加拿大某地区稀土矿的工艺矿物学研究

发布时间：2018-03-03 14:15

本文选题：矿物解离度分析仪(MLA)　切入点：氟碳铈矿　出处：《稀土》2017年02期 　论文类型：期刊论文

【摘要】：加拿大某地区稀土矿稀土品位低,稀土矿物与铁白云石等脉石矿物共生伴生嵌布关系复杂,采用传统的工艺矿物学难以对稀土矿的赋存状态和粒度分布进行定量分析。因此,借助MLA、XRD、XRF和SEM对该地区所产生的矿石进行工艺矿物学研究。结果表明,矿石中轻稀土矿物主要为氟碳铈矿和独居石,其稀土品位RE_2O_3为3.66%。其它有用矿物为菱锶矿和针铁矿,品位分别为1.77%和22.91%。脉石矿物主要为铁白云石、黑云母、铁辉石。氟碳铈矿和独居石主要与菱锶矿和针铁矿相互连生与包裹,体现在氟碳铈矿与针铁矿、菱锶矿和主要脉石矿物相互穿插形成密切的嵌布关系。独居石与氟碳铈矿的嵌布关系比较密切,多分布在氟碳铈矿颗粒间及裂缝中,有时也和菱锶矿和铁辉石等矿物嵌布在一起。稀土矿中的Ce、La和Nd元素主要赋存在氟碳铈矿中。Fe元素赋存在针铁矿中Fe_2O_3占57.76%,其它主要赋存在脉石矿物铁白云石中占40.08%。当磨矿粒度在74μm所占比例为80%时,氟碳铈矿、独居石、菱锶矿和针铁矿的解离度分别为44.44%、27.71%、81.08%和34.52%。与此同时,22μm以上的氟碳铈矿、独居石、菱锶矿和针铁矿的理论回收率的预测分别为80.51%、67.75%、80.76%和85.38%。这些工艺矿物学参数为工业利用该矿的稀土选矿工艺的设计及有价元素综合回收提供理论依据。
[Abstract]:The rare earth ore in a certain area of Canada has a low grade of rare earth, and the relationship between rare earth minerals and gangue minerals such as iron dolomite is complicated, so it is difficult to quantitatively analyze the occurrence state and particle size distribution of rare earth ores by using traditional process mineralogy. The ore produced in this area was studied by SEM and MLA-XRDRF. The results show that the light rare earth minerals in the ore are mainly fluorocarbon and monazite, the RE_2O_3 of which is 3.66. The other useful minerals are rhomboxonite and goethite. The grade of gangue is 1.77% and 22.91 respectively. The gangue minerals are mainly ferrite dolomite, biotite, ferroxene, fluorocarbsite and monazite, which are mainly connected and wrapped with spinosite and goethite, which are reflected in the fluorocarbon and goethite. There is a close distribution relationship between monazite and fluorocarbon ore, and most of them are distributed in the intergranular and fracture of fluorocarbon and cerium ore, and the intergranular distribution of monazite and carcerite is very close, and the intergranular distribution of monazite and carcerite is very close. In rare earth ores, cerium La and ND are mainly found in fluorocarbon cerium ores. Fe is found in goethite, Fe_2O_3 in goethite accounts for 57.766.Other mainly occurs in gangue minerals, iron dolomite. When the grinding particle size is 74 渭 m, the ratio is 80. The dissociation degree of cerium ore, monazite, strontium ore and goethite are 44.44% and 34.52%, respectively. The theoretical recoveries of rhombic strontium ore and goethite are 80.51% and 85.38%, respectively. These mineralogical parameters provide a theoretical basis for the design of rare earth mineral processing and the comprehensive recovery of valuable elements for industrial use of the ore.
【作者单位】：武汉工程大学绿色化工过程教育部重点实验室湖北省新型反应器与绿色化学工艺重点实验室;中南大学资源加工与生物工程学院;
【基金】：国家自然科学基金项目(41472071) 湖北省教育厅优秀中青年科技创新团队项目(T201506)
【分类号】：TD91;TD955

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