风化壳淋积型稀土矿的土水特性
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA（2021）
Abstract
风化壳淋积型稀土矿的渗透特性直接影响原地浸矿的浸出效率.土水特征曲线是研究矿体渗透特性的重要基础,与许多因素具有关联性.为了研究不同因素对矿体土水特征曲线的影响,采用压力板仪进行土水特性试验,分析干密度、粒径和溶浸对稀土矿体土水特性的影响及其作用机理.结果表明,随着干密度的减小,孔隙率增大,矿体饱和含水量增加.采用同一基质吸力时,随着粒径的增加,矿体含水率逐渐减小,矿体持水能力降低.在相同体积含水率情况下,基质吸力与粒径大小成反比.采用同一基质吸力时,溶浸后矿体含水量比溶浸前矿体含水量降低,说明溶浸使得矿体持水能力减小.
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Key words
weathered crust elution-deposited rare earth ore, dry density, particle size, solution leaching, soil-water characteristic curve
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