Mn^(3+)/Mn^(2+)间接电氧化法分解辉钼矿  

Indirect Electro-oxidation of Molybdenite by Mn^(3+)/Mn^(2+)

作　　者：符剑刚[1] 钟宏[1] 黄永平[1] 卜向明[1] 

机构地区：[1]中南大学化学化工学院,湖南长沙410083

出　　处：《中南大学学报（自然科学版）》2004年第5期797-801,共5页Journal of Central South University:Science and Technology

摘　　要：采用Mn3+/Mn2+间接电氧化法湿法分解辉钼矿。在强酸介质中,媒介Mn3+/Mn2+氧化能力很强,能将MoS2氧化分解为MoO3和硫酸,且锰离子可以循环利用。探讨了Mn3+/Mn2+间接电氧化法的工艺条件,结果表明:在H2SO4浓度为7mol/L,MnSO4浓度为0.5mol/L,电解电量为20A·h·g-1,电极间距15mm,阳极电流密度为800A·m-2,矿浆液固比为40,温度为55℃的条件下,钼的浸出率为88.5%。此外,对氧化浸出过程采用了超声波外场强化,Mo浸出率可以提高到92.3%。Indirect electro-oxidation of molybdenite concentrates by Mn^(3+)/Mn^(2+) was studied. Because of the strong oxidation capability of Mn^(3+)/Mn^(2+) redox couple in acid condition, MoS_2 was decomposed to MoO_3 and H_2SO_4, while Mn ion could be recycled in the redox system. The results show that under suitable conditions H_2SO_4 concentration 7 mol/L, MnSO_4 concentration (0.5 mol/L,) electrolytic quantity of electricity 20 A·h·g^(-1), electrode spacing 15 mm, anode current density 800 A/m^2, rate of liquid to solid 40, and 55 ℃, the Mo leaching ratio can reach (88.5%.) Using ultrasonic increases the Mo leaching ratio to 92.3%.

关 键 词：间接电氧化 辉钼矿 Mn^3+/Mn^2+ 超声波 浸出 

分 类 号：TF125.241[冶金工程—粉末冶金]