陶瓷干法造粒过程坯料颗粒成形与雾化液含量的影响

发布时间：2018-05-08 17:11

  本文选题：干法造粒制粉 + 欧拉-欧拉双流体模型　； 参考：《人工晶体学报》2017年08期

【摘要】：为研究陶瓷干法造粒制粉过程坯料颗粒成形与雾化液含量的关系,基于欧拉-欧拉双流体模型模拟干法造粒制粉过程坯料颗粒与雾化液混合过程,同时对坯料颗粒流动性、颗粒级配及粗糙度进行实验分析,验证数值模拟结果正确性。仿真结果表明:当雾化液含量分别为100 m L、200 m L、300 m L时,坯料颗粒在造粒室内的分散性无明显差异,团聚现象不明显;当雾化液含量分别为400 m L、500 m L时,坯料颗粒在造粒室内的分散性有明显变化,团聚现象显著。实验结果表明:当雾化液含量分别为100 m L、200 m L、300 m L、400 m L、500 m L时,坯料颗粒的流动性指数依次为63.5%、83.0%、90.0%、77.0%、61.0%,有效坯料颗粒百分比依次为72%、83%、90%、82%、65%,粗糙度系数平均值依次为1.38、1.43、1.26、1.49、1.57。综合分析说明:数值仿真与实验结果基本相吻合,造粒过程中雾化液含量为300 m L时,干法造粒制粉过程造粒室内坯料颗粒的分散性较好,且基本无团聚现象;坯料颗粒的流动性最佳、颗粒级配最均匀、粗糙度整体最优,即造粒效果最好。
[Abstract]:In order to study the relationship between billet particle forming and atomizing liquid content during dry granulation of ceramic powder, the mixing process of billet particle and atomizing liquid during dry granulation process was simulated based on Euler-Euler dual fluid model, and the fluidity of billet particle was also studied. Particle gradation and roughness were analyzed experimentally to verify the correctness of the numerical simulation results. The simulation results show that there is no obvious difference in dispersion and agglomeration of billet particles in the granulation chamber when the atomization liquid content is 100 mL / L and 200 mL / L respectively, and when the atomizing liquid content is 400 mL / L, the agglomeration phenomenon is not obvious. The dispersion and agglomeration of billet particles in granulation chamber are obvious. The experimental results show that the fluidity index of the billet grain is 63.5%, 83.0% and 77.0% respectively when the atomization liquid content is 100 mL / 200 m / L and 400 m / L / L, respectively, and the percentage of effective blank particles is 728390,822665mm, and the average roughness coefficient is 1.38 / 1.431.261.49m / 1.57. The comprehensive analysis shows that the numerical simulation is basically consistent with the experimental results. When the atomization liquid content is 300 mL, the dispersion of the indoor billets in the dry granulation process is better, and there is basically no agglomeration. The flowability of the billet is the best, the particle gradation is the most uniform, and the roughness is the best, that is, the granulation effect is the best.
【作者单位】： 景德镇陶瓷大学机械电子工程学院;
【基金】：国家自然科学基金(51365018) 江西省高等学校科技落地计划(KJLD14074) 江西省科技支撑计划(20151BBE50041)
【分类号】：TQ174.6
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本文编号：1862278