关键词: 超贫钒钛磁铁矿, 绿色分选, 梯级回收, 磁重浮联选, 综合利用

Abstract: In order to efficiently develop and utilize Shidonggou ultra-poor vanadium-titanium mag⁃ netite，aiming at the problems of multi-element symbiosis，complex embedding relationship and difficult comprehensive utilization of resources，green precision separation and multi-element cascade recovery ex⁃ periments are carried out.Through the analysis of ore properties and multi-process comparative tests，the occurrence state and associated relationship of useful minerals in the ore are clarified，and a new process of iron，titanium，phosphorus cascade recovery is established. Finally，iron concentrate with yield of 5.57%，iron grade of 65.11% and iron recovery of 25.83%，titanium concentrate with yield of 4.80%， TiO2 grade of 45.51% and TiO2 recovery of 55.72%，and phosphate concentrate with yield of 5.51%，P2O5 grade of 35.89% and P2O5 recovery of 80.72% are obtained. The dual goals of maximizing the utilization rate of iron，phosphorus and titanium resources and comprehensive utilization of tailings resources are real⁃ ized，which provides technical support and engineering paradigm for the clean and efficient development and utilization of the same type of multi-element intergrowth mineral.

Key words: ultra-poor vanadium-titanium magnetite, green separation, cascade recovery, magnetic gravity flotation combined separation, comprehensive utilization