镍铬不锈钢酸洗污泥焙烧动力学  

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

作　　者：李小明[1] 杨文涛[1] 李文锋[2] 崔雅茹[1] 赵俊学[1] 李志国[2] 

机构地区：[1]西安建筑科技大学冶金工程学院,陕西西安710055 [2]沈阳铝镁设计研究院有限公司,辽宁沈阳110001

出　　处：《过程工程学报》2013年第6期1003-1007,共5页The Chinese Journal of Process Engineering

基　　金：陕西省自然科学基金资助项目(编号:2010JM7010);教育部留学回国人员科研启动基金资助项目;陕西省留学人员科技活动项目择优资助项目;陕西省教育厅科研计划基金资助项目(编号:09JK530)

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224．13kJ／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．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.

关 键 词：镍铬不锈钢 酸洗污泥 焙烧 热分解 动力学 

分 类 号：O643.12[理学—物理化学] TF09[理学—化学]