铅锌分离中HEDP对活化闪锌矿的抑制性能及机理研究  

Study on Depressing Performance and Mechanism of HEDP on Activated Sphalerite in the Separation of Lead and Zinc

作　　者：朱环宇 刘华 杨丙桥 李毓豪 葛瑞琦 胡杨甲 罗惠华[1] ZHU Huanyu;LIU Hua;YANG Bingqiao;LI Yuhao;GE Ruiqi;HU Yangjia;LUO Huihua(School of Resources and Safety Engineering,Wuhan Institute of Technology,Wuhan 430073,China;BGRIMM Technology Group,Beijing 100160,China;State Key Laboratory of Mineral Processing,Beijing 102628,China)

机构地区：[1]武汉工程大学资源与安全工程学院,武汉430073 [2]矿冶科技集团有限公司,北京100160 [3]矿物加工科学与技术国家重点实验室,北京102628

出　　处：《有色金属（选矿部分）》2023年第5期145-152,共8页Nonferrous Metals（Mineral Processing Section）

基　　金：国家自然科学基金资助项目(52074196);武汉工程大学研究生教育创新基金项目(CX2021474)。

摘　　要：矿浆中的Pb~(2+)会对闪锌矿的浮选行为产生较大影响,因此探究闪锌矿抑制剂对活化闪锌矿抑制效果,对于铅锌高效分离具有重要意义。拟通过单矿物浮选和人工混合矿浮选试验探究在丁基钠黄药(SIBX)体系下,铅离子对新型闪锌矿抑制剂羟基乙叉二磷酸(HEDP)抑制性能的影响,并通过Zeta电位、XPS和SEM表征手段探究HEDP在铅活化闪锌矿表面的吸附行为。单矿物浮选试验结果表明,HEDP在pH为8~11时能有效抑制铅活化闪锌矿的上浮,而几乎不影响方铅矿的浮选。人工混合矿试验结果表明,在矿浆pH=9、HEDP浓度100 mg/L、SIBX浓度20 mg/L的条件下,方铅矿的回收率高达88.21%,而闪锌矿的回收率仅有9.47%。SEM、Zeta电位和XPS分析结果表明,HEDP会与闪锌矿表面的活化产物羟基铅作用,化学吸附在被铅离子活化的闪锌矿表面,进而阻止丁基钠黄药(SIBX)在闪锌矿表面的吸附。The unavoidable ion Pb2+in the pulp have a great impact on the flotation behavior of sphalerite.Therefore,it is important for the efficient separation of sphalerite and galena to understand the depression effect of sphalerite depressant on Pb2+activated sphalerite.The influence of lead ion on the depressant performance of 1-hydroxyethylidene-1,1-diphosphonic acid(HEDP)in the butyl sodium xanthate(SIBX)system was investigated,and the adsorption behavior of HEDP on the surface of Pbactivated sphalerite by Zeta potential,XPS and SEM analysis was explored.The results of single mineral flotation tests showed that HEDP can effectively depress the flotation of Pb-activated sphalerite in the pH range of 8to 12,but it did not affect the flotation of galena.The test results of artificial mixed ore showed that,under the conditions of pulp pH=9,HEDP concentration of 100mg/L and SIBX concentration of 20mg/L,the recovery of galena was as high as 89%,while the recovery of sphalerite was only 15%.The results of SEM analysis,Zeta potential and XPS analysis proved that HEDP could react with the product of Pb-activation Pb—OH and chemisorbed on Pb-activated sphalerite surface,the adsorption of HEDP on Pb-activated sphalerite impeded the adsorption of SIBX.

关 键 词：铅锌分离 铅离子 抑制剂 闪锌矿 方铅矿 

分 类 号：TD923[矿业工程—选矿] TD952