超声强化钒铬滤饼湿法浸出行为研究  

Leaching behavior of vanadium-chromium residue enhanced by ultrasonic

作　　者：龚倩 王星星 金贵炫 黄金磊 唐丹 黄辉胜[1] 李兵 石文兵[1] 林银河 彭浩 Gong Qian;Wang Xingxing;Jin Guixuan;Huang Jinlei;Tang Dan;Huang Huisheng;Li Bing;Shi Wenbing;Lin Yinhe;Peng Hao(College of Chemistry and Chemical Engineering,Yangtze Normal University,Chongqing 408100,China)

机构地区：[1]长江师范学院化学化工学院,重庆408100

出　　处：《钢铁钒钛》2023年第6期32-37,共6页Iron Steel Vanadium Titanium

基　　金：重庆市大学生创新创业训练计划项目(No.S202310647008);重庆市自然科学基金面上项目(No.cstc2021jcyjmsxmX0129);重庆市教委科学技术研究项目(No.KJQN202201406)。

摘　　要：钒铬滤饼中钒主要以低价态的形式存在,在碱性条件下难以直接溶出,通过焙烧-浸出的方式进行回收会带来较大能耗。引入超声对钒铬滤饼的碱性湿法浸出过程进行强化,实现低价钒向高价钒的氧化转化,可提高钒的浸出率。试验研究了氢氧化钠用量、反应温度、反应时间、反应液固比和搅拌转速等参数对钒浸出率的影响,结果表明,引入超声技术可以有效强化钒铬滤饼的湿法浸出过程,提高钒的浸出率。与直接碱性浸出相比,超声强化浸出过程可以使钒的浸出率提高34个百分点。在最佳反应条件下(氢氧化钠用量为m(NaOH)/m(钒铬滤饼)=0.5 g/g,反应温度为90℃,搅拌转速为500 r/min,反应时间为60 min,液固比为5 mL/g,超声频率为40 kHz),钒的浸出率可达96.9%。Vanadium is existed as low-valence in the vanadium-chromium residue,it is hard to leach out in alkaline medium,high-energy consumption is accompanied by roasting-leaching process.In this paper,ultrasonic was introduced to enhance the leaching process of vanadium-chromium residue to oxidize the low valence vanadium to high valence and make contribute to high leaching efficiency.The effects of NaOH dosage,reaction temperature,reaction time,liquid-to-solid ratio and stirring rate on the leaching efficiency of vanadium were investigated.The results show that the leaching process is significantly enhanced by ultrasonic leaching and the leaching efficiency of vanadium is improved.Compared with direct alkaline leaching,the leaching efficiency of vanadium is increased about 34 percentage.The leaching rate of vanadium is up to 96.9%under the optimal conditions including the dosage of NaOH at m(NaOH)/(residue)=0.5 g/g,reaction temperature of 90℃,stirring rate at 500 r/min,reaction time of 60 min,liquid-to-solid ratio at 5 mL/g and ultrasonic frequency at 40 kHz.

关 键 词：提钒 钒铬滤饼 碱性浸出 超声强化 浸出率 

分 类 号：TF841.3[冶金工程—有色金属冶金]