钠长石在蛇纹石与镍黄铁矿浮选分离中的作用  

Effect of Albite in the Flotation Separation of Serpentine and Pentlandite

作　　者：黄晨 卢冀伟[1] 袁致涛[1] 王志坚 HUANG Chen;LU Ji-wei;YUAN Zhi-tao;WANG Zhi-jian(School of Resources&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：《东北大学学报（自然科学版）》2023年第2期272-278,共7页Journal of Northeastern University(Natural Science)

基　　金：中央高校基本科研业务费专项资金资助项目(N2201010);国家自然科学基金资助项目(51704057,52174241).

摘　　要：针对蛇纹石易与镍黄铁矿形成异质凝聚而影响其浮选分离的问题,提出添加钠长石改善镍黄铁矿和蛇纹石浮选分离效果并研究钠长石的影响机制.单矿物及人工混合矿浮选试验结果表明,添加钠长石后镍黄铁矿的浮选回收率可从44%提高至81%,表明钠长石的添加削弱了蛇纹石与镍黄铁矿之间的异质凝聚,并增强了镍黄铁矿的可浮性.浊度测量、Zeta电位测试、SEM-EDS测试、吸附量测试以及DLVO理论计算结果表明,钠长石在特定pH条件下荷强负电,且负电性强于镍黄铁矿,更易与荷正电的蛇纹石颗粒通过静电引力形成异质凝聚,从而减弱了蛇纹石在镍黄铁矿表面的黏附,改善了镍黄铁矿的可浮性,使镍黄铁矿可浮性得以提升、回收率大幅提高,进而实现其与蛇纹石的有效分离.Because serpentine is easy to form heterogeneous agglomeration with pentlandite thus affecting its flotation separation,the addition of albite was proposed to improve the flotation separation effect of pentlandite and serpentine.The influence mechanism of albite was studied.The results of flotation show that the flotation recovery of pentlandite increases from 44%to 81%after the addition of albite,which indicates that the addition of albite can weaken the heterogeneous agglomeration between serpentine and pentlandite,thus can enhance the floatability of pentlandite.The results of turbidity measurement,Zeta potential test,SEM-EDS test,adsorption capacity test and DLVO theoretical calculation show that the albite is strongly negative charged under certain pH conditions than that of the pentlandite.It is easier to form heterogeneous agglomeration between albite and serpentine,thus weakening the adhesion of serpentine on the surface of pentlandite.The research results may be used in improving the floatability of pentlandite and increasing the recovery of pentlandite,so as to effectively separate serpentine from pentlandite.

关 键 词：镍黄铁矿 蛇纹石 钠长石 静电相互作用 异质凝聚 

分 类 号：TP20[自动化与计算机技术—检测技术与自动化装置]