复杂锑铅矿矿浆电解电极反应

Electrode Reaction of Refractory Sb-Pb Concentrate in Slurry Electrolysis

通过测定极化曲线 ,研究复杂锑铅矿矿浆电解过程的电极反应。FeCln( 2 -n) 阳极氧化过程 η在 60～ 110mV ,受电化学反应控制 ,η在 10 0～ 180mV属混合反应控制 ,η在 160～ 2 2 0mV ,受扩散控制。试验条件下 ,锑铅矿矿浆电解中 ,阴极上发生的主要是Sb络离子的还原反应 ,H2 不会析出。虽然阴极液中FeCln( 3-n) 的还原不可避免 ,但由于量很少 ,对阴极电流效率的影响较小。铅在钛阴极的析出可以忽略 ,矿浆电解可以实现锑的选择性提取。

The reactions occurring on the electrodes are studied by the measurement of polarization curves The control steps of anodic oxidation reaction of  FeCl n (2-n)  are electrochemical, incorporation of reaction and diffusion, and diffusion respectively in the potential ranges of 60～110, 100～180 and 160～220 mV On the experiment condition, the reaction of  SbCl n (3-n)  reduction is the dominant reaction on the cathode, the H 2 deposition on the cathode is impossible The effect of the  FeCl n (3-n)  cathode reduction on the current efficiency is unimportant since its content is few, in spite of ineluctability of the reduction reaction The antimony can be selectively extracted by the Slurry Electrolysis Process, because the reduction of  PbCl n (2-n)  on titanium cathode can be ignored