欢迎访问过程工程学报, 今天是

过程工程学报 ›› 2015, Vol. 15 ›› Issue (4): 620-625.DOI: 10.12034/j.issn.1009-606X.215172CSTR: 32067.14.jproeng.215172

• 过程与工艺 • 上一篇    下一篇

煤在铜渣熔融还原铁尾渣降温中的热解特性

蔚俊强 李磊 谢晓峰 王飞 刘继磊 胡建杭   

  1. 昆明理工大学冶金与能源工程学院 昆明理工大学冶金与能源工程学院 冶金节能减排教育部工程研究中心 昆明理工大学冶金与能源工程学院 昆明理工大学冶金与能源工程学院 昆明理工大学工业节能与能源新技术云南省高校工程研究中心
  • 收稿日期:2015-03-30 修回日期:2015-05-08 出版日期:2015-08-20 发布日期:2015-08-20
  • 通讯作者: 李磊

Pyrolysis Characteristics of Coal in Cooling Process of Copper Slag Molten Reduction Tailings

WEI Jun-qiang LI Lei XIE Xiao-feng WANG Fei LIU Ji-lei HU Jian-hang   

  1. Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Faculty of Metallurgical and Engineering, Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Faculty of Metallurgical and Energy Engineering, Kunming University of Science and Technology Province Engineering Research Centre of Industrial Energy Conservation and New Energy Technology, Kunming University of Science and Technology
  • Received:2015-03-30 Revised:2015-05-08 Online:2015-08-20 Published:2015-08-20
  • Contact: LI Lei

PDF

被引次数

21

摘要： 通过动力学计算，结合XRD和气相色谱分析，对降温条件下单煤及以铜渣熔融还原尾渣为载体的煤的热解行为进行了研究. 结果表明，在初始温度1200℃、降温速率6.667 K/min条件下，煤混渣中煤热解最大速率较单煤增大，时间提前6~7.5 min，失重增加4.51%~11.43%；煤混渣热解气体中H2含量增高，原因为渣中CaO组分对煤中芳香环的脱氢效应；单煤及煤混渣样在降温过程中热解及气化反应均属一级反应，煤混渣样初始热解及气化反应表观活化能低于单煤，但主热解区表观活化能大于单煤，原因为主热解区还原性气氛增强，同步发生渣中高价铁氧化物的还原，反应类型增加，表观活化能变大.

关键词: 尾渣, 降温, 煤, 快速热解, 动力学

Abstract: The pyrolysis characteristics of coal in cooling process of the high temperature molten tailings produced in copper slag smelting reduction process with both single coal and coal-slag mixture samples were studied by kinetic calculation, and XRD and meteorological chromatography analysis. The results showed that under the initial temperature of 1200℃ and cooling rate of 6.667 K/min, the maximum mass loss rate of coal increased, the corresponding time point ended before 6~7.5 min and final mass loss quantity increased 3.08%~6.3% with the coal-slag mixture compared with the single coal pyrolysis. The CaO component in the slag had dehydrogenation effect on the coal aromatic rings, leading to the increase of content of H2 in pyrolysis gas. Pyrolysis of both samples showed the first order reaction, and the activation energy of primary pyrolysis and gasification reaction of coal-slag mixture sample decreased compared with the single coal. But the main pyrolysis activation energy of coal-slag mixture increased compared with the single coal, because the reducibility in the main pyrolysis bed caused the reduction of high valence iron oxides. The increase of reaction types made the apparent activation energy become higher.

Key words: tailings, cooling, coal, rapid pyrolysis, kinetics

中图分类号: