双碳背景下中国钢铁行业未来发展趋势探讨

Discussion on the future development trend of China's iron and steel industry under the background of double carbon

  • 摘要: 钢铁行业是绿色低碳发展的重要领域,从战略层面上探讨钢铁行业的低碳转型路径具有重要意义。本文构建了钢铁行业粗钢产量、废钢资源产出量、碳排放量、铁素资源结构、生产流程结构、能源消费结构等预测模型,分设三类情景,对钢铁行业低碳转型路径从战略层面上进行了深入探讨。研究结果表明,随着产业结构的调整优化,我国粗钢产出总量将逐年降低,2060年有望降低至6~7亿吨;随着社会钢铁蓄积量的不断增加,废钢资源产出量将快速增长,预计于2045年前后达到峰值,约5~6亿吨;随着各类降碳措施的合理应用,行业CO2排放量将逐年稳步下降,预计2060年行业仍将剩余CO2排放量约0.9~1.9亿吨,此时借助CCUS、碳汇等技术手段可实现“碳中和”目标。除此之外,预计2060年我国铁矿资源消耗将在2023年基础上降低65%~77%,废钢资源消耗将增长0.90~0.97倍;高炉-转炉长流程占比将调整至15%~30%,全废钢电炉短流程占比提升至40%~50%,氢还原-电炉流程占比提升至28%~34%;煤炭资源消耗降低76%~89%,电力资源消耗维持在3200~4700亿千瓦时,氢气资源消耗约1000万吨。

     

    Abstract: The iron and steel industry is an important area for green and low-carbon development, and it is of great significance to explore the low-carbon transformation path of the iron and steel industry from a strategic level. In this paper, a forecast model for crude steel output, scrap steel resource output, carbon emissions, ferrous resource structure, production process structure, and energy consumption structure in the steel industry is constructed, and three scenarios are set up to explore the low-carbon transformation path of the steel industry from a strategic perspective. The research results indicate that with the adjustment and optimization of the industrial structure, the total output of crude steel in China will decrease year by year, and is expected to drop to 600-700 million tons in 2060. With the continuous increase in social steel accumulation, the output of scrap steel resources will grow rapidly, and is expected to reach a peak around 2045, at about 500-600 million tons. With the rational application of various carbon reduction measures, the industry's CO2 emissions will steadily decline year by year, and it is estimated that in 2060 the steel industry will still have remaining CO2 emissions of about 90-190 million tons. At this time, the "carbon neutrality" goal can be achieved through technologies such as CCUS and carbon sinks. In addition, it is expected that in 2060, China's iron ore resource consumption will be reduced by 65%~77% on the basis of 2023, and the consumption of scrap steel resources will increase by 0.90~0.97 times; the proportion of blast furnace-converter process will be adjusted to 15%~30%, the proportion of full-scrap electric furnace process will be increased to 40%~50%, and the proportion of hydrogen reduction-electric furnace process will be increased to 28%~34%; coal resource consumption will be reduced by 76%~89%, electricity resource consumption will be maintained at 320~470 billion kWh, and hydrogen resource consumption will be about 10 million tons.

     

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