江西富家坞矿床铜钼矿石中铼元素的赋存状态及其回收影响因素分析

摘要

查明铼在矿石矿物中的赋存状态是对铼进行综合回收的前提.以往研究缺乏针对德兴富家坞矿床铜钼矿石中铼的赋存状态研究.对此,本文通过化学分析、岩矿鉴定、电子探针分析、筛析试验和平衡配分等方法和手段,对富家坞矿床中蚀变花岗闪长斑岩型和千枚岩型铜钼矿石进行了系统的工艺矿物学研究,查明了矿石中铼的赋存状态及影响其回收利用的因素.研究未发现独立铼矿物,铼分散分布于辉钼矿、黄铜矿、黄铁矿、方铅矿和锆石等矿物中,含量范围为0.001%~0.267%.辉钼矿为铼的富集和回收的目标矿物,其铼含量高达684×10-6,且铼在不同粒级中与钼的品位变化具趋同性.对两类铜钼矿石的铼进行综合回收时需考虑辉钼矿含量及脉石矿物种类的差异性,分类利用矿石;同时,对矿石进行破碎细磨时,应避免矿石过粉碎问题,以提高+0.023 mm粒段中铼的综合回收率.%Understanding the occurrence of Re in ore minerals is the prerequisite for comprehensive recovery of rhenium.The study on the occurrence of Re in copper-molybdenum ores of Fujiawu deposit is lacking.Chemical analysis,optical microscopic identification,electron probe analysis,sieve analysis and balance classification were used to systematically process a mineralogy study on the porphyry type copper-molybdenum ore and phyllite type copper-molybdenum ore from the Fujiawu copper molybdenum mine,in order to understand the present state of Re in ores and the factors affecting the recovery and utilization of Re in ores.No independent rhenium minerals have been found,and Re is dispersed in minerals such as molybdenite chalcopyrite,pyrite,galena,and zircon.The content of Re ranges from 0.001% to 0.267%.Molybdenite is the target mineral for enrichment and recovery of Re with Re content up to 684 ×10 -6 .Moreover,the grade change of Re and Mo is similar in different particle sizes. For the comprehensive recovery of Re from two types of copper-molybdenum ores,the differences in molybdenite content and types of gangue minerals should be taken into consideration,and the ore to be used should be classified.Meanwhile,when the ore is crushed and ground,it should not be crushed excessively,in order to improve the comprehensive recovery of Re at +0.023 mm.