中文摘要：

以水和乙醇为液体介质，在一定的研磨条件下，对黄铁矿粉体粒度和矿浆粘度随研磨时间的变化进行了研究，并通过对黄铁矿粉体在水和乙醇中的润湿性、ζ电位、分散性的测定和扩展双电层（EDLVO）理论计算，分析了引起这些变化的原因。结果表明：在超细湿磨过程中，矿浆粘度适当时，才会获得较高的研磨效率；液体介质对粉体颗粒的界面作用影响很大，而粉体颗粒的界面作用决定了研磨过程中矿浆粘度的大小，从而影响研磨效率。

英文摘要：

With ethanol or water as liquid medium, the changes of particle size and slurry viscosity of pyrite powder with the grinding time on the same grinding condition were studied. The possible reasons were analyzed by the measurements of wettability, zeta potential, dispersibility of pyrite in water and ethanol and by the calculation of EDLVO theory. The results show that higher grinding efficiency can be obtained at an appropriate slurry viscosity in the ultrafine grinding process. Liquid medium may change the interface interaction of particles that predominates the slurry viscosity and thus the grinding efficiency.