Abstract: On the basis of sulphide ore flotation theory, the reagent system and process flow chart of separation of Pb, Zn and S minerals from kaolin tailings were studied. The result showed that galena and sphalerite were liberated from other minerals when the portion of particle sizes of <74 mm was 70%. Pb and Zn minerals could be separated better in the conditions of 30 g/t diethyldithiocarbamate, 1000 g/t ZnSO4 and 300 g/t Na2SO3. And Zn an S minerals could be separated better in the conditions of 300 g/t CuSO4 and 50 g/t sodium isobutylxanthate. Through the flow chart of ore grinding, initial flotation of lead minerals, and separation of zinc and S minerals, Pb concentrate with Pb grade of 64.55% and Pb recovery rate of 84.47%, and Zn concentrate with Zn grade of 45.04% and Zn recovery rate of 91.94% were obtained.

Key words: gaolin tailings, flotation, separation, Pb, Zn, S

摘要： 根据硫化矿浮选理论，研究了高岭土尾矿中铅锌硫矿物分离的药剂制度和工艺流程. 结果表明，方铅矿和闪锌矿在磨矿至粒度<74 mm颗粒占70%时单体基本解离，在捕收剂乙硫氮30 g/t、组合抑锌剂ZnSO4 1000 g/t及Na2SO3 300 g/t的药剂制度下铅锌矿物可有效分离；在捕收剂异丁黄药50 g/t、锌活化剂CuSO4 300 g/t的药剂制度下锌硫矿物可有效分离. 通过磨矿-优先浮铅-锌硫矿物分离的闭路流程，得到铅品位64.55%、回收率84.47%的铅精矿，锌品位45.04%、回收率91.94%的锌精矿.

关键词: 高岭土尾矿, 浮选, 分离, 铅, 锌, 硫