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中南大学学报(自然科学版)

Journal of Central South University

第47卷    第2期    总第258期    2016年2月

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文章编号:1672-7207(2016)02-0394-07
COREX竖炉内部结构对物料运动影响的物理模拟
周恒1, 2,游洋1, 2,张涛1, 2,罗志国1, 2,邹宗树1, 2

(1. 东北大学材料与冶金学院,辽宁沈阳,110819;
2. 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
)

摘 要: 建立COREX竖炉三维半周冷态模型,物理模拟炉内结构对物料运动的影响,考察不同操作条件下AGD梁及导流锥对物料运动流型的改变。模拟结果显示:无AGD梁COREX竖炉内物料运动流型呈现‘一’→ ‘U’→ ‘W’的演变过程,而AGD竖炉则在围管区域经历波浪型及初始‘W’流型,AGD梁影响围管区域物料的均匀下降。非工况单侧停机条件下,AGD竖炉内物料活跃区面积减小,死料区面积增大,易引起炉内无滑移物料的接触挤压时间变长,导致炉料的黏结结块,造成炉况的进一步恶化。非对称排料(7.29~14.6 r/min)时,无AGD竖炉上方物料均匀下降,而AGD竖炉内一侧物料运动行为相对独立于另一侧。竖炉下部导流锥有利于促进竖炉上部物料均匀下降和竖炉下部的顺滑排料。

 

关键词: COREX 竖炉;物料运动;物理模拟;AGD梁;导流锥

Influence of COREX shaft furnace inner structure onsolid flow by physical modelling
ZHOU Heng1, 2, YOU Yang1, 2, ZHANG Tao1, 2, LUO Zhiguo1, 2, ZOU Zongshu1, 2

1. School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China;
2. Key Laboratory of Ecological Utilization of Multi-metallic Minerals of Education Ministry,
Northeastern University, Shenyang 110819, China

Abstract:A three-dimensional semicirular cold model of COREX shaft furnace was established and the influence of inner structure on solid flow was investigated through this model. The solid flow profile of packed bed with or without AGD beams and guiding cone were measured with different operational parameters. The simulated results show that the solid flow pattern turn out to be clear ‘一’ →‘U’ →‘W’ type in furnace without AGD beams. Comparing with traditional inner structure COREX shaft furnace, the solid flow profile in new-design furnace with AGD beams experience ‘Wave’ and rudiment of ‘W’ shape in bustle region. The difference demonstrates that AGD beams influence the uniform descending in bustle pipe zone to a certain extent. For asymmetric flow case, particles are removed from only one side of the model, the active zone of particles decreases in size and the stagnant zone increases as the AGD beams install. This implies that AGD beams possibly increase the period of static contacts between particles and the related sticking effect in the asymmetric flow. The studies in asymmetric flow experiments(7.29-14.6 r/min) reveal that particles descend with a relatively uniform velocity in top half of the model without AGD beams, while the flow behaviour on one side is largely independent of the flow on the other side in furnace with AGD beams. Theguiding cone plays an important role in uniform descending in the upper zone and also in smooth discharging in the lower zone of the shaft furnace.

 

Key words: COREX shaft furnace; solid flow; physical modelling; AGD beams; guiding cone

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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