白云母与石英的浮选分离行为

预分选-湿法提取是石煤提钒工艺最具潜力的发展方向。石煤中的钒主要存在于白云母中,预分选主要是采用浮选方法分离石煤中含钒白云母与石英等脉石矿物。为此,分别以十二胺、十八胺、LU-1、LU-3为阳离子捕收剂考察其对白云母、石英的浮选效果。结果表明:捕收剂浓度对白云母浮选有较大影响,但对石英无明显影响;在酸性条件下,十二胺、十八胺和LU-1对白云母有良好捕收作用,其中十二胺的捕收效果最好;在弱碱性条件下,LU-3对石英的捕收效果良好。石煤提钒预分选中可在酸性条件以十二胺为捕收剂浮选白云母或碱性条件下以LU-3为捕收剂浮选石英,分离白云母和石英,以提高钒入浸品位,并减少进入浸出工序物料量,从而降低浸出剂消耗。这有利于降低成本,提高钒回收率。

Flotation Separation Behavior of Muscovite and Quartz

Pre-separation-wet extraction is the most potential development direction of vanadium extraction from stone coal. Vanadium in stone coal mainly exists in muscovite. Pre-separation mainly uses flotation method to separate vein minerals such as vanadium-bearing muscovite and quartz in stone coal. Therefore， dodecylamine， octadecylamine， LU-1 and LU-3 were used as cationic collectors to investigate their flotation effects on muscovite and quartz. The results show that the concentration of collector has a great influence on the flotation of muscovite， but has no obvious influence on quartz. Under acidic conditions， dodecylamine， octadecylamine and LU-1 have good collecting effect on muscovite， among which dodecylamine has the best collecting effect. Under weak alkaline condition， LU-3 has a good effect on quartz collection. In the pre-separation of vanadium extraction from stone coal， dodecylamine can be used as collector to flotation muscovite or LU-3 can be used as collector to flotation quartz under acidic or alkaline conditions. The separation of muscovite and quartz can improve the leaching grade of vanadium and reduce the amount of material entering leaching process， thus reducing the consumption of leaching agent. The process is conducive to reducing costs and improving vanadium recovery.