(中南大學 資源加工與生物工程學院，長沙 410083)
摘 要: 通過單礦物浮選試驗、ζ電位、吸附量測定及掃描電鏡研究水玻璃對Ca2+存在體系下菱鋅礦與石英浮選分離的機理。結(jié)果表明：pH為9.5~11時，Ca2+可以顯著活化石英的浮選，并使水玻璃對菱鋅礦的抑制作用增強，嚴重影響二者的分離；改變添加劑添加順序，在礦漿中優(yōu)先加入水玻璃，可以有效防止Ca2+在礦物表面的吸附，使捕收劑在礦物表面的吸附量差異增大，從而消除Ca2+對菱鋅礦與石英浮選分離的影響。
關(guān)鍵字: 菱鋅礦；石英；水玻璃；浮選；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+
