摘要
采用硫酸焙烧-水浸法强化过程高效提取铀钼矿中的铀钼,运用单因素试验考察焙烧过程参数对铀钼浸出率的影响。结果表明:硫酸焙烧过程推荐参数为酸矿质量比0.5:1、硫酸浓度82%、焙烧温度270℃、焙烧时间120 min。优化条件下验证实验所得焙烧熟料水浸后铀钼浸出率可达92%～93%和81%～84%,较现有低温直接酸浸过程铀浸出率(85%～90%)有一定提高,钼浸出率(45%～50%)有大幅提高。对原矿、焙烧熟料、浸出渣物相进行XRD分析后发现,铀钼矿经过硫酸焙烧和水浸后主要组分已由原矿中铝硅酸盐和SiO_2转变为浸出渣中SiO_2。
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.
作者
刘康
向秋林
师留印
黄永
LIU Kang;XIANG Qiu-lin;SHI Liu-yin;HUANG Yong(Beijing Research Institute of Chemical Engineering and Metallurgy,China National Nuclear Corporation, Beijing 100083, China)
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2019年第4期858-863,共6页
The Chinese Journal of Nonferrous Metals
基金
中国核工业集团有限公司核心能力提升项目(中核科发(2014)-111)~~
关键词
铀钼矿
硫酸焙烧
水浸
浸出率
强化过程
U-Mo ore
sulfuric acid roasting
water leaching
leaching rate
intensification process
