铀矿冶2026，Vol.45Issue(2)：41-48,8.DOI:10.13426/j.cnki.yky.2025.08.10
纳米比亚某低品位铀矿石拌酸制粒柱浸试验研究
Column Leaching Experimental Study on Acid-agglomerated of a Low-grade Uranium Ore in Namibia
刘洋 1张杰伟 1唐文生 1胡南 2张辉 2丁德馨2
作者信息
- 1. 中广核铀业发展有限公司,北京 100029
- 2. 南华大学铀矿冶生物技术国防重点学科实验室,湖南衡阳 421001
- 折叠
摘要
Abstract
This study investigated parameter optimization for heap leaching of a low-grade uranium ore from Namibia deposit through systematic column leaching experiments.Mineralogical composition analysis shows that the uranium ore contains a high proportion of high acid consuming gangue miner-als,with tetravalent uranium accounting for 68％.The main uranium minerals are easily leached uraninite and coffinite.The uranium is enriched of in the fine-grainedportion.After crushing to-8 mm,the mass fraction of fine-grained uranium at-0.425 mm reaches 15.09％,and its uranium grade is as high as 0.032％,which leads to the deterioration of direct heap leaching permeability and requires acid-agglomeration pretreatment.Column leaching experiments established the optimal pa-rameter combination:irrigation rate of 20 L/(h·m2),heap height of 9 m,aciddosage for pre-agglom-eration of 20 kg/t,binder dosage of 125 g/t,and initial leachate acidity of 100 g/L H2SO4.Under op-timized conditions,the irrigation duration is shortened to 55 d,and the uranium extraction rate is in-creased to 80％.This study has demonstrative significance for the development of similar low-grade,high acid consumption,high fine-grained,and high tetravalent uranium resources.关键词
低品位铀矿/拌酸制粒/柱浸/堆浸Key words
low-grade uranium ore/acid mixing and granulation/column leaching/heap leaching分类
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刘洋,张杰伟,唐文生,胡南,张辉,丁德馨..纳米比亚某低品位铀矿石拌酸制粒柱浸试验研究[J].铀矿冶,2026,45(2):41-48,8.
