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›› 2013, Vol. 13 ›› Issue (6): 1003-1007.

• 过程与工艺 • Previous Articles     Next Articles

Thermal Decomposition Kinetics of the Sludge from Pickling of Nickel Chromium Stainless Steel

LI Xiao-ming YANG Wen-tao LI Wen-feng CUI Ya-ru ZHAO Jun-xue LI Zhi-guo   

  1. College of Environmental Science and Engineering, Hunan University College of Environmental Science and Engineering, Hunan University Shenyang Aluminum and Magnesium Engineering and Research Institute College of Environmental Science and Engineering, Hunan University School of Metallurgical Engineering,Xi'an University of Architecture and Technology Shenyang Aluminum and Magnesium Engineering and Research Institute
  • Received:2013-04-17 Revised:2013-10-10 Online:2013-12-20 Published:2013-12-20
  • Contact: LI Xiao-ming

镍铬不锈钢酸洗污泥焙烧动力学

李小明 杨文涛 李文锋 崔雅茹 赵俊学 李志国   

  1. 西安建筑科技大学冶金工程学院 西安建筑科技大学冶金工程学院 沈阳铝镁设计研究院有限公司 西安建筑科技大学冶金工程学院 西安建筑科技大学冶金工程学院 沈阳铝镁设计研究院有限公司
  • 通讯作者: 李小明

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Abstract: TG and DTG techniques were used to analyze the thermal decomposition of pickling sludge of nickel chromium stainless steel. The temperatures of thermal decomposition in three stages were determined, 60~245, 665~760 and 890~1175℃, and their mass loss rate was 20%, 0.8% and 2.86%, respectively. The kinetic behaviors and reactions were studied under the conditions of water evaporation, sulfate conversion and fluoride evaporation. The differential method was used to calculate the kinetic parameters and determine the kinetic model of thermal decomposition. The calculated activation energy was 45.18, 159.16 and 224.13 kJ/mol, respectively. The most possible mechanism function was Jander equation and the pyrolysis mechanism three-dimensional diffusion with spherical symmetry.

Key words: nickel chromium stainless steel, pickling sludge, roasting, thermal decomposition, kinetic

摘要： 采用差热-热重方法研究了镍铬不锈钢酸洗污泥的热分解过程，各阶段的主要化学反应分别为水分蒸发、硫酸盐转化和氟化物挥发，反应温度分别为60~245, 665~760和890~1175℃，失重率分别为20%, 0.80%和2.86%. 采用微分法计算反应活化能分别为45.18, 159.16和224.13 kJ/mol，其最概然机理函数为Jander公式，热解机理属三维扩散，球形对称.

关键词: 镍铬不锈钢, 酸洗污泥, 焙烧, 热分解, 动力学

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