Leaching hydrodynamics of weathered elution-deposited rare earth ore
来源期刊:中国有色金属学报(英文版)2001年第3期
论文作者:田君 池汝安 朱国才 徐盛明 邱欣 张志庚
文章页码:434 - 437
Key words:hydrodynamics; rare earth ore; leach; porosity; permeability
Abstract: Both porosity (φ) and permeability ( k ) of the weathered elutiondeposited rare earth ores are basic hydrodynamic parameters for RE leaching. The relationship between k and φ of two typical rare earth ores of South China in the packed bed was investigated by measuring the flow ( Q ) under various leaching pressure difference (Δp ). The experimental results show that the relationship between k and φ is unique, moreover the relationship between Q andΔp is in accord with the Darcy's law. The effects of the type of ores, the leaching reagents and its concentration, the granule ore size on the leaching permeability have also been investigated. It is demonstrated that kH (for heavy RE ore, kH=35.98?mm2)>kM-H(for middle-heavy RE ore,kM-H=28.50 mm2), whereas k(NH4NO3)>k(NH4Cl)>k[(NH4)2SO4], and the k value increases with increasing leaching reagents concentration and granule ore size(k0.60~0.75 mm=99.96 mm2, k0.125~0.60 mm=11.83 mm2, k0.074~0.125 mm=0.84 mm2).
基金信息:the National Outsanding Younger Scholar Foundation of China