Optimization of Oxidative Leaching for Vanadium Extraction from Low-Grade Stone Coal Using Response Surface Methodology

Zulv Huang; Tao Chen; Yang Zhou; Wenbin Xu; Hanzhi Lin; Bo Yan

LAPSE

Living Archive for Process Systems Engineering

LAPSE:2021.0536

Published Article

LAPSE:2021.0536

Optimization of Oxidative Leaching for Vanadium Extraction from Low-Grade Stone Coal Using Response Surface Methodology

Zulv Huang, Tao Chen, Yang Zhou, Wenbin Xu, Hanzhi Lin, Bo Yan

June 21, 2021

The feasibility and kinetics of vanadium (V) recovery from oxidative leaching of low-grade stone coal using MnO2 were investigated. Oxidative leaching processes (OLPs) were designed using response surface methodology (RSM) based on the central composite design (CCD) model. The results show that the order of factors that influence OLPs is leaching temperature > H2SO4 concentration > leaching time > MnO2 dosage. The interaction between leaching temperature and H2SO4 concentration on the OLP is the most significant. Vanadium leaching efficiency was 89.3% using 31% H2SO4 and 3% MnO2 at 90 °C for 7.9 h. The kinetics of V leaching from stone coal show that the leaching rate is controlled by chemical reaction through a layer according to the shrinking core model and the activation energy is 55.62 kJ/mol. A comparison of the SEM-EDS results of minerals before and after leaching confirms that the muscovite structure was significantly destroyed and V and aluminum (Al) were effectively dissolved during the OLP.

Record ID

LAPSE:2021.0536

Keywords

kinetics, Optimization, oxidation leaching, stone coal, vanadium

Subject

Other

Suggested Citation

Huang Z, Chen T, Zhou Y, Xu W, Lin H, Yan B. Optimization of Oxidative Leaching for Vanadium Extraction from Low-Grade Stone Coal Using Response Surface Methodology. (2021). LAPSE:2021.0536

Author Affiliations

Huang Z: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; School of Earth and Planetary, University of Chinese Academy of Sciences, Beijing 100049, China
Chen T: SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Envir
Zhou Y: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; School of Earth and Planetary, University of Chinese Academy of Sciences, Beijing 100049, China
Xu W: Dongjiang Environmental Company Limited, Shenzhen 518000, China
Lin H: State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; School of Earth and Planetary, University of Chinese Academy of Sciences, Beijing 100049, China [ORCID]
Yan B: SCNU Environmental Research Institute, Guangdong Provincial Key Laboratory of Chemical Pollution and Environmental Safety & MOE Key Laboratory of Theoretical Chemistry of Environment, South China Normal University, Guangzhou 510006, China; School of Envir

Journal Name

Processes

Volume

8

Issue

12

Article Number

E1534

Year

2020

Publication Date

2020-11-25