织金风化磷块岩中离子吸附型稀土的淋滤浸出试验

发布时间：2018-01-01 10:26

本文关键词：织金风化磷块岩中离子吸附型稀土的淋滤浸出试验　出处：《稀土》2016年02期 　论文类型：期刊论文

【摘要】：为证实贵州织金磷矿床中存在类似中国南方花岗岩风化壳离子吸附型存在形式的稀土,首先分析和确定了风化磷矿石的矿物组成主要为胶磷矿和白云石,以及含不足5%的黏土矿物和其它次要矿物,稀土总量介于1200×10~(-6)~1700×10~(-6)之间,Y、La、Nd和Ce四元素占稀土总量的82%以上的稀土配分特征,然后利用硫酸铵溶液对采自矿区地表的风化磷矿进行浸泡后过滤,再利用ICP-MS法对过滤液进行了稀土全分析。结果滤液中各稀土组分都显示一定的含量,稀土总量平均值为3.313μg/m L,其中浸出的稀土以Tm、Eu、Er、Ho和Dy为主,占90%以上,可见浸出的稀土与原矿中稀土组分的含量高低无关,表明织金磷矿床中存在以中、重稀土为主的离子吸附型稀土,但所占比例小,远低于类质同象存在形式的稀土。离子吸附型稀土的成因与漫长时限的风化作用导致稀土从矿物晶格中解离出来以及黏土矿物等所起的吸附载体作用密切相关。
[Abstract]:In order to confirm the existence of rare earth elements in the Zhijin phosphate deposit of Guizhou Province similar to the ion-adsorbed form of weathered granite in southern China, the mineral composition of the weathered phosphate rock is analyzed and determined to be mainly composed of colloidal phosphate rock and dolomite. The total amount of rare earth in clay and other minor minerals containing less than 5% is between 1 200 脳 10 ~ (-6) and 1 700 脳 10 ~ (10) ~ (6)). ND and ce four elements account for more than 82% of the total rare earth elements of the rare earth partition characteristics. Then the ammonium sulfate solution is used to soak and filter the weathered phosphate rock collected from the surface of the mining area. The rare earth elements in the filtrate were analyzed by ICP-MS method. Results the average amount of rare earth elements in the filtrate was 3.313 渭 g 路mL ~ (-1) 路min ~ (-1) ~ (-1) 路min ~ (-1) 路min ~ (-1) ~ (-1) ~ (-1). The main rare earths leached out are Tmcr EuEU Ern Ho and Dy, accounting for more than 90%. It can be seen that the leaching rare earths have nothing to do with the content of rare earth components in the raw ore, which indicates that there is a middle ore deposit in the Zhijin Phosphate deposit. Heavy rare earth is mainly ion adsorbed rare earth, but the proportion is small. The genesis of ion-adsorbed rare earths is closely related to the weathering of long time periods resulting in the dissociation of rare earths from mineral lattices and the adsorption of clay minerals.
【作者单位】：中化地质矿山总局化工地质调查总院;中国地质大学(北京)地球科学与资源学院;
【基金】：中国地质大调查项目(1212011220803)
【分类号】：P618.7
【正文快照】： 贵州织金沉积型含稀土磷块岩矿床聚集区中伴生稀土资源量大,品位相对较高,具开发利用潜力[1~3],但制约伴生稀土综合利用的关键难题是稀土的赋存状态差。弄清稀土的赋存规律是稀土开发利用的前提[4,5],过去研究多表明织金磷块岩中稀土主要以类质同象替换钙、镁离子存在于胶磷矿

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