新型季铵盐捕收剂对白钨矿和方解石的常温浮选分离

采用二辛基二甲基溴化铵(DDAB)作捕收剂,研究白钨矿、方解石单矿物的浮选行为和其人工混合矿的浮选分离以及柿竹园白钨矿的常温精选。结果表明:在单矿物和人工混合矿的浮选中,DDAB在对白钨矿的捕收能力和选择性上均显著优于油酸,其最佳的浮选pH值范围为8~10;在对柿竹园白钨矿的常温精选中,DDAB取得了开路最终浮选精矿WO3品位51.63%,回收率43.83%的良好指标。这些都证明DDAB是一种新型高效的白钨矿常温精选捕收剂。通过对白钨矿和方解石的表面动电位分析、DDAB的结构分析以及DDAB与白钨矿作用的红外光谱分析和量子化学分析,推断DDAB主要依靠静电力与白钨矿表面作用。

Flotation separation of scheelite and calcite at ambient temperature using new quaternary ammonium salt as collector

The flotation behavior of scheelite and calcite,the flotation separation of artificial mixed minerals with scheelite and calcite and the flotation of ores from Shizhuyuan by using dioctyl dimethyl ammonium bromide(DDAB) were all investigated.The results show that,in the flotation of scheelite,calcite and their artificial mixed minerals,DDAB exhibits a strong collecting and selective ability for scheelite,which is much better than that of oleic acid,and the best separation can be achieved over pH range of 8-10.Also,the grade and recovery of concentrates reach 51.63% WO3 and 43.83%,respectively,in the flotation of scheelite from Shizhuyuan at ambient temperature with DDAB.All above proves that DDAB is a new effective collector for ambient-temperature concentrating scheelite.Furthermore,the mechanism of DDAB interacting with scheelite were investigated through analysis of zeta potentials of scheelite and calcite,FTIR analysis and quantum chemical analysis of the interaction between DDAB and scheelite,and the conclusion was that they interact through electrostatic forces.