孔隙结构参数对铝用炭阳极CO_2反应性的影响  

Effect of the pore structure parameters on CO_2 reactivity of carbon anode for aluminum electrolysis

作　　者：路美妙 薛济来[1] 刘轩 高守磊[2] 刘瑞[2] 郎光辉 Lu Meimiao;Xue Jilai;Liu Xuan;Gao Shoulei;Liu Rui;Lang Guanghui(School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China;Sunstone Development Co.,Ltd.,Beijing 100029,China)

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]索通发展股份有限公司,北京100029

出　　处：《轻金属》2018年第12期35-39,共5页Light Metals

基　　金：国家自然科学基金(51434005;51674025)

摘　　要：通过热重、图像分析等方法研究铝用炭阳极孔隙结构参数对其CO2反应性的影响,并结合灰色关联理论分析孔隙孔径范围与CO2反应性之间的关系。结果表明:炭阳极典型沥青相中平均孔隙率比石油焦相中高约两倍,其中沥青相中小孔径孔隙所占分数较高。炭阳极的孔隙率和平均孔径随CO2反应时间的延长而增大,反应9h时孔隙平均直径由原始的28. 89μm变为39. 15μm,孔隙形状因子和连通性数值亦随之提高。减少孔径范围0～40μm的孔隙对降低炭阳极CO2反应性和碳排放量具有重要作用。The effect of pore structure parameters on CO2 reactivity of carbon anode for aluminum electrolysis was studied by thermogravimetry and image analysis,and the relationship between pore size range and CO2 reactivity was analyzed by grey correlation theory.The results show that the average porosity in the typical pitch phase of carbon anode is about twice higher than that in petroleum coke,and the fraction of small pores in the pitch phase is higher.The porosity and average pore diameter of the carbon anode increased with the prolonged time of CO 2 reaction.After 9 hours of reaction,the average pore diameter changed from 28.89μm to 39.15μm,and the pore aspect and dendrites also increased.Reducing pores in the pore size range of 0~40μm plays an important role in reducing the CO2 reactivity and carbon emissions with carbon anodes.

关 键 词：图像分析 偏光显微镜 炭阳极 孔隙结构 灰色理论 

分 类 号：TQ175.714[化学工程—硅酸盐工业]