 69.76% and recovery of 78.51% was achieved by adopting the process of two stage grinding，stage low intensity magnetic separation，cationic reverse flotation for the magnetic concentrate 2，regrinding for reverse flotation tailings，low intensity magnetic separation concentrate returned into the reverse rough flotation at the regrinding fineness of 96.34% passing 0.038 mm for reverse flotation tailings.② Even though single low intensity magnetic separation process is simple，the iron grade of final concentrate can be improved significantly by 3.28% under the condition of the last stage grinding capacity decreased by 22.99% through combined process of low intensity magnetic separation and cationic reverse flotation.

Key words: Fine low-grade magnetite, Reasonable beneficiation process, Low intensity magnetic separation, Cationic reverse flotation