Abstract
Thepaper describes the kinetics of MnO2from electrolytic manganese (EM) anode slimesleached by SO2.The effects of stirring speed,SO2concentration,temperature, and partical size on the leaching rate of manganese are discussed. Experimental results indicated that the leaching of MnO2by SO2is 0.86 order with respect to SO2concentration. 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 MnO2and pyrolusite, the differ-ence among the three MnO2simples reaction with SO2was identified.
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