COREX竖炉螺旋结构对物料运动影响的DEM模拟

doi:10.12068/j.issn.1005-3026.2018.01.012

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (1): 55-60.DOI: 10.12068/j.issn.1005-3026.2018.01.012

COREX竖炉螺旋结构对物料运动影响的DEM模拟

张丽娟，邱子龙，罗志国，邹宗树

(东北大学冶金学院，辽宁沈阳110819)

收稿日期:2016-07-13 修回日期:2016-07-13 出版日期:2018-01-15 发布日期:2018-01-31
通讯作者: 张丽娟
作者简介:张丽娟(1969-)，女，辽宁大连人，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:
国家自然科学基金资助项目(51604068).

Effect of Screw Structure on Burdens Moving Behavior in COREX Shaft Furnace with DEM Simulation

ZHANG Li-juan， QIU Zi-long， LUO Zhi-guo， ZOU Zong-shu

School of Metallurgy， Northeastern University， Shenyang 110819， China.

Received:2016-07-13 Revised:2016-07-13 Online:2018-01-15 Published:2018-01-31
Contact: QIU Zi-long
About author:-
Supported by:
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摘要/Abstract

摘要： 基于离散单元方法建立了三维COREX-3000竖炉模型，通过模拟研究比较了宝钢螺旋与设计的均匀下料螺旋的下料均匀性指数、物料流型和物料下降速度在炉内的分布.结果表明，宝钢螺旋的下料均匀性指数在第1节到第5节螺旋上都较小，最大值在第4节螺旋上为0.36，而设计螺旋的下料均匀性指数在整个下料段都接近1，在理论上达到了均匀下料的目的;从宏观上看，设计螺旋在整个竖炉高度上的物料流型比宝钢螺旋更均匀;在围管下方设计螺旋沿竖炉径向的下料速度比宝钢螺旋均匀，在围管上方螺旋结构对物料下降速度的影响很小，下料模式接近活塞流.

关键词: COREX 预还原竖炉, 离散单元法, 流型, 螺旋设计, 下料速度

Abstract: A COREX-3000 shaft furnace model was established based on discrete element method to compare the drawdown uniformity coefficient， drawdown pattern and distribution of descending velocity between Baosteel screw and the newly designed screw by means of simulating. The results show that the drawdown uniformity coefficients of Baosteel screw from pitch 1 to pitch 5 are small and the peak 0.36 appears at pitch 4. However， the drawdown uniformity coefficients of the newly designed screw are close to 1 in all the burden drawdown area. From the macroscopic aspect， the drawdown patterns of the new screw along the whole height of shaft furnace are more uniform than that of Baosteel screw. Below the gas slots， the distribution of descending velocity along the radius of the shaft furnace with the new screw are more uniform than that with Baosteel screw. Above the gas slots， the effect of screw structure on burden descending velocity is small， and the drawdown patterns is more like plug flow.

Key words: COREX shaft furnace, discrete element methods, flow patterns, screw design, burden descending velocity

中图分类号:

TF557

张丽娟，邱子龙，罗志国，邹宗树. COREX竖炉螺旋结构对物料运动影响的DEM模拟[J]. 东北大学学报:自然科学版, 2018, 39(1): 55-60.

ZHANG Li-juan， QIU Zi-long， LUO Zhi-guo， ZOU Zong-shu. Effect of Screw Structure on Burdens Moving Behavior in COREX Shaft Furnace with DEM Simulation[J]. Journal of Northeastern University Natural Science, 2018, 39(1): 55-60.

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COREX竖炉螺旋结构对物料运动影响的DEM模拟

Effect of Screw Structure on Burdens Moving Behavior in COREX Shaft Furnace with DEM Simulation

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