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Yang Z, Zheng Y, Ma Z, Cheng L, Wang G, Qin Y. Medium-temperature calcination and acid pressure leaching extract the Al 2O 3 from coal gangue: activation mechanism and kinetic analysis. RSC Adv 2024; 14:11266-11275. [PMID: 38595717 PMCID: PMC11002565 DOI: 10.1039/d3ra08901k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Accepted: 03/20/2024] [Indexed: 04/11/2024] Open
Abstract
Bauxite is an important strategic resource, and it is facing with the problem of balance between high demand of bauxite ore and low resource of bauxite reserves in China. This research takes the Fuxin coal gangue as the object and extracts Al2O3 by medium-temperature calcination and acid pressure leaching process. The results show that at a calcination temperature of 650 °C, calcination time of 2 h, acid pressure leaching temperature of 160 °C and acid pressure leaching time of 6 h, the extraction ratio of Al2O3 reaches 80.19%. Furthermore, the research finding that the complete activation temperatures of kaolinite and muscovite are 650 °C and 850 °C, respectively, and the decomposition reactions of active Si, active Al, and metakaolinite occur above 800 °C, which leads to a low extraction ratio of Al2O3. The acid pressure leaching process can directly destroy the muscovite structure at a calcination temperature of 650 °C. The acid pressure leaching kinetic equations are studied by three kinetic models, and the apparent activation energies of the reactions are calculated by the Arrhenius formula. The results show that acid pressure leaching is subject to solid residue in-layer diffusion control, and the kinetic equation is "". The apparent activation energy is 13.48 kJ mol-1.
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Affiliation(s)
- Zhiyong Yang
- School of Mechanical Engineering, Liaoning Technical University Fuxin 123000 China
- Zhundong Energy Research Institute, Xinjiang Tianchi Energy Sources Co., Ltd 831100 Changji China
| | - Yunsheng Zheng
- College of Mining, Liaoning Technical University Fuxin 123000 China +86-139-4188-1359 +86-183-4284-7818
| | - Zhijun Ma
- College of Mining, Liaoning Technical University Fuxin 123000 China +86-139-4188-1359 +86-183-4284-7818
- College of Materials Science & Engineering, Liaoning Technical University Fuxin 123000 China
| | - Liang Cheng
- College of Mining, Liaoning Technical University Fuxin 123000 China +86-139-4188-1359 +86-183-4284-7818
| | - Guangming Wang
- College of Mining, Liaoning Technical University Fuxin 123000 China +86-139-4188-1359 +86-183-4284-7818
| | - Ying Qin
- College of Mining, Liaoning Technical University Fuxin 123000 China +86-139-4188-1359 +86-183-4284-7818
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Zhao J, Yu T, Zhang H, Zhang Y, Ma L, Li J, Qu C, Wang T. Study on Extraction Valuable Metal Elements by Co-Roasting Coal Gangue with Coal Gasification Coarse Slag. Molecules 2023; 29:130. [PMID: 38202713 PMCID: PMC10779775 DOI: 10.3390/molecules29010130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/13/2023] [Accepted: 12/19/2023] [Indexed: 01/12/2024] Open
Abstract
Coal gangue (CG) and coal gasification coarse slag (CGCS) possess both hazardous and resourceful attributes. The present study employed co-roasting followed by H2SO4 leaching to extract Al and Fe from CG and CGCS. The activation behavior and phase transformation mechanism during the co-roasting process were investigated through TG, XRD, FTIR, and XPS characterization analysis as well as Gibbs free energy calculation. The results demonstrate that the leaching rate of total iron (TFe) reached 79.93%, and Al3+ achieved 43.78% under the optimized experimental conditions (co-roasting process: CG/CGCS mass ratio of 8/2, 600 °C, 1 h; H2SO4 leaching process: 30 wt% H2SO4, 90 °C, 5 h, liquid to solid ratio of 5:1 mL/g). Co-roasting induced the conversion of inert kaolinite to active metakaolinite, subsequently leading to the formation of sillimanite (Al2SiO5) and hercynite (FeAl2O4). The iron phases underwent a selective transformation in the following sequence: hematite (Fe2O3) → magnetite (Fe3O4) → wustite (FeO) → ferrosilite (FeSiO3), hercynite (FeAl2O4), and fayalite (Fe2SiO4). Furthermore, we found that acid solution and leached residue both have broad application prospects. This study highlights the significant potential of co-roasting CG and CGCS for high-value utilization.
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Affiliation(s)
- Jincheng Zhao
- Yan’an Key Laboratory of Low Carbon Synergistic Control Technology and Reservoir Protection for Oil and Gas Field Environmental Pollution, Shaanxi Fuquan Environmental Protection Technology Co., Ltd., Yan’an 727500, China; (J.Z.); (H.Z.); (Y.Z.); (L.M.); (C.Q.)
- State Key Laboratory of Petroleum Pollution Control, College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, China; (J.L.); (T.W.)
- Shaanxi Oil and Gas Pollution Control and Reservoir Protection Key Laboratory, College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, China
| | - Tao Yu
- Yan’an Key Laboratory of Low Carbon Synergistic Control Technology and Reservoir Protection for Oil and Gas Field Environmental Pollution, Shaanxi Fuquan Environmental Protection Technology Co., Ltd., Yan’an 727500, China; (J.Z.); (H.Z.); (Y.Z.); (L.M.); (C.Q.)
- State Key Laboratory of Petroleum Pollution Control, College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, China; (J.L.); (T.W.)
- Shaanxi Oil and Gas Pollution Control and Reservoir Protection Key Laboratory, College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, China
| | - Huan Zhang
- Yan’an Key Laboratory of Low Carbon Synergistic Control Technology and Reservoir Protection for Oil and Gas Field Environmental Pollution, Shaanxi Fuquan Environmental Protection Technology Co., Ltd., Yan’an 727500, China; (J.Z.); (H.Z.); (Y.Z.); (L.M.); (C.Q.)
| | - Yu Zhang
- Yan’an Key Laboratory of Low Carbon Synergistic Control Technology and Reservoir Protection for Oil and Gas Field Environmental Pollution, Shaanxi Fuquan Environmental Protection Technology Co., Ltd., Yan’an 727500, China; (J.Z.); (H.Z.); (Y.Z.); (L.M.); (C.Q.)
| | - Lanting Ma
- Yan’an Key Laboratory of Low Carbon Synergistic Control Technology and Reservoir Protection for Oil and Gas Field Environmental Pollution, Shaanxi Fuquan Environmental Protection Technology Co., Ltd., Yan’an 727500, China; (J.Z.); (H.Z.); (Y.Z.); (L.M.); (C.Q.)
- Shaanxi Oil and Gas Pollution Control and Reservoir Protection Key Laboratory, College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, China
| | - Jinling Li
- State Key Laboratory of Petroleum Pollution Control, College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, China; (J.L.); (T.W.)
- Shaanxi Oil and Gas Pollution Control and Reservoir Protection Key Laboratory, College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, China
| | - Chengtun Qu
- Yan’an Key Laboratory of Low Carbon Synergistic Control Technology and Reservoir Protection for Oil and Gas Field Environmental Pollution, Shaanxi Fuquan Environmental Protection Technology Co., Ltd., Yan’an 727500, China; (J.Z.); (H.Z.); (Y.Z.); (L.M.); (C.Q.)
- State Key Laboratory of Petroleum Pollution Control, College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, China; (J.L.); (T.W.)
| | - Te Wang
- State Key Laboratory of Petroleum Pollution Control, College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, China; (J.L.); (T.W.)
- Shaanxi Oil and Gas Pollution Control and Reservoir Protection Key Laboratory, College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an 710065, China
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Kong D, Zhou Z, Song S, Jiang R. Acid Leaching Extraction Mechanism of Aluminum and Iron Ions from Coal Gangue Based on CaF 2 Assistance and Process Optimization. MATERIALS (BASEL, SWITZERLAND) 2023; 16:ma16020499. [PMID: 36676241 PMCID: PMC9864261 DOI: 10.3390/ma16020499] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/14/2022] [Accepted: 12/16/2022] [Indexed: 06/12/2023]
Abstract
To reveal how CaF2 improves the dissolution ratios of aluminum and iron ions in coal gangue, CaF2 and hydrochloric acid are used to extract Al3+ and Fe3+ from the coal gangue calcined powder. The leaching ratios of Al3+ and Fe3+ are measured, and the filter residues are analyzed by BET, XRD, and SEM. The results show that adding 3% CaF2 could increase the extraction ratio of Al3+ from 62.96% to 92.10% under optimized conditions, and that of Fe3+ is increased from 85.12% to 95.73%. The mechanism of CaF2 as an auxiliary to improve the leaching ratio of Fe3+ is that HF reacts with the thin layers of gangue calcined powder containing silica to form soluble SiF4, thus forming pores that promote the diffusion of H+ and inner ions, improving the leaching ratios of Al3+ and Fe3+. Finally, the CaF2-assisted acid leaching process is optimized. The results showed that it is efficient and feasible to extract Al3+ and Fe3+ with the assistance of CaF2 and that HF has a catalytic effect in the reaction system. This work provides a reference for the next step of actual production.
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Affiliation(s)
- Deshun Kong
- Guizhou Provincial Key Laboratory of Coal Clean Utilization, School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221016, China
| | - Zihan Zhou
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221016, China
| | - Shuojiang Song
- Guizhou Provincial Key Laboratory of Coal Clean Utilization, School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221016, China
| | - Rongli Jiang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221016, China
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Kong D, Zhou Z, Song S, Feng S, Lian M, Jiang R. Correction: Kong et al. Preparation of Poly Aluminum-Ferric Chloride (PAFC) Coagulant by Extracting Aluminum and Iron Ions from High Iron Content Coal Gangue. Materials 2022, 15, 2253. MATERIALS 2022; 15:ma15093104. [PMID: 35591746 PMCID: PMC9105062 DOI: 10.3390/ma15093104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 04/15/2022] [Indexed: 11/29/2022]
Affiliation(s)
- Deshun Kong
- Guizhou Provincial Key Laboratory of Coal Clean Utilization, School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China; (D.K.); (S.S.); (S.F.); (M.L.)
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221016, China;
| | - Zihan Zhou
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221016, China;
| | - Shuojiang Song
- Guizhou Provincial Key Laboratory of Coal Clean Utilization, School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China; (D.K.); (S.S.); (S.F.); (M.L.)
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221016, China;
| | - Shan Feng
- Guizhou Provincial Key Laboratory of Coal Clean Utilization, School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China; (D.K.); (S.S.); (S.F.); (M.L.)
| | - Minglei Lian
- Guizhou Provincial Key Laboratory of Coal Clean Utilization, School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui 553004, China; (D.K.); (S.S.); (S.F.); (M.L.)
| | - Rongli Jiang
- School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221016, China;
- Correspondence:
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