(1.湘潭大學(xué) 化工學(xué)院，湘潭 411105；
2.中南大學(xué) 礦物工程系，長沙 410083)
摘 要: 高堿度礦漿中含鈣礦物表現(xiàn)出不同的可浮性，其變化趨勢為白鎢礦＞方解石＞螢石，白鎢礦可浮性好而螢石可浮性差。在高NaOH用量下實驗室和工業(yè)試驗均可實現(xiàn)白鎢礦與螢石的浮選分離。捕收劑在礦物表面的吸附量測定表明，在高堿度礦漿中，捕收劑在白鎢礦表面吸附牢固而在螢石表面吸附很差；Zeta電位測定表明，高堿度下白鎢礦與螢石均荷負(fù)電，由于電荷間相互斥力使白鎢礦與螢石處于分散狀態(tài)，從而實現(xiàn)白鎢礦與螢石的浮選分離。
關(guān)鍵字: 可浮性；含鈣礦物；高堿度；浮選分離
higher alkalinity pulp
LI Long-feng2
（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
