摘要
为了实现钢铁行业的绿色低碳转型,中国宝武2021年发布碳中和技术路线图,将氢冶金作为6大技术方向、2条主要技术路径之一。结合传统氢冶金所需高品位铁矿石资源紧缺的现状,2023年,中国宝武提出了资源适应性更广的氢还原电熔炼工艺(Hydrogen Reduction and Electric Smelting Process,HyRESP),该工艺中氢基竖炉和电熔分炉是核心装备。高品位铁矿石经氢基竖炉还原后进入电炉炼钢工序,低品位铁矿石经氢基竖炉还原后,通过电炉熔分获得铁水并送转炉冶炼。对比了5种不同品位铁矿石的氢还原行为差异,探究DRI在电熔分炉中的熔化规律,研究结果表明:对比气基竖炉的相关标准,只有P3球团可100%使用;电熔分炉铁水w(S)较高、w(C)较低,通过将炉渣碱度由1.03增加至1.32,可将铁水w(S)由0.075%降低至0.047%,通过碳粉喷吹可将铁水w(C)由1.92%提高至2.50%,碳收得率为82.9%。
In order to achieve the green and low-carbon transformation of the steel industry,China Baowu released a carbon neutrality technology roadmap in 2021,which includes hydrogen metallurgy as one of the six major technological directions and two main technological paths.In response to the shortage of high-grade iron ore resources in traditional hydrogen metallurgy,China Baowu proposed the HyRESP(Hydrogen Reduction and Electric Smelting Process)with wider resource adaptability in 2023.In this process,high-grade iron ore is subjected to electric furnace steelmaking after hydrogen reduction.After hydrogen reduction of low-grade iron ore,it is melted in an electric furnace to obtain molten iron,which is then fed into a converter for smelting.The current research compares the hydrogen reduction behavior differences among five types of iron ore with varying grades,investigates the melting characteristics of direct reduced iron(DRI)in an electric smelting furnace,and presents the following findings:compared to the relevant standards for direct reduction shaft furnaces,only P3 pellets can be used at 100%.The hot metal from electric smelting furnace shows high sulfur and low carbon content.By increasing the slag basicity from 1.03 to 1.32,the w(S)in the hot metal can be reduced from 0.075%to 0.047%.Additionally,by injecting carbon powder,the w(C)in the hot metal can be increased from 1.92%to 2.50%,achieving a carbon recovery rate of 82.9%.
作者
朱彤
毛晓明
李建
郑恒
ZHU Tong;MAO Xiaoming;LI Jian;ZHENG Heng(Research Institute,Baoshan Iron&Steel Co.,Ltd.,Shanghai 201999,China)
出处
《宝钢技术》
2025年第6期22-26,共5页
Baosteel Technology
关键词
铁矿石
HyRESP
氢还原
电熔炼
iron ore
HyRESP
hydrogen reduction
electric smelting
