N235从废催化剂沉钒废液中回收钒

N235 Recovers Vanadium from Waste Solution of Vanadium Precipitation by Spent Catalyst

摘要: 这是一篇冶金工程领域的论文。针对陕西某炼锌厂废催化剂的沉钒废液，通过溶剂萃取法除杂并回收沉钒废液中的钒，考查N235体积分数、萃取相比、萃取时间、萃取级数等对钒萃取率的影响。结果表明：采用30%N235+5%TBP+65%的磺化煤油的萃取体系经过四级逆流萃取，萃取相比V_O/V_A=2∶1，萃取时间t=5 min，钒的萃取率为95.68%；反萃取剂Na₂CO₃体积分数为5%，反萃相比V'_O/V'_A=4∶1，反萃时间t=4 min，经三级逆流反萃取，钒的反萃取率为98.25%。

Abstract: This is an article in the field of metallurgical engineering. For the vanadium precipitation waste liquid of a waste catalyst in a zinc smelter in Shaanxi, the vanadium in the vanadium precipitation waste liquid was recovered by solvent extraction method. The effects of N235 volume fraction, extraction ratio, extraction time and extraction stage on the vanadium extraction rate were investigated. The results showed that the extraction system with 30%N235+5%TBP+65% sulfonated kerosene was used for four-stage countercurrent extraction, the extraction ratio of V_O/V_A= 2∶1, the extraction time was t=5 min, and the extraction rate of vanadium was 95.68%. The volume fraction of Na₂CO₃ was 5%, the extraction ratio of V'o/V'_A =4∶1, the extraction time was t=4 min, and the extraction rate of vanadium was 98.25% after three-stage counter-current extraction.