有色金属(冶炼部分)

采用造球—氧化焙烧—碱浸的方法从石煤中浸出钒,考察了焙烧温度、焙烧时间、浸出温度、浸出剂浓度、浸出时间、浸出液固比对浸出率的影响,获得了88.38%的高浸出率。研究表明,焙烧温度、浸出温度、浸出剂浓度、浸出时间是浸出率的重要影响因素。适宜的工艺条件是:焙烧温度850℃、焙烧时间3 h、浸出温度90℃、浸出剂浓度2 mol/L、浸出时间2 h、浸出液固比3。

This study used the technique of pelletization-oxidation roasting-alkali leaching to extract vanadium from stone coal,the effects of roasting temperature,roasting time,leaching temperature,leaching agent concentration,leaching time,leaching L/S were investigated.With this technique,it has got a result of leaching rate was as high as 88.38%.The results indicate that roasting temperature,leaching temperature,leaching agent concentration,leaching time were the main factors which affect the leaching rate.The best technique condition is: roasting temperature is 850℃,roasting time is 3h,leaching temperature is 90℃,leaching agent concentration is 2 mol/L,leaching time is 2h,and leaching L/S is 3.