EDTA二钠钙对十二胺体系中菱锌矿浮游性的影响  

Effect of EDTA Na_2-Ca on the Pelagic Activity of Smithsonite in Dodecylamine System

作　　者：张威 毕洪山 张津[1] 李国栋 郝海永 韩聪[1] 魏德洲[1] 沈岩柏[1] ZHANG Wei;BI Hongshan;ZHANG Jin;LI Guodong;HAO Haiyong;HAN Cong;WEI Dezhou;SHEN Yanbai(School of Resources and Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《矿产保护与利用》2018年第3期124-129,共6页Conservation and Utilization of Mineral Resources

基　　金：国家自然科学基金资助项目(51674067;51422402);中央高校基本科研业务费项目(N150101001;N160106004;N170106005)

摘　　要：通过单矿物浮选试验,研究了不同条件下乙二胺四乙酸二钠钙(EDTA二钠钙)对十二胺(DDA)体系中菱锌矿浮游性的影响规律。结果表明:当p H值在9.2~11.1范围时,EDTA二钠钙对硫化钠活化后的菱锌矿虽无捕收性,但能够增强十二胺对菱锌矿的捕收能力;EDTA二钠钙以40%的质量比取代十二胺并用于浮选菱锌矿时,可以获得比单独使用十二胺更好的浮选效果。浮选溶液化学计算、矿物溶解试验和动电位测试的结果表明,EDTA二钠钙通过促进菱锌矿表面Zn^(2+)的溶解来降低矿物表面的电位,从而提高菱锌矿的浮选回收率。The influence of ethylenediamine tetraacetic acid disodium calcium（ EDTA Na2-Ca）on the flotability of smithsonite in the dodecylamine（ DDA） cation flotation system was investigated by single-mineral flotation test. The results showed that EDTA Na2-Ca could not collect smithsonite activated by sodium sulfide,but could enhance the collecting ability of DDA at p H 9. 2 ~11. 1. The better flotation performance could be achieved when the mixed collector with 40% mass ratio of DDA replaced by EDTA Na2-Ca was used. The results of flotation solution chemical calculation,mineral dissolution tests,and dynamic potential tests showed that EDTA Na2-Ca significantly improved the flotation recovery of smithsonite by promoting the dissolution of Zn^2＋ on the smithsonite surface and reducing the potential of the mineral surface.

关 键 词：菱锌矿 十二胺 乙二胺四乙酸二钠钙 浮选 

分 类 号：TD923.14[矿业工程—选矿]