CAJ | 학술논문

针对攀枝花某企业产出的钒渣，以碳酸氢铵水溶液为浸出剂，研究了从钒渣中浸出钒的宏观动力学，考察了搅拌速度、反应温度、浸出剂质量浓度和颗粒粒度对钒浸出率的影响。结果表明：钒浸出过程遵循“未反应收缩核模型”，反应主要受固体产物层扩散控制；钒浸出率随液固体积质量比增大、搅拌速度增大、反应温度升高及浸出剂质量浓度增大、颗粒粒度减小而提高。根据试验数据，建立了宏观动力学模型，求得反应表观活化能 E＝18．0 kJ／mol ，指前因子 A＝0．713，确立了宏观动力学方程。
침대반지화모기업산출적범사，이탄산경안수용액위침출제，연구료종범사중침출범적굉관동역학，고찰료교반속도、반응온도、침출제질량농도화과립립도대범침출솔적영향。결과표명：범침출과정준순“미반응수축핵모형”，반응주요수고체산물층확산공제；범침출솔수액고체적질량비증대、교반속도증대、반응온도승고급침출제질량농도증대、과립립도감소이제고。근거시험수거，건립료굉관동역학모형，구득반응표관활화능 E＝18．0 kJ／mol ，지전인자 A＝0．713，학립료굉관동역학방정。
In this w ork ,vanadium‐containing steel slag ,provided by a certain company in Panzhihua City ,Sichuan Province ,China ,was used as the raw material .The leaching kinetics of vanadium from the vanadium‐containing steel slag was systematically investigated using ammonium bicarbonate solution as leaching agent .T he effects of stirring speed ,temperature ,leaching agent concentration and slag particle size on leaching of vanadium w ere investigated .T he results show that the leaching process is controlled by diffusion through product layer and accords with the shrinking core model .Therefore , the higher liquid‐solid ratio ,stirring speed ,temperature and concentration of leaching agent ,or the smaller particle size ,the higher is leaching rate of vanadium .By means of experimental data ,an empirical equation for the leaching process is established .T he activation energy is calculated as 18 .0 kJ/mol ,the frequency factor is calculated as 0 .713 .The kinetic equation is determined .