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%.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2004年第5期797-801,共5页
Journal of Central South University:Science and Technology
