摘要
为研究深海矿石输送设备的工作性能,提出矿浆分离效率和矿石储集效率这2个评价指标,运用计算流体力学理论和Fluent仿真软件对矿石输送设备三维流场模型内固液两相流进行模拟仿真,研究进料流量、颗粒体积分数、颗粒粒径和活塞行程对这2个评价指标的影响。研究结果表明:进料流量越小,矿浆分离效率和矿石储集效率越大;随着颗粒体积分数增大,矿浆分离效率减小幅度不大,矿石储集效率先增加后减小,存在1个最优体积分数,粒径越小,最优体积分数越小;矿浆分离效率随颗粒粒径的增大而增大,当颗粒粒径增大到25mm后,矿浆分离效率上升幅度很小;矿石储集效率先随颗粒粒径的增大而增大,当颗粒粒径增大到20mm后,矿石储集效率大幅度下降;矿石储集效率随活塞行程的增大先大幅度上升,随后趋于平稳,而活塞行程对矿浆分离效率影响不大。
To study the working performance of deep-sea ore transporting equipment,two evaluation indexes i.e.,slurry separation efficiency and ore storage efficiency,were proposed.The three-dimensional flow field model of ore transporting equipment was established by using computational fluid dynamics theory and Fluent simulation software. The two-phase flow was simulated to study the effects of feed flow rate is,volume fraction,particle size and piston stroke on the two indexes.The results show that the smaller the feed flow rate,the greater the pulp separation efficiency and the ore storage efficiency are.As the particle volume fraction increases,the pulp separation efficiency decreases little,and the ore storage efficiency increases first and then decreases.There is an optimal volume fraction,and the smaller the particle size is,the smaller the optimal volume fraction is.The separation efficiency of the pulp increases with the increase of the particle size,and the value increases slightly after increasing to 25 mm.The ore storage efficiency increases with the increase of the particle size.When the particle size increases to 20 mm,the efficiency decreases sharply.The ore storage efficiency increases sharply with the increase of the piston stroke,and the piston stroke has little effect on the slurry separation efficiency.
作者
徐海良
饶星
杨放琼
XU Hailiang;RAO Xing;YANG Fangqiong(School of Mechanical and Electrical Engineering,Central South University,Changsha 410083,China;State Key Laboratory of High Performance Complex Manufacturing,Central South University,Changsha 410083,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第7期1567-1574,共8页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51775561)
湖南省自然科学基金资助项目(2018JJ2522)~~
关键词
矿石输送设备
固液两相流
模拟仿真
工作性能
ore transporting equipment
solid-liquid two-phase flow
simulation
working performance
