关键词: 钼浮选尾矿, 磁选, 铁精矿, 塔磨

Abstract: The iron grade of a molybdenum flotation tailings in Henan is 12.55%，with iron mainly oc⁃ curring in magnetic iron，accounting for a distribution rate of 66.85%，indicating potential recovery value. To enhance the comprehensive utilization of resources and reduce tailings stockpiling and environmental risks，beneficiation experiments and industrial practices for iron recovery from these tailings were conduct⁃ ed. Based on process mineralogy studies and conditional tests，a process flow of wet magnetic separation pre-concentration—tower grinding—one roughing and one cleaning magnetic separation was determined. The pre-concentration magnetic induction intensity was 500 mT，the tower grinding fineness was 90% pass⁃ ing 45 μm，the roughing magnetic induction intensity was 280 mT，and the cleaning magnetic induction in⁃ tensity was 150 mT. This achieved experimental results of iron concentrate with iron grade of 66.75% and re⁃ covery rate of 58.11%. In on-site production，the iron concentrate grade reached 65.56%，with recovery rate of 59.35% and SiO₂ content of 4.87%. This realized the efficient recovery of iron from low-grade molyb⁃ denum tailings，providing technical reference for the resource utilization of similar mine tailings.

Key words: molybdenum flotation tailings, magnetic separation, iron concentrate, tower grinding