摘要
钢铁行业作为碳减排重点领域,炼焦时产生的焦炉煤气如何充分利用,长期以来都是钢铁冶金企业钻研和攻克的难题,亟需通过工艺创新实现低碳转型。酒钢集团焦化厂年产焦炭310万t,副产焦炉煤气中氢气资源量达20万Nm^(3)/h,为氢基冶金提供了关键原料。针对120000 Nm^(3)/h富裕焦炉煤气,提出“预处理-耐硫变换-两级变压吸附(VPSA)”制氢工艺,年产氢气7.2亿Nm^(3)(纯度≥99.95%),单位成本0.39元/Nm^(3)(较外购降低67%)。该工艺可与钢铁生产深度协同,氢气直接用于高炉富氢还原(替代率25%)和直接还原铁(DRI)生产,形成“煤气制氢-氢能炼钢-低碳钢材”闭环产业链,年减排CO_(2)约80万t。研究为钢铁行业实现高质量发展提供了一条经济可行的低碳转型路径,凸显了焦炉煤气制氢在钢铁生产各流程中的核心价值。
As a key sector for carbon emission reduction,the steel industry has long been grappling with the challenge of fully utilizing coke oven gas(COG)generated during coking,necessitating process innovation to achieve low-carbon transformation.JISCO’s coking plant,with an annual coke production capacity of 3.1 million tons,produces by-product coke oven gas containing hydrogen resources of up to 200000 Nm^(3)/h,providing critical feedstock for hydrogen-based metallurgy.For the surplus 120000 Nm^(3)/h of coke oven gas,a hydrogen production process of“pretreatment-sulfur-tolerant shift-two-stage vacuum pressure swing adsorption(VPSA)”is proposed,yielding an annual hydrogen output of 720 million Nm^(3)(purity≥99.95%)at a unit cost of 0.39 yuan/Nm^(3)(67%lower than external procurement).This process can be deeply integrated with steel production,where the hydrogen is directly used for hydrogen-rich blast furnace reduction(25%substitution rate)and direct reduced iron(DRI)production,forming a closed-loop industrial chain of“gas-to-hydrogen-hydrogen steelmaking-low-carbon steel”with an annual CO_(2)reduction of approximately 800000 tons.The study provides an economically viable low-carbon transformation pathway for the high-quality development of the steel industry,highlighting the core value of coke oven gas-to-hydrogen in various steel production processes.
作者
余志鹏
张磊
YU Zhipeng;ZHANG Lei(Jiusteel Group Gansu Engineering Technology Co.Ltd.,Jiayuguan 735100,China)
出处
《甘肃冶金》
2025年第4期13-16,22,共5页
Gansu Metallurgy
关键词
焦炉煤气
氢基冶金
高炉富氢
直接还原铁(DRI)
碳减排
coke oven gas(COG)
hydrogen-based metallurgy
hydrogen-rich blast furnace
direct reduced iron(DRI)
carbon emission reduction
