ZnFe_2O_4与CaCl_2氯化反应机理  

Chlorination reaction mechanism between ZnFe_2O_4 and CaCl_2

作　　者：郭婷[1,2] 胡晓军[1,3] 侯新梅[1,3] 松浦宏行[4] 月桥文孝 周国治[1,3] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]首钢技术研究院,北京100043 [3]北京科技大学生态与循环冶金教育部重点实验室,北京100083 [4]东京大学大学院新领域创成科学研究科

出　　处：《北京科技大学学报》2011年第4期474-478,共5页Journal of University of Science and Technology Beijing

基　　金：国家科技支撑计划资助项目(2006BAE03A10);北京科技大学冶金与生态工程学院青年创新基金资助项目

摘　　要：利用CaCl2为氯源与含锌冶金粉尘的重要组分ZnFe2O4进行反应,并利用扫描电镜(SEM)和能量色散谱仪(EDS)分析了ZnFe2O4粉体与CaCl2反应面和反应产物微观形貌的变化,讨论了ZnFe2O4与CaCl2的反应机理.认为反应过程包括一个固液反应和气体挥发过程.ZnFe2O4颗粒被熔融CaCl2包裹,在固液界面发生氯化反应,生成的ZnCl2溶解在CaCl2液膜中,并在气液界面挥发逸出,而CaFe2O4的产物层不断增大,同时伴随着多个颗粒间的黏结和融合长大.CaCl2 was used to chlorinate ZnFe2O4,an important component in metallurgical dust.The changes of the reaction surface between ZnFe2O4 and CaCl2 and the microstructure of reaction products were investigated by scanning electron microscopy（SEM） and energy dispersive spectrometry（EDS）,and the reaction mechanism was discussed.It is considered that the whole process includes a solid-liquid reaction and a gas volatilization.ZnFe2O4 particles are coated by melted CaCl2 and the chlorination reaction occurs at the liquid-solid interface,the product ZnCl2 dissolves in the liquid membrane of CaCl2 and escapes from the gas-liquid interface.During the chlorination reaction,the product layer of ZnFe2O4 increases companying with the adhering and growing up of the particles.

关 键 词：冶金工业 固体废弃物 粉尘 氯化 反应机理 

分 类 号：TF09[冶金工程—冶金物理化学] TF01