【摘要】 研究了卧式行星磨中研磨体形状对矿渣的破碎速率、初始破碎分布函数和粒度分布规律的影响,实验所用研磨体为Φ20mm的钢球和Φ20mm×20mm的钢锻,物料为(-3.35+2.36)mm粒级的矿渣。研究结果表明,不同形状的研磨体对矿渣的粉磨遵循一级粉磨动力学方程,Φ20mm×20mm钢锻的破碎速率Si明显高于Φ20mm钢球的破碎速率;初步研究认为研磨体形状对初始破碎分布参数的影响较大;粉磨时间较短(3min以前),Φ20mm×20mm钢锻粉磨产品的筛下量高于Φ20mm钢球的筛下量,延长粉磨时间至4min,两种形状研磨体粉磨矿渣的不同粒级的筛下量相当。更多还原

【Abstract】 The objective of this study is to investigate the effect of grinding media shapes on breakage parameters of slag in a planetary mill.The grinding media used for the tests were Φ20mm balls and Φ20mm×20mm cylinders.Feed size was(-3.35+2.36)mm monosize fractions.The specific rates of breakage,primary breakage distribution function and particle size distribution were compared for different shape grinding media.Result shows that slag obeys first-order breakage kinetics of different shape grinding media.The specific rates of breakage Si of Φ20mm×20mm cylinders is more higher than that of Φ20mm balls.The grinding media shape has significant effect on the primary breakage distribution parameters.It is found that Φ20mm×20mm cylinders produce more fines at shorter grin-ding periods(0.5~3min).On the other hand,for longer grinding time(4min) the amounts of undersize material obtained by using Φ20mm balls and Φ20mm×20mm cylinders are almost the same.更多还原