模拟的富氢高炉条件下铁焦气化、铁焦与焦炭共气化行为的研究

祝凯; 陈珠明; 叶水鑫; 耿淑华; 张玉文; 鲁雄刚

doi:10.1007/s12613-022-2429-0

Volume 29 Issue 10

Oct. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(10): 1839-1850

Kai Zhu, Zhuming Chen, Shuixin Ye, Shuhua Geng, Yuwen Zhang, and Xionggang Lu, Gasification of iron coke and cogasification behavior of iron coke and coke under simulated hydrogen-rich blast furnace condition, Int. J. Miner. Metall. Mater., 29(2022), No. 10, pp. 1839-1850. https://doi.org/10.1007/s12613-022-2429-0

Cite this article as:

Kai Zhu, Zhuming Chen, Shuixin Ye, Shuhua Geng, Yuwen Zhang, and Xionggang Lu, Gasification of iron coke and cogasification behavior of iron coke and coke under simulated hydrogen-rich blast furnace condition, Int. J. Miner. Metall. Mater., 29(2022), No. 10, pp. 1839-1850. https://doi.org/10.1007/s12613-022-2429-0

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研究论文

模拟的富氢高炉条件下铁焦气化、铁焦与焦炭共气化行为的研究

上海大学省部共建高品质特殊钢冶金与制备国家重点实验室，上海市钢铁冶金新技术开发应用重点实验室，上海大学材料科学与工程学院, 上海 200444，中国

通讯作者:
祝凯 E-mail: kaizhu@shu.edu.cn

鲁雄刚 E-mail: luxg@shu.edu.cn

文章亮点

(1) 系统研究了铁矿粉配比对铁焦气化行为的影响。

(2) 明析了铁焦在传统100%CO₂和富氢气氛60%CO₂+40%H₂O 气氛下初始气化差异与共气化机理。

(3)探究了铁焦在富氢高炉气氛下对焦炭的影响。

中文摘要

氢冶金是实现低碳排放目的有效方法，为探索铁焦在富氢高炉中的应用，本文系统研究了铁焦在CO₂和H₂O(g)+CO₂气氛中的初始气化温度及其与焦炭的共气化反应机理。以焦煤和铁矿粉为主要原料，在实验室制备适用于富氢高炉气氛的铁焦。采用焦炭反应性(CRI)和反应后强度(CSR)测试了铁焦的性能，并通过SEM和XRD讨论了铁焦与焦炭气化过程中物相和形貌的演变。实验结果表明，在CO₂和H₂O(g)气氛下，随着铁矿粉含量的增加，铁焦的初始气化温度降低；在40vol%H₂O+60vol%CO₂气氛下，添加3wt%铁矿粉的铁焦CRI达到58.7%，CSR达到56.5%。由于铁的催化作用，铁焦的反应能力大于焦炭，铁焦优先气化而导致CRI降低，铁焦和焦炭共气化时CSR增加。铁焦可以保护焦炭的骨架功能。

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Research Article

Gasification of iron coke and cogasification behavior of iron coke and coke under simulated hydrogen-rich blast furnace condition

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Abstract

Abstract

To explore the iron coke application in hydrogen-rich blast furnace, which is an effective method to achieve the purpose of low carbon emissions, the initial gasification temperature of iron coke in CO₂ and H₂O atmosphere and its cogasification reaction mechanism with coke were systematically studied. Iron coke was prepared under laboratory conditions, with a 0–7wt% iron ore powder addition. The properties of iron cokes were tested by coke reactivity index (CRI) and coke strength after reaction (CSR), and their phases and morphology were evolution discussed by scanning electron microscopy and X-ray diffraction analysis. The results indicated that the initial gasification temperature of iron coke decreased with the increase in the iron ore powder content under the CO₂ and H₂O_(g) atmosphere. In the 40vol% H₂O + 60vol% CO₂ atmosphere, CRI of iron coke with the addition of 3wt% iron ore powder reached 58.7%, and its CSR reached 56.5%. Because of the catalytic action of iron, the reaction capacity of iron coke was greater than that of coke. As iron coke was preferentially gasified, the CRI and CSR of coke were reduced and increased, respectively, when iron coke and coke were cogasified. The results showed that the skeleton function of the coke can be protected by iron coke.
- iron coke;
- hydrogen-rich blast furnace;
- coke gasification;
- coke reactivity index;
- coke strength after reaction

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