COREX竖炉物料运动流型及瞬态特性的离散元模拟

doi:10.3969/j.issn.1005-3026.2015.09.017

东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (9): 1293-1297.DOI: 10.3969/j.issn.1005-3026.2015.09.017

COREX竖炉物料运动流型及瞬态特性的离散元模拟

周恒，游洋，罗志国，邹宗树

(东北大学多金属共生矿生态利用教育部重点实验室，辽宁沈阳110819)

收稿日期:2014-09-02 修回日期:2014-09-02 出版日期:2015-09-15 发布日期:2015-09-14
通讯作者: 周恒
作者简介:周恒(1988- )，男，湖南衡阳人，东北大学博士研究生; 邹宗树(1958- )，男，山东章丘人，东北大学教授，博士生导师.
基金资助:
“十二五”国家科技支撑计划项目(2011BAE04B02)；国家自然科学基金资助项目(51174053).

Discrete Element Simulation of Solid Flow Pattern and Transient Features of Burden Descending in COREX Shaft Furnace

ZHOU Heng， YOU Yang， LUO Zhi-guo， ZOU Zong-shu

Key Laboratory of Ecological Utilization of Multi-metallic Minerals of Education Ministry， Northeastern University， Shenyang 110819， China.

Received:2014-09-02 Revised:2014-09-02 Online:2015-09-15 Published:2015-09-14
Contact: ZOU Zong-shu
About author:-
Supported by:
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摘要/Abstract

摘要： 基于离散单元数值计算方法，建立COREX竖炉内物料颗粒尺度运动行为的数学模型，研究炉内物料运动流型及其瞬态特性，特别是颗粒的瞬态速度和瞬态应力分布.模拟结果表明:COREX竖炉内存在三种类型的流动区域:活塞流区、准停滞区以及沟流区.炉内颗粒的瞬态速度分布表明炉内存在两种类型的速度波:装料过程引发的向下传播的速度波和底部排料引发的向上传播的速度波.COREX竖炉内颗粒法向应力随时间的变化较小，竖炉底部导流锥顶部存在较强的应力区，而无导流锥竖炉底部中心存在较强应力区，沟流区的应力较弱.

关键词: COREX竖炉, 离散元法, 流型, 瞬态特性, 法向应力

Abstract: A mathematical model based on discrete element method (DEM) was developed to investigate the behaviors of solid particulate motion in a COREX shaft furnace model from particle-scale view. The solid flow pattern and transient features of burden were simultaneously analyzed， especially the transient behavior of velocity and stress distribution were calculated. The results showed that the solid flow in COREX shaft furnace can be divided into three different flow regions: plug flow zone， quasi-stagnant zone and converging flow zone. The transient behavior of velocity distribution indicates that there are two types of velocity waves in the furnace. One is a downward wave caused by charging and the other is upward from bottom caused by discharging. The normal stress has a minor change with time. A high stress field exists on the top of the guiding cone， while for the furnace without guiding cone， the particles in the lower central zone present strong normal stress. On the contrary， the particles exhibit weak normal stresses in the converging flow zone.

Key words: COREX shaft furnace, DEM(discrete element method), flow pattern, transient features, normal stress

中图分类号:

TF557

周恒，游洋，罗志国，邹宗树. COREX竖炉物料运动流型及瞬态特性的离散元模拟[J]. 东北大学学报:自然科学版, 2015, 36(9): 1293-1297.

ZHOU Heng， YOU Yang， LUO Zhi-guo， ZOU Zong-shu. Discrete Element Simulation of Solid Flow Pattern and Transient Features of Burden Descending in COREX Shaft Furnace[J]. Journal of Northeastern University:Natural Science, 2015, 36(9): 1293-1297.

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COREX竖炉物料运动流型及瞬态特性的离散元模拟

Discrete Element Simulation of Solid Flow Pattern and Transient Features of Burden Descending in COREX Shaft Furnace

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