电炉渣在NH_4Cl溶液浸出过程的自阻模型  

Kinetic model with self-resistance factor for electric arc furnace slag leaching in NH_4Cl solution

作　　者：张慧宁[1] 赖朝彬[1] 崔健 

机构地区：[1]江西理工大学冶金与化学工程学院,江西赣州341000 [2]宁波钢铁集团有限公司,浙江宁波315000

出　　处：《有色金属科学与工程》2014年第2期39-43,共5页Nonferrous Metals Science and Engineering

基　　金：国家十一五科技支撑计划项目(2006BAE03A07)

摘　　要：针对电炉渣在NH4Cl溶液中的浸出过程，重点研究了电炉渣粒径、浸出温度、浸出时间和NH4Cl浓度对Ca2＋浸出率的影响规律，并建立了带有自阻系数的反应过程动力学模型.结果表明，电炉渣中钙离子的转化率随着浸出温度和氯化铵浓度的增大而增大，浸出反应过程的自阻系数为1.0307-1.0617，反应过程的活化能约为15.046 kJ/mol，表明该实验条件下电炉渣在氯化铵溶液中的浸出反应过程控速机制为扩散控速.Aiming at the leaching process of NH4Cl solution in EAF slag, the influence rule of the particle size and leaching temperature and time,as well as NH4Cl concentration on leaching rate of Ca2＋ are studied, and leaching kinetics model with self-resistance factor is established. Results show that the conversion rate of element calcium increases both with the increase of the leaching temperature and NH 4Cl concentration. The self-resistance factor for leaching process is in the range of 1.030 7 and 1.061 7 and the activation energy of leaching reactions is about 15.046 kJ/mol which indicates that solid membrane diffusion limits EAF slag leaching process under the experimental condition.

关 键 词：电炉渣 氯化铵溶液 浸出 自阻系数 动力学模型 

分 类 号：TF703.6[冶金工程—钢铁冶金]