提高云南某石煤钒矿酸法提钒浸出率的研究

Study on improving the acid leaching rate of vanadium from stone coal in Yunnan

云南某石煤钒矿中的钒主要以类质同象形式赋存于硅酸盐矿物中,直接硫酸法处理浸出率仅为60.9%.试验表明,使用助浸剂可强化酸浸过程中对矿石结构的破坏,提高钒的浸出率.在硫酸用量为250kg/t、液固比1∶1、助浸剂A为25kg/t、助浸剂B为3kg/t、浸出温度90℃、浸出时间12h的条件下,钒的浸出率可达81.91%.与直接硫酸法相比,钒的浸出率提高20%以上.

The vanadium of stone coal in Yunnan province mainly exists in the silicate minerals as isomorphism,and the leaching rate is 60.9~ via acid leaching method directly because of the stable structure of minerals. The results indicate that aid-leaching reagents can strengthen the destruction of ore structure and improve the leaching rate. The leaching rate can be achieved to 81.91% under these conditions, the particle size -0. 18 mm with 90%,the sulfuric acid amount 250 kg/t, liquid to solid ratio 1 ： 1, aid-leaching reagent A 25 kg/t and aid-leaching reagent B 3 kg/t, reaction temperattire at 90℃,reaction time 12 h. And it was improved more than 20% compared with acid leaching method directly.