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›› 2011, Vol. 11 ›› Issue (3): 429-435.

• 过程与工艺 • Previous Articles     Next Articles

Reduction Kinetics of Carbon-containing Pellets Made of Dust and Sludge under Weak Oxidizing Atmosphere

WEI Ru-fei LI Jia-xin LI Jie-min LONG Hong-ming WANG Ping GAO Gang LIN Gao-peng   

  1. School of Metallurgy and Resource, Anhui University of Technology Iron Making Plant III, Ma￠anshan Iron and Steel Co., Ltd., Ma￠anshan School of Metallurgy and Resource, Anhui University of Technology School of Metallurgy and Resource, Anhui University of Technology School of Metallurgy and Resource, Anhui University of Technology Iron Making Plant III, Ma￠anshan Iron and Steel Co., Ltd., Ma￠anshan
  • Received:2011-03-29 Revised:2011-04-26 Online:2011-06-20 Published:2011-06-20
  • Contact: LI Jia-xin

弱氧化性气氛下尘泥含碳球团的还原动力学

魏汝飞 李家新 李杰民 龙红明 王平 高岗 林高鹏   

  1. 安徽工业大学冶金与资源学院 马鞍山钢铁股份有限公司第三炼铁总厂 安徽工业大学冶金与资源学院 安徽工业大学冶金与资源学院 安徽工业大学冶金与资源学院 马鞍山钢铁股份有限公司第三炼铁总厂
  • 通讯作者: 李家新

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Abstract: Reduction experiment of carbon-containing pellets made of dust and sludge under weak oxidizing atmosphere in the temperature range from 1348 to 1573 K was conducted. By studying its kinetics and analyzing reduction mechanism, it is found that the restriction step of the reduction rate of pellets is interfacial reaction or local reaction, and the activation energy 111.66 kJ/mol, and the reduction rate of pellets can be expressed by Mckewan equation 1-(1-R)1/3=kt. In addition, temperature is an important factor influencing reaction rate, dezincification and metallization rates increase with temperature rising. Dezincification and metallization rates attain the maximum 97.83% and 79.92% respectively at 1573 K, compared with the minimum 75.25% and 60.17% at 1348 K.

Key words: dust and sludge, carbon-containing pellet, reduction kinetic, oxidizing atmosphere

摘要： 在1348~1573 K温度范围内，在弱氧化性气氛下还原尘泥含碳球团，通过动力学实验和还原机理分析，得出影响尘泥含碳球团还原速度的限制性环节为界面反应或局部反应，反应活化能为111.66 kJ/mol，还原速度可由Mckewan方程1-(1-R)1/3=kt表达. 随温度升高，反应速率增大，金属化率和脱锌率提高，金属化率和脱锌率1573 K时最高，分别为79.92%和97.83%, 1348 K时最低，仅为60.17%和75.25%.

关键词: 尘泥, 含碳球团, 还原动力学, 氧化性气氛

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