期刊论文

Ding, D.

中文

稀有金属

0258-7076

2022

46

5

665-672

10.13373/j.cnki.cjrm.XY21010034

国家自然科学基金项目（50774047）资助；

本校为第一且通讯机构

以采自某急倾斜疏干型砂岩铀矿床的强风化强氧化砂岩铀矿石为研究对象,先将其破碎至-10mm,分成5~10,3~5,1~3,0.5~1和0~0.5mm这5个粒级;然后分析各粒级铀矿石的质量和品位;再分析其铀矿物的赋存形态,观测铀矿石和铀矿物的微观形貌和结构;最后开展这类铀矿石的搅拌浸出-堆浸组合试验。结果表明:该铀矿石由砂岩、砾岩和泥岩组成,其结构松散,裂隙发育,破碎至-10 mm后,-0.5 mm粒级的铀矿石占比较高,导致破碎矿石渗透性差,不适合直接堆浸;铀矿物赋存状态较简单,以独立矿物和二连体赋存为主,易解离,占铀矿物总量的80%~85%;铀矿石破碎至-10 mm后,-0.5 mm粒级的铀矿石搅拌浸出3 h,+0.5 mm粒级的铀矿石柱浸...

A kind of steeply inclined dry sandstone uranium ore body was recently found in Northwest China. It was evolved from the original horizontal in situ leachable sandstone uranium deposit under the long geological process, the groundwater in the deposit was drained due to seepage to the deep ground, and the sandstone uranium ore in it became a heavily weathered and oxidized one due to its long-term connection with the atmosphere. In order to develop an efficient process for extracting the uranium from ore, induction coupled plasma-mass spectrometr...