湖北竹溪岩屋沟-青岩沟铌矿矿石物质组成及铌的赋存状态研究

Research on Mineral Composition and Niobium Occurrence State of Niobium Ore in Yanwugou-Qingyangou,Zhuxi,Hubei

矿物自动定量分析系统(MLA)结合显微镜下观察,查明了岩屋沟-青岩沟铌矿矿石中Nb_2O_5含量为0.0903%,矿石中主要脉石矿物组成为碱性长石和斜长石,主要含铌矿物为易解石和铌易解石,次为含铌榍石,矿物含量为0.08%、0.02%和0.34%;Nb主要赋存于易解石中,其次为含铌榍石和铌易解石中,配分率分别为49.40%、28.44%和22.16%。Ta主要赋存于易解石中,其次为铌易解石中,配分率为74.48%和25.52%。矿物的连生关系简单,主要与脉石矿物碱性长石连生,但粒度都很细小,粒度分布上属于较难选级别。

Combined with Mineral Liberation Analysis(MLA)and observation under the microscope,the Nb2O5 content in the Yanwugou-Qingyangou niobium ore is 0.0903%.The main gangue minerals in the ore are alkaline feldspar and plagioclase,and the main niobium-bearing minerals are aeschynite and niobium aeschynite,secondary is niobium-containing sphene,and the contents are 0.08%,0.02%and 0.34%respectively.The Nb element is mainly stored in aeschynite,followed by niobium-containing sphene and niobium aeschynite,and the proportions are 49.40%,28.44%and 22.16%,respectively.The Ta element is mainly stored in aeschynite,followed by niobium aeschynite,the distribution ratio is 74.48%and 25.52%.The continuous relationship of minerals is simple,mainly with the gangue mineral alkaline feldspar,but the particle size is very small,and the mineral particle size is a difficult sorting level.