One step purification of impurities in the leachate of weathered crust elution-deposited rare earth ores
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Wuhan Institute of Technology
 
 
Publication date: 2014-05-22
 
 
Corresponding author
Ruan Chi   

Wuhan Institute of Technology, 693 Xiongchu Avenue, Wuhan, Hubei,P. R. China, 430073 Wuhan, China
 
 
Physicochem. Probl. Miner. Process. 2017;53(2):1188-1199
 
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ABSTRACT
It is necessary to control and reduce the high content of Al3+, Cu2+ and Pb2+ ions in the leachate of weathered crust elution-deposited rare earth ore to facilitate the rare earth recovery and the quality of rare earth products. Neither NH4HCO3 nor Na2S are suitable for removal of all impurity ions and meanwhile maintain high rare earth recovery. Conventionally, NH4HCO3 is firstly adopted to remove Al3+, and then Cu2+ and Pb2+ are removed by using Na2S. This two steps purification process is quite long and results in lots of complication in operation. In this paper, a one-step purification by using the compound of NH4HCO3 and Na2S was proposed to remove Al3+, Cu2+ and Pb2+. The results showed that after purification 89% Cu, 92% Pb and 74% Al were removed from the leachate solution by using 0.1 M compound of NH4HCO3/Na2S, while maintaining 89% rare earth. The optimal purification parameters were: volume ratio of NH4HCO3 to Na2S is 9:1, compound to leachate volume ratio of 0.05:1, precipitation time of 30 min.
 
REFERENCES (19)
1.
BOZECKA, A., BOZECKI, P., SANAK-RYDLEWSKA, S., 2016, Removal of Pb (II) and Cd (II) ions from aqueous solutions with selected organic wastes, Physicochemical Problems of Mineral Processing, 52, 1, 380-396.
 
2.
CHI R. A., TIAN J.,2008, Weathered crust elution-deposited rare earth ores, New York: Nova Science Publishers.
 
3.
CHI R. A., TIAN J., LI Z., PENG C., WU Y. X., LI S. R., WANG C. W., ZHOU Z. A., 2005, Existing state and partitioning of rare earth on weathered ores, Journal of Rare Earths, 23, 6, 756-759.
 
4.
HE Z. Y., ZHANG Z. Y., YU J. X., XU Z. G., CHI R. A., 2016a, Process optimization of rare earth and aluminum leaching from weathered crust elution-deposited rare earth ore with compound ammonium salts, Journal of Rare Earths, 34, 4, 413-419.
 
5.
HE Z. Y., ZHANG Z. Y., YU J. X., ZHOU F., XU Y. L., XU Z. G., CHEN Z., CHI R. A., 2016b, Kinetics of column leaching of rare earth and aluminum from weathered crust elution-deposited rare earth ore with ammonium salt solutions, Hydrometallurgy, 163, 33-39.
 
6.
HE Z. Y., ZHANG Z. Y., YU J. X., CHI R. A., 2015, Behavious of rare earth, aluminum and ammonium in leaching process of weathered crust elution-deposited rare earth ore, Chinese Rare Earths (in Chinese), 6, 18-24.
 
7.
HUANG X. W., LONG Z. Q., LI H. W., YING W. J., ZHANG G. C., XUE X. X., 2005, Development of rare earth hydrometallurgy technology in China, Journal of Rare Earths, 23, 1, 1-4.
 
8.
ISKRENOVA E. K., PATNAIK S. S., 2016, Solvent effects in the thermal decomposition reaction of ammonium carbamate: A computational molecular dynamics study of the relative solubilities of CO2 and NH3 in water, ethylene glycol, and their mixtures, International Journal of Heat and Mass Transfer, 100, 224-230..
 
9.
LUO X. P., FENG B., WANG P. C., ZHOU H. P., CHEN X. M., 2015a, The effect of fulvic acid on the leaching of a weathered rare-earth ore, Metallurgical and Materials Transactions B, 46, 6, 2405-2407.
 
10.
LUO X. P., ZOU L. P., MA P. L., LUO C. G., XU J., TANG X. K., 2015b, Removing aluminum from a low-concentration lixivium of weathered crust elution-deposited rare earth ore with neutralizing hydrolysis, Rare Metals, 1-6.
 
11.
MOLDOVEANU G. A., PAPANGELAKIS V. G., 2016, An overview of rare-earth recovery by ion-exchange leaching from ion-adsorption clays of various origins, Mineralogical Magazine, 80, 1, 63-76.
 
12.
MACHIDA, M., FOTOOHI, B., AMAMO, Y., MERCIER, L, 2012, Cadmium (II) and lead (II) adsorption onto hetero-atom functional mesoporous silica and activated carbon, Applied Surface Science, 258, 19, 7389-7394.
 
13.
RAO, K. S., CHAUDHURY, G. R., MISHRA, B. K., 2010, Kinetics and equilibrium studies for the removal of cadmium ions from aqueous solutions using Duolite ES 467 resin, International Journal of Mineral Processing, 97,1, 68-73.
 
14.
XIAO Y. F., LIU X. S., FENG Z. Y., HUANG X. W., HUANG L., CHEN Y. Y., WU W. Y., 2015a, Role of minerals properties on leaching process of weathered crust elution-deposited rare earth ore, Journal of Rare Earths, 33, 5, 545-552.
 
15.
XIAO Y. F., FENG Z. Y., HUANG X. W., HUANG L., CHEN Y. Y., WANG L. S., LONG Z. Q., 2015b, Recovery of rare earths from weathered crust elution-deposited rare earth ore without ammonia-nitrogen pollution: I. leaching with magnesium sulfate, Hydrometallurgy, 153, 58-65.
 
16.
YU Q. H., ZHU H. Y., LEI H., LI X. B., 1993, Precipitation of rare earth carbonate from low grade leachate of rare earth ore, Chinese Rare Earths (in Chinese), 14, 4, 14-17.
 
17.
ZHANG Z. Y., HE Z. Y., YU J. X., XU Z. G., CHI R. A., 2016, Novel solution injection technology for in-situ leaching of weathered crust elution-deposited rare earth ores, Hydrometallurgy, 164, 248-256.
 
18.
ZUO H., WANG Y. M., JIANG H. C., CHEN X. S., 2007, Seepage properties of leaching solution in ion-absorbed rare earth deposits under effect of electric field, Journal of the Chinese Rare Earth Society, 25, 1, 80.
 
19.
ZHANG L. Y., WU Z. H., ZHANG H. J., 1996, Preparation of the mixed crystalline rare earth carbonate. Chinese Rare Earths (in Chinese), 17, 3, 61-63.
 
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