华阳川铀铌铅低品位多金属矿选矿综合回收技术研究

针对华阳川低品位铀铌铅多金属矿，首先利用重选将矿石中的铀铌铅有价金属进行预富集，通过预先筛分、阶段磨矿等方式减少矿石泥化，提高了有价金属的重选回收率；然后从重选精矿中回收伴生的方铅矿和磁铁矿，得到了放射性和品位均合格的铅精矿和铁精矿，实现了伴生金属的综合回收；最后采用苯甲羟肟酸作为捕收剂直接浮选铌钛铀矿，获得了高回收率和高品位的铀铌精矿。最终指标为:铅精矿产率0.67%，铅品位57.85%，回收率69.48%；铁精矿产率3.05%，铁品位64.50%，回收率65.87%；铀铌精矿产率1.76%，铀品位0.702%，回收率77.89%，铌品位0.695%，回收率72.55%。 

Study on Comprehensive Recovery Technology of Hua Yangchuan Low Grade U-Nb-Pb Polymetallic Ore

For the Hua Yangchuan low-grade uranium niobium lead polymetallic ore, the valuable metals in the ore were preconcentrated by gravity separation, and the slime of ore was reduced by prescreening and stage grinding, which could improve the gravity separation recovery rate of valuable metals. Then the associated galena and magnetite were recovered from the gravity concentrate, and the lead concentrate and iron concentrate with qualified radioactivity and grade were obtained, which realized the comprehensive recovery of associated metals. Finally, benzohydroxamic acid was used as a collector to directly flotation betafite, and the uranium-niobium concentrate with high recovery and high grade was obtained. The final indicators were obtained with the lead concentrate yield of 0.67%, lead grade of 57.85%, lead recovery of 69.48%; iron concentrate yield of 3.05%, iron grade of 64.50%, iron recovery of 65.87%; uranium niobium concentrate yield of 1.76%, uranium grade of 0.702%, uranium recovery of 77.89%, niobium grade of 0.695%, niobium recovery of 72.55%.