辉钼精矿氧压水浸工艺及动力学研究  

Study on Process and Kinetics of Oxygen-Pressure Water Leaching of Molybdenite Concentrate

作　　者：彭亿龙 秦庆伟[1] 仝一喆[2] 王恒辉[1,2] PENG Yi-long;QIN Qing-wei;TONG Yi-zhe;WANG Heng-hui(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology,Wuhan 430081,China;CINF Engineering Co.,Ltd.,Changsha 410001,China)

机构地区：[1]武汉科技大学钢铁冶金及资源利用教育部重点实验室,湖北武汉430081 [2]长沙有色冶金设计研究院有限公司,湖南长沙410001

出　　处：《稀有金属与硬质合金》2024年第3期1-6,59,共7页Rare Metals and Cemented Carbides

基　　金：湖北省揭榜制科技项目(2020BED026);广西科技计划项目(桂科AA22068076)

摘　　要：采用正交试验确定辉钼精矿氧压水浸的最佳工艺条件,并在最佳工艺条件下进行氧压水浸过程MoS_(2)氧化分解反应的动力学研究。结果表明:最佳工艺条件为矿石粒度D_(90)=46μm、氧压1.1 MPa、温度230℃、液固比7∶1和反应时间1 h;在此条件下,钼转化率最高可达99.77%,铜浸出率为97.56%,铁浸出率为88.71%。在170~230℃浸出温度范围内(其他工艺条件均为上述最佳值),辉钼精矿中MoS_(2)氧化分解反应遵循未反应核收缩模型,该过程主要受化学反应控制,表观活化能为45.71 kJ/mol。Orthogonal experiments were used to determine the optimal process conditions for oxygen-pressure water leaching of molybdenite concentrate,and the kinetics study of MoS_(2) oxidative decomposition reaction during oxygen-pressure water leaching was carried out under the optimal process conditions.The results show that under the optimal conditions of ore particle size D_(90)=46 μm,oxygen pressure of 1.1 MPa,temperature of 230 ℃,liquid-solid ratio of 7∶1,and reaction time of 1 h,the highest molybdenum conversion ratio can reach 99.77%,with the copper leaching ratio of 97.56%,and the iron leaching ratio of 88.71%.Within the leaching temperature range of 170~230 ℃(other process conditions are set at the above-mentioned optimal values),the oxidative decomposition reaction of MoS_(2) in molybdenite concentrate follows the unreacted nucleus shrinking model and is primarily controlled by chemical reaction with an apparent activation energy of 45.71 kJ/mol.

关 键 词：辉钼精矿 氧压水浸 MoS_(2)氧化分解 正交试验 动力学 

分 类 号：TF841.2[冶金工程—有色金属冶金]