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在CO-N-H体系中耦合典型焦炭气化与烧结矿还原

Coupled Typical Coke Gasification and Sintering Ore Reduction in CO-N-H.

作者信息

Hu Jinglan, Qin Yuelin, Li Xin, Liu Haowen, Deng Yin, Liu Hao

机构信息

School of Metallurgy and Materials Engineering, Chongqing University of Science and Technology, Chongqing401331, China.

Value-Added Process and Clean Extraction of Complex Metal Mineral Resources, Chongqing Municipal Key Laboratory of Institutions of Higher Education, Chongqing401331, China.

出版信息

ACS Omega. 2022 Sep 15;7(38):34420-34427. doi: 10.1021/acsomega.2c04064. eCollection 2022 Sep 27.

DOI:10.1021/acsomega.2c04064
PMID:36188322
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9521018/
Abstract

Through thermodynamic calculation and high-temperature simulation experiments, the coupling behavior between gasification of high- and low-reactivity cokes and reduction of sintering ore in CO-N-H mixed gas with 25% H volume fraction was studied, and the evolution of the coke carbon structure and the pore structure was analyzed. The results show that the reaction rate of the two cokes increases with the increase in temperature after the coupling reaction, and the strength after drumming decreases with the increase in temperature. The strength of low-reactivity coke after the reaction is higher than that of high-reactivity coke, and the reduction degree of sintering ore after the coupling reaction with low-reactivity coke is higher than that with high-reactivity coke. At high temperatures and high hydrogen-rich atmospheres with φ(H) of 25%, the strength of high-reactivity coke after drum rotation is greater than 60.4%. The graphitization degree and carbon structure order of low-reactivity coke are higher than those of high-reactivity coke.

摘要

通过热力学计算和高温模拟实验，研究了高、低反应性焦炭在体积分数为25%H的CO-N-H混合气体中的气化与烧结矿还原之间的耦合行为，并分析了焦炭碳结构和孔隙结构的演变。结果表明，两种焦炭的反应速率在耦合反应后随温度升高而增加，转鼓后强度随温度升高而降低。低反应性焦炭反应后的强度高于高反应性焦炭，与低反应性焦炭耦合反应后烧结矿的还原度高于高反应性焦炭。在高温和φ(H)为25%的高富氢气氛下，高反应性焦炭转鼓后的强度大于60.4%。低反应性焦炭的石墨化程度和碳结构有序度高于高反应性焦炭。

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本文引用的文献

1
Influence of Temperature and CO on High-Temperature Behavior and Microstructure of Metallurgical Coke.温度和一氧化碳对冶金焦高温行为及微观结构的影响
ACS Omega. 2021 Jul 26;6(30):19569-19577. doi: 10.1021/acsomega.1c01675. eCollection 2021 Aug 3.