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水泥窑协同处置过程中Pb、Cd的挥发特性

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崔敬轩, 闫大海, 李丽, 王祖光, 于鸿锦, 何洁, 王琪. 水泥窑协同处置过程中Pb、Cd的挥发特性[J]. 环境工程学报, 2013, 7(12): 5001-5006.
引用本文: 崔敬轩, 闫大海, 李丽, 王祖光, 于鸿锦, 何洁, 王琪. 水泥窑协同处置过程中Pb、Cd的挥发特性[J]. 环境工程学报, 2013, 7(12): 5001-5006.
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Cui Jingxuan, Yan Dahai, Li Li, Wang Zuguang, Yu Hongjin, He Jie, Wang Qi. Volatilizing characteristic of lead and cadmium during co-processing in cement kiln[J]. Chinese Journal of Environmental Engineering, 2013, 7(12): 5001-5006.
Citation: Cui Jingxuan, Yan Dahai, Li Li, Wang Zuguang, Yu Hongjin, He Jie, Wang Qi. Volatilizing characteristic of lead and cadmium during co-processing in cement kiln[J]. Chinese Journal of Environmental Engineering, 2013, 7(12): 5001-5006.
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水泥窑协同处置过程中Pb、Cd的挥发特性

  • 1.

    北京科技大学土木与环境工程学院, 北京 100083

  • 2.

    中国环境科学研究院固体废物 污染控制技术研究所, 北京 100012

  • 3.

    环境保护部环境保护对外合作中心, 北京 100035

  • 基金项目:

    环保公益性行业科研专项（201209023）

    中挪合作项目（CHN215009/059）

  • 中图分类号: X705

Volatilizing characteristic of lead and cadmium during co-processing in cement kiln

  • 1.

    Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China

  • 2.

    Research Institute of Solid Waste Management, Chinese Research Academy of Environmental Sciences, Beijing 100012, China

  • 3.

    Foreign Economic Cooperation Office, Ministry of Environmental Protection, Beijing 100035, China

  • Fund Project:

  • 摘要: 对铅、镉2种重金属的氧化物开展了热重实验、熟料煅烧以及熟料消解实验，以重金属的挥发率为主要指标，研究了水泥窑协同处置过程中铅、镉在等温条件下随时间的挥发特性。结果表明，2种重金属的挥发率均是随温度的升高，时间的增加而增大。Pb的挥发率为96%，Cd的挥发率达到98%，根据等温动力学及阿累尼乌斯方程，对Pb，Cd的挥发率随时间变化的规律进行动力学模拟，得到较好的线性拟合效果，其中，Pb挥发反应的表观活化能E为88.73 kJ/mol，Cd挥发反应可以分2个部分：1 200℃以下的表观活化能E为61 kJ/mol；1 250℃以上的表观活化能E为184.6 kJ/mol。
    Abstract: In this study, lead and cadmium oxide reagents were added to the cement raw meal to produce clinkers. The volatile rates of lead and cadmium were considered as the main index. In order to investigate the volatile characteristics of these two heavy metals related to time under isothermal conditions during co-processing in cement kilns, thermogravimetric analysis, clinker sintering and clinker digestion were conducted. The results indicate that the volatile rates of Pb and Cd both increase with increasing of temperature and time. The volatile rate of Pb is 96%, and Cd is 98%. According to the kinetics of isothermal and Arrhenius equation, the dynamic simulation was utilized to describe the relation between volatile rate and time. The apparent kinetic activation energy of Pb is 88.73 kJ/mol, and the volatile reaction of Cd can be divided into two parts: the apparent activation energy is 61 kJ/mol below 1 200℃ and 184.6 kJ/mol above 1 250℃.
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出版历程
  • 收稿日期:  2013-09-07
  • 刊出日期:  2013-12-08

水泥窑协同处置过程中Pb、Cd的挥发特性

  • 1.  北京科技大学土木与环境工程学院, 北京 100083
  • 2.  中国环境科学研究院固体废物 污染控制技术研究所, 北京 100012
  • 3.  环境保护部环境保护对外合作中心, 北京 100035
  • 收稿日期:  2013-09-07
基金项目:

环保公益性行业科研专项（201209023）

中挪合作项目（CHN215009/059）

摘要: 对铅、镉2种重金属的氧化物开展了热重实验、熟料煅烧以及熟料消解实验，以重金属的挥发率为主要指标，研究了水泥窑协同处置过程中铅、镉在等温条件下随时间的挥发特性。结果表明，2种重金属的挥发率均是随温度的升高，时间的增加而增大。Pb的挥发率为96%，Cd的挥发率达到98%，根据等温动力学及阿累尼乌斯方程，对Pb，Cd的挥发率随时间变化的规律进行动力学模拟，得到较好的线性拟合效果，其中，Pb挥发反应的表观活化能E为88.73 kJ/mol，Cd挥发反应可以分2个部分：1 200℃以下的表观活化能E为61 kJ/mol；1 250℃以上的表观活化能E为184.6 kJ/mol。

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