在相同的球磨条件下,对4种窄粒级的绿泥石进行实验室分批湿式球磨试验.结果表明:4种粒级绿泥石的磨矿动力学都遵循一阶磨矿动力学,球磨0.25~0.5 mm的绿泥石时获得最大的破碎速率函数Si=0.35 min?1,正常的破碎粒级范围应该小于0.5 mm;在较短的磨矿时间内,0.25~0.5 mm绿泥石的细粒级产出具有明显的零阶产出特征;采用G-H算法获得0.25~0.5 mm粒级绿泥石的累积破碎分布函数Bij,利用磨矿总体平衡动力学模型,对粒级为0.25~0.5 mm的绿泥石进行球磨模拟仿真计算,试验结果与模拟仿真结果高度一致.%Under an invariant mill environment, batch wet ball grinding studies were carried out by grinding four mono-sized fractions of single mineral of chlorite. The results show that all mono-sized fractions of chlorite follow the first-order breakage mechanism. The maximum breakage rate for chlorite, obtained in the feed size fraction of 0.25?0.5 mm, is 0.35 min?1. The normal breakage behavior is obtained when the feed size is less than 0.5 mm. The fine fraction output for 0.25?0.5 mm size fractions of chlorite has a clear the zero-order output characteristics at a relatively short grinding time. The cumulative breakage distribution functions for 0.25?0.5 mm size fractions of chlorite are obtained using G-H algorithm. The simulated product size distribution data obtained,using the discrete-size, continuous-time Population Balance Model (PBM), are consistent with experimental data for 0.25?0.5 mm size fractions of chlorite.
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