(中南大学 资源加工与生物工程学院，长沙 410083)
摘 要: 采用改进的Hallimond管结合电解浮选法研究不同粒级的高岭石浮选行为。考察矿物粒级、阴极孔径、电流强度对高岭石浮选速率的影响。通过数据分析建立了浮选速率常数k和这些影响因素的多元回归模型，并对回归方程和回归系数进行显著性检验。结果表明：对于不同粒级的高岭石，电解浮选速率均随电流强度的增大而增大；当电流强度相同时，细颗粒在孔径小的阴极时浮选速率较大，而粗颗粒在孔径大的阴极时浮选速率较大；浮选速率常数k与这些影响因素之间存在明显的线性相关关系。
关键字: 高岭石；电解浮选；浮选速率；气泡性质
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The electro-flotation of kaolinite particles with different size fractions were studied with modified Hallimond tube. The effects of particle size fraction, current intensity and aperture of mesh electrode on the flotation rate were studied. A regression model was established using the particle size fraction, current intensity and aperture of mesh electrode as independent variables and the flotation rate constant as dependent variable. The results show that the flotation rate increases with increasing current intensity. The flotation rate of the fine particle is higher at smaller aperture of mesh electrode under the same current intensity, while the case of the coarse particles is opposite. This shows that the bubble properties changed by electrolytic condition have notably significant effect on the kaolinite flotation.
Key words: kaolinite; electro-flotation; flotation rate; bubble properties
