赣南信丰风化壳淋积型稀土矿的吸附特性

发布时间：2018-09-17 08:12

【摘要】：风化壳淋积型稀土矿体吸附特性对于提高原地浸矿稀土浸取率具有重要意义。通过筛分获得不同粒径的风化壳淋积型稀土矿样,测试各粒径矿样的离子相稀土品位、比表面积、表面形貌以及矿物成分等,分析稀土离子在矿体中的吸附特性。研究结果表明:赣南信丰类型的稀土矿体中矿物成分有高岭石、钾长石、石英、电气石、白云母等,这5种主要矿物成分的总质量比重达到90.13%,不同矿物成分的粒度有明显的差异,小粒径矿样中高岭石和白云母的含量增加,矿样的稀土离子吸附量与高岭石等黏土矿物的含量成正相关;基于稀土离子在矿体颗粒表面凹坑的单位面积吸附量与孔径和粒径成对数正态分布,建立了稀土离子吸附量与矿体颗粒表面凹坑孔径之间关系的分析模型,运用该模型计算得到赣南信丰类型的有效吸附孔径为2.0~20.0 nm。
[Abstract]:The adsorption characteristics of weathered crust leaching rare earth ore bodies are of great significance to improve the leaching rate of in situ leaching rare earths. The rare earth mineral samples of weathered crust leaching type with different particle sizes were obtained by sieving. The rare earth grade, specific surface area, surface morphology and mineral composition of each particle size samples were measured, and the adsorption characteristics of rare earth ions in orebodies were analyzed. The results show that there are kaolinite, potassium feldspar, quartz, tourmaline, Muscovite and so on. The total mass specific gravity of the five main mineral components reached 90.13, the granularity of different mineral components was obviously different, and the contents of kaolinite and Muscovite in small size ore samples were increased. The amount of rare earth ions adsorbed by ore samples is positively correlated with the content of clay minerals such as kaolinite, and based on the logarithmic normal distribution of the amount of rare earth ions adsorbed per unit area of pits on the surface of ore bodies with pore size and particle size, An analytical model of the relationship between the adsorption capacity of rare earth ions and the pore size of pits on the surface of ore bodies was established. By using the model, the effective adsorption pore size of Xinfeng type in south Jiangxi was calculated to be 2.0 ~ 20.0 nm..
【作者单位】：江西理工大学建筑与测绘工程学院;中国科学院寒区旱区环境与工程研究所;江西理工大学资源与环境工程学院;
【基金】：国家自然科学基金资助项目(41602311,51264008) 江西省自然科学基金项目(20151BAB206023) 江西省教育厅科技落地计划项目(KJLD14042);江西省教育厅科技项目(GJJ150658)资助
【分类号】：TD865

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