石煤氧化焙烧-酸溶液浸出提钒工艺

Technique of oxidizing roast-acid leaching of vanadium from stone coal

针对某地石煤原料组成特点,为提高石煤中钒的浸出率本试验采用氧化焙烧-酸溶液浸出提钒的工艺,研究了焙烧温度,添加剂氯化钠的用量,焙烧时间,酸浸出液用量及浸出温度时间对钒浸出率的影响。结果表明：,焙烧水浸后渣再用稀酸浸出的方法,钒的浸出率可提高10%左右,钒的浸出率可达到75%~80%。

According to forming characteristic of in order to improve leaching rate of vanadium the experimentation adopt oxidizing roast-acid leaching extraction vanadium. The influence of roasting temperature, percentage of additive sodium chloride, roasting time, percentage of acid leaching temperature leaching time are researched, the results of experimentation indicate that leaching rate of vanadium can be increased 10% by the mineral is roasted in the stove, then immersed by water, the sediment immersed by acid again leaching rate of vanadium is 75%-80%.