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

Abstract:

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The paper describes the kinetics of MnO2 from electrolytic manganese (EM) anode slimesleached 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 re-action 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)^2/3=(k1/ρr){[SO2]0.86exp(-25700/RT)}t. Meanw-hile, comparative experiments were operated, using analytical class MnO2 and pyrolusite, the differ-ence among the three MnO2 simples reaction with SO2 was identified.

Info:

Periodical:

Advanced Materials Research (Volumes 233-235)

Edited by:

Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He

Pages:

532-536

DOI:

10.4028/www.scientific.net/AMR.233-235.532

Citation:

Y. F. Li et al., "Leaching Kinetics of MnO2 from Electrolytic Manganese Anode Slimes in the Presence of SO2", Advanced Materials Research, Vols. 233-235, pp. 532-536, 2011

Online since:

May 2011

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Price:

$35.00

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