摘要
The influence of mechanical activation on the leaching kinetics of arsenopyrite was studied using a planetary centrifugal mill. It shows that mechanical activation can enhance the leaching process of arsenopyrite in a nitric sulfate acidic solution. The leaching ratio within 20?min leaching time can increase from 2% to 80% ～ 100%; 10 and 20 minutes’ activation can depress the apparent activation energy of leaching reaction from 54.5?kJ/mol to 39.0?kJ/mol and 34.0?kJ/mol, respectively. This means that the leaching reaction becomes little dependent on temperature, and arsenopyrite can change from refractory to flexible one; mechanical activation also increases the interplanar distance between crystal faces. The displacement of atoms from its equilibrium position indicates the increase in inner energy.
The influence of mechanical activation on the leaching kinetics of arsenopyrite was studied using a planetary centrifugal mill. It shows that mechanical activation can enhance the leaching process of arsenopyrite in a nitric sulfate acidic solution. The leaching ratio within 20?min leaching time can increase from 2% to 80% ～ 100%; 10 and 20 minutes' activation can depress the apparent activation energy of leaching reaction from 54.5?kJ/mol to 39.0?kJ/mol and 34.0?kJ/mol, respectively. This means that the leaching reaction becomes little dependent on temperature, and arsenopyrite can change from refractory to flexible one; mechanical activation also increases the interplanar distance between crystal faces. The displacement of atoms from its equilibrium position indicates the increase in inner energy.
出处
《中国有色金属学会会刊：英文版》
CSCD
2002年第2期330-333,共4页
Transactions of Nonferrous Metals Society of China
基金
Project (No .5 94740 12 )supportedbytheNationalNaturalScienceFoundationofChina
关键词
机械活化
机械化学
含砷黄铁矿
浸析
动力学
mechanical activation
mechanochemistry
arsenopyrite
leaching
kinetics
