颗粒物料在半封闭式回转鼓内的混合特性

doi:10.16085/j.issn.1000-6613.2017-1360

化工进展 ›› 2018, Vol. 37 ›› Issue (05): 1687-1691.DOI: 10.16085/j.issn.1000-6613.2017-1360

颗粒物料在半封闭式回转鼓内的混合特性

刘义伦^1,2, 伍天翔¹, 赵先琼¹, 刘思琪¹, 苏家辉¹

1 中南大学机电工程学院, 湖南长沙 410083;
2 中南大学轻合金研究院, 湖南长沙 410083

收稿日期:2017-07-04 修回日期:2017-10-22 出版日期:2018-05-05 发布日期:2018-05-05
通讯作者: 刘义伦(1955-),博士,教授,从事散体颗粒物质的传热传质机理研究。
作者简介:刘义伦(1955-),博士,教授,从事散体颗粒物质的传热传质机理研究。E-mail:liuyiluncsu@sina.com。
基金资助:
国家自然科学基金（51375500）、长沙市科技计划重点项目（K1508090-11）及中南大学研究生创新项目（2016zzts310）。

Mixing characteristic of granular materials in semi-closed rotary drum

LIU Yilun^1,2, WU Tianxiang¹, ZHAO Xianqiong¹, LIU Siqi¹, SU Jiahui¹

1 College of Mechanical and Electrical Engineering, Central South University, Changsha 410083, Hunan, China;
2 Light Alloy Research Institute, Central South University, Changsha 410083, Hunan, China

Received:2017-07-04 Revised:2017-10-22 Online:2018-05-05 Published:2018-05-05

摘要/Abstract

摘要： 采用DEM离散单元法，对不同转速与倾角下半封闭式回转鼓内颗粒物料的混合过程进行了模拟。通过“颗粒接触数”定义的分离指数S，分析了不同转速和倾角对回转鼓内颗粒物料径向与轴向混合特性的影响。结果表明：转速与倾角对回转鼓内颗粒物料径向与轴向混合特性有显著的影响；倾角不变，转速分别为15r/min、30r/min、45r/min时，颗粒物料的径向与轴向混合速度随转速的增加而增加，当转速超过30r/min后，增加转速对径向与轴向混合速度的影响越来越小；转速不变，倾角分别为0°、17°、34°时，增大倾角能有效的增加轴向混合速度，但对径向混合速度没有促进作用，当倾角超过17°后，轴向混合速度的增幅随着倾角的增加而逐渐变小，而径向混合速度随着倾角的增大而减小，但增加转速可以减小径向混合速度下降幅度。

关键词: 回转鼓, 混合, 颗粒物料, 离散单元法, 模拟

Abstract: In semi-closed rotating drum under different rotating speeds and inclining angle,the mixing process of granular materials was simulated by using discrete element method (DEM),and the effects of radial and axial mixing characteristic of granular materials were analyzed by using segregation index S based on particle contact-numbers. The results showed that the rotating speed and inclining angle of rotary drum have significantly affected on the radial and axial mixing characteristic of granular materials. When the inclining angle is constant and the rotating speed is 15r/min,30r/min or 45r/min,respectively, the radial and axial mixing speed increase with the addition of rotating speed. The influence of raising rotating speed is smaller and smaller on the radial and axial mixing speed while the rotating speed is over 30r/min. When the rotating speed is constant and the inclining angle is 0°,17° or 34°,respectively, increasing inclining angle has an obviously promotion to the axial mixing speed,but it has never promoted to the radial mixing speed. When the inclining angle is over 17°,the growth rate of axial mixing is becoming smaller gradually,and the radial mixing speed is decreasing with the increase of inclining angle,but the decline of radial mixing speed will reduce with the increase of the rotating speed.

Key words: rotary drum, mixing, granular materials, discrete element method, simulation

中图分类号:

TQ027.1

刘义伦, 伍天翔, 赵先琼, 刘思琪, 苏家辉. 颗粒物料在半封闭式回转鼓内的混合特性[J]. 化工进展, 2018, 37(05): 1687-1691.

LIU Yilun, WU Tianxiang, ZHAO Xianqiong, LIU Siqi, SU Jiahui. Mixing characteristic of granular materials in semi-closed rotary drum[J]. Chemical Industry and Engineering Progress, 2018, 37(05): 1687-1691.

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颗粒物料在半封闭式回转鼓内的混合特性

Mixing characteristic of granular materials in semi-closed rotary drum

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