地浸铀矿沉淀浆体真空抽滤脱水制备黄饼试验研究  

Preparation of Yellowcake by Vacuum Filtration Dewatering of Precipitation Slurry from In-Situ Leaching Uranium Mine

作　　者：王亚安 杜志明[1] 程威[1] 原渊[1] 闻振乾 李光辉 刘国宏[1] 曹鸣谦 吕学钦 WANG Yaan;DU Zhiming;CHENG Wei;YUAN Yuan;WEN Zhenqian;LI Guanghui;LIU Guohong;CAO Mingqian;LYU Xueqin(Beijing Research Institute of Chemical Engineering and Metallurgy,CNNC,Beijing 101149,China;China National Uranium Co.,Ltd.,Beijing 100010,China;CNNC Inner Mongolia Mineral Co.,Ltd.,Hohhot 014010,China)

机构地区：[1]核工业北京化工冶金研究院,北京101149 [2]中核铀业有限责任公司,北京100010 [3]中核内蒙古矿业有限公司,内蒙古呼和浩特014010

出　　处：《湿法冶金》2025年第1期10-16,共7页Hydrometallurgy of China

基　　金：中核集团青年英才项目(地浸采铀新型地表固液分离系统研发及应用)。

摘　　要：针对地浸采铀水冶流程中,利用板框压滤机处理沉淀浆体制备黄饼工艺自动化程度较低的问题,采用一种水平带式真空过滤机在地浸铀矿山首次进行重铀酸钠沉淀浆体抽滤脱水试验研究,重点考察了不同操作条件对黄饼产品含水量的影响。结果表明:该系统在抽滤真空度-0.06~-0.08 MPa、滤布精度38μm、浆体停留时间640 s、进料流量353~589 kg/h、反洗及密封循环水量10 m^(3)/h条件下,从布料—抽滤—卸料—滤布反洗全过程可自动循环、连续稳定运行,产品含水量能达到一级品标准,满足年产500 t左右金属铀的矿山对沉淀浆体脱水能力要求,初步证实了采用带式真空过滤机对沉淀浆体进行脱水的技术可行性。该抽滤脱水工艺能减轻作业人员劳动强度,降低辐射危害,提高整个水冶流程自动化程度,具有一定推广应用价值。In order to solve the issue of low automation in the hydrometallurgical process in in-situ leaching of uranium,especially in the preparation of yellowcake from precipitation slurry using plate and frame filter presses,a horizontal belt vacuum filter was selected for the first time in an in-situ leaching of uranium mine to conduct a filtration dewatering experiment on sodium diuranate precipitation slurry.The influence of different operating conditions on moisture content of yellow cake products was investigated.The results show that under the conditions of a filtration vacuum of-0.06~-0.08 MPa,a filter cloth precision of 38μm,a slurry residence time of 640 s,a feed flow rate of 353~589 kg/h,and a backwash and sealing circulation water flowrate of 10 m^(3)/h,the entire process from cloth feeding to filtration,dewatering,cake discharge,and cloth backwashing can be automatically cycled and run continuously and stably.The product moisture content meets the first-grade standard,satisfying the dewatering capacity requirements for a mine producing about 500 t of metallic uranium per year.The technical feasibility of using belt vacuum filter to dehydrate the precipitated slurry has been preliminatively confirmed.The technical feasibility of using belt vacuum filter for dewatering the precipitation slurry has been preliminatively confirmed.The filtration dewatering process can reduce the labor intensity of operators,reduce the radiation hazard,and improve the automation of the entire hydrometallurgy process,it has value for promotion and application.

关 键 词：地浸采铀 带式真空过滤机 重铀酸钠 沉淀浆体 抽滤脱水 黄饼 

分 类 号：TL212[核科学技术—核燃料循环与材料]