###
有色金属(冶炼部分):2021,(10):58-65
←前一篇   |   后一篇→
本文二维码信息
码上扫一扫!
内蒙古巴彦乌拉铀矿含矿层堵塞的水文地球化学机理
陈鑫睿.1, 刘金辉.1, 邢拥国2, 阳奕汉3, 胡鹏飞3, 王如意3, 梁大业4, 陈万利2
(1.东华理工大学;2.中核矿业科技有限公司;3.中核内蒙古矿业有限公司;4.湖南省核工业地质调查院)
Hydrogeochemical Mechanism of Ore Bearing Bed Plugging in Bayanwula Uranium Deposit, Inner Mongolia
摘要
图/表
参考文献
相似文献
本文已被:浏览 58次   下载 52
投稿时间:2021-06-16    修订日期:2021-06-18
中文摘要: 铀浸出是溶浸液与铀矿物之间发生一系列水文地球化学作用来实现的,巴彦乌拉铀矿酸法地浸开采过程中出现了含矿层堵塞问题。基于含矿层矿物特征,根据浸出液化学成分,采用地球化学模式程序PHREEQCI对浸出液-矿物平衡进行模拟,计算了矿物的饱和指数与反应条件指数,确定了矿物溶解沉淀状态,揭示了含矿层堵塞水文地球化学机理。结果表明,含矿层堵塞水文地球化学原因是溶浸液中Ca2+、SO42-与Fe3+处于过饱和状态,产生了石膏、针铁矿、赤铁矿沉淀,其饱和指数分别为0.06~0.20、0.01~-0.83、0.94~2.58;石膏的反应条件指数RCICa=0.34~0.42,RCIS=1.17~1.35,Ca2+浓度是其溶解—沉淀的主要影响因素,赤铁矿、针铁矿的RCIpH=-3.47~-3.27、RCIEh=-599.44~-474.72 mV、RCIFe=0.96~1.37,均处于沉淀状态,石膏、铁矿物沉淀是溶浸液与含矿层中的矿物作用后其离子活度积超过了其溶液积常数的结果。
Abstract:Uranium leaching is realized by a series of hydrogeochemical interactions between leaching solution and uranium minerals. In Bayanwula uranium mine, blockage of ore-bearing strata occurred in acid in-situ leaching. Based on mineral characteristics of ore-bearing bed and chemical components of leachate, leachate - mineral balance was simulated by model of geochemical process PHREEQCI, saturation index of mineral and reaction condition index (RCI) were calculated, mineral dissolution precipitation stat was determined, and hydrogeochemical mechanism of blockage of ore-bearing bed was revealed. The results show that hydrogeochemical reason for blockage of ore-bearing strata is that Ca2+, SO42- and Fe3+ in leaching solution are in supersaturated state, resulting in precipitation of gypsum, goethite and hematite, with saturation index of 0.06—0.20, 0.01—0.83 and 0.94—2.58, respectively. RCICa of gypsum is 0.34—0.42, and RCIS is 1.17—1.35. Ca2+ concentration is main factor affecting solution-precipitation of gypsum. RCIpH (-3.47—-3.27), RCIEh (-599.44—-474.72 mV) and RCIFe (0.96—1.37) of hematite and goethite are all in precipitated state. Precipitation of gypsum and iron minerals is the result that ionic activity product of leaching solution exceeds its solution product constant after interaction between leaching solution and minerals in ore bearing layer.
文章编号:     中图分类号:    文献标志码:
基金项目:国家自然科学基金核技术创新联合基金(U1967209)
引用文本:
陈鑫睿.,刘金辉.,邢拥国,阳奕汉,胡鹏飞,王如意,梁大业,陈万利.内蒙古巴彦乌拉铀矿含矿层堵塞的水文地球化学机理[J].有色金属(冶炼部分),2021(10):58-65.
CHEN Xin-rui,LIU Jin-hui,XING Yong-guo,YANG Yi-han,HU Peng-fei,WANG Ru-yi,LIANG Da-ye,CHEN Wan-li.Hydrogeochemical Mechanism of Ore Bearing Bed Plugging in Bayanwula Uranium Deposit, Inner Mongolia[J].Nonferrous Metals (Extractive Metallurgy),2021(10):58-65.

我们一直在努力打
造,精品期刊,传
播学术成果

全国咨询服务热线
86-10-63299752/63299758

杂志信息

相关下载

期刊简介

联系我们

电话:010-63299752/63299758

传真:010-63299744

QQ:XXXXXXX

Email:ysyl@bgrimm.com

邮编:100160

地址:北京市南四环西路188号总部基地18区23号楼

关注微信公众号