(中国核工业集团有限公司 核工业北京化工冶金研究院，北京 101149)
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SiO2转变为浸出渣中SiO2。
关键字: 铀钼矿；硫酸焙烧；水浸；浸出率；强化过程
（Beijing Research Institute of Chemical Engineering and Metallurgy, China National Nuclear Corporation, Beijing 100083, China）
Abstract: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.
Key words: U-Mo ore; sulfuric acid roasting; water leaching; leaching rate; intensification process
