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

摘要:

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250 kg/t、液固比1∶1、助浸剂 A 为25 kg/t 、助浸剂 B 为3 kg/t、浸出温度90℃、浸出时间12 h 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.

Abstract:

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 temperature at 90℃, reaction time 12 h.And it was improved more than 20， compared with acid leaching method directly.