摘要
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: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.
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.
出处
《有色金属科学与工程》
CAS
2016年第3期151-156,共6页
Nonferrous Metals Science and Engineering
基金
国家自然科学基金资助项目(51264008)
江西省自然科学基金资助项目(20151BAB206023
20133ACB20003)
江西省教育厅科技落地计划项目(03904)
江西省研究生创新专项资金项目(YC2015-S287)
关键词
离子型稀土矿
土-水特征曲线
孔径分布
孔隙体积
比表面积
ion-adsorption rare-earth ore
soil-water characteristic curve
pore size distribution
pore volume
specific surface area
