D0I:10.133745.issn1001-053x.2013.07.013 第35卷第7期 北京科技大学学报 Vol.35 No.7 2013年7月 Journal of University of Science and Technology Beijing Jul.2013 生物质合成气直接还原铁矿一生物质复合球团炼铁 罗思义凶，周扬民，仪垂杰，岳霞，李宗刚 青岛理工大学环境与市政工程学院，青岛266033 ☒通信作者，E-mail:luosivi666@126.com 摘要为了使炼铁工业摆脱对化石能源的依赖及满足越来越严格的环境要求，将生物质能的开发利用与直接还原技术 进行集成提出一种新型的绿色炼铁方法.把生物质、铁矿广石粉与添加剂混合制取生球团，利用生物质催化气化制备的富 氢合成气作为还原剂，生物质的高温燃烧为生球团的预热和预热球团的直接还原提供外加热源.对影响生物质直接还原 炼铁的因素，如预热、还原温度及球团粒径进行了研究，发现减小球团粒径、增加预热和还原温度能够提高直接还原铁 产品的全铁质量分数及金属化率.当采用品位65.21%的铁精矿为原料，在最优操作条件下（生球团粒径介于8~10mm 之间，900℃预热30min,1000℃下还原60min)可制得全铁TFe质量分数为86.1%，金属化率为94.9%的高质量直接 还原铁产品 关键词生物质：合成气：直接还原；炼铁 分类号T℉55 Ironmaking by direct reduction of iron ore-biomass composite pellets using biomass syngas LUO Si-yi,ZHOU Yang-min,YI Chui-jie,YUE Xia,LI Zong-gang School of Environmental and Municipal Engineering,Qingdao Technological University,Qingdao 266033,China Corresponding author,E-mail:luosiyi666@126.com ABSTRACT In order to ease the shortage of fossil energy and to come up to the stricter effluent standard,this article introduces an innovative green ironmaking technology integrated of the direct reduction process and the development and utilization of biomass energy.Biomass was mixed together with iron ore powder and additives for producing green pellets.Hydrogen-rich syngas produced by biomass catalytic gasification was used as a reducing agent,and the heat produced by biomass combustion was used as the heat source of pellet preheating and reduction.Investigations on the effects of preheating,reduction temperature and green pellet size on the quality of direct reduction iron (DRI)show that increasing the preheating and reduction temperature and decreasing the pellet size can improve the quality of DRI. When iron concentrate with the iron grade of 65.21%was taken as raw materials,high-quality DRI with the total iron TFe of 86.1%and the metallization rate of 94.9%can be obtained at optimum operation conditions (pellet size of 8 to 10 mm,preheating at 900 C for 30 min and reduction at 1000 C for 30 min). KEY WORDS biomass;syngas;direct reduction process;ironmaking 钢铁工业是国民经济发展的重要基础产业，是 炭作为主要能源和越来越严的环保要求是高炉炼铁 国家经济水平和综合国力的重要标志.现代炼钢原 技术发展面临的极大困扰和难以跨越的障碍，严重 料主要来源于高炉炼铁、少量的废钢和直接还原铁. 影响了我国钢铁工业的可持续发展口，迫使人们寻 在世界钢铁工业中，炼钢生铁的供应60%左右来自 求新的燃料来代替冶金焦.因此，新型可再生炼铁 高炉，而我国几乎99%来自高炉炼铁.必须使用焦 燃料的开发与相应绿色炼铁工艺的研究对国民经济 收稿日期：2012-05-15 基金项目：山东省自然科学基金资助项目(ZR2011EEQ016)第 35 卷 第 7 期 北 京 科 技 大 学 学 报 Vol. 35 No. 7 2013 年 7 月 Journal of University of Science and Technology Beijing Jul. 2013 生物质合成气直接还原铁矿--生物质复合球团炼铁 罗思义 ，周扬民，仪垂杰，岳 霞，李宗刚 青岛理工大学环境与市政工程学院，青岛 266033 通信作者，E-mail: luosiyi666@126.com 摘 要 为了使炼铁工业摆脱对化石能源的依赖及满足越来越严格的环境要求，将生物质能的开发利用与直接还原技术 进行集成提出一种新型的绿色炼铁方法. 把生物质、铁矿石粉与添加剂混合制取生球团，利用生物质催化气化制备的富 氢合成气作为还原剂，生物质的高温燃烧为生球团的预热和预热球团的直接还原提供外加热源. 对影响生物质直接还原 炼铁的因素，如预热、还原温度及球团粒径进行了研究，发现减小球团粒径、增加预热和还原温度能够提高直接还原铁 产品的全铁质量分数及金属化率. 当采用品位 65.21%的铁精矿为原料，在最优操作条件下 (生球团粒径介于 8∼10 mm 之间，900 ℃预热 30 min，1000 ℃下还原 60 min) 可制得全铁 TFe 质量分数为 86.1%，金属化率为 94.9%的高质量直接 还原铁产品. 关键词 生物质；合成气；直接还原；炼铁 分类号 TF55 Ironmaking by direct reduction of iron ore-biomass composite pellets using biomass syngas LUO Si-yi , ZHOU Yang-min, YI Chui-jie, YUE Xia, LI Zong-gang School of Environmental and Municipal Engineering, Qingdao Technological University, Qingdao 266033, China Corresponding author, E-mail: luosiyi666@126.com ABSTRACT In order to ease the shortage of fossil energy and to come up to the stricter effluent standard, this article introduces an innovative green ironmaking technology integrated of the direct reduction process and the development and utilization of biomass energy. Biomass was mixed together with iron ore powder and additives for producing green pellets. Hydrogen-rich syngas produced by biomass catalytic gasification was used as a reducing agent, and the heat produced by biomass combustion was used as the heat source of pellet preheating and reduction. Investigations on the effects of preheating, reduction temperature and green pellet size on the quality of direct reduction iron (DRI) show that increasing the preheating and reduction temperature and decreasing the pellet size can improve the quality of DRI. When iron concentrate with the iron grade of 65.21% was taken as raw materials, high-quality DRI with the total iron TFe of 86.1% and the metallization rate of 94.9% can be obtained at optimum operation conditions (pellet size of 8 to 10 mm, preheating at 900 ℃ for 30 min and reduction at 1000 ℃ for 30 min). KEY WORDS biomass; syngas; direct reduction process; ironmaking 钢铁工业是国民经济发展的重要基础产业，是 国家经济水平和综合国力的重要标志. 现代炼钢原 料主要来源于高炉炼铁、少量的废钢和直接还原铁. 在世界钢铁工业中，炼钢生铁的供应 60%左右来自 高炉，而我国几乎 99%来自高炉炼铁. 必须使用焦 炭作为主要能源和越来越严的环保要求是高炉炼铁 技术发展面临的极大困扰和难以跨越的障碍，严重 影响了我国钢铁工业的可持续发展[1]，迫使人们寻 求新的燃料来代替冶金焦. 因此，新型可再生炼铁 燃料的开发与相应绿色炼铁工艺的研究对国民经济 收稿日期：2012–05–15 基金项目：山东省自然科学基金资助项目 (ZR2011EEQ016) DOI:10.13374/j.issn1001-053x.2013.07.013