某难选铷矿石选矿预富集试验

我国西部某大型铷矿床资源储量约10万t，矿石中的铷呈分散状态赋存在钾长石及铁锂云母中，主要脉石矿物钠长石和石英不含铷。根据铁锂云母有弱磁性、钾长石的可浮性与石英相差较大的特点，以强磁选富集矿石中的含铷矿物铁锂云母、浮选富集矿石中的含铷矿物钾长石的磁浮联合流程进行了铷预富集试验。结果表明，Rb2O含量为0.13%的矿石在磨矿细度为-0.074 mm占65%的情况下，以PL为石英等硅酸盐矿物的强抑制剂、EZ+十二胺为长石类矿物的捕收剂，经1次强磁选，1粗1扫2精、中矿合并再选的浮选流程处理，获得了Rb2O品位为0.39%、回收率为69.91%的铷精矿。

Pre-concentration Test of a Refractory Rubidium Ore

There are 100 thousand ton deposits resources distributed in our country in Western China. Rubidium mainly occurred in potassium feldspar and zinnwaldite in a decentralized state. The main gangue minerals are sodium feldspar and quartz. According to zinnwaldite has low intensity magnetism,and there are large floatability difference between feldspar and quartz,preconcentration experiment by combined flowsheet of magnetic separation and flotation,enrichment of zinnwaldite con-taining rubidium by high intensity magnetic separation and enrichment of potassium feldspar containing rubidium mineral by flotation. The results showed that raw ore with Rb2 O grade of 0. 13% ground to 65% passing 0. 074 mm,using PL as strong depressor of quartz and other silicate minerals,EZ and laurylamine as combined collector of feldspar minerals,rubidium con-centrate with Rb2 O grade of 0. 39% and recovery of 69. 91% was obtained through one high intensity magnetic separation,one roughing,two cleaning,one scavenging flotation process.