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针对现有钒提取技术存在的焙烧过程能耗高,回收率低的问题,提出采用钛白废酸无焙烧加压浸出钒渣提钒的新技术,对该技术中浸出液中钒铁萃取分离过程进行研究,结果表明:在p H=-0.86的条件下,萃取剂N235体积分数25%,有机相与水相体积比(VO/VA)=5∶1,萃取震荡时间为10 min,添加氯化钠使氯离子浓度达到140 g/L的条件下,单级铁萃取率为34.15%,钒萃取率低于2%,铁钒分离系数达42.54,可实现高铁浸出液中铁钒有效分离。
Aiming at the problems of high energy consumption and low recovery rate of the existing vanadium extraction technology, a new technology of extracting vanadium from vanadium slag by non-roasting titanium dioxide waste acid was proposed. The vanadium-iron extraction and separation process The results showed that under the condition of p H = -0.86, the volume fraction of extractant N235 was 25%, the volume ratio of organic phase to aqueous phase (VO / VA) was 5:1, the extraction oscillation time was 10 min, Under the condition of sodium chloride concentration of 140 g / L, single-stage iron extraction rate is 34.15%, vanadium extraction rate is less than 2% and iron-vanadium separation coefficient is 42.54, which can effectively separate iron-vanadium from high-iron leaching solution.