从某稀有金属尾矿中回收长石的试验研究

Experimental study on recovering feldspar from a rare metal tailing

摘要: 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Al₂O₃17.12%、K₂O₃.27%、Na₂O₈.26、Fe₂O₃0.11%的长石精矿及含SiO₂ 96.07%、Fe₂O₃0.02%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。

Abstract: 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-2and cationic collector dodecylamine,feldspar concentrates containing 17.12%Al₂O₃,3.27%K₂O,8.26%Na₂O,0.11%Fe₂O₃and quartz concentrates containing 96.07%SiO₂,0.02%Fe₂O₃ were obtained from the rare metal tailing.Besides the efficient utilization of the tailing,new collector EZ-2performed well in separating feldspar and quartz,thus its application field was broadened.