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考察了锌对AlCl3-BMIC离子液体电解槽炼铝的影响。结果表明:锌的氧化电位相对于铝为0.23V,铝中含锌其钝化电位负移。随着阳极锌含量增加,阴极铝沉积物中的锌含量升高,阳极含锌量为4%时,阴极中锌含量只有阳极含量的1/62,电流效率在94%以上,能耗在1.58kWh/kg-Al～1.68kWh/kg-Al;随着离子液体中Zn(II)的增加,阴极沉积物锌含量增加,铝电沉积的电流效率会有少量的降低,槽电压和能耗变化不大。SEM研究发现,随着沉积层锌含量的增加,晶粒细化,沉积层表面更加平整致密。
The effect of zinc on aluminum production in AlCl3-BMIC ionic liquid electrolyzers was investigated. The results show that the oxidation potential of zinc is 0.23V with respect to aluminum, and the negative passivation potential of zinc with zinc is negative. With the increase of anode zinc content, the content of zinc in the cathode aluminum deposit increased. When the anode zinc content was 4%, the cathode zinc content was only 1/62 of the anode content, the current efficiency was above 94% and the energy consumption was 1.58 With the increase of Zn (II) in the ionic liquid, the zinc content in the cathode sediment increases, the current efficiency of the electrodeposited aluminum decreases slightly, and the variation of the cell voltage and energy consumption Not big. SEM study found that, with the deposition of zinc content increases, the grain refinement, the deposition surface more smooth.