摘要
本文对织金新华磷矿进行酸解动力学研究,主要研究了反应温度、液固比对P2O5浸出率的影响。试验结果表明,随着反应温度、硫酸浓度的增加,磷的浸出率均有增加。且反应速率常数也增大。采用固膜扩散控制过程的未反应核收缩模型,对试验数据拟合的很好,得到受固膜扩散控制的动力学方程,其活化能KJ/mol,频率因子s-1,表明硫酸分解织金新华磷矿的过程属于固膜扩散控制过程。
The effects of reaction temperature and liquid - solid proportion on P2O5 leaching rate were studied mainly in this paper. The results showed that, with the temperature and the concentration of sulfuric acid increasing, the phosphorus leaching rate has increased, and the phosphorus rate constant also increases. Adopt the unreactedcore shrinking model of Solid-film process control, fitting the experimental data. Gained the Dynamic equation of Solid- film proliferation control：
1-（1-XB）^2/3-2/3XB=2.925e^-13.95/RT t
And that Ea= 13.95KJ/mol, A= 2. 925s^-1, belong to the Solid-film process control.
出处
《四川有色金属》
2008年第4期23-26,22,共5页
Sichuan Nonferrous Metals
基金
贵州省自然科学基金(项目编号:黔科合J字[2005]2098)
关键词
磷矿酸解
动力学模型
固膜扩散控制
hosphate rock acid decomposition
kinetics model
Solid- film diffusion control process
