硫酸浸取废SCR催化剂中钒的过程研究
Study on the Process of Sulfuric Acid Leaching Vanadium of Waste SCR Catalyst
摘要: 本文采用湿法冶金的方法，用Na2SO3做还原剂，采用硫酸溶液一次浸取废SCR催化剂中的钒，得出最佳浸出条件后再利用两段逆流浸出，将废SCR催化剂中钒的浸出率进一步提高。余下未溶解的固体主要成分为TiO2，从而将TiO2分离，得到粗制钛钨粉产品。通过实验确定最佳工艺条件为浸出温度80℃，浸出时间60 min，硫酸浓度8%，液固比5:1，亚硫酸钠浓度7% (相对于催化剂用量)，在此最佳工艺条件下，得到钒浸出率为79.74%，两段逆流浸出约提高浸出率9%。
Abstract: In this paper, the hydrometallurgical method is used, Na2SO3 is used as the reducing agent, and the vanadium in the waste SCR catalyst is leached with sulfuric acid solution at one time. After obtaining the optimal leaching conditions, two stages of countercurrent leaching are used to further increase the leaching rate of vanadium in the waste SCR catalyst. The main component of the remaining undissolved solid is TiO2, so that TiO2 is separated to obtain a crude titanium tungsten powder product. The optimal process conditions were determined through experi-ments: leaching temperature 80˚C, leaching time 60 min, sulfuric acid concentration 8%, liq-uid-solid ratio 5:1, and sodium sulfite concentration 7% (relative to the catalyst amount). The vanadium leaching rate is 79.74%, and the two-stage countercurrent leaching improves the leaching rate by about 9%.
文章引用：韩奇, 冯丽娟, 姚硕, 陈彦成. 硫酸浸取废SCR催化剂中钒的过程研究[J]. 化学工程与技术, 2020, 10(3): 127-137. https://doi.org/10.12677/HJCET.2020.103018

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