炼焦煤尾煤热解特性及动力学研究  

Characteristics and kinetics of the pyrolysis of coking coal tailings

作　　者：付兴民[1] 张玉秀[1] 郭战英[1,2] 刘海兵[1] 柳树成[1] 贾晋炜[1] 舒新前[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院,北京100083 [2]山西焦煤汾西矿业集团公司,山西介休032000

出　　处：《煤炭学报》2013年第2期320-325,共6页Journal of China Coal Society

基　　金：国家高技术研究发展计划(863)资助项目(2009AA06Z320);国家转基因生物新品种培育重大专项资助项目(2009ZX08009-130B);中央高校基本科研业务费专项资金资助项目(2010YH05)

摘　　要：基于炼焦煤尾煤和原煤的热解实验对比,研究热解终温、升温速率和高矿物质含量对炼焦煤尾煤热解特性的影响,并求解炼焦煤尾煤热解的动力学参数。结果表明：热解终温和升温速率对炼焦煤尾煤的热解过程有重要的影响,高温有利于尾煤中高分子有机物裂解和挥发分析出,但高矿物质含量使尾煤热解在850℃后终温作用不明显;炼焦煤尾煤中矿物质含量对其热解具有抑制作用,使尾煤热解过程向高温段推移;炼焦煤尾煤的热解过程可以用3个二级反应描述,通过动力学参数拟合计算结果得出炼焦煤尾煤热解反应活化能为54.7~131.1 kJ/mol。Based on the pyrolysis experiment comparison of coking-coal tailings and raw coking coal, the effect of final temperature, heating rate and high content of mineral in tailings on the pyrolysis of coking-coal tailings was studied, and the kinetic model of coking-coal tailings was established. The results show that the final temperature has great in- fluence on the pyrolysis of coking-coal tailings, with the increase of final temperature, the decomposition of railings and the precipitation of volatile become easy. After 850 ~C, the effect of final temperature begins to weaken due to the high- er content of mineral in tailings. Mineral in tailings has suppression effect on the total process of pyrolysis of tailings, and delay the pyrolysis of tailings to a high temperature. The process of tailings can be described as three second-order reactions and the active energy of tailings pyrolysis is 54. 7-131.1 kJ/mol.

关 键 词：炼焦煤尾煤 热解特性 动力学 

分 类 号：TD926.4[矿业工程—选矿] X705[环境科学与工程—环境工程]