Mass transfer process of leaching weathered crust elution-deposited rare earth ore with magnesium salts

• Autorzy: Chen Z. , Zhang Z. , He Z. , Chi R.

Identyfikatory

DOI

https://doi.org/10.5277/ppmp18102

• Języki publikacji: EN

Abstrakty

EN

In order to optimize the leaching process of weathered crust elution-deposited rare earth ore with magnesium salts, the influence of different flow rate, concentration of magnesium ions, initial pH of magnesium salts solution and experimental temperature on the mass transfer process of rare earth and aluminum was investigated in the case of using magnesium salts as leaching agent. The relationship between the flow rate μ and the HETP (Height Equivalent of Theoretical Plate) is in accordance with the Van Deemter equation when magnesium salts were used as leaching agent. The optimum condition for rare earth and aluminum were 0.4 cm3/min of flow rate and 0.2 mol/dm3 of magnesium ion concentration of magnesium sulfate, magnesium chloride and magnesium nitrate respectively. Under this condition the mass transfer efficiency of rare earth and aluminum with three kinds of magnesium salts follow the order of Mg(NO3)2>Mg(Cl)2>MgSO4. High temperature contributes to improving the mass transfer efficiency of rare earth and aluminum. Magnesium nitrate as the leaching agent can get the highest leaching mass transfer efficiency of rare earth and magnesium sulfate as the leaching agent can make the impurity leaching and mass transfer efficiency of Al is the lowest.

Słowa kluczowe

EN

mass transfer; magnesium salts; theory plate; weathered crust elution-deposited rare earth ore

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2018
• Tom: Vol. 54, iss. 3
• Strony: 1004--1013
• Opis fizyczny: Bibliogr. 24 poz.

Twórcy

autor

Chen Z.

• Wuhan Institute Of Technology

autor

Zhang Z.

• Wuhan Institute Of Technology

autor

He Z.

• Wuhan Institute Of Technology

autor

Chi R.

• Wuhan Institute Of Technology, 693 Xiongchu Avenue, Wuhan, Hubei,P. R. China, 430073 Wuhan, China Physicochem. Probl. Miner. Process. 2018;54(3):1004–1013

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