川西可尔因地区业隆沟伟晶岩型稀有金属矿的工艺矿物学研究

以川西可尔因地区业隆沟伟晶岩型稀有金属矿为研究对象,采用化学分析、光学显微镜分析、MLA分析、电子探针分析、单矿物分析等岩矿测试手段,对矿样的结构构造、化学组成、矿物组成,锂、铌、钽载体矿物的嵌布特征,以及主要矿物的化学组成特征进行了研究,最终得出该矿样属低品位锂多金属矿。锂主要赋存形式为锂辉石,锂辉石中Li2O含量为7.21%,锂辉石中锂的配分比为87.35%。铌、钽主要赋存于铌钽铁矿系列矿物中。该矿主要利用元素为锂,伴生的铌、钽、铷均刚达到综合回收指标值,铯、铍未达到伴生综合回收的最低工业品位。

STUDY ON MINERALOGICAL CHATACTERIZATION OF PEGMATITE-TYPE RARE- METAL YELONGGOU DEPOSITS IN KEERYIN AREA OF WESTERN SICHUAN PROVINCE

Focusing on the ores derived from pegmatite-type rare-metal deposits located in the Keeryin Area of Western Sichuan Province, and through diverse rock and mineral analytical methods such as chemical analysis, optical microscopical analysis, MLA mineral automatic analysis, electron probe analysis and monomineralic analysis, the structure, texture, chemical composition, mineral composition, dissemination characteristic of carrier minerals of lithium, niobium and tantalum as well as chemical constituent of major minerals of sampled ores have been detailed studied in this paper, aiming to reveal the occurrence state of valuable elements (e.g., lithium, niobium,tantalum and rubidium) in the sampled ores. The results indicate that the sampled ores pertain to low-grade lithium polymetallic ores. The lithium mostly occurs in the spodumene, which contains 7.21% Li2O and reaches a lithium-partition ratio of 87.35%.Niobium and tantalum dominantly occur in niobium-tantalum-iron-series minerals. The results of this process mineralogical study reveal that the lithium is the main target element of the sampled ores, whereas the niobium, tantalum and rubidium barely achieve the threshold value of comprehensive recycle and the caesium and beryllium have lower industrial grade than the threshold value of comprehensive recovery.