(中國核工業(yè)集團有限公司 核工業(yè)北京化工冶金研究院，北京 101149)
摘 要: 采用硫酸焙燒-水浸法強化過程高效提取鈾鉬礦中的鈾鉬，運用單因素試驗考察焙燒過程參數(shù)對鈾鉬浸出率的影響。結(jié)果表明：硫酸焙燒過程推薦參數(shù)為酸礦質(zhì)量比0.5:1、硫酸濃度82%、焙燒溫度270 ℃、焙燒時間120 min。優(yōu)化條件下驗證實驗所得焙燒熟料水浸后鈾鉬浸出率可達92%~93%和81%~84%，較現(xiàn)有低溫直接酸浸過程鈾浸出率(85%~90%)有一定提高，鉬浸出率(45%~50%)有大幅提高。對原礦、焙燒熟料、浸出渣物相進行XRD分析后發(fā)現(xiàn)，鈾鉬礦經(jīng)過硫酸焙燒和水浸后主要組分已由原礦中鋁硅酸鹽和SiO2轉(zhuǎn)變?yōu)榻鲈蠸iO2。
關鍵字: 鈾鉬礦；硫酸焙燒；水浸；浸出率；強化過程
（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
