助磨剂丙三醇和焦磷酸钠对石英磨矿动力学参数的影响

Effects of Grinding Aids Glycerol and Sodium Pyrophosphate on Kinetic Parameters of Quartz Grinding

采用批次湿式球磨试验,系统研究了丙三醇和焦磷酸钠两种助磨剂对0.074~2 mm石英纯矿物磨矿动力学行为的影响.基于磨矿产品粒度分布特征,建立了石英磨矿过程的m阶磨矿动力学模型,分析了助磨剂的质量分数对石英单粒级的动力学参数和磨矿速度的影响规律.结果表明:石英磨矿过程符合m阶磨矿动力学模型,随丙三醇和焦磷酸钠质量分数的增加,动力学参数k先减小后增大,动力学参数m先增大后减小,助磨剂的质量分数为0.3%~0.5%时达到最大值;在相同磨矿条件下,0.45~1 mm粒级的磨矿速度最大.

The effects of two grinding aids,glycerol and sodium pyrophosphate,on the grinding kinetic behavior of 0.074~2 mm quartz pure mineral in the material were systematically investigated by using batch wet ball milling experiments.Based on the grain size distribution characteristics of grinding products,m order grinding kinetic models of quartz in the grinding process were established.The influence of the amount of grinding aid on the kinetic parameters and grinding speed of quartz was analyzed.The results show that the quartz grinding process conformes to the m order grinding dynamics model.With the increase of the dosage of glycerol and sodium pyrophosphate,the kinetic parameter k decreases first and then increases,and the kinetic parameter m increases first and then decreases.The maximum value is reached when the dosage of grinding aids is 0.3%~0.5%.Under the same grinding conditions,the grinding speed of 0.45~1 mm particle size is the maximum.