摘要
The affecting factors of leaching rate such as reacting temperature, mud particle size and concentration of reagents were determined by studying the leaching kinetics of rare earth from black weathering mud. The apparent activation energy is 9.08 kJ/mol from calculating the experimental data. The results show that the leaching process can be described by the shrinking core model and the leaching rate is controlled by diffusion of reacting reagents and reaction product in the porous solid layer. The leaching kinetics is established as: K =7.50×10 -5 ×exp(-9 080/ RT )/ r 2 0.
The affecting factors of leaching rate such as reacting temperature, mud particle size and concentration of reagents were determined by studying the leaching kinetics of rare earth front black weathering mud. The apparent activation energy is 9.08 kJ/mol from calculating the experimental data. The results show that the leaching process can be described by the shrinking core model and the leaching rate is controlled by diffusion of reacting reagents and reaction product in the porous solid layer. The leaching kinetics is established as: K = 7.50 x 10(-5) x exp( - 9 080/RT) /r(0)(2).
出处
《中国有色金属学会会刊：英文版》
EI
CSCD
2000年第4期531-533,共3页
Transactions of Nonferrous Metals Society of China
基金
Projects ( 5 96740 2 1)and ( 5 980 40 0 4)supportedbytheNationalNaturalScienceFoundationofChinaandproject ( 5 972 5 40 8)suppo
