电炉渣醋酸溶液浸出过程动力学模型  

Kinetic Model for Electric Furnace Slag Leaching in CH_3COOH Solution

作　　者：张慧宁[1] 贺东风[1] 徐安军[1] 单多[1] 李建立[1] 

机构地区：[1]钢铁冶金新技术国家重点实验室,北京科技大学冶金与生态工程学院,北京100083

出　　处：《硅酸盐学报》2013年第1期96-102,共7页Journal of The Chinese Ceramic Society

基　　金：国家“十一五”科技支撑项目(No.2006BAE03A07)资助

摘　　要：建立了粒度为0.038～0.075 mm电炉渣在0.5 mol/L醋酸溶液中恒温水浴浸出过程的动力学模型和浸出产物Ca2+的溶解度模型。研究表明:试验条件下浸出产物的溶解度不是限制浸出反应动力学的控速环节,浸出液中钙离子的转化率随着温度和浸出液浓度的升高而增大;电炉渣醋酸浸出过程动力学模型可用带有自阻系数的Drozdov方程来描述,通过实验数据拟合,模型自阻系数在1.35～1.45范围递增,曲线拟合的相关度大于0.99。根据Arrhenius方程计算得到,电炉渣醋酸浸出过程反应表观活化能为1.743kJ/mol,表明电炉渣醋酸浸出过程是由固态膜扩散控速的。A leaching kinetic process for electric furnace （EAF） slag with the particle sizes of 0.038-0.075 mm in 0.5 mol/L CH3COOH（HAC） solution at a certain temperature was investigated, and the corresponding production Ca2＋ solubility model was proposed. The results show that the leaching production solubility is not a controlling parameter of leaching process. The conversion rate of element calcium increased with increasing both the leaching temperature and HAC concentration. A leaching kinetics model could be described by the Drozdov equation with a self-resistance coefficient. The simulated self-resistance coefficient was similar to the experimental data in the range of 1.35-1.45 with the correlation degree of 〉 0.99. The activated energy of leaching reactions calculated according to the Arrhenius equation was 1.743 kJ/mol. It was indicated that the solid membrane diffusion could restrict the EAF slag leaching process.

关 键 词：电炉渣 醋酸 浸出 溶解度 动力学模型 

分 类 号：TQ172[化学工程—水泥工业]