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© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.

Abstract

Sulfuric acid curing and leaching is a promising technology for treating refractory ores. In this work, a refractory concentrate containing 3191 ppm uranium (U), 2135 ppm niobium (Nb), and 0.7% rare earth minerals (REMs) went through two stages: curing by high-concentration H2SO4 and leaching by low-concentration H2SO4. We investigated the behavior of those valuable metals during the two stages. For both curing and leaching, the operating parameters include the acid-to-solid ratio, time, temperature, and H2SO4 concentration. The recovery for U, Nb, and REMs was as high as 95%, 86%, and 73.5% using a curing acid-to-solid ratio of 1:1, curing temperature of 200 °C, curing time of 1 h, H2SO4 concentration of 98%, leaching liquid-to-solid ratio of 4:1, leaching time of 2 h, leaching temperature of 60 °C, and leaching H2SO4 concentration of 5 g/L. A “sulfuric acid curing–leaching-U extraction by N235–Nb recovery by resin adsorption–REMs’ recovery by resin adsorption” method was implemented, where the overall U, Nb, and REMs’ recovery reached 93.1%, 84.5%, and 69.6%, respectively.

Details

Title
Recovery of Valuable Metals from Polymetallic Refractory Concentrate by a Sulfuric Acid Curing and Leaching Method
Author
Jiang, Wei 1 ; Xue, Jilai 2 ; Jiang, Kaixi 3 ; Jiang, Xunxiong 3 ; Wang, Shengdong 3 ; Hu, Jinping 4 ; Northwood, Derek O 5 ; Waters, Kristian E 6   VIAFID ORCID Logo  ; Ma, Hao 3 

 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China[email protected] (J.X.); BGRIMM Technology Group, Beijing 100070, China 
 School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China[email protected] (J.X.) 
 BGRIMM Technology Group, Beijing 100070, China 
 224 Group Co., Ltd., SINO Shaanxi Nuclear Industry Group, Xi’an 710024, China 
 Department of Mechanical, Automotive and Materials Engineering, University of Windsor, 401 Sunset Avenue, Windsor, ON N9B 3P4, Canada; [email protected] 
 Department of Mining and Materials Engineering, McGill University, 3610 University Rd, Montreal, QC H3A 0C5, Canada 
First page
7
Publication year
2024
Publication date
2024
Publisher
MDPI AG
e-ISSN
22978739
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2918781728
Copyright
© 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.