高炉热储备区温度对煤气利用率的影响

doi:10.12068/j.issn.1005-3026.2018.07.015

东北大学学报:自然科学版 ›› 2018, Vol. 39 ›› Issue (7): 985-989.DOI: 10.12068/j.issn.1005-3026.2018.07.015

高炉热储备区温度对煤气利用率的影响

孟繁超，邹宗树

(东北大学冶金学院，辽宁沈阳110819)

收稿日期:2017-03-17 修回日期:2017-03-17 出版日期:2018-07-15 发布日期:2018-07-11
通讯作者: 孟繁超
作者简介:孟繁超(1987-)，男，辽宁辽阳人，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.冯明杰(1971-)，男，河南禹州人，东北大学副教授; 王恩刚(1962-)，男，辽宁沈阳人，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(51574064).国家自然科学基金资助项目(51171041).

Influence of Thermal Reserve Zone Temperature in Blast Furnace on Gas Utilization Rate

MENG Fan-chao， ZOU Zong-shu

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

Received:2017-03-17 Revised:2017-03-17 Online:2018-07-15 Published:2018-07-11
Contact: MENG Fan-chao
About author:-
Supported by:
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摘要/Abstract

摘要： 研究了高炉热储备区内温度与煤气利用率的关系.结合热力学和实际情况，热储备区内只发生氧化亚铁的还原.因此需要利用吉布斯自由能计算和单界面未反应核模型对热储备区内还原反应进行热力学和动力学分析.结果表明:只有在H₂+H₂O体积分数小于0.3时降低热储备区温度才能提高煤气利用率.从1273K降温到1223K，氢气还原速率降低得比CO还原速率降低得多，说明温度对氢气还原的影响更大.对一般高炉来说，炉料在热储备区中还原所需的时间比其停留时间长或接近，说明热储备区内的还原反应没有达到平衡，降低温度不利于提高煤气利用率.

关键词: 高炉, 热储备区, 热力学, 动力学, 煤气利用率

Abstract: The relationship between temperature of thermal reserve zone and the gas utilization rate of blast furnace was investigated. Considering thermodynamics and practical condition， only the reduction of ferrous oxide occurs in the thermal reserve zone. Thus， the thermodynamic analysis and kinetic analysis of reduction reactions in thermal reserve zone were carried out with standard Gibbs free energy calculation and unreacted shrinking core model， respectively. The results of thermodynamic analysis show that only when the (H₂+H₂O) volume fraction is smaller than 0.3， lowering temperature is effective for improving gas utilization. The kinetic analysis shows that decreasing temperature from 1273K to 1223K， the reduction rate with H₂ decreases more than that with CO， showing that the influence of temperature on the reduction with H₂ is greater than that with CO. For most blast furnaces， the required reduction time is somewhat longer than the burden residence time in the thermal reserve zone， which means that the reduction reactions in thermal reserve zone don’t attain their equilibria， and lowering temperature is not effective for improving gas utilization.

Key words: blast furnace, thermal reserve zone, thermodynamics, kinetics, gas utilization

中图分类号:

TF531

孟繁超，邹宗树. 高炉热储备区温度对煤气利用率的影响[J]. 东北大学学报:自然科学版, 2018, 39(7): 985-989.

MENG Fan-chao， ZOU Zong-shu. Influence of Thermal Reserve Zone Temperature in Blast Furnace on Gas Utilization Rate[J]. Journal of Northeastern University Natural Science, 2018, 39(7): 985-989.

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高炉热储备区温度对煤气利用率的影响

Influence of Thermal Reserve Zone Temperature in Blast Furnace on Gas Utilization Rate

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