(1.湘潭大学 化工学院，湘潭 411105；
2.中南大学 矿物工程系，长沙 410083)
摘 要: 高碱度矿浆中含钙矿物表现出不同的可浮性，其变化趋势为白钨矿＞方解石＞萤石，白钨矿可浮性好而萤石可浮性差。在高NaOH用量下实验室和工业试验均可实现白钨矿与萤石的浮选分离。捕收剂在矿物表面的吸附量测定表明，在高碱度矿浆中，捕收剂在白钨矿表面吸附牢固而在萤石表面吸附很差；Zeta电位测定表明，高碱度下白钨矿与萤石均荷负电，由于电荷间相互斥力使白钨矿与萤石处于分散状态，从而实现白钨矿与萤石的浮选分离。
关键字: 可浮性；含钙矿物；高碱度；浮选分离
higher alkalinity pulp
（1. Chemical Engineering College，
Xiangtan University，Xiangtan 411105，China;
2.Department of Mineral Engineering，
Central South University，Changsha 410083，China）
Abstract:Calcium minerals display different flotation behaviors in higher alkalinitypulp，and their floatabilitiesvary in the following order: scheelite>calcite>fluorite. Scheelite is floated well and fluorite worse. The separation of scheelite from fluorite was achieved in the absent of any depressant in bench scale studies and pilot plant tests. The measurements of adsorption of sodiumoleate on minerals show that in higher alkalinity pulp the collector can be adsorb ed strongly on scheelite but weakly on fluorite，and the measurements of zeta potential indicate that electronegative scheelite and fluorite can be dispersed by the influence of electrostatic repellency force.
Key words: floatability; calcium minerals; alkalinity; se paration
