(中南大学 资源加工与生物工程学院，长沙 410083)
摘 要: 为了解决铝土矿反浮选中微细粒浮选的难题，设计出一种旋流浮选器，利用流体动力学理论，通过模拟计算，建立旋流浮选器中铝土矿的分离粒度模型，推导出旋流浮选器应用于铝土矿反浮选的理论依据。对河南某铝土矿进行旋流浮选器浮选实验研究。结果表明：通过优化调整旋流浮选器的条件参数，不预先脱泥直接进行铝土矿反浮选，最终获得满足拜耳法对铝土矿生产要求的一水硬铝石精矿，精矿中平均A/S为8.38，回收率为85.16%。
关键字: 铝土矿；反浮选；旋流浮选器；分离粒度
reverse flotation of bauxite
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:In order to resolve the problem of fine particle flotation in the reverse flotation of bauxite, a new type of air-sparged hydrocyclone was designed, through accurate analog computation based on hydrodynamics theory. The theoretical foundation was deducted for the application of air-sparged hydrocyclone in the bauxite reverse flotation. The flotation tests of air-sparged hydrocyclone aiming at a bauxite from Henan province were studied. The results show that a diaspore concentrate directly used in the Bayer-mineral processing method can be obtained by optimizing the parameters of the hydrocyclone without pre-desliming. The average A/S of the concentrate is 8.38 with a recovery rate of 85.16%.
Key words: bauxite; reverse flotation; air-sparged hydrocyclone; separation size
