基于碳转移和排放识别的中国传统钢铁制造工艺的减排潜力
Binfan Jiang1, Zhuohang Tian1, Qiuwang Wang2
1School of Energy and Environmental Engineering, University of Science and Technology Beijing, Beijing 100083, China; Beijing Key Laboratory of Energy Saving and Emission Reduction for Metallurgical Industry, University of Science and Technology Beijing, Beijing 100083, China.
The Science of the total environment
|September 2, 2025
概括
作为二氧化碳的主要排放者,中国的钢铁行业需要实现碳中和. 新的模型显示,高炉的技术创新能减少二氧化碳排放量.
科学领域:
- 环境科学
- 化学工程
- 材料科学
背景情况:
- 钢铁行业是中国最大的二氧化碳排放者,占全国排放量的15%.
- 这一部门的脱碳对于实现中国的碳中和目标至关重要.
- 主要的高炉和基本氧炉 (BF-BOF) 工艺呈现复杂的碳流,阻碍了精确的二氧化碳排放估计.
研究的目的:
- 为了解二氧化碳排放,建立BF-BOF过程的碳计数模型.
- 分析各种脱碳策略的二氧化碳减排潜力.
- 量化技术创新对减少行业碳足迹的影响.
主要方法:
- 在BF-BOF过程中基于碳转移分析的详细碳计数模型的开发.
- 模拟因提高能源效率而产生的二氧化碳排放变化.
- 评估原材料组合的改造和创新的高炉技术 (例如,顶部气体回收,COG注入).
主要成果:
- 据估计,中国BF-BOF工艺的二氧化碳排放量为1864.9万 (1954千克CO2/),其中61.03%来自BF铁制造阶段.
- 提高能源效率和改变原材料可以分别减少3.68%和16.23%的排放量.
- 创新的BF技术,如顶部气体循环和COG注入,可提供28.51%和36.22%的大幅降低.
结论:
- 传统高炉铁制造技术创新为中国钢铁行业提供了最大的二氧化碳减排潜力.
- BF-BOF过程脱碳是实现国家碳中和目标的关键策略.
- 开发的碳计数模型有效量化了各种减排方法的排放变化.
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