微细粒高岭石对菱锌矿浮选的影响研究  

Research of Ultrafine Kaolinite Affecting the Flotation of Smithsonite

作　　者：欧乐明[1] 吕兵超 冯其明[1] 张国范[1] 

机构地区：[1]中南大学资源加工与生物工程学院,长沙410083

出　　处：《有色金属（选矿部分）》2016年第2期38-42,74,共6页Nonferrous Metals（Mineral Processing Section）

基　　金：国家重点基础研究发展计划(973计划)项目(2014CB643402)

摘　　要：通过浮选试验、沉降试验、矿相显微镜观察和接触角测定,研究了微细粒高岭石对菱锌矿浮选行为的影响机制。研究结果表明,少量微细粒高岭石的存在就会显著降低菱锌矿的回收率。主要原因是微细粒高岭石与菱锌矿发生了异相凝聚。在捕收剂作用下,高岭石具有较强的亲水性,而高岭石附着于菱锌矿表面,降低了菱锌矿的表观疏水性,从而降低了菱锌矿的回收率。增加捕收剂用量或者添加六偏磷酸钠均能有效改善菱锌矿的浮选。The mechanism of micro-granular kaolinite affecting the flotation of smithsonite was investigated through flotation tests,sedimentation tests,metallographic microscope photos and contact angle measurements. The results showed that the recovery of smithsonite can be significantly reduced by a few amount of kaolinites. This may mainly attribute to the hetero-aggregation. The surface hydrophilism of kaolinite is strong under the action of the collector,and the surface hydrophobicity of smithsonite decreases with the coverage of micro-granular kaolinite on smithsonite surface,which made the recovery of smithsonite reduce. The flotation behavior of smithsonite can be effectively improved by increasing collector dosage or by adding sodium hexametaphosphate（ SHMP）.

关 键 词：浮选 微细粒高岭石 菱锌矿 异相凝聚 

分 类 号：TD952.3[矿业工程—选矿] TD923