顶气循环氧高炉减碳潜力的数值分析

IF 3.1 2区 材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING
Xue-feng She , Xiu-wei An , Jing-song Wang , Qing-guo Xue , Ling-tan Kong
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引用次数: 12

摘要

针对目前高炉工艺特点,从直接还原度与碳耗关系的角度探讨了高炉的减碳潜力。建立了一种新的碳耗与直接还原度的关系图,更能反映高炉运行的真实情况。在此基础上,分析了富氢氧高炉(OBF)工艺的节能潜力。在此基础上,提出了政策启示。在此基础上,提高高炉减碳潜力的方法是脱除CO2和H2O回收高炉顶气或增加高炉煤气中的氢气和全氧鼓风。结果表明,传统高炉(TBF)的碳减排潜力仅为38 ~ 56 kg·t−1,而OBF的碳减排潜力为138 kg·t−1。理论上,OBF的最低碳消耗量为261 kg·t−1,相应的直接减排程度为0.04。富氢OBF的理论最低碳耗为257 kg·t−1。模型分析可用于估算炼铁新工艺的碳节约潜力及其相关的二氧化碳排放量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Numerical analysis of carbon saving potential in a top gas recycling oxygen blast furnace

Aiming at the current characteristics of blast furnace (BF) process, carbon saving potential of blast furnace was investigated from the perspective of the relationship between degree of direct reduction and carbon consumption. A new relationship chart between carbon consumption and degree of direct reduction, which can reflect more real situation of blast furnace operation, was established. Furthermore, the carbon saving potential of hydrogen-rich oxygen blast furnace (OBF) process was analyzed. Then, the policy implications based on this relationship chart established were suggested. On this basis, the method of improving the carbon saving potential of blast furnace was recycling the top gas with removal of CO2 and H2O or increasing hydrogen in BF gas and full oxygen blast. The results show that the carbon saving potential in traditional blast furnace (TBF) is only 38–56 kg · t−1 while that in OBF is 138 kg · t−1. Theoretically, the lowest carbon consumption of OBF is 261 kg · t−1 and the corresponding degree of direct reduction is 0.04. In addition, the theoretical lowest carbon consumption of hydrogen-rich OBF is 257 kg · t−1. The modeling analysis can be used to estimate the carbon savings potential in new ironmaking process and its related CO2 emissions.

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来源期刊
CiteScore
4.30
自引率
0.00%
发文量
2879
审稿时长
3.0 months
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