摘要
针对现有工艺中污染严重的沉钒工艺开展了氢还原制备钒氧化物清洁冶金新过程的应用研究。氢气可以有效地将偏钒酸钠还原为钒的氧化物,其最佳反应条件为:净化液的钒浓度为30.33 g/L,体积为1 L,反应温度为120℃,氢气压力为1.5 MPa,溶液pH=8.0,反应时间为3 h,搅拌速度为300 r/min,此时溶液中剩余的钒浓度为0.92 g/L,偏钒酸钠的转化率为97.0%。该技术对钒产业的可持续发展具有重要意义,是一种可推广的先进适用技术,经济及环保效益显著。
A New process of preparing vanadium oxides by hydrogen reduction of sodium metavanadate for clean metallurgy was developed in view of serious pollution problem caused by existing vanadium precipitating process. The sodium metavanadate could be effectively reduced to vanadium oxide by hydrogen. Under the following optimal reaction condition with the concentration of vanadium in the purified liquor at 30.33 g/L, the total solution volume of 1 L at pH of 8.0, hydrogen pressure at 1.5 MPa, after reaction at a temperature 120 ℃ for 3 h with stirring rate of 300 r/min, the concentration of residual vanadium in the solution is about 0.92 g/L and the conversion rate of sodium metavanadate reaches 97.0%. This technology is of great significance for sustainable development of vanadium industry, but also can brings remarkable economic and environmental benefits. It can be widely spread.
出处
《矿冶工程》
CAS
CSCD
北大核心
2014年第3期94-96,共3页
Mining and Metallurgical Engineering
基金
湖南省科技计划项目(湘财企指(2012)42号2012SK3278)
关键词
偏钒酸钠
氢还原
清洁冶金
钒
五氧化二钒
sodium metavanadate
hydrogen reduction
clean metallurgy
vanadium
vanadium pentoxide
