Seepage process on weathered crust elution-deposited rare earth ores with ammonium carboxylate solution

• Autorzy: Zou Hualiang , Zhang Zhenyue , Chen Zhuo , Liu Defeng , Chai Xiuwei , Zhang Han , Chi Ru-an

Identyfikatory

DOI

10.5277/ppmp19084

• Języki publikacji: EN

Abstrakty

EN

In order to reveal the seepage law of ammonium carboxylate solution in the in-situ leaching process of weathered crust elution-deposited rare earth ores, the effects of concentration, pH, temperature, particle size and porosity on permeability were discussed in this paper. The results shown that the seepage of the leaching agent solutions in the rare earth ore follows Darcy's law and displays a laminar flow under the conditions of this experiment and seepage velocity can be increased by changing leaching conditions. The permeability coefficients are inversely proportional to concentrations of ammonium acetate, ammonium tartrate and ammonium citrate whose concentration is greater than 0.7wt%, because the insoluble complexes formed by the reaction of ammonium citrate with RE3+ at lower concentration n decrease the permeability coefficient. The permeability coefficients of ammonium carboxylate solutions increase firstly and then decrease with the pH increased. The maximum of permeability coefficients of ammonium acetate, ammonium tartrate and ammonium citrate solution were 2.92, 1.91 and 2.70, respectively, while the pH of solution were 5, 6 and 7, respectively. Increasing temperature is beneficial for the seepage of ammonium carboxylate solution in orebody, therefore, it is helpful for leaching operation in summer. Moreover, clay minerals particle size and porosity are the key factors affecting the permeability of ammonium carboxylate solution in orebody. The permeability coefficients of ammonium acetate, ammonium tartrate and ammonium citrate solutions are 2.92×104cm/s,1.90×10-4cm/s and 2.69×10-4cm/s, respectively, at the same temperature of 293K, original particle size and porosity of the ore. Ammonium acetate solution has the best permeability in orebody.

Słowa kluczowe

EN

permeability; weathered crust elution-deposited rare earth ore; ammonium carboxylate; hydrodynamics

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2020
• Tom: Vol. 56, iss. 1
• Strony: 89--101
• Opis fizyczny: Bibliogr. 29 poz., rys., tab.

Twórcy

autor

Zou Hualiang

• School of XingFa Mining Engineering, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China

autor

Zhang Zhenyue

• School of XingFa Mining Engineering, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China
• Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China

autor

Chen Zhuo

• School of XingFa Mining Engineering, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China

autor

Liu Defeng

• School of XingFa Mining Engineering, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China

autor

Chai Xiuwei

• School of XingFa Mining Engineering, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China

autor

Zhang Han

• School of XingFa Mining Engineering, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China

autor

Chi Ru-an

• School of XingFa Mining Engineering, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China
• Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, 430073, Wuhan, Hubei, China

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).