Leaching kinetics of molybdenum from Ni-Mo ore in sulfuric acid solution with sodium peroxodisulfate as oxidant
来源期刊：中南大学学报(英文版)2015年第3期
论文作者：LIU Zhi-xiong(刘志雄) YIN Zhou-lan(尹周澜) CHEN Yi-guang(陈义光) XIONG Li-zhi(熊利芝)
文章页码：874 - 879
Key words：Ni-Mo ore; leaching kinetics; molybdenum; oxidant; sodium peroxodisulfate
Abstract: The leaching kinetics of molybdenum from Ni-Mo ore in sulfuric acid solution with sodium peroxodisulfate was studied. The effects including leaching temperature, reaction time, particle size, stirring speed, and concentrations of sulfuric acid and sodium peroxodisulfate were investigated. The leaching process of molybdenum from Ni-Mo ore is controlled by the chemical reaction through the solid layer across the unreacted shrinking core. The apparent activation energy of the leaching of molybdenum is calculated to be 41.0 kJ/mol and the leaching kinetics equation of molybdenum from Ni-Mo ore is expressed as 1-(1-a)1/3=3405.7exp[-41030.0/(RT)]t.
LIU Zhi-xiong(刘志雄)1, YIN Zhou-lan(尹周澜)2, CHEN Yi-guang(陈义光)3, XIONG Li-zhi(熊利芝)3
(1. College of Physics and Mechanical & Electrical Engineering, Jishou University, Jishou 416000, China;
2. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China;
3. College of Biology and Environmental Sciences, Jishou University, Jishou 416000, China)
Abstract:The leaching kinetics of molybdenum from Ni-Mo ore in sulfuric acid solution with sodium peroxodisulfate was studied. The effects including leaching temperature, reaction time, particle size, stirring speed, and concentrations of sulfuric acid and sodium peroxodisulfate were investigated. The leaching process of molybdenum from Ni-Mo ore is controlled by the chemical reaction through the solid layer across the unreacted shrinking core. The apparent activation energy of the leaching of molybdenum is calculated to be 41.0 kJ/mol and the leaching kinetics equation of molybdenum from Ni-Mo ore is expressed as 1-(1-a)1/3=3405.7exp[-41030.0/(RT)]t.
Key words:Ni-Mo ore; leaching kinetics; molybdenum; oxidant; sodium peroxodisulfate
