从某稀有金属尾矿中回收长石的试验研究

摘要

In this paper ,the mineral composition ,size distribution and dissemination relation of a rare metal tailing were studied first .Then on the basis of the tailing′s properties ,condition tests including process flow‐sheet ,grinding fineness and collector selection were carried out to evaluate the effects on the separation of feldspar and quartz .At last ,under acidic conditions ,by using the self‐made anionic collector EZ‐2 and cationic collector dodecylamine ,feldspar concentrates containing 17 .12% Al2 O3 ,3 .27% K2 O ,8 .26% Na2 O , 0 .11% Fe2 O3 and quartz concentrates containing 96 .07% SiO2 ,0 .02% Fe2 O3 were obtained from the rare metal tailing .Besides the efficient utilization of the tailing ,new collector EZ‐2 performed well in separating feldspar and quartz ,thus its application field was broadened .%本文分析了某稀有金属尾矿的矿物组成、粒度组成以及矿物之间的相互嵌布关系。根据尾矿性质，考察了工艺流程，磨矿细度，阴阳离子混合捕收剂的筛选、配比以及用量等条件对长石石英分选效果的影响。最终，采用自行研制的阴离子捕收剂 EZ‐2和十二胺，应用硫酸法分离长石和石英，得到含Al2 O317．12％、K2 O3．27％、Na2 O8．26、Fe2 O30．11％的长石精矿及含 SiO296．07％、Fe2 O30．02％的石英砂，实现了尾矿的高效利用。同时，捕收剂EZ‐2也展现了良好的捕收性能，拓宽了其应用领域。