Leaching Kinetics of MnO2 from Electrolytic Manganese Anode Slimes in the Presence of SO2

被引：6
|
作者：
Li, Yingfen [1 ]
Ye, Hue [1 ]
Cao, Can [1 ]
He, Lina [1 ]
机构：
[1] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China
来源：
FUNDAMENTAL OF CHEMICAL ENGINEERING, PTS 1-3 | 2011年 / 233-235卷
关键词：
MnO2; SO2; electrolytic manganese anode slime; diffusion control; SULFUR-DIOXIDE; ORE;
D O I：
10.4028/www.scientific.net/AMR.233-235.532
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The paper describes the kinetics of MnO2 from electrolytic manganese (EM) anode slimes leached by SO2.The effects of stirring speed,SO2 concentration,temperature, and partical size on the leaching rate of manganese are discussed. Experimental results indicated that the leaching of MnO2 by SO2 is 0.86 order with respect to SO2 concentration. The apparent activation energy values for reaction is 25.7KJ/mol,which is consist with the values of activation energy for diffusion control. The kinetic equation can be expressed as: 1-(2/3)x-(1-x)boolean AND 2/3=(k(1)/rho r){[SO2](0.86)exp(-25700/RT)}t. Meanwhile, comparative experiments were operated, using analytical class MnO2 and pyrolusite, the difference among the three MnO2 simples reaction with SO2 was identified.
引用
收藏
页码：532 / 536
页数：5
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