摘要
钒的水解沉淀与钒液的性质、杂质含量、浓度、温度及酸度有关,通过对高浓度钠化钒液除硅、水解沉钒、除钠试验研究,得到了纯度大于99.5%的五氧化二钒,达到了化工应用的要求,高浓度钠化钒液水解制备五氧化二钒的工艺是可行的。通过高浓度钠化钒液除硅研究得到了最佳工艺参数:硫酸铝与钒液中硅化学反应摩尔比为1.0、温度为95℃、p H值10.0、反应时间为60 min;通过水解沉钒得知,较佳钒浓度为50 g/L、p H值为2.5、温度为90℃,钒收率大于99%。
Process of vanadium precipitation by hydrolysis is closely related to the properties of vanadiumcontaining solution such as the content of impurities,concentration of vanadium species,temperature and p H value of the solution. Vanadium pentoxide with purity 99. 5% satisfying the application requirements was obtained by the processes of silicon removal from high concentration sodium vanadate solution,vanadium precipitation by hydrolysis and sodium removal. The optimum process parameters for silicon removal from high concentration sodium vanadate solution are shown as follows： the molar ratio of aluminum sulfate to silicon in the solution is 1. 0,the temperature and time for silicon removal is respectively 95 ℃and 60 min,and the p H value of vanadium solution is 10. 0. More than 99. 0% of vanadium recovery rate can be obtained by vanadium precipitation with optimum vanadium concentration of 50 g / L,p H value of 2. 5 and temperature of 90 ℃.
出处
《钢铁钒钛》
CAS
北大核心
2015年第3期16-20,共5页
Iron Steel Vanadium Titanium
关键词
水解沉钒
钒液
高浓度
钒收率
vanadium precipitation by hydrolysis
vanadium solution
high concentration
recovery rate
