Rare Earth Elements in Zhijin Phosphorite and Distribution in Two-Stage Flotation Process
Zhijin phosphorite is one of super large-scale medium-low grade and REE-bearing phosphorite deposit in Southwest of China. Previous investigations had revealed that this deposit contained appreciable amounts of rare earth elements (REE) reaching up to 1300μg·g<,-1>. In this paper, REE contents and existing state in single collophanite and dolomite mineral were further analyzed by ICP-MS and EPMA-1600 Electric Probe methods. The results indicated that REE content of collophanite was far more than that of dolomite, and increased with an increase of phosphor. There existed independent minerals of REE in single collophanite mineral, such as cerianite and monazite, but the amount of them was extremely little. No independent mineral of yttrium was found in this investigation. Presumedly, REE and yttrium were present in the form of ions in the lattices of collophanite. Based on above investigation, the two-stage reverse flotation technology was carried out to see the distribution of REE in flotation process. It was found that REE was mainly enriched in phosphate concentrate and recovered in the rough stage flotation. REE recovery of concentrate increased with an increase of P<,2>O<,5> content and P<,2>O<,5> recovery of concentrate. Under the optimum flotation condition, REE recovery was 79.25％ in the rough stage flotation and 9.94％ in scavenging flotation.
rare earth elements phosphorite distribution of REE flotation rare earths
Li Junqi(李军旗) Jin Huixin(金会心) Chen Yue (陈跃) Mao Xiaohao(毛小浩)
Materials and Metallurgy Engineering College, Guizhou University, Guiyang 550003, China Guizhou Hongfu Industry Exp. Ltd. Corp., Fuquan 550500, China
国际会议
第五届国际稀土开发与应用研讨会(The Fifth International Conference on Rare Earth Decelopment and Applicatin)
包头
英文
85-90
2007-08-07（万方平台首次上网日期，不代表论文的发表时间）