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针对锡石多金属硫化矿磨矿实践中存在的锡石过磨和硫化矿欠磨问题,在研究磨矿产物粒度特征的基础上,提出磨矿目标粒度产率,以磨矿浓度和磨矿时间为自变量,利用MATLAB软件分别建立了锡石和硫化矿磨矿目标粒度产率预测模型,结果表明:入磨粒度为-3 mm、浓度为65%、磨矿时间为6min时,磨矿产物粒度分布符合A.M.高丁数学模型,拟合决定系数为0.9957;不同磨矿时间下磨矿产物粒度分布符合磨矿动力学模型,拟合决定系数为0.900;通过数学极值分析,求出锡石和硫化矿的磨矿目标粒度产率极大值分别为29.11%和31.13%,极值点分别为(60.38%,2.837)和(38.43%,7.202)。
Aiming at the over-grinding of cassiterite and sulphide ore in the practice of cassiterite polymetallic sulphide ore grinding, and on the basis of studying the characteristics of the particle size of the grinding product, the grain-size yield of grinding is proposed. The grinding concentration and grinding Time was used as independent variable. The prediction model of particle size production rate of cassiterite and sulphide ore was set up respectively by MATLAB software. The results showed that when the grinding particle size is -3 mm, the concentration is 65% and the grinding time is 6 min, The particle size distribution conforms to the mathematical model of AMG and the fitting coefficient is 0.9957. The particle size distribution of grinding product accords with the grinding kinetics model under different grinding time, the fitting coefficient is 0.900. By mathematical extreme analysis, Sulfide ore has the maximum grain size of grinding targets of 29.11% and 31.13%, respectively. The extreme points are (60.38%, 2.837) and (38.43%, 7.202) respectively.