悬浮电解制备二氧化锰的研究

Preparation of Manganese Dioxide by Suspension Electrolysis

介绍一种使用锰钛合金做阳极并在电解液中加入悬浮颗粒(CMD或EMD)制备二氧化锰的有效方法。首先,在试验过程中分别采用纯钛、钛合金和钛锰合金做电解阳极材料,通过实验对比表明:采用锰钛合金做阳极材料,可以实现阳极在高电流密度下不易钝化,电解电流效率高,并且具有所生产二氧化锰含量高,铁含量低等优点;其次在选取电解液时,通过普通电解液和加入悬浮颗粒电解液进行对比,加入悬浮颗粒的电解液可以解决在电解过程中耗电量高,电解电流效率低,所生产二氧化锰含量低等缺陷。在试验过程中得出悬浮颗粒的最佳加入量:CMD加入量为0.075 g.L-1,EMD加入量为0.1 g.L-1,当悬浮颗粒加入量不低于0.05 g.L-1时,二氧化锰的含量均高于91%,符合电池用无汞碱性锌-锰二氧化锰电解二氧化锰含量要求,并且悬浮颗粒加入越多二氧化锰含量越高,电解产品中硫酸根就越容易清洗。

An effective method of manganese dioxide preparation using the manganese titanium alloy as anode and adding suspension pellet of CMD or EMD in the electrolyte was introduced.Pure titanium,titanium alloy and titanium manganese alloy were used as an-ode respectively.The results showed that: there was not easy to produce anodic passivation at high current density using-manganese ti-tanium alloy as anode,and had the advantages of high efficiency of electrolysis current,high content of manganese dioxide,and low ...