Coupling relationship between multicomponent recovery of rare earth tailings
About 90 % rare earth minerals and many other valuable minerals are heaped as iron tailings without comprehensive utilization. In order to comprehensively recover these valuable minerals, in a view of the valuable ore type of Baotou Steel tailing and embedded features, valuable components flow and their respective recovery coupling relationship in beneficiation flowsheet were analyzed; process flows and parameters which could give consideration to four kinds of components were determined. TFe, rare earth oxide (REO), niobium and fluorite recoveries could reach 72.70 %, 81.84 %, 78.58 % and 60.18 % in low-intensity/high-intensity magnetic separation, respectively. High-intensity magnetic concentration was treated by REO direct flotation; the recovery is 75.43 %, on the base of which Fe could be separated completely from Nb. The underflow was treated by reduction roasting–low-intensity magnetic separation. And the relationship between the recoveries of these valuable components was also discussed.
KeywordsRare earth tailings Recovery Coupling relationship
This study was financially supported by the National High Technology Research and Development Program of China (No. 2012AA062402).
- Yang KF, Fan HR, Santosh M, Hu FF, Wang KY. Mesoproterozoic carbonatitic magmatism in the Bayan Obo deposit, Inner Mongolia, North China: constraints for the mechanism of super accumulation of rare earth elements. Ore Geol Rev. 2011;40(1):122.Google Scholar
- Yin SH, Wu WY, Bian X, Luo Y, Zhang FY. Solvent extraction of La(III) from chloride medium in the presence of two water soluble complexing agents with di-(2-ethylhexyl) phosphoric acid. I&EC Res. 2013;52(25):8558.Google Scholar
- Yu XL, Liu J, Wang Z. New progress in comprehensive utilization of tailings in Bao Steel’s concentrator. Multipurp Util Miner Resour. 2007;32(03):33.Google Scholar
- Fang J, Zhao DG. Separation of rare-earth from tailings of magnetite separation in Bao Steel’s concentrator. Metal Mine. 2007;321:47.Google Scholar
- Yu XL, Lang XC, Zhang LQ, Wang ZC. Extraction of rare earth, niobium and thorium from tailings by Na2CO3 roasting-HNO3 leaching. Natl Conf Rare Earth Chem Anal. 2011;23(5):566.Google Scholar
- Zhang WH, Zheng Y, Qin YQ. Concentrating of rare earths in tailings from concentrating mill of Baotou Iron and Steel Co. Hydrometall China. 2011;21(1):36.Google Scholar
- Chen QY. Study on recovery of Fe from a tailing of rare-earth metal flotation in Baotou Iron and Steel Company. Conserv Util Miner Resour. 1997;01:51.Google Scholar
- Han YX, Gao P, Li YJ, Sun YS. Research on the separation of deoxidized samples of hematite ore from Bayan Obo. Mod Min. 2010;500(12):28.Google Scholar
- Ji JM. Recovery experiment of iron and rare-earth minerals from tailings of inverse flotation in dressing plant of Bao Steel. Metal Mine. 2013;441:158.Google Scholar