原状和重塑离子型稀土矿体的孔径分布特征

为获得离子型稀土矿原状矿体和重塑矿体的孔径分布特性,利用张力计对赣南典型的离子型 稀土矿体进行现场和室内的土-水特征曲线测试试验,依据拟合得到的土-水特征曲线计算原状矿体 和重塑矿体的孔径分布.研究发现院原状矿体的比表面积为1.313 m2/g,累积孔隙总体积0.224 4 m3/g, 重塑矿体的比表面积为4.205 m2/g,累积孔隙总体积0.236 5 m3/g.重塑过程改变原矿的孔径分布,使 矿体的比表面积增加3.2 倍,但有效孔隙总体积变化不明显,使得重塑矿体浸润效果更好,而渗透性 有所降低. 

Pore size distribution characteristics of undisturbed and re-molded soil of ion-adsorption rare earth ore

To obtain pore size distribution characteristics of undisturbed and remolded soil of ion-adsorption rare-earth ore, soil-water characteristic curve tests in field and lab were performed by applying tensiometer on a typical ion-adsorption rare-earth ore in Southern Jiangxi. The pore size distributions of undisturbed and re-moulded ore body were calculated on the basis of the fitting models of soil-water characteristic curve. The re-sults show that the specific surface area of undisturbed ore body is 1.313 m2/g, cumulative total pore volume of undisturbed ore body is 0.224 4 m3/g, specific surface area of remoulded ore body is 4.205 m2/g,cumulative to-tal pore volume of remoulded ore body is 0.236 5 m3/g. The process of remodeling has changed pore size distri-bution of undisturbed ore body and increased specific surface area of ore body about 3.2 times than before. However, the effective pore volume had no clear changes, which make remolded ore body possess better infil-tration effect and poor penetrability.