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采用电解精炼 区域熔炼法 ,获得了 99 9999%高纯铟。从理论上探讨了采用区域熔炼法进一步提高铟的纯度的原理。采用In2 (SO4 ) 3～H2 SO4 体系 ,控制电解液pH为 2～ 3 ,In含量 80～ 10 0g·L- 1 ,电流密度 80～ 10 0A·m- 2 ,温度为 2 0～ 3 0℃ ,进行一次电解精炼 ,可得到纯度接近 99.999%的高纯铟。以电解精炼铟为原料进行区域熔炼 ,对熔体进行磁力搅拌 ,控制较低的区熔速度 ,可获得 99.9999%以上的高纯铟
Using electrolytic refining zone melting method, 99 9999% high purity indium was obtained. The principle of using regional melting method to further improve the purity of indium is theoretically discussed. The In2 (SO4) 3 ~ H2SO4 system was used to control the electrolyte pH to 2 ~ 3, the In content 80 ~ 100g · L-1, the current density 80 ~ 100A · m-2 and the temperature 20 ~ 30 ℃ , An electrolytic refining, available purity of nearly 99.999% of high-purity indium. Indium refining electrolysis as a raw material for regional melting, the melt magnetic stirring to control the lower melting zone rate can be obtained more than 99.9999% of high-purity indium