摘要：选取大理石和白云石粉为材料, 测试其不同粉磨时间的粒径分布, 计算勃氏比表面积;粒径分布模型采用RosinRammler-Bennet (RRB) 方程进行拟合, 运用粉磨动力学和线性回归方法分析粉磨过程石粉的特征粒径、均匀性系数和比表面积。结果表明:随粉磨时间增加, 粒径为010μm的颗粒逐渐增加, 大于10μm的颗粒逐渐减少, 两者粉磨效率随时间增加逐渐减小;相同时间时, 大理石粉的高于白云石粉的;随时间增加, 大理石粉均匀性系数增大, 颗粒集中现象增多, 白云石粉则相反;两者的比表面积和特征粒径与其粉磨时间呈对数和双对数相关。
关键词：石粉；粒径分布；特征粒径；均匀性系数
Abstract：Ground marble and dolomite were chosen as the materials to test the particle size distribution under different grinding time, and the Blaine specific surface area was calculated.The characteristic particle size, uniformity coefficient and specific surface area were determined by means of grinding dynamics and linear regression analysis using Rosin-Rammler-Bennet (RRB) equation as the particle size distribution model. The results show that with the increase of grinding time, the number of the particles in the range of 010 μm gradually increases, the number of particles larger than 10 μm gradually decreases. The grinding efficiency decrease gradually with the time, and ground marble has a higher grinding efficiency than ground dolomite at the same time. The uniformity coefficient of ground marble increases, and the particle concentration phenomenon enhances, however, the uniformity coefficient of ground dolomite decreases, and the particle concentration phenomenon weakens. There exist logarithmic and double logarithmic correlations between the specific surface area and characteristic particle diameter of the two particles.
Keywords: ground stone；particle size distribution；uniformity coefficient；characteristic particle size
