椭圆型混合器内二元颗粒径向混合

发布时间：2018-03-31 22:04

  本文选题：椭圆型混合器　切入点：二元颗粒　出处：《中国有色金属学报》2017年04期

【摘要】：采用实验和理论分析方法,以Lacey混合指数作为混合评价指标,研究转速、填充率对椭圆型混合器内二元颗粒在滚落运动模式下径向混合的影响。结果表明:在波动混合阶段,椭圆型混合器的离心率影响颗粒的混合稳定性;同一工况下,椭圆型混合器在竖直位置和水平位置的颗粒动态休止角相等;填充率一定时,动态休止角随转速的增大而增大;填充率不大于1/2、转速一定时,同一位置的活动层自由下滑面长度随填充率的增大而增大;同一工况下,椭圆型混合器在竖直位置时的活动层面积大于水平位置时;位置一定时,活动层面积随填充率增大而减小,随转速增大而增大;当转速不变,颗粒的混合程度随填充率减小而提高。
[Abstract]:The effects of rotational speed and filling rate on the radial mixing of binary particles in an elliptical mixer in rolling motion mode were studied by using Lacey mixing index as the mixed evaluation index and the experimental and theoretical analysis methods. The results show that in the phase of wave mixing, the effect of rotating speed and filling ratio on the radial mixing of binary particles in the elliptical mixer is studied. The centrifugal rate of the elliptical mixer affects the mixing stability of particles, the dynamic angle of repose of the elliptic mixer is equal at the vertical and horizontal positions under the same working condition, and the dynamic angle of repose increases with the increase of the rotational speed when the filling ratio is constant. When the filling rate is less than 1 / 2, the length of free sliding surface of the active layer in the same position increases with the increase of the filling rate, and the active layer area of the elliptic mixer in the vertical position is larger than that of the horizontal position under the same working condition, and when the position is fixed, the free sliding surface length of the active layer in the same position increases with the increase of the filling rate. The active layer area decreases with the increase of filling rate and increases with the increase of rotational speed, and the mixing degree of particles increases with the decrease of filling rate when the rotational speed is constant.
【作者单位】： 东北电力大学能源与动力工程学院;中国大唐集团科学技术研究院有限公司;
【基金】：教育部长江学者和创新团队发展计划(IRT13052) 吉林省自然科学基金资助项目(20150101033JC) 吉林市科技计划项目(201464044) 吉教科合字资助的课题(2015-237)~~
【分类号】：TQ027.1
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本文编号：1692644