• 论文
主办单位:煤炭科学研究总院有限公司、中国煤炭学会学术期刊工作委员会
基于矩阵PBM的煤粉超细粉碎过程研究
  • Title

    Investigation on the ultra-fine grinding of coals based on a matrix population balance model

  • 作者

    楚长青赵冰龙白雪涛吴昌宁翁力李国涛刘科

  • Author

    CHU Changqing1 ,ZHAO Binglong2 ,BAI Xuetao3 ,WU Changning1 ,WENG Li1 ,LI Guotao1 ,LIU Ke1,2,3

  • 单位

    南方科技大学 前沿与交叉科学研究院 清洁能源研究院(Energy-X)南方科技大学 创新创业学院南方科技大学 理学院

  • Organization
    1. Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen  518055,China; 2. School of Innovation and En-trepreneurship,Southern University of Science and Technology,Shenzhen  518055,China; 3. College of Science,Southern University of Science and Technology, Shenzhen  518055,China
  • Abstract
    The ultra-fine grinding kinetic model for pulverized coal based on the mechanism of grinding process can be used to predict the particle size distribution of the products in the grinding process,provide a guidance for optimizing the mill efficiency,and reduce the process energy consumption. It is very important for the preparation of ultra-clean coal powder with low ash content. In this paper,by using an orthogonal design of Taguchi plan,the effects of the physical parameters of different coals,the size of grinding medium and the specific load of pulverized coal on the ultra-fine grinding process are investigated by using a 1. 5 L vertical stirred ball mill in the laboratory. A mechanistic approach based model,matrix population balance model (M-PBM),is proposed to predict the particle size distribution of the ul- tra-fine grinding products by the stirred ball mill,and by combining the Rosin-Rammler particle size distribution mod- el,the particle size corresponding to any cumulative content under sieve can be accurately predicted. By range analy- sis,the influences of coal ash content,the size of grinding medium and the specific load of pulverized coal on the ener- gy consumption and specific flux of ultra-fine grinding are discussed. Based on the analysis of coal-ash dissociation process in the ultra-fine grinding of pulverized coal and by combining Tomoyoshi’s energy consumption formula rela- ting specific surface area of particles,the relationship between coal ash content and energy consumption is discussed, and the formulas relating coal ash content,grinding medium size,the specific load of pulverized coal with specific grinding flux and with energy consumption are further established. It is found that the particle size reduction during the ultra-fine wet grinding process of stirring ball mill conforms to the first-order linear kinetic hypothesis. Under a fixed rotating speed of agitating shaft and within the considered particle size reduction range,the ash content of coal has the greatest influence on the specific flux and energy consumption of the stirring ball mill. Within the ultrafine grinding size range which is below 10 μm (p50 ),the established formulas of specific flux and energy consumption show that the increase in ash content,decrease in grinding medium size (0. 3-1. 8 mm) and increase in the specific load of pulver- ized coal will lead to the decrease in energy consumption and increase in specific flux,respectively.
  • 关键词

    超细磨PBM模型超净煤粒度分布搅拌磨机

  • KeyWords

    ultra-fine grinding;PBM model;ultra-clean coal;particle size distribution;stirred ball mill

  • 基金项目(Foundation)
    广东省引进创新创业团队资助项目(2016ZT06N532);广东省深圳市南山区领航团队资助项目(LHTD20160003)
  • DOI
  • Citation
    CHU Changqing,ZHAO Binglong,BAI Xuetao,et al. Investigation on the ultra-fine grinding of coals based on a matrix population balance model[J]. Journal of China Coal Society,2019,44(6):1906 -1914.
  • 图表
相关问题

主办单位:煤炭科学研究总院有限公司 中国煤炭学会学术期刊工作委员会

©版权所有2015 煤炭科学研究总院有限公司 地址:北京市朝阳区和平里青年沟东路煤炭大厦 邮编:100013
京ICP备05086979号-16  技术支持:云智互联