超细磨矿物矿浆温度和浓度与黏度相关性分析

Correlation Analysis of Viscosity with Temperature and Concentration of Ultrafine Mineral Slurry

以5~30μm石英与黄铁矿为研究对象,在不同温度、不同矿浆浓度条件下进行黏度试验,探究石英矿和黄铁矿在超细磨条件下的黏度变化规律。结果表明,相同粒度条件下,石英和黄铁矿的黏度都随矿浆浓度增大而增大,粒度越细,黏度增幅越大,且石英黏度变化幅度比黄铁矿更明显;相同矿浆浓度条件下,石英和黄铁矿的黏度都随温度升高呈先降再升趋势,且粒度越细影响越显著。回归分析结果表明,石英和黄铁矿的黏度与矿浆浓度之间均符合指数拟合模型;在超细磨矿过程中,矿浆浓度不宜超过40%,矿浆温度宜控制在50℃左右,该参数条件有利于提高磨矿效率。

Pure quartz and pyrite minerals in the size range of 5-30μm were taken in an experiment on viscosity under different pulp temperature and concentration conditions,for investigating the viscosity variation law of ultrafine particles.The results show that the viscosity for both minerals within the same size range increases along with the increase of pulp concentration,and the finer the particle,the greater the increasing rate.Furthermore,the viscosity variation of quartz is more remarkable.With the same pulp concentration,the viscosity of both minerals displays a declining⁃ascending trend as the temperature rises,which is more significant for finer minerals.The regression analysis shows that the correlation between viscosity and concentration of quartz and pyrite slurry are in line with the exponential fitting model.According to this analysis,the pulp concentration for ultrafine grinding should not exceed 40%and the optimum pulp temperature should be regulated at 50℃,which is beneficial for improving grinding efficiency.