Leaching process of rare earths from weathered crustelution-deposited rare earth ore

来源期刊：中国有色金属学报(英文版)2010年第5期

论文作者：田君 池汝安 尹敬群

文章页码：892 - 896

Key words：weathered crust elution-deposited rare earth ore; leaching; hydrodynamics; kinetics; mass transfer

Abstract: In order to strengthen the leaching procedure, the chemical processes of leaching rare earths (RE) from the weathered crust elution-deposited rare earth ore were investigated frow the viewpoints of kinetics, hydrodynamic and mass transfer. The results show that the leaching hydrodynamics follows the Darcy law. The leaching kinetics can be described by the shrinking core model; the leaching process is controlled by diffusion of porous solid layer; and the mass transfer can be described with Van Deemter equation. This provides a theoretic basis and a scientific approach with high efficiency and optimized extraction conditions in industrial practice.

基金信息：supported by the National Natural Science Foundation of China
supported by the Natural Science Foundation of Jiangxi Province, China