搅拌磨中研磨介质大小对氧化锌超细研磨的影响

采用2种直径分别为0.4⁰.6、0.80.6、0.8¹.0 mm的氧化锆球,研究研磨介质大小对湿法研磨过程中氧化锌粒径的影响,并利用粉磨动力学模型分析研磨过程中的破碎机理。结果表明,采用直径为0.41.0 mm的氧化锆球,研究研磨介质大小对湿法研磨过程中氧化锌粒径的影响,并利用粉磨动力学模型分析研磨过程中的破碎机理。结果表明,采用直径为0.4⁰.6 mm的研磨介质研磨30 min时,氧化锌粒径可达到最小,即d50为0.9μm,d90为2.41μm;研磨介质直径为0.40.6 mm的研磨介质研磨30 min时,氧化锌粒径可达到最小,即d50为0.9μm,d90为2.41μm;研磨介质直径为0.4⁰.6 mm时的破碎速率明显大于直径为0.80.6 mm时的破碎速率明显大于直径为0.8¹.0 mm时的破碎速率,且破碎颗粒分布在较小的粒径范围内;在研磨过程中冲击破碎和摩擦破碎同时存在,研磨介质直径为0.41.0 mm时的破碎速率,且破碎颗粒分布在较小的粒径范围内;在研磨过程中冲击破碎和摩擦破碎同时存在,研磨介质直径为0.4⁰.6 mm时摩擦破碎的比例大于直径为0.80.6 mm时摩擦破碎的比例大于直径为0.8¹.0 mm时的比例。

Effect of Grinding Media Diameter on Fine Milling of Zinc Oxide Particles in Stirred Mill

To investigate the effect of grinding media diameter on zinc oxide particle size in stirred mill,grinding media with diameters from 0.4 to 0.6 mm and 0.8 to 1.0 mm were selected.Breakage mechanisms were analyzed using grinding kinetics model.The results show that grinding with mediadiametersfrom0.4to0.6mmfor30min,theminimumparticlesizeof zincoxidecanbeachieved,i.e.d50is0.9μmandd90is2.41μm.Thebreakage rate ofzinc oxide particles grinded with media diameters from 0.4 to 0.6 mm is obviously greater than that of 0.8 to 1.0 mm.The breakage products distribute in small diameter size range.The abrasion and fracture coexist duringthegrindingprocess.Usingmediadiametersfrom0.4 to 0.6 mm,the breakage proportion caused by abrasion is greater than using those of 0.8 to 1.0 mm.