摘要
“双碳”背景下,发展低碳冶金技术已是我国钢铁企业低碳转型的必然趋势。本文在分析我国焦炉煤气的利用及气基直接还原技术现状的基础上,通过建立钢铁企业内部焦炉煤气平衡模型,提出了基于焦炉煤气平衡的长短流程冶金工艺的合理布局,以期通过合理利用焦炉煤气发展直接还原炼铁技术,为冶金工序减碳提供解决方案。同时,本文以年产5×10^(6)t高炉铁水的钢铁企业为例,根据焦炉煤气平衡模型计算,富余的焦炉煤气可满足年产1×10^(6)t直接还原铁生产线燃气需求,且焦化产生的碎焦可为每吨烧结矿提供42.0 kg的焦粉,基本满足烧结对燃料的需求。此外,长流程和短流程相融合的新模式下,吨钢CO_(2)排放量降低到1 193 kg,减碳比高达30.32%。
Under the background of “double carbon”,the development of low-carbon iron-making technology is an inevitable trend for low-carbon transformation for China′s iron and steel enterprises.Based on the analysis of the utilization of coke oven gas and the current situation of gas-based direct reduction technology in China, a rational layout on metallurgical processes of long and short process based on coke oven gas balance is proposed by establishing a balance model of coke oven gas within iron and steel enterprises, with a view to developing direct reduction iron-making technology through rational utilization of coke oven gas and to providing solutions for carbon reduction in metallurgical processes.Meanwhile, an iron and steel enterprise with an annual output of 5×10^(6) t of molten iron in blast furnace is taken as an example, and according to the calculation on coke oven gas balance model, the surplus coke oven gas can meet the gas demand of direct reduction iron production line of the 1×10^(6) t, and the crushed coke produced by coking can provide 42.0 kg of coke powder per ton of sinter, which basically meet the fuel demand for sintering.In addition, under the new mode that combines long process and short process, the CO_(2) emission per ton of steel is reduced to 1 193 kg, and the carbon reduction ratio is as high as 30.32%.
作者
代友训
余俊杰
王兆才
陈宇
DAI Youxun;YU Junjie;WANG Zhaocai;CHEN Yu(Zhongye Changtian International Engineering Co.,Ld.,Changsha 410205,Hunan,China;National Engineering Research Center of Sintering and Plletizing Equipment System,Changsha 410205,Hunan,China)
出处
《烧结球团》
北大核心
2022年第3期66-72,113,共8页
Sintering and Pelletizing
基金
湖南省科技成果转化及产业化计划资助项目(2020GK4055)。
关键词
焦炉煤气
平衡模型
气基直接还原
CO_(2)减排
coke oven gas
equilibrium model
gas-based direct reduction
CO_(2) emission reduction
作者简介
代友训(1983-),男,高级工程师,从事铁矿烧结球团、直接还原方面的研究及工程设计工作。
