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Li Y, Li S, Pan X, Zhao X, Guo P. Eco-friendly strategy for preparation of high-purity silica from high-silica IOTs using S-HGMS coupling with ultrasound-assisted fluorine-free acid leaching technology. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 339:117932. [PMID: 37058924 DOI: 10.1016/j.jenvman.2023.117932] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 04/04/2023] [Accepted: 04/11/2023] [Indexed: 05/03/2023]
Abstract
Iron ore tailings (IOTs), a typical hazardous solid waste, seriously threaten human health and the ecological environment. However, the abundance of quartz, particularly in high-silica IOTs, renders them useful. Yet, state-of-the-art technologies have rarely reported the preparation of high-purity silica from high-silicon IOTs. Thus, this study proposed an eco-friendly technology for producing high-purity silica from high-silica IOTs through the coupling of superconducting high gradient magnetic separation (S-HGMS) preconcentration with leaching followed by the use of ultrasound-assisted fluorine-free acid solution. Following an analysis of the separation index and chemical composition, the optimum conditions for the quartz preconcentration were determined as a magnetic flow ratio of 0.068 T s/m, a slurry flow velocity of 500 mL/min, and a pulp concentration of 40 g/L. Consequently, the SiO2 grade increased from 69.32% in the raw sample to 93.12% in quartz concentrate following the application of S-HGMS, with the recovery reaching 45.24%. X-ray diffraction, vibrating sample magnetometer, and scanning electron microscope analyses indicated that quartz was effectively preconcentrated from the tailings by S-HGMS. Subsequently, employing the "ultrasound-assisted fluorine-free acid leaching process," impurity elements were removed and high-purity silica was produced. Under optimal leaching conditions, the SiO2 purity of silica sand increased to 97.42%. Following a three-stage acid leaching process with 4 mol/LHCl +2 mol/LH2C2O4, the removal efficiency of Al, Ca, Fe, and Mg exceeded 97% for all cases, and the SiO2 purity in high-purity silica reached 99.93%. Thus, this study proposes a new strategy for the preparation of high-purity quartz from IOTs, which facilitated the effective realization of the high-value utility of the tailings. Furthermore, it provides a theoretical basis for the industrial application of IOTs, which is of great scientific significance and practical application value.
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Affiliation(s)
- Yongkui Li
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Suqin Li
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
| | - Xiaodong Pan
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Xin Zhao
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Penghui Guo
- School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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Sun H, Zhang M, Zou Z, Yan D. Fluidized magnetization roasting utilization of refractory siderite-containing iron ore with low gas reduction potential. ADV POWDER TECHNOL 2023. [DOI: 10.1016/j.apt.2023.103994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/10/2023]
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3
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Qiu G, Ning X, Shen J, Wang Y, Zhang D, Deng J. Recovery of iron from iron tailings by suspension magnetization roasting with biomass-derived pyrolytic gas. WASTE MANAGEMENT (NEW YORK, N.Y.) 2023; 156:255-263. [PMID: 36508909 DOI: 10.1016/j.wasman.2022.11.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 11/11/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
A major industrial solid waste, iron tailings occupy a large area and pose long-term pollution risks. The pyrolysis gas of biomass was used as reducing agent to suspension magnetize and roast iron tailings to recover iron in this study. The process conditions, phase transformation and microstructure evolution of the iron tailings, pyrolysis gas production, and reaction regulations were investigated to explain the mechanism of iron recovery by suspension magnetization roasting (SMR) under the action of biomass pyrolysis gas. These studies were conducted using X-ray diffraction, scanning electron microscopy, vibrating sample magnetometer, thermo-gravimetric and differential scanning calorimetry, brunauer-emmett-teller specific surface area, and gas chromatography. The results showed that, after the grinding-magnetic separation process, the iron recovery rate was 93.32 %; the iron grade of the iron concentrate was 61.50 %. The optimal process conditions were determined as follows: fast pyrolysis temperature of 600 °C, SMR temperature of 700 °C, biomass dosage of 10 %, and SMR time of 4-5 min. The formation of Fe3O4 from the surface to the interior of the particles during the reduction process, and formation of pores and cracks led to an increase in the specific surface area. The SMR temperature not only improved the heat and mass transfer effect in the reduction process but also generated more CO and H2 through the reverse reaction of methanation, which work together to increase the saturation magnetisation of the unit sample. This method can be used to efficiently recover high quality iron from refractory iron ores.
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Affiliation(s)
- Guoqiang Qiu
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Xunan Ning
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, PR China.
| | - Junhua Shen
- Shaoguan Pengrui Environmental Protection Technology Co., Ltd., Shaoguan 512625, PR China
| | - Yi Wang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Dingyuan Zhang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, PR China
| | - Jinhuan Deng
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, PR China
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4
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Minerals phase transformation by hydrogen reduction technology: A new approach to recycle iron from refractory limonite for reducing carbon emissions. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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An Y, Yu J, Hu N, Gao P, Li Y, Han Y. An efficient and clean utilization technique for red mud based on fluidized bed carbon monoxide reduction. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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An Y, Gao P, Yu J, Han Y. Reduction behavior of hematite ore with different particle sizes in suspension roaster. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103717] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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7
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Deng J, Ning XA, Shen J, Ou W, Chen J, Qiu G, Wang Y, He Y. Biomass waste as a clean reductant for iron recovery of iron tailings by magnetization roasting. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2022; 317:115435. [PMID: 35751253 DOI: 10.1016/j.jenvman.2022.115435] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 05/10/2022] [Accepted: 05/27/2022] [Indexed: 06/15/2023]
Abstract
The magnetization roasting with coal as primary reductants adds cost and causes environmental pollution. Therefore, it is of great importance to investigate the biomass application as a reductant for magnetization roasting to recover iron from low-utilization iron tailings for emission mitigation and green utilization. This study systematically investigated the impact of biomass (pyrolysis gas from agricultural and forestry waste) as a reductant on the conversion of iron tailings to magnetite in magnetization roasting. Additionally, the thermal decomposition of biomass, phase transformation and microstructure evolution of iron tailings were analyzed by TG, XRD, BET, and other methods to elucidate the conversion mechanism for facilitating magnetized hematite in iron tailings with biomass-derived gas. The results showed that woody biomass was a more appropriate reductant for magnetization roasting; 650 °C was the optimal temperature for the complete transformation of hematite to magnetite by reduction roasting with biomass waste. Through magnetic separation, the concentrate with an iron grade of 62.04% and iron recovery of 95.29% was obtained, and the saturation magnetization was enhanced from 0.60 emu/g to 58.03 emu/g of iron tailings. During the magnetization roasting, CO and H2 generated from biomass reduced the hematite in tailings particles from interior to exterior, forming a loose structure with rich microfissures, facilitating the subsequent separation operations. This study offers a novel reference for applying biomass to exploit hematite minerals and shows the potential of biomass for energy savings and emission reduction in the utilization of iron tailing resources.
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Affiliation(s)
- Jinhuan Deng
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Xun-An Ning
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
| | - Junhua Shen
- Shaoguan Pengrui Environmental Protection Technology Co., Ltd., Shaoguan, 512625, China
| | - Weixuan Ou
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Jiayi Chen
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Guoqiang Qiu
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yi Wang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
| | - Yao He
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China
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Yuan S, Ding H, Wang R, Zhang Q, Li Y, Gao P. The mechanism of suspension reduction on Fe enrichment with low-grade carbonate-containing iron ore. ADV POWDER TECHNOL 2022. [DOI: 10.1016/j.apt.2022.103643] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Yang Y, Shen H, Luo Y, Zhang R, Sun J, Liu X, Zong Z, Tang G. Rigid polyurethane foam composites based on iron tailing: Thermal stability, flame retardancy and fire toxicity. CELLULAR POLYMERS 2022. [DOI: 10.1177/02624893221105317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In order to explore the potential utilization value of iron tailings, the typical solid waste-iron tailings was introduced into rigid polyurethane foam (RPUF) as a flame retardant filler in this paper. The flame retardant performance, combustion performance, gas-phase products and char residue’s related properties of RPUF/ITS composites were systematically investigated by limiting oxygen index, thermogravimetric (TG), cone calorimetry (CCT) and thermogravimetric-infrared spectrometry (TG-FTIR). The results showed that ITS improved the overall thermal stability of the composites, and the T-5%, T-50%, Tmax1, Tmax2 and char residue rates were all higher than those of the pure samples. The CCT indicated that ITS had a certain effect on smoke suppression and heat release reduction. The peak heat release rate of RPUF-6 was reduced by 22.75% compared with that of the pure sample, and the total smoke release of RPUF-2 was reduced by 25.36%. Smoke factor (SF), fire growth rate index and fire performance index indicated that ITS reduced the fire risk of RPUF/ITS composites. TG-FTIR showed that ITS inhibited the decomposition of RPUF/ITS composites, and the release intensity of hydrocarbons, CO2, isocyanate compound, CO, aromatic compounds and esters decreased significantly. TG, MCC, scanning electron microscope and Raman implied that ITS promoted the formation of a dense char layer in RPUF and improved the heat resistance of the char layer.
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Affiliation(s)
- Yadong Yang
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma’anshan, China
| | - Haifeng Shen
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma’anshan, China
| | - Yuzhou Luo
- Business School, Guilin University of Technology, Guilin, China
| | - Renhui Zhang
- School of Materials Science and Engineering, East China Jiaotong University, Nanchang, China
| | - Junjie Sun
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma’anshan, China
| | - Xiuyu Liu
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma’anshan, China
| | - Zhifang Zong
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma’anshan, China
| | - Gang Tang
- School of Civil Engineering and Architecture, Anhui University of Technology, Ma’anshan, China
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10
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Extraction and phase transformation of iron in fine-grained complex hematite ore by suspension magnetizing roasting and magnetic separation. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-022-1116-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Wang H, Xu Z, Yang Y, Liu M, Yang S, Wang B, Deng D, Liu X, Tang G. Iron tailing/ammonium polyphosphate system in
RPUF
composites to enhancing fire safety: a novel strategy for utilization of metallurgical solid waste. POLYM INT 2022. [DOI: 10.1002/pi.6407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hao Wang
- Energy Conservation & Environmental Protection Research Institute, Huatian Engineering & Technology Corporation MCC, Ma'anshan Anhui 243005 China
| | - Zicheng Xu
- School of Architecture and Civil Engineering, Anhui University of Technology, 59 Hudong Road, Ma'anshan Anhui 243002 China
| | - Yadong Yang
- School of Architecture and Civil Engineering, Anhui University of Technology, 59 Hudong Road, Ma'anshan Anhui 243002 China
| | - Mengru Liu
- School of Architecture and Civil Engineering, Anhui University of Technology, 59 Hudong Road, Ma'anshan Anhui 243002 China
| | - Sujie Yang
- School of Architecture and Civil Engineering, Anhui University of Technology, 59 Hudong Road, Ma'anshan Anhui 243002 China
| | - Bibo Wang
- State Key Laboratory of Fire Science University of Science and Technology of China, 96 Jinzhai Road Hefei Anhui 230026 PR China
| | - Dan Deng
- Department of Polymer Science and Engineering Jiaxing University, Jiaxing 314001 Zhejiang China
| | - Xiuyu Liu
- School of Architecture and Civil Engineering, Anhui University of Technology, 59 Hudong Road, Ma'anshan Anhui 243002 China
| | - Gang Tang
- School of Architecture and Civil Engineering, Anhui University of Technology, 59 Hudong Road, Ma'anshan Anhui 243002 China
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12
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Clean Utilization of Limonite Ore by Suspension Magnetization Roasting Technology. MINERALS 2022. [DOI: 10.3390/min12020260] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
As a typical refractory iron ore, the utilization of limonite ore with conventional mineral processing methods has great limitations. In this study, suspension magnetization roasting technology was developed and utilized to recover limonite ore. The influences of roasting temperature, roasting time, and reducing gas concentration on the magnetization roasting process were investigated. The optimal roasting conditions were determined to be a roasting temperature of 480 ℃, a roasting time of 12.5 min, and a reducing gas concentration of 20%. Under optimal conditions, an iron concentrate grade of 60.12% and iron recovery of 91.96% was obtained. The phase transformation, magnetism variation, and microstructure evolution behavior were systematically analyzed by X-ray diffraction, vibrating sample magnetometer, and scanning electron microscope. The results indicated that hematite and goethite were eventually transformed into magnetite during the magnetization roasting process. Moreover, the magnetism of roasted products significantly improved due to the formation of ferrimagnetic magnetite in magnetization roasting. This study has implications for the utilization of limonite ore using suspension magnetization roasting technology.
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Producing magnetite concentrate via self-magnetization roasting in N2 atmosphere: Phase and structure transformation, and extraction kinetics. J IND ENG CHEM 2021. [DOI: 10.1016/j.jiec.2021.09.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Yang Y, Zhang G, Yu F, Liu M, Yang S, Tang G, Xu X, Wang B, Liu X. Flame retardant rigid polyurethane foam composites based on iron tailings and aluminum phosphate: A novel strategy for utilizing industrial solid wastes. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5474] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Yadong Yang
- School of Architecture and Civil Engineering Anhui University of Technology Ma'anshan China
| | - Guangyi Zhang
- School of Architecture and Civil Engineering Anhui University of Technology Ma'anshan China
| | - Feng Yu
- School of Architecture and Civil Engineering Anhui University of Technology Ma'anshan China
| | - Mengru Liu
- School of Architecture and Civil Engineering Anhui University of Technology Ma'anshan China
| | - Sujie Yang
- School of Architecture and Civil Engineering Anhui University of Technology Ma'anshan China
| | - Gang Tang
- School of Architecture and Civil Engineering Anhui University of Technology Ma'anshan China
- Key Laboratory of Metallurgical Emission Reduction & Resources Recycling Anhui University of Technology Ma'anshan China
| | - Xiangrong Xu
- School of Mechanical Engineering Anhui University of Technology Ma'anshan China
| | - Bibo Wang
- State Key Laboratory of Fire Science University of Science and Technology of China Hefei China
| | - Xiuyu Liu
- School of Architecture and Civil Engineering Anhui University of Technology Ma'anshan China
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