钒铬液水热水解法提钒技术研究  

Vanadium Extraction from Vanadium-chromium Solution by Hydrothermal-hydrolysis Precipitation

作　　者：高官金[1] Gao Guanjin(Pangang Group Research Institute Co. , Ltd. , State Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Panzhihua 617000, Sichuan, China)

机构地区：[1]攀钢集团研究院有限公司、钒钛资源综合利用国家重点实验室,四川攀枝花617000

出　　处：《钢铁钒钛》2017年第5期15-19,共5页Iron Steel Vanadium Titanium

基　　金：国家重点基础研究发展计划“973”项目(2013CB632600)

摘　　要：针对高铬钒渣氧化钠化焙烧—水浸提钒铬工艺获得钒铬液的特点,解决常规铵盐沉钒工艺产生高Na^+、高NH_4^+废水难处理的问题,选用水热法水解沉钒技术从高铬高钠的钒液中高效分离提取出钒,为后续提铬及废水处理创造了有利条件。分别研究了水解沉钒温度、pH值和反应时间与沉钒率和铬损失率的关系,结果表明:在反应pH值1.8,温度120℃,反应时间180 min的条件下可获得接近90%的沉钒率,水解产物经打浆洗涤—煅烧后即制得满足98粉钒标准(YB/T 5304—2011)要求的氧化钒产品。Efficient extraction and separation of vanadium from vanadium solution containing high concentration of chromium and sodium was investigated by hydrothermal-hydrolysis method to solve the treatment difficulties of wastewater with high concentration of Na~＋ and NH_4~＋ produced in traditional vanadium precipitation by ammonium salts and provide favorable conditions for the following chromium extraction,according to the characteristics of vanadium-chromium solution obtained by process of sodium roasting-water leaching of high-chromium vanadium slag for vanadium and chromium extraction.The relationship between parameters（ hydrolysis temperature,p H and reaction time） and rates of vanadium precipitation and chromium loss was studied.The results show that near 90% of vanadium precipitation rate and vanadium pentoxide（ V2 O5） satisfying YB/T 5304—2011 standard which is produced by calcination of the waterwashed hydrolysis product can be obtained with reaction at 120 ℃ for 180 min in p H = 1.8 system.

关 键 词：提钒 钒铬液 水热水解法 沉钒率 

分 类 号：TF841.3[冶金工程—有色金属冶金]