摘要
滇中某稀土金属风化壳型矿床是碱性正长岩风化后形成的以镧、铈、镨和钕为主的风化壳轻稀土矿床,属国内罕见的超大型稀土资源类型。为了更好地开发利用该稀土资源,对其进行工艺矿物学研究。结果表明:(1)矿石的主要构造有松散块状构造和土状、粉末状构造;矿石的主要结构有变余斑状结构、显微鳞片变晶结构和碎裂、碎斑结构。(2)矿石中矿物相的稀土主要以氟碳铈矿与独居石为主,占49.52%;独居石常充填于高岭石、云母间隙中,或与高岭石、云母、正长石连生;在-0.15 mm粒级中,氟碳铈矿多为解离的单体,少数与高岭石连生。(3)矿石中的稀土矿物总量为0.208%,离子吸附型的稀土矿物占50.48%,达到离子吸附型轻稀土资源全相最低工业品位指标标准,可考虑采用原地注浸的工艺进行综合回收。
The rare earth metal weathering crust deposits in the center of Yunnan belongs to the super large rare earth resource types,which are the weathering crust light rare earth deposits mainly consisting of lanthanum,cerium,praseodymium and neodymium formed by alkaline syenite weathering. In order to fully develop and utilize the rare earth resource,the processing mineralogy of the ore was studied.The results showed that：（1）The main textures of the ore are loose bulk texture and soil type and powdery texture.The main structures in the ore are blastoporphyritic structure,microscopic scales blastic structure,ataclastic and porphyroclastic structure.（2）The rare earth with mineral phase in the ore is dominated by bastnaesite and monazite,accounting for 49.52%.The monazite often fills in gaps between kaolinite and mica,or intergrows with kaolinite,mica,and potash feldspar.In the-0.15 mm particle size,most of bastnaesite are dissociative monomer,and few of them intergrows with kaolinite.（3）The total amount of rare earth minerals in the ore is 0.208%,and the ion adsorption type rare earth minerals account for 50.48%.It has reached the minimum industrial grade standard of the ion adsorption type in the light rare earth resources. So the process of situ leaching can be considered to make comprehensive recovery of the ore.
出处
《金属矿山》
CAS
北大核心
2017年第11期108-111,共4页
Metal Mine
基金
云南省技术创新人才培养项目(编号:2014HB074)
昆明市产业创新发展重大项目(编号:2015-2-G-01984)
关键词
离子型稀土
独居石
氟碳铈矿
工艺矿物学
结构构造
Ion-type rare earth, Monazite, Bastnaesite, Processing mineralogy, Structure
