含钒石煤焙烧浸出生产偏钒酸铵工艺研究

Study on Production of Ammonium Metavanadate by Roasting-leaching of Vanadium Bearing Stone Coal

钒是一种应用广泛的金属,随着高精尖技术的不断发展,一些高端制造业对钒产品的纯度要求也比以往更高,所以对高纯度五氧化二钒制备技术的研究变得越来越重要。本文以石煤焙烧浸出后的原液为原料,研究偏钒酸铵结晶过程,考察了加铵系数、反应温度、反应pH、搅拌速度等因素对沉钒率的影响。实验结果表明,最佳的生产偏钒酸铵条件:加铵系数为1.3,反应温度为45℃,反应pH为9.5,搅拌速度为400 r/min。

Vanadium is a widely used metal.With the continuous development of sophisticated technology,some high-end manufacturing industry has higher requirements on the purity of vanadium products than before,so the research on the preparation technology of high purity vanadium pentaoxide is becoming more and more important.In this paper,by studying the crystallization process of ammonium metavanadate,the influence of factors such as ammonium adding coefficient,reaction temperature,reaction pH and stirring intensity on vanadium precipitation rate was investigated.The results show that the optimum conditions for the production of ammonium metadvanadate are as follows:ammonium adding coefficient is 1.3,reaction temperature is 45℃,reaction pH is 9.5,stirring speed is 400 r/min.