Abstract
A leaching experiment on simulated rare earth ore pillars with uneven grade distribution was conducted because of the readsorption of rare earth elements in the in situ leaching process of ion-adsorption-type rare earth ore. Results show that the readsorption of rare earth elements in the barren layer is the main reason for the decrease in rare earth concentration in the leachate, decrease in rare earth recovery and extension of the leaching process. This limitation could be affected by the concentration of rare earth of the influent flow passing through the barren ore layer, and pH value of leaching agents shows minimal effect during leaching. The magnesium sulfate leaching process requires higher liquid-to-solid ratio than the ammonium sulfate leaching process. The former also has lower peak value of rare earth concentration and more significant tailing in the leaching curve. The readsorption of rare earth elements in the barren layer is more severe in magnesium sulfate leaching than in ammonium sulfate leaching. Thus, areas without ore belts should be avoided when magnesium sulfate is used for leaching.
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References
Chen ZH. Global rare earth resources and scenarios of future rare earth industry. J Rare Earths. 2011;29(1):1.
Chi RA, Tian J. Weathered Crust Elution-Deposited Rare Earth Ores. New York: Nova Science Publishers Inc.; 2008. 1.
Chi RA, Tian J, Li ZJ, Peng C, Wu YX, Li SR, Wang CW, Zhou ZH. Existing state and partitioning of rare earth on weathered ores. J Rare Earths. 2005;23(6):756.
Feny ZY, Huang XW, Wang M, Zhang GC. Progress and trend of green chemistry in extraction and separation of typical rare earth resources. Chin J Rare Met. 2017;41(5):604.
Huang XW, Long ZQ, Wang LS, Feng ZY. Technology development for rare earth cleaner hydrometallurgy in China. Rare Met. 2015;34(4):215.
Luo XP, Zou LP, Ma PL, Luo CG, Xu J, Tang XK. Removing aluminum from a low-concentration lixivium of weathered crust elution-deposited rare earth ore with neutralizing hydrolysis. Rare Met. 2017;36(8):685.
Chi RA, Tian J. Review of weathered crust rare earth ore. J Chin Rare Earth Soc. 2007;25(6):641.
Qiu TS, Feng XH, Wu HQ, Zeng QH, Zhu DM. Leaching behaviors of iron and aluminum elements of ion-absorbed are earth ore with a new impurity depressant. Trans Nonferrous Met Soc. 2014;24(9):2986.
Yang YM, Wang L, Xiao M, Huang J, Lan QF, Du CJ. Study of leaching behaviors of main materials in ionic rare earth ore. Nonferrous Met Sci Technol. 2016;7(3):125.
Chi RA, Tian J, Luo XP, Xu ZH, He ZY. Basic research on the weathered crust elution-deposited rare earth ores. In: Proceedings of the 52nd Conference of Metallurgists (COM 2013). Montreal; 2013. 189.
Deng GQ, Yang YM. A Review of the mining technologies of ion-absorbed rare earth mineral. J Chin Rare Earth Soc. 2016;37(3):129.
Li YX, Zhou XM, Liu YZ, Li DP, Li P, Tang Q. Development of high efficiency extraction and separation technologies of rare earths from ion-adsorbed type deposit. J Chin Rare Earth Soc. 2012;30(3):257.
Yang XL, Zhang JW. Recovery of rare earth from ion-adsorption rare earth ores with a compound lixiviant. Sep Purif Technol. 2015;142:203.
Jing QX, Guo H, Huang XD, Wang W, Zhong SW, Huang YX. Study on adsorption of ammonium by kaolinite in soil of ionic rare earth mining area. Chin Min Mag. 2016;25(12):64.
Luo CG, Luo XP, Su J, Chen CF, Han DX. Environmental problems and treatment measures in ionic-type rare earth mine. Met Mine. 2014;43(6):91.
Wang ZG, Wang JR, Peng WB, Yang JH. Treatment of waste water from mining process of ionic rare earth with membrane separation technology. J Chin Rare Earths Soc. 2017;38(1):102.
Tian J, Yin JQ, Chen KH, Rao GH, Jiang MT, Chi RA. Optimisation of mass transfer in column elution of rare earths from low grade weathered crust elution-deposited rare earth ore. Hydrometallurgy. 2010;103(1):211.
Xiao YF, Feng ZY, Hu GH, Huang L, Huang XW, Chen YY, Li ML. Leaching and mass transfer characteristics of elements from ion-adsorption type rare earth ore. Rare Met. 2015;34(5):357.
Li H, Xu ZG, Yu JX, Zhang YF, Chi RA. Study on ore properties of the weathered crust elution deposited rare earth ore and rare earth contents in various grain size. J Chin Rare Earths Soc. 2012;33(2):14.
Chi RA, Tian J. Hydrometallurgy of the Weathered Crust Elution-Deposited Rare Earth Ores. Beijing: Science Press; 2006. 29.
Zhang L, Wu KX, Chen LK, Zhu P, Ouyang H. Overview of metallogenic features of ion-adsorption type REE deposits in southern Jiangxi province. J Chin Rare Earths Soc. 2015;33(1):10.
Li C, Shao YS. The study of anti-adsorption in the in situ leaching of ionic RE mine. Jiangxi Nonferrous Met. 2001;15(4):5.
Tang XZ, Li MN, Yang D. The problem of reabsorption of ion-absorbed rare earth mineral in situ leaching mining and the measure to overcome it. J Cent South Univ (Sci & Technol). 1998;29(6):523.
Chi RA, Wang DZ. Rare Earth Minerals Processing. Beijing: Science Press; 2014. 286.
Tian J, Yin JQ, Chi RA, Rao GH, Jiang MT, Ouyang KX. Kinetics on leaching rare earth from the weathered crust elution-deposited rare earth ores with ammonium sulfate solution. Hydrometallurgy. 2010;101(3–4):166.
He ZY, Zhang ZY, Yu JX, Chi RA. Behaviors of rare earth, aluminum and ammonium in leaching process of weathered crust elution-deposited rare earth ore. Chin Rare Earths. 2015;36(6):18.
Tian J, Tang XK, Yin JQ, Chen J, Luo XP, Rao GH. Enhanced leachability of a lean weathered crust elution-deposited rare earth ore: effects of Sesbania gum filter-aid reagent. Metall Mater Trans B. 2013;44(5):1070.
Guo ZJ, Xu J, Shi KL, Tang YQ, Wu WS, Tao ZY. Eu(III) adsorption/desorption on Na-bentonite: experimental and modeling studies. Colloids Surf A Physicochem Eng Asp. 2009;339(1):126.
Moldoveanu GA, Papangelakis VG. Recovery of rare earth elements adsorbed on clay minerals: II. Leaching with ammonium sulfate. Hydrometallurgy. 2013;131:158.
Wang L, Liao CF, Yang YM, Xu HB, Xiao YF, Yan CH. Effects of organic acids on the leaching process of ion-adsorption type rare earth ore. J Rare Earths. 2017;35(12):1235.
Tian J, Chi RA, Yin JQ. Leaching process of rare earths from weathered crust elution-deposited rare earth ore. Trans Nonferrous Met Soc. 2010;20(5):892.
Xiao YF, Feng ZY, Huang XW, Long ZQ. Recovery of rare earths from weathered crust elution-deposited rare earth ore without ammonia-nitrogen pollution: I. Leaching with magnesium sulfate. Hydrometallurgy. 2015;153:58.
Zhang TT, Zhang ZY, Xu ZG, Li Q, Chi RA. Study of leaching of rare earth from weathered crust elution deposited rare earth ores with mixed ammonium salt. Nonferrous Met (Extr Metall). 2014;61(8):30.
He ZY, Zhang ZY, Yu JX, Xu ZG, Xu YL, Fang Z, Chi RA. Column leaching process of rare earth and aluminum from weathered crust elution-deposited rare earth ore with ammonium salts. Trans Nonferrous Met Soc. 2016;26(11):3024.
He ZY, Zhang ZY, Yu JX, Xu ZG, Chi RA. Process optimization of rare earth and aluminum leaching from weathered crust elution-deposited rare earth ore with compound ammonium salts. J Rare Earths. 2016;34(4):413.
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This study was financially supported by the National Natural Science Foundation of China (No. 5177041221).
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Wang, L., Wang, C., Li, L. et al. Readsorption of rare earth elements during leaching process of ion-adsorption-type rare earth ore. Rare Met. 42, 2113–2120 (2023). https://doi.org/10.1007/s12598-018-1162-3
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DOI: https://doi.org/10.1007/s12598-018-1162-3