Seepage mechanism during in-situ leaching process of weathered crust elution-deposited rare earth ores with magnesium salt

• Autorzy: Liu Defeng , Zhang Zhenyue , Chi Ruan

Identyfikatory

DOI

10.37190/ppmp/117925

• Języki publikacji: EN

Abstrakty

EN

To reveal seepage mechanism during in-situ leaching process of weathered crust elution deposited rare earth ores with magnesium salt, the effects of particle gradation, particle migration, Atterberg limit on the permeability coefficient were investigated, and the relation between the particle size and rare earth content was discussed. The results showed that the ore in the humic layer (HL) with high porosity and permeability was uniformly graded particles. The ore in the completely weathered layer (CWL) with low porosity and permeability belonged to dense-graded particles. The ore in the partly weathered layer (PWL) was open-graded particles, whose permeability fell in between the HL and the PWL. The change of -0.075mm particles content was the largest in the leaching process. When - 0.075mm particle content was less than 30%, the migration ability of fine particles and the permeability coefficient decreased gradually. On the contrary, the migration ability of fine particles gradually remained stable, and the change in the permeability coefficient was not obvious. The liquid limit (LL) in the Atterberg limit of HL, CWL and PWL was inversely proportional to the permeability coefficient, and followed the order: LL_HL < LL_PWL < LL_CWL. With the -0.075mm particle content increasing, the LL of the ore samples increased gradually and finally tended to be stable. The peak value of rare earth concentration appeared earlier and the rare earth content decreased gradually with the increase of the ore particle size. This work provided a theoretical basis for achieving high-efficient mining of weathered crust elution-deposited rare earth ores.

Słowa kluczowe

EN

seepage mechanism; weathered crust elution-deposited; rare earth ores; in-situ leaching; magnesium salt

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2020
• Tom: Vol. 56, iss. 2
• Strony: 350--362
• Opis fizyczny: Bibliogr. 30 poz., rys., tab., wykr., wz.

Twórcy

autor

Liu Defeng

• School of Resource and Safety Engineering, Wuhan Institute of Technology, Wuhan 430073, Hubei, China
• Hubei Research and Design Institute of Chemical Industry, Wuhan 430073, Hubei, China
• Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China

autor

Zhang Zhenyue

• School of Resource and Safety Engineering, Wuhan Institute of Technology, Wuhan 430073, Hubei, China
• Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China

autor

Chi Ruan

• School of Resource and Safety Engineering, Wuhan Institute of Technology, Wuhan 430073, Hubei, China
• Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China

Bibliografia

• ARACENA, A., ESPINOZA, C., JEREZ, O., CARVAJAL, D., JAQUES, A., 2019. Dissolution kinetics of secondary covellite resulted from digenite dissolution in ferric/acid/chloride media. Physicochem. Probl. Miner. Process., 55(4), 840-851.
• BUNZL, K., 2001. Migration of fallout-radionuclides in the soil: effect of non-uniformity of the sorption properties on the activity–depth profiles. Radiat. Environ. Bioph. 40(3), 237-241.
• CHEN, Z., ZHANG, ZY., HE, ZY., CHI, RA., 2018. Mass transfer process of leaching weathered crust elution-deposited Mass transfer process of leaching weathered crust elution-deposited rare earth ore with magnesium salts. Physicochem. Probl. Miner. Process. 54(3), 1004-1013.
• XU, YB., XU, LH., WU, HQ., WANG, ZJ., SHU, KQ., FANG, S., ZHANG, ZY., 2020, Flotation and co-adsorption of mixed collectors octanohydroxamic acid/sodium oleate on bastnaesite. J. Alloys and Compounds, 819: 1-9.
• CHI, RA., TIAN, J., 2008. Weathered crust elution-deposited rare earth ores. New York: Nova Science Publishers.
• CHI, RA., WANG, D., 2014.Rare earth minerals processing. Beijing: Science Press.
• FIÈS, J. C., 1992. Analysis of soil textural porosity relative to skeleton particle size, using mercury porosimetry. Soil Sci. Soc. Am. J. 56(4), 1062.
• GRIM, R. E., ASLLAWAY, W. H., CUTHBERT, F. L., 2006. Reaction of different clay minerals with some organic cations. J Am. Ceram. Soc. 30(5), 137-142.
• HE, ZY., ZHANG, ZY., YU, JX., XU, ZG., CHI, RA., 2016. Process optimization of rare earth and aluminum leaching from weathered crust elution-deposited rare earth ore with compound a mmonium salts. J. Rare Earth. 34(4), 413-419.
• HE, ZY., ZHANG, ZY., CHI, RA., XU, ZG., YU, JX., WU, M., BAI, RY., 2017. Leaching hydrodynamics of weathered elution-deposited rare earth ore with a mmonium salts solution. J. Rare Earth. 35(8), 824-830.
• HUANG, XW., LI, HW., XUE, XX., ZHANG, GC., 2011. Development status and research progress in rare earth industry in China. J Rare Earth. 3, 134-137.
• LAI, FG., HUANG, L., Gao, GH., RUN, Y., XIAO, YF., 2018. Recovery of rare earths from ion-absorbed rare earths ore with MgSO4-ascorbic acid compound leaching agent. J Rare Earth., 36(5), 521-527.
• LI, YX., ZHANG, L., ZHOU, XM., 2010. Resource and environment protected exploitation model for ion-type rare earth deposit in southern of China. J Rare Earth. 31(2), 80-85.
• LI, YX., 2014. Ion adsorption rare earth resources and green extraction. Beijing: Chemical Industry Press. 362 Physicochem. Probl. Miner. Process., 56(2), 2020, 350-362
• MARCUS, M., ZHANG, L., LI, HH., 2013. Materials for civil and construction engineers. Oxford Economic Papers. 65, I7-I41.
• MBONIMPA, M., AUBERTIN, M., CHAPUIS, R. P., BUSSIÈRE, B., 2002. Practical pedotransfer functions for estimating the saturated hydraulic conductivity. Geotech. Geo. Eng. 20(3), 235-259.
• QIU, X.D., YAN, Z.L., LIU, L., WANG, H., 2004. Effect of particle-size characteristics on seepage of rockfill. Rock Soil Mech. 25(6), 950-954.
• SHEPHERD, R.G., 1989. Correlations of permeability and grain size. Groundwater. 27(5), 633-638.
• SHEIKHZADEH, GA., MEHRABIAN, MA., MANSOURI, SH., SARRAFI, A., 2005. Computational modelling of unsaturated flow of liquid in heap leaching-using the results of column tests to calibrate the model. Int. J. Heat Mass Tran., 48(2), 279-292.
• SHU, KQ., XU LH., WU HQ., FANG S., WANG ZJ., XU YB., ZHANG ZY, 2019. Effect of ultrasonic pre-treatment on the flotation of ilmenite and collector adsorption. Miner. Eng. 137, 124-132.
• SOBOUTI, A., REZAI, B., HOSEINIAN, F. S., MORADKHANI, D., 2019. Optimization and kinetics studies of lead concentrate leaching using fluoroboric acid. Physicochem. Probl. Miner. Process., 55(4), 1014-1027.
• TIAN, J., YIN, J., CHI, RA., Rao, GH., JIANG, MT., OUYANG, KX., 2010. Kinetics on leaching rare earth from the weathered crust elution-deposited rare earth ores with ammonium sulfate solution. Hydrometallurgy. 101(3), 166-170.
• WU, AX., YIN, SH., YANG, BH., WJ., QIU, GZ., 2007. Study on preferential flow in dump leaching of low-grade ores. Hydrometallurgy. 87(3-4), 124-132.
• WU, AX., YIN, SH., QIN, WQ., LIU, JS., QIU, GZ., 2009. The effect of preferential flow on extraction and surface morphology of copper sulphides during heap leaching. Hydrometallurgy. 95(1-2), 76-81.
• YANG, BH., WU, AX., MIAO, XX., LIU, JZ., 2014. 3D characterization and analysis of pore structure of packed ore particle beds based on computed tomography images. Trans. Nonferr. Metal Soc. 24 (3), 833-838.
• XIAO, YF., FENG, ZY., HU, GH., HUANG, L., HUANG, XW., CHEN, YY., LI, ML., 2015. Leaching and mass transfer characteristics of elements from ion-adsorption type rare earth ore. Rare Metals. 34(5), 357-365.
• ZHANG ZY., HE ZY., XU ZG., YU JX., ZHANG YF., CHI RA., 2016. Rare earth partitioning characteristics of China rare earth ore. Chin. Rare Earths. 37(1), 121-126.
• ZHANG ZY., SUN NJ., HE ZY., CHI RA., 2018. Local concentration of middle and heavy rare earth elements on weathered crust elution-deposited rare earth ores. J. Rare Earths, 36(5), 552-558.
• ZHANG, ZY., HE, ZY., ZHOU, F., ZHONG, CB., SUN NJ., CHI RA., 2018. Swelling of clay minerals in a mmonium leaching of weathered crust elution-deposited rare earth ores. Rare Metals. 37(1), 72-78.
• ZHOU, HL., ZHANG, ZY., CHEN Z., LIU DF., CHAI XW., ZHANG H., CHI RA., 2020. Seepage process on weathered elution-deposited rare earth ores with ammonium carboxylate solution. Physicochem. Probl. Miner. Process., 56(1), 89- 101.

Uwagi

All sources of funding of the study were supported by the National Key Research and Development Plan (2018YFC1801800) and National Nature Science Foundation of China (U1802252; 21808176; 51734001) and China Postdoctoral Science Foundation (2019M662577) and Education Department Scientific Research Project of Hubei Province (Q20191502; Q20191503) and Youths Science Foundation of Wuhan Institute of Technology (18QD50).