相山铀矿田邹家山矿床矿石矿物组成研究

Study on the ore mineral composition of Zoujiashan Deposit in Xiangshan Uranium Mine

相山铀矿田邹家山矿床深部铀矿石中钛含量升高,影响常规水冶的铀浸出率和产品质量。为从矿物学角度了解其原因,同时采用微生物浸出工艺提高铀浸出效率,通过电子探针和化学分析方法对该区铀矿石进行矿物组成研究。研究结果初步表明,该矿床矿石中铀矿物种类比较单一,主要以沥青铀矿和钛铀矿为主,其次为铀石等;铀矿物主要呈细脉状、浸染状、不规则团状、颗粒状、斑点状分布,多以独立矿物形式存在,部分铀矿物生长于黄铁矿;铀含量与P2O5、TiO2和CaO等含量呈正相关;该铀矿石中黄铁矿含量较高,部分铀矿物赋存于石英颗粒裂隙及裂缝中,有利于微生物浸出。磷灰石含量高是酸耗量高的原因,黏土矿物含量较高,可影响矿堆渗透能力。上述研究结果可为改进微生物浸铀工艺、提高微生物浸铀效率提供矿物学依据。

The uranium recovery and products quality in uranium hydrometallurgy was seriously influenced with the increasing of mining depth and titanium content in Zoujiashan deposit of Xiangshan Uranium Ore. To solve the problems from minerology and provide basis for bioleaching of this ore, minerology and chemical compositions were investigated both by electron probe mieroanalysis and chemical analysis. The results showed that species of uranium mineral was simple with mainly of pitchblende and brannerite, and the existence form of uranium mineral was mainly as fine strings, disseminated, irregular, particles and spotted formation with some of their adjacent to phosphorite and pyrite, which was of high content in this ores and benefit to bioleaching. Uranium content was positive correlation with content of P2O5, TiO2 and CaO in the mineral, which was the main reason of acid consuming while in ura nium extraction. And the high content of clay in the mineral could be the reason of bad permeability. All the results above could be the basis for improving the techniques of uranium bioleaching and uranium recovery.