基于富氢焦炉煤气零重整的氢冶金工程技术

Hydrogen metallurgy engineering technologies based on zero reforming of hydrogen enriched coke oven gas

氢能是21世纪最具发展力的清洁能源,是中国未来能源体系的重要组成部分。构建“以氢代碳”的钢铁用能新体系是中国钢铁行业实现“双碳”目标的重要方向。针对以氢能源为基础的氢冶金技术原理和工艺流程,对氢冶金流程工程化、关键技术、技术经济指标、运行成本估算及CO_(2)减排情况等进行探讨,全面论述了氢冶金工程的系统组成和关键设备、工厂布局等情况。工程实践表明,以富氢焦炉煤气为还原气源的氢冶金工艺,采用气体零重整和气基直接还原炼铁技术,以氧化球团为原料,完全不使用焦炭、煤炭和烧结矿,从源头减少碳素使用,污染物产生和排放大幅减少;无烧结、焦化工序,总图布置紧凑,大幅节约用地;以焦炉煤气为气源的氢冶金,生产成本具有一定优势;根据技术经济指标估算,基于富氢焦炉煤气的氢冶金与高炉炼铁流程相比,可实现吨铁碳排放降低58.8%左右。氢冶金工艺可为后续电炉炼钢提供优质的高纯铁质原料,对提升中国钢铁产品质量具有重要意义,为未来钢铁行业实现绿色、低碳、高质量发展奠定了坚实基础。

Hydrogen energy is the most powerful clean energy in the 21 st century,and is an important part of our country's future energy system.Building a new steel energy system"replacing carbon with hydrogen"is an important direction of realizing double carbon target in China′s iron and steel industry.For hydrogen energy based hydrogen metallurgy technology,the principle and technological process,the hydrogen metallurgical products,key functional units are interconnected,hydrogen shaft furnace and other key equipment,plant layout,technical and economic indexes and operation cost estimation and CO_(2)emissions were discussed,such as the system structure and key technologies of hydrogen metallurgical engineering.The engineering practice shows that the hydrogen metallurgy process with hydrogen-rich coke oven gas as reduction gas source,using gas reforming and gas base direct reduction iron making technology,using oxidized pellets as raw material,completely eliminating the use of coke,coal and sinter,reducing the use of carbon from the source,and greatly reducing the generation and emission of pollutants.No sintering,coking process,the general layout is compact,greatly saving land.Hydrogen metallurgy with coke oven gas as gas source has some advantages in operational cost.Based on the estimation of technical and economic indicators,hydrogen metallurgy based on hydrogen-rich coke oven gas can achieve 58.8%reduction in carbon emission per ton of iron compared with blast furnace ironmaking process.Hydrogen metallurgical process can not only provide high-quality pure hot metal for the subsequent electric furnace steelmaking,but also play a significant role in improving the quality of Chinese iron and steel products,and lay a solid foundation for the future development of green,low carbon and high quality of iron and steel industry.