新疆洪海沟矿床酸法地浸采铀试验  

Acid In-situ Uranium Leaching Trial at Honghaigou Deposit,Xinjiang

作　　者：张青林 黄群英 贾志远 陈立 范龙 黎广荣[2] 周义朋[2] ZHANG Qinglin;HUANG Qunying;JIA Zhiyuan;CHEN Li;FAN Long;LI Guangrong;ZHOU Yipeng(Xinjiang Tianshan Uranium Co.,Ltd.,CNNC,Yining 835000,Xinjiang,China;State Key Laboratory of Nuclear Resources and Environment,East China University of Technology,Nanchang 330013,China)

机构地区：[1]新疆中核天山铀业有限公司,新疆伊宁835000 [2]东华理工大学核资源与环境国家重点实验室,南昌330013

出　　处：《有色金属（冶炼部分）》2024年第8期105-112,共8页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(42072285)。

摘　　要：洪海沟矿床是我国新疆千吨铀矿大基地的重要后备资源。为确立该矿床开发的适宜浸出工艺,在前期实验室研究基础上,开展了“四注一抽”规模的酸法地浸采铀试验。结果表明:该矿床微酸和低酸浸出均未达到预期浸出效果,采用3.0~4.0 g/L酸度酸化、7.0~7.5 g/L酸度浸出是适宜工艺;300 mg/L剂量的H_(2)O_(2)能加速铀的浸出,但受限于溶出的Fe含量较低,氧化剂效能受限;尽管矿床碳酸盐含量不高,但浸出液Ca^(2+)、SO_(4)^(2-)持续增加易形成石膏沉淀导致抽注流量下降,需要在后续生产中予以关注。Honghaigou deposit is an important reserve resource for the base of kiloton uranium mine in Xinjiang,China.In order to establish a suitable leaching process for the development of the deposit,a“four-injection-one-extraction”scale acid in-situ leaching of uranium test was conducted based on previous laboratory research.The results show that both slightly acidic and low acidic leaching of the deposit are not feasible,and an acidification of 3.0—4.0 g L and leaching of 7.0—7.5 g L are suitable processes.The 300 mg L dose of H_(2)O_(2) can accelerate the leaching of uranium,but the low content of dissolved Fe limits the efficiency of the oxidant.Despite the low carbonate content of the deposit,the continuous increase of Ca^(2+)and SO_(4)^(2-)in the solution is easy to form gypsum deposition and lead to decrease of extraction flow,which needs to be paid attention to in subsequent production.

关 键 词：砂岩铀矿 地浸采铀 酸法浸出 条件试验 

分 类 号：TL212.12[核科学技术—核燃料循环与材料]