为了降低电解脱硫成本，采用 NaOH 溶液作为电解液，研究电解液循环对铝土矿电解过程的影响。研究发现随着电解液循环次数增多，电极腐蚀程度、电解电压、脱硫率及母液 pH 值均无明显变化。另外，电解后电解液中含有一些过渡态的含硫离子，如S 2O-23和SO ，最终被氧化为-23 SO 溶于水中，这些离子的生成不影响电-24解液的回收利用。
To lower the cost of bauxite electrolysis desulfurization using NaOH solution as the supporting electrolyte, effects of electrolyte recycling on bauxite electrolysis desulfurization were investigated. The results indicate that electrode corrosion, cell voltage, the desulfurization rate and the pH value of the electrolyte have no obvious changes with the increase of cycle times. Additionally, there were some transitive valence S-containing ions in electrolyte after the electrolysis, such as SO ,-2 3 S 2O-2 3 . However, most of the sulfur in bauxite was eventually oxidized into SO into the electrolyte, and these S-containing ions did not-2 4 affect the recycling utilization for electrolyte.
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