(中南大学 资源加工与生物工程学院，长沙 410083)
摘 要: 通过单矿物浮选试验、ζ电位、吸附量测定及扫描电镜研究水玻璃对Ca2+存在体系下菱锌矿与石英浮选分离的机理。结果表明：pH为9.5~11时，Ca2+可以显著活化石英的浮选，并使水玻璃对菱锌矿的抑制作用增强，严重影响二者的分离；改变添加剂添加顺序，在矿浆中优先加入水玻璃，可以有效防止Ca2+在矿物表面的吸附，使捕收剂在矿物表面的吸附量差异增大，从而消除Ca2+对菱锌矿与石英浮选分离的影响。
关键字: 菱锌矿；石英；水玻璃；浮选；Ca2+
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The mechanism of flotation separation of water glass on smithsonite and quartz in presence of Ca2+ was investigated through flotation tests, Zeta potential measurements, adsorption measurements and SEM-EDAX. The results show that Ca2+ can remarkably activate the flotation performance of quartz in pH range of 9.5−11. Meanwhile, the inhibition of water glass on smithsonite is strengthened, which can seriously affect the separation of smithsonite and quartz. When the adding order of reagents is changed by setting water glass preferentially into the ore pulp, the adsorption of Ca2+ on the minerals surface can be hindered effectively, which increase the variance of adsorption capacity of sodium oleate on the minerals surface. Then, the effect of calcium ion on flotation of smithsonite and quartz can be eliminated.
Key words: smithsonite; quartz; water glass; flotation; Ca2+
