富氢碳循环氧气高炉工艺开发与实践  

Process development and practice of HyCROF

作　　者：毛晓明 许海法 MAO Xiaoming;XU Haifa(Central Research Institute,China Baowu Steel Group Corporation,Shanghai 201999,China)

机构地区：[1]中国宝武钢铁集团公司中央研究院,上海201999

出　　处：《钢铁》2024年第9期32-37,共6页Iron and Steel

摘　　要：在钢铁碳中和的背景下,高炉-转炉流程将面临着越来越严峻的低碳转型压力。经过几百年的发展,现代高炉炼铁工艺已十分成熟,无论是热效率还是产能规模,在当今冶金界都找不到比高炉更优秀的反应器,钢铁冶金完全放弃高炉工艺路线是非常可惜的。中国废钢保有量和循环量较少,采用电炉短流程低碳工艺不足以保障国民经济对钢铁产品量的需求,高炉流程在比较长的时间内还将是中国钢铁工业的主流流程。为应对低碳发展要求,中国宝武自主开发了富氢碳循环氧气高炉(HyCROF:Hydrogen-enriched Carbonic oxide Recycling O_(x)ygenate Furnace)新工艺,旨在通过碳循环和清洁能源替代来实现炼铁大幅减碳,宝武针对HyCROF炉顶煤气CO_(2)深度经济脱除、高还原势煤气安全高效加热、基于竞争燃烧的风口喷吹装置设计和全氧鼓风煤气循环下合理煤气分布四大技术难点开展了基础研究,建设了工业规模级HyCROF试验平台,持续开展了大量的工业实证研究。工业实证研究结果表明,HyCROF新工艺安全、稳定、顺行、高效,抗波动能力强,可大幅降低还原剂比例,在喷煤比相当的情况下,固体燃料消耗相比基准期下降了约30%,碳排放已下降20%以上,与传统制造流程匹配性好。鉴于HyCROF工艺良好的试验效果,其工艺技术已经被应用于2500 m^(3)高炉。Under the policy constraints of the national dual carbon goals,the blast furnace converter process will face increasingly severe low-carbon transformation pressure.After hundreds of years of development,the modern blast furnace ironmaking process has been very mature.A reactor better than the blast furnace haven′t been found in today′s metallurgical industry,whether on thermal efficiency or capacity scale.It is a huge loss to completely abandon the blast furnace process,which is not feasible in the short term.In order to meet the requirements of lowcarbon development and extend the vitality of blast furnaces,China Baowu has independently developed a new process called HyCROF(Hydrogen-enriched Carbonic oxide Recycling O_(x)ygenate Furnace),aiming to achieve significant carbon reduction in ironmaking through carbonic oxide recycling and clean energy substitution.In order to turn technological concepts into reality,China Baowu conducted basic research on four major technical difficulties deep economic removal of CO_(2) from the top gas of HyCROF,safe and efficient heating of high reduction potential gas,design of tuyere injection device based on competitive combustion,and reasonable gas distribution under pure oxygen injection and carbonic oxide recycling.Then,an industrial scale HyCROF test platform was constructed through transformation.A large amount of industrial empirical research has continuously conducted on the platform.The results of industrial empirical research show that the new HyCROF process is safe,stable,smooth,efficient,and has strong resistance to fluctuations.It can significantly reduce the proportion of reducing agents.When the coal injection ratio is equivalent,the consumption of solid fuel has decreased by about 30%compared to the baseline period.The main reduction is coke consumption,and the carbon emissions per ton hot metal have decreased by more than 20%.It has good compatibility with traditional manufacturing processes and has certain advantages in manufacturing costs compared to other

关 键 词：HyCROF 碳循环 富氢冶炼 煤气加热 低碳炼铁 

分 类 号：TF54[冶金工程—钢铁冶金]