方铅矿与黄铁矿浮选分离的矿浆电化学研究Ⅲ.方铅矿与黄铁矿混合精矿的浮选分离

来源期刊：中南大学学报(自然科学版)1995年第6期

论文作者：冯其明 陈荩 许时

文章页码：739 - 743

关键词：浮选; 方铅矿; 黄铁矿/丁基黄药; 矿浆电化学

Key words：flatation,galena; pyrite / bubhyl ranthate; pulp electrochemistry;

摘    要：以丁基黄药为捕收剂的方铅矿与黄铁矿混合精矿体系,按照电位与可浮性的关系,两矿物在还原性矿浆电位浮选分离的电位差在热力学上仅为50mV,而在动力学上达到了207mV。采用接触角测定、单矿物浮选、混合矿分离等方法,可以证实依据方铅矿表面丁基黄原酸铅和黄铁矿表面丁基双黄药的电化学还原动力学性质的差异,实现方铅矿与黄铁矿混合精矿的电化学浮选分离。

Abstract: According to the relation between pulp potential and flotation,the pulp potential rangein which bulk concentrate of galena and pyrite can be separated is as narrow as 50 mV inthermodynamics,but is widened to 207 mV under the reduced pulp potential based on thedifference of electrochemically reduced kinetic behavior between lead buthyl xanthate ongalena and buthyl dixanthogen on pyrite surface. This conclusion is proved fully by contactangle measurements,single mineral flotation and bulk concentrate separation of galena andpyrite unde controlled pulp potential at pH9.18 to 9.5.