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›› 2014, Vol. 14 ›› Issue (5): 823-828.

• 过程与工艺 • 上一篇    下一篇

加入聚乙烯的含碳铁矿球团的直接还原

陈伟鹏 谢智辉 张欢 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 内蒙古科技大学能源与环境学院
  • 收稿日期:2014-08-18 修回日期:2014-10-08 出版日期:2014-10-20 发布日期:2014-10-20
  • 通讯作者: 谢智辉

Direct Reduction of Polyethylene-added Carbon-containing Iron Ore Roasted Pellets

CHEN Wei-peng XIE Zhi-hui ZHANG Huan 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 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:2014-08-18 Revised:2014-10-08 Online:2014-10-20 Published:2014-10-20
  • Contact: XIE Zhi-hui

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被引次数

2

摘要： 以包头地区褐铁矿和无烟煤为主要原料，加入聚乙烯颗粒制成含碳铁矿球团，直接还原制备珠铁. 考察了还原温度、还原时间、配碳量及聚乙烯加入量对含碳铁矿球团直接还原的影响. 结果表明，影响含碳铁矿球团还原率的因素为还原温度、还原时间、配碳量、聚乙烯加入量. 最佳还原条件为C/O摩尔比1.2，加入聚乙烯量4%(w), 1350℃下保温5 min. 该条件下产物还原率最高，达99.87%. 加入一定量聚乙烯可缩短球团还原时间、降低还原温度、提高还原效率. 添加2% CaF2不仅使渣铁分离效果明显，且分离的渣可自然粉化，有利于筛分得到高品质珠铁.

关键词: 含碳铁矿球团, 直接还原, 褐铁矿, 聚乙烯, 还原率

Abstract: Polyethylene particles were mixed with limonite powder and bentonite for producing carbon-containing iron ore roasted pellets in order to produce directly reduced iron by direct reduction in a muffle furnace. The effects of reduction temperature, time, molar ratio of carbon to oxygen (C/O) and content of polyethylene on reduction rate of carbon-containing iron ore roasted pellets were studied by orthogonal and single factor experiments. The results showed that the main influential factors include reduction temperature, reduction time, C/O and content of polyethylene. Under the optimum conditions of reduction time of 5 min, temperature of 1350℃, C/O of 1.2 and content of polyethylene of 4%(w), the reduction rate of pellets can reach up to 99.87%. In addition, the reduction time can be shortened, the reduction temperature reduced, and the reduction rate of the pellets improved by adding a certain proportion of polyethylene. Moreover, adding 2%(w) CaF2 in the balling process makes slag and iron separate apparently, and separated slag pulverize naturally. This is conducive to further screening for high-quality directly reduced iron.

Key words: carbon-containing iron ore roasted pellets, direct reduction, limonite, polyethylene, reduction rate

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