U and Mo extraction from U-Mo ore during sulfuric acid roasting process

被引：0
作者：
Liu K. [1 ]
Xiang Q.-L. [1 ]
Shi L.-Y. [1 ]
Huang Y. [1 ]
机构：
[1] Beijing Research Institute of Chemical Engineering and Metallurgy, China National Nuclear Corporation, Beijing
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2019年 / 29卷 / 04期
关键词：
Intensification process; Leaching rate; Sulfuric acid roasting; U-Mo ore; Water leaching;
D O I：
10.19476/j.ysxb.1004.0609.2019.04.23
中图分类号：
学科分类号：
摘要：
The intensification process consisting of sulfuric acid roasting - water leaching was conducted to extract U, Mo from U-Mo ore, and the single factor experiments were performed to investigate the effect of roasting process parameters on U and Mo leaching rates. The results show U and Mo leaching rates can reach 92%-93% and 81%-84%, respectively, at recommended processing parameters: mass ratio of H2SO4 to ore 0.5:1, sulfuric acid concentration of 82%, roasting temperature of 270 ℃ and roasting time of 120 min, which have minor increase of U and substantial increase of Mo compared with present U and Mo leaching rates 85%-90% and 45%-50% from direct acid leaching process under low temperature, respectively. The XRD analysis results of original ore, clinker and leached residue show that the main phases of U-Mo ore endured sulfuric acid roasting and water leaching change from aluminosilicate and SiO2 in raw ore to SiO2 in leached residue. © 2019, Science Press. All right reserved.
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页码：858 / 863
页数：5
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