碱性含钒溶液除硅实验研究

Silicon Removal From the Alkali Leach Liquor

本文的研究目的是除去碱性含钒浸出液中的杂质硅,得到较纯的含钒溶液。通过实验得出:除硅试验应保持在90℃温度下,加入20%硫酸铝溶液量为原料液体积的2%,终点p H值8.5为宜,滤渣用p H=10的热水洗涤。在此条件下,除硅率可达95%以上,钒回收率在98%以上。

This study is aimed to remove the silicon from alkaline leaching solution containing vanadium,and to obtain the pure vanadium containing solution. The results show that under the optimal conditions,that is adding 20% Al2（ SO4）3solution by 2% the volume of the alkali leach liquor at 90℃,controlling the final p H value at 8. 5,the residue with p H = 10 hot water washing. Under the above conditions,the silicon removal rate is up to 95 % and the recovery rate of vanadium is more than 98%.