陶瓷墙地砖干法制粉坯料颗粒与主轴转速分析

Relationship between the Blank Particles and the Spindle Speed of Dry Granulation for Ceramic Tile Production

为分析陶瓷墙地砖干法造粒过程坯料颗粒与主轴转速的关系,以黏土、长石、石英等为造粒原料,采用陶瓷墙地砖干法造粒设备制备坯料颗粒,基于主轴转速的改变,分析坯料颗粒流动性及有效颗粒百分比与主轴转速的关系,同时数值仿真验证实验结果正确性。实验结果表明:当主轴转速分别为2500 RPM、2700 RPM、2900 RPM、3100 RPM、3300 RPM时,坯料颗粒的流动性指数依次为58.0、68.0、80.5、74.0、67.0,有效颗粒百分比依次为81.5%、83.1%、88.0%、86.4%、83.9%。数值仿真表明:当主轴转速分别为2500 RPM、2700 RPM、2900 RPM、3100 RPM、3300 RPM时,造粒室底部坯料颗粒最大堆积密度依次为0.40、0.36、0.32、0.36、0.36。综合分析说明:当主轴转速为2900 RPM时,坯料颗粒流动性最好,有效颗粒百分比最优,此时造粒效果最佳。

In order to analyze the relationship between blank particles and the spindle speed of dry granulation for manufacturing ceramic tiles, blank particles are prepared by granulation with dry granulation system for ceramic tiles production, using clay, feldspar, quartz, etc. as raw materials. Then the relationship of the particles’ mobility and the percentage of effective particles with the spindle speed is analyzed, and numerical simulation is carried out to verify the validity of the experimental results. The experimental results show that when the spindle speeds are 2500 RPM, 2700 RPM, 2900 RPM, 3100 RPM and 3300 RPM, the mobility indexes of the blank particles are 58, 68, 80.5, 74 and 67, and the percentages of effective particles are 81.5%, 83.1%, 88%, 86.4% and 83.9%. The numerical simulation shows that when the spindle speeds are 2500 RPM, 2700 RPM, 2900 RPM, 3100 RPM and 3300 RPM, the maximum packing densities of blank particles at the granulating chamber bottom are 0.40, 0.36, 0.32, 0.36 and 0.36. The comprehensive analysis shows that when the spindle speed is 2900 RPM, the mobility of the blank particles is the highest, the percentage of effective particles is optimal, and the granulation result is the best.