摘要
对高镁磷尾矿在磷酸中的溶解动力学进行了研究,考查了磷酸中P2O5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/tln(100/(100-α))-β((α%)/t)=k来描述该过程的酸解动力学。研究结果表明:反应速率常数随温度的升高和磷酸中P2O5质量分数的增加而增加。该反应属于扩散控制,反应活化能约为29.2kJ/mol。
The dissolution kinetics of phosphate tailings with high magnesium content in phosphoric acid was studied. The influences of P2O5 concentration in phosphoric acid and reaction temperature on acid digestion process were diseussed. The Drozdov equation that took into account the self-impeding effect was selected to simulate the dissolution kinetics. The results showed that the decomposition rate increased as P2O5 concentration in phosphoric acid increased and the temperature moved up. The reaction was a diffusion control process.Its apparent activation energy was 29.2kJ/mol.
出处
《化工矿物与加工》
CAS
北大核心
2007年第4期1-3,共3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
磷酸
溶解动力学
phosphate tailings with high magnesium content
phosphoric acid
dissolution kinetics
