陶瓷干法制粉机搅拌轴偏心距对颗粒分散性的影响  

Effect of Mixer Shaft Eccentricity of Ceramics Dry Granulating Machine on Particles Dispersion

作　　者：吴南星[1] 廖达海[1] 占甜甜 

机构地区：[1]景德镇陶瓷学院机械电子工程学院,景德镇333403

出　　处：《硅酸盐通报》2014年第12期3300-3303,共4页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金资助(51365018)

摘　　要：针对陶瓷干法制粉机制粉过程中颗粒的分散性问题,基于双流体模型模拟分析制粉过程颗粒的分散性及实验验证模型的可靠性。鉴于陶瓷干法制粉机建立物理模型并通过CFD软件模拟制粉过程,模拟研究搅拌轴偏心距在制粉过程中对颗粒分散性的影响。模拟结果表明:当偏心距为20 mm、30 mm、40 mm时,颗粒的体积占造粒室体积依次为53%、54%、52.5%,分布在颗粒堆积密度为0.4 kg/m3以上范围内的颗粒体积占造粒室体积分别为10%、3%、6%,说明搅拌轴偏心距对整体颗粒的体积分布大小影响较小,但对堆积密度大的颗粒体积分布影响较大,且在搅拌轴偏心距为30 mm时颗粒的分散性最佳。同时模拟结果与实验数据趋势相吻合,验证了模型的可靠性,表明搅拌轴偏心距为30mm时制粉过程中颗粒的分散性最佳。Based on two-fluid model to analysis the particles fully dispersed problem in the process of ceramic dry granulating,and experiment has validated the reliability of the model. With the ceramic dry granulator establish physical model to simulate the granulating process and the influence of stirring shaft eccentricity on particle fully dispersion by CFD software. Simulation results show that when the eccentricity were 30 mm,40 mm,20 mm,the volume fraction of particles in the granulation chamber was 53%,54%,52. 5%,the volume fraction of particles which distribute in the area of packing density above 0. 4 kg / m^3 is 10%,3% and 6%,respectively. It shows that the size of particle size distribution has been less affected by stirring shaft eccentricity,but it has greatly effect on particle size distribution of large packing density. The dispersity of particles is best when the stirring shaft eccentricity is 30 mm.Simulation results matched with the experimental data which proved reliability of simulation model. When the mixer shaft eccentricity is 30 mm,particles dispersion is best in the granulation process.

关 键 词：干法制粉机 双流体模型 搅拌轴偏心距 颗粒分散性 

分 类 号：TQ174[化学工程—陶瓷工业]