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过程工程学报 ›› 2015, Vol. 15 ›› Issue (6): 1029-1033.DOI: 10.12034/j.issn.1009-606X.215300

• 过程与工艺 • 上一篇    下一篇

褐铁矿的煤泥球团直接还原

陈伟鹏 李光卫 赵增武 李保卫 武文斐   

  1. 内蒙古科技大学能源与环境学院 内蒙古科技大学能源与环境学院 内蒙古科技大学白云鄂博矿多金属资源综合利用重点实验室 内蒙古科技大学能源与环境学院 内蒙古科技大学内蒙古自治区白云鄂博矿多金属资源综合利用重点实验室
  • 收稿日期:2015-08-13 修回日期:2015-09-17 出版日期:2015-12-20 发布日期:2015-12-20
  • 通讯作者: 李光卫

Direct Reduction of Limonite-Coal Slime Pellets

CHEN Peng-wei LI Guang-wei ZHAO Zeng-wu LI Bao-wei WU Wen-fei   

  1. Key Laboratory of Integrated Exploitation of Bayan Obo mine poly-metallic resources, College of Energy and Environment,Inner Mongolia University of Science and Technology Key Laboratory of Integrated Exploitation of Bayan Obo mine poly-metallic resources, College of Energy and Environment,Inner Mongolia University of Science and Technology Inner Mongolia Key Laboratory for Utilization of Bayan Obo Multi-Metallic Resources: Elected State Key Laboratory,Inner Mongolia University of Science and Technology School of Energy amd Environment,University of Science and Technology Inner Mongolia School of Energy amd Environment,University of Science and Technology Inner Mongolia
  • Received:2015-08-13 Revised:2015-09-17 Online:2015-12-20 Published:2015-12-20
  • Contact: LI Guang-wei

摘要: 以煤泥为还原剂,考察了其种类及用量、还原温度与时间以及CaCO3添加量等对褐铁矿中铁氧化物直接还原的影响,研究了不同条件下还原产物中铁矿物的存在形式,考察了添加剂用量对含碳球团熔融分解的影响. 结果表明,煤泥C还原效果最好,其用量30%,CaCO3添加量3%,在1250℃下直接还原30 min,含碳球团金属化率达94.02%. 铁在产物中主要以金属铁颗粒存在,粒度多大于30 mm,添加3% CaCO3使渣铁分离效果明显,有利于产物分离. 表明煤泥是一种良好的褐铁矿还原剂.

关键词: 煤泥, 直接还原, 褐铁矿, 金属化率, 含碳球团, CaCO3

Abstract: The effects of type and dosage of coal slime as reducing agent, reduction temperature and time, and dosage of CaCO3 on direct reduction of limonite containing iron oxides were examined. The iron-containing components in reduced product at different conditions were analyzed. The effect of additive dosage on carbon-containing pellet melt decomposition was also studied. The results show that coal slime C is the best reducing agent. The reduced product with metallization rate of 94.02% is obtained under the conditions of coal slime C 30%, CaCO3 3%, and 1250℃ for 30 min. The iron in product is basically metallic iron with the particle sizes over 30 mm. Moreover, addition of 3% CaCO3 makes slag and iron separate apparently, which is conducive to further separation of reduced product. Therefore, the coal slime can be regarded as a good reducing agent for direct reduction of limonite.

Key words: coal slime, direct reduction, limonite, metallization rate, carbon-containing pellet, CaCO3

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