油酸钠对一水硬铝石和高岭石的捕收机理

摘要

The floatability of diaspore and kaolinite using sodium oleate as collector was studied and the collection mechanism of sodium oleate on minerals was investigated. The collection is controlled by two factors. Chemical reaction plays an important role during pH4～7, and on the other side, forming ion-molecular association is dominant factor during pH 7～10. Using sodium oleate as collector, the different floatability of diaspore and kaolinite results from the different amount of active Al3+ on the surface of minerals, which offers theoretics foundation for desilicate of bauxite by floatation.%用油酸钠为捕收剂， 研究了一水硬铝石和高岭石的可浮性， 并对捕收剂与矿物的作用机理进行了探讨， 结果表明： 油酸钠对一水硬铝石和高岭石的捕收主要由两方面因素控制， 在pH 4～7范围内， 为化学反应起主要作用， 在pH 7～10以形成离子-分子缔合物为主要因素； 在以油酸钠为捕收剂时， 矿物表面活性Al3+ 数量的不同导致了高岭石和一水硬铝石的可浮性差异， 这为铝土矿正浮选脱硅提供了理论依据。