摘要
对高镁磷尾矿在硫酸中的溶解动力学进行了研究。考查了硫酸质量分数及反应温度对酸解过程的影响；选用考虑了自阻化因素的德罗兹多夫方程1/tln100/100-α-βα%/t=k描述酸解过程的动力学。研究结果表明：反应速率常数随温度的升高而增加，随硫酸质量分数的增加而减小。该反应属于扩散控制．反应活化能约为4～7kJ／mol。
The dissolution kinetics of phosphate tailings with high magnesium content was studied. The influences of sulfuric acid concentration and reaction temperature on acid digestion process were discussed. The Drozdov equation that took into account the self-impeding effect was selected to simulate the dissolution kinetics. The results showed that the deeomposition rate increased as the temperature moved up, and decreased as sulfuric acid concentration increased. The reaction was a diffusion control process. Its apparent activation energy was 4-7kJ/mol.
出处
《化工矿物与加工》
CAS
北大核心
2006年第10期1-3,19,共4页
Industrial Minerals & Processing
基金
湖北省教育厅2004年科学技术研究重点项目(2004X089)
关键词
高镁磷尾矿
硫酸
溶解动力学
phosphate tailings with high magnesium content
sulfuric acid
dissolution kinetics
