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Siderite ore is a typical and widely available refractory iron ore. In consideration of the growing demand for iron ores and the increasing pressure to reduce emissions in the steel industry, a green‐technology‐based utilization of siderite ore as an electric arc furnace (EAF) burden by applying carburization roasting and magnetic separation processes is proposed. Under optimized conditions, an electric furnace burden (Fe3C) assaying 81.62% Fe and 6.48% C, with a corresponding iron recovery rate of 91.33% is prepared. Moreover, when compared with the traditional blast furnace (BF)‐basic oxygen furnace (BOF) long process, the CO2 and NOX reductions amount to 17.60% and 35.07%, respectively. Furthermore, the carburization behavior and separation mechanism are revealed using X‐ray powder diffraction, scanning electron microscopy, and optical microscopy. The results show that siderite can be carburized to Fe3C; however, the separation efficiency of iron carbide and gangue is very low. Furthermore, Na2SO4 is a necessary additive to enhance the separation efficiency as it improves the carburized efficiency, increases the iron‐carbide particle size, and improves the embedded relationship of gangue and iron carbide. The proposed technology is promising for the utilization of siderite ores in terms of product value and environmental friendliness.
Dong Chen; Hongwei Guo; Yanan Lv; Peng Li; Bingji Yan; Wei Zhao. Green Technology‐Based Utilization of Refractory Siderite Ores to Prepare Electric Arc Furnace Burden. steel research international 2021, 1 .
AMA StyleDong Chen, Hongwei Guo, Yanan Lv, Peng Li, Bingji Yan, Wei Zhao. Green Technology‐Based Utilization of Refractory Siderite Ores to Prepare Electric Arc Furnace Burden. steel research international. 2021; ():1.
Chicago/Turabian StyleDong Chen; Hongwei Guo; Yanan Lv; Peng Li; Bingji Yan; Wei Zhao. 2021. "Green Technology‐Based Utilization of Refractory Siderite Ores to Prepare Electric Arc Furnace Burden." steel research international , no. : 1.
The fabrication of well densified wollastonite with smooth appearance by direct sintering method is still a challenge due to the competitive behaviors between sintering and crystallization. In this study, the coarser glass frits with a size of 1–4 mm are subjected to heat treatment at different temperatures. An attempt of integrating differential thermal analyzer with a slag melting temperature characteristic tester was exploited to monitor the heat and geometry changes during the heating. The results showed that the addition of CaF2 can significantly promote the crystallization of wollastonite at 940 °C, while hindering the sintering ability. At higher temperature, the increase of CaF2 acts as flux and favors the formation of eutectics, leading to a decline in the precipitation amount of wollastonite. The predominated liquid sintering brought fast shrinkage. It was found out that high content of CaF2 narrows the dense sintering temperature range and results in uneven surfaces. In order to obtain wollastonite glass-ceramics with smooth appearance, the maximum content of CaF2 in sintering glass-ceramics should be limited to 2 wt.%.
Chuanhui Li; Peng Li; Jianliang Zhang; Fengjuan Pei; Xingchen Gong; Wei Zhao; Bingji Yan; Hongwei Guo. The Concurrent Sintering-Crystallization Behavior of Fluoride-Containing Wollastonite Glass-Ceramics. Materials 2021, 14, 681 .
AMA StyleChuanhui Li, Peng Li, Jianliang Zhang, Fengjuan Pei, Xingchen Gong, Wei Zhao, Bingji Yan, Hongwei Guo. The Concurrent Sintering-Crystallization Behavior of Fluoride-Containing Wollastonite Glass-Ceramics. Materials. 2021; 14 (3):681.
Chicago/Turabian StyleChuanhui Li; Peng Li; Jianliang Zhang; Fengjuan Pei; Xingchen Gong; Wei Zhao; Bingji Yan; Hongwei Guo. 2021. "The Concurrent Sintering-Crystallization Behavior of Fluoride-Containing Wollastonite Glass-Ceramics." Materials 14, no. 3: 681.
The carburization roasting treatment followed by the magnetic separation is an effective way to utilize low-grade siderite, in which the sodium sulfate additive plays an important role. In order to investigate the role of sodium sulfate additive, the present study fixes its particular attention on the function mechanism of sodium sulfate additive during the preheating treatment, carburization, and separation process. The results show that sodium sulfate additive can enhance the oxidation, reduction, and carburization reactions of siderite pellet, which dramatically increases the carburization rate and degree of siderite pellet. Besides, sodium sulfate additive can significantly improve the growth of iron carbide particle, transform the dense gangue into loose gangue, and produce the cracks inside pellet, which greatly promotes the separation of iron carbide and gangue. In the whole process, preheating treatment at high temperature is a necessary process to intensify and maintain the additive’s effects.
Dong Chen; Yanan Lv; Hongwei Guo; Peng Li; Bingji Yan. Function Mechanism of Sodium Sulfate Additive on Iron Carbide Preparation with Low-Grade Siderite. Metallurgical and Materials Transactions A 2021, 1 -11.
AMA StyleDong Chen, Yanan Lv, Hongwei Guo, Peng Li, Bingji Yan. Function Mechanism of Sodium Sulfate Additive on Iron Carbide Preparation with Low-Grade Siderite. Metallurgical and Materials Transactions A. 2021; ():1-11.
Chicago/Turabian StyleDong Chen; Yanan Lv; Hongwei Guo; Peng Li; Bingji Yan. 2021. "Function Mechanism of Sodium Sulfate Additive on Iron Carbide Preparation with Low-Grade Siderite." Metallurgical and Materials Transactions A , no. : 1-11.
High-efficiency leaching of valuable metals from nickeliferous laterite ore for preparation of functional materials is one of the most important high-value utilization pathways. In this paper, facile preparation of multi-metal spinel-type ferrites (MFe2O4) from saprolite laterite ore after pickling waste liquor leaching process was proposed. The effects of pickling waste liquor leaching parameters including acid concentration, leaching temperature and time, liquid–solid ratio and iron ion concentration on leaching efficiency for Fe, Ni, Mg, Mn and Co from saprolite laterite ore and the molar ratio (RFe/M) of iron ions to divalent metal ions such as Ni2+, Mn2+, Mg2+, etc. in the leach liquors were systematically investigated. After complete leaching, spinel-type ferrites were synthesized from leach liquors and the influence of RFe/M and pH value as well Zn ion doping on phase compositions, morphological structure and magnetic performance of as-synthesized samples were also characterized and analyzed. Under the optimized leaching conditions, the leaching efficiency of Ni, Co, Mn, Fe and Mg could reach 93.2%, 90.8%, 94.3%, 95.5% and 85.3%, respectively. With the concentration of iron ions in pickling waste liquors increasing from 60 to 160 g·L−1, the RFe/M value increases from 1.88 to 4.32. The pH values for synthesis of spinel-type ferrites with high purity from leach liquors with RFe/M of 1.85 and 2.04 are 8.0 and 11.0, respectively, and the saturation magnetization Ms values of as-synthesized ferrites increase gradually with the increasing of pH value. Zn ions in pickling waste liquors could be doped and fixed in spinel-type ferrites to improve Ms values of as-synthesized ferrites, and the Ms value could reach the highest as 58.6 emu·g−1 when Zn ions doping amount is 0.4. Value-added utilization of pickling waste liquor and saprolite laterite ore could be realized by the proposed process. This paper might provide theoretical and technical support for low-cost synthesis of spinel-type ferrites from polymetallic resources.
Jian-Ming Gao; Zongyuan Du; Shujia Ma; Fangqin Cheng; Peng Li. High-efficiency leaching of valuable metals from saprolite laterite ore using pickling waste liquor for synthesis of spinel-type ferrites MFe2O4 with excellent magnetic properties. Journal of Materials Research and Technology 2020, 10, 988 -1001.
AMA StyleJian-Ming Gao, Zongyuan Du, Shujia Ma, Fangqin Cheng, Peng Li. High-efficiency leaching of valuable metals from saprolite laterite ore using pickling waste liquor for synthesis of spinel-type ferrites MFe2O4 with excellent magnetic properties. Journal of Materials Research and Technology. 2020; 10 ():988-1001.
Chicago/Turabian StyleJian-Ming Gao; Zongyuan Du; Shujia Ma; Fangqin Cheng; Peng Li. 2020. "High-efficiency leaching of valuable metals from saprolite laterite ore using pickling waste liquor for synthesis of spinel-type ferrites MFe2O4 with excellent magnetic properties." Journal of Materials Research and Technology 10, no. : 988-1001.
The iron species in the lower valence state in steel slag are capable of thermochemical H2O splitting and producing hydrogen energy. The defining of the slag reactivity with varying particle size distributions was put forward. The results showed the hydrogen generation rate was primarily dependent on temperature and particle size. The kinetics analysis revealed a typical self-retardation reaction behavior for the fine slag, due to the clogging of macropores upon oxidation. In comparison, the reaction kinetics of the coarser slag were described well by three-dimension diffusion model and exhibited better resistance against the rate decline. The coarser slag had much more grain junctions and fewer fraction of RO phases distributed at the particle surface. Due to the lack of free surfaces, the volume expansion derived from the oxidation of RO phase would cause larger mismatch stresses at grain boundaries, and further trigger the cracks formation.
Peng Li; Yuxi Chen; Xiangyang Li; Bingji Yan; Dong Chen; Hongwei Guo. Hydrogen generation characteristics of steel slag-steam high temperature reaction in terms of particle size. International Journal of Hydrogen Energy 2020, 45, 17140 -17152.
AMA StylePeng Li, Yuxi Chen, Xiangyang Li, Bingji Yan, Dong Chen, Hongwei Guo. Hydrogen generation characteristics of steel slag-steam high temperature reaction in terms of particle size. International Journal of Hydrogen Energy. 2020; 45 (35):17140-17152.
Chicago/Turabian StylePeng Li; Yuxi Chen; Xiangyang Li; Bingji Yan; Dong Chen; Hongwei Guo. 2020. "Hydrogen generation characteristics of steel slag-steam high temperature reaction in terms of particle size." International Journal of Hydrogen Energy 45, no. 35: 17140-17152.
The effects of CaF2 (1–5 wt.%) on the glass structure, crystallisation behaviour, sinterability, microstructure, and properties of a CaO–MgO–Al2O3–SiO2 glass-ceramic system were investigated. The results show that the glass transition temperature, crystallisation peak temperature and the activation energy for crystallisation decreased with the addition of CaF2. The crystallisation of diopside was initiated at the particle boundaries and followed with progressive advancing towards the centre. The enhanced crystallisation for CaF2-containing samples was observed and is likely due to the depolymerisation of the glass structure. However, the enrichment of Ca–2F complexes resulted in fluorite phase precipitation at the crystallisation front of the diopside phase when the CaF2 addition exceeded 3 wt.%. The hindered viscous flow sintering from a lower crystallisation temperature led to a decline in the sintering shrinkage, the extent of which was proportional to the amount of added CaF2. Plastic deformation was observed along with the newly-formed amorphous phase as the sintering temperature approached the glass melting point, which benefits densification. The performance analysis reveals that the fabricated glass-ceramics with the proper addition of CaF2 exhibited significant improvements in its density and bending strength. Whereas, the Vickers hardness, water absorption and chemical resistance all decreased.
Fengjuan Pei; Guohui Zhu; Peng Li; Hongwei Guo; Ping Yang. Effects of CaF2 on the sintering and crystallisation of CaO–MgO–Al2O3–SiO2 glass-ceramics. Ceramics International 2020, 46, 17825 -17835.
AMA StyleFengjuan Pei, Guohui Zhu, Peng Li, Hongwei Guo, Ping Yang. Effects of CaF2 on the sintering and crystallisation of CaO–MgO–Al2O3–SiO2 glass-ceramics. Ceramics International. 2020; 46 (11):17825-17835.
Chicago/Turabian StyleFengjuan Pei; Guohui Zhu; Peng Li; Hongwei Guo; Ping Yang. 2020. "Effects of CaF2 on the sintering and crystallisation of CaO–MgO–Al2O3–SiO2 glass-ceramics." Ceramics International 46, no. 11: 17825-17835.
The improper disposal of oily sludge and converter steel slag can be of great environmental concerns, herein, we proposed an innovative methodology by coupling the catalytic thermochemical conversion of oily sludge with the high-temperature reduction of steel slag, where the gas energy and iron resources can be recovered simultaneously. It was found out that the gas yield, iron reduction efficiency, as well as the carbon conversion, were positively correlated with the temperature, the amount of steel slag added and slag particle fineness. With the addition of steel slag, the carbon conversion increased from 76.6 % to 90.1 %, and the iron reduction efficiency increased from 38.5 % to 70.6 %. The phase and microstructure characterizations revealed that the iron-bearing phases (RO phase, Ca2Fe2O5) in steel slag were reduced into metallic iron by pyrolytic gaseous intermediate products (600−800 °C) and solid char (800−1000 °C). The in-situ reduced iron particles in turn acted as an efficient catalyst for cracking/reforming reactions, resulting in remarkable fuel gases, i.e. H2, CO evolution. Hence, the reduction of steel slag and the catalytic cracking/reforming of oily sludge were both enhanced. Furthermore, the technical-economic analysis in terms of material and energy balances was performed. It revealed that the proposed process was favorable for energy recovery and high added material production.
Peng Li; Xuan Zhang; Jun Wang; Hongwei Guo; Yuxi Chen; Zhenbo Wang; Bingji Yan; Dong Chen. Process characteristics of catalytic thermochemical conversion of oily sludge with addition of steel slag towards energy and iron recovery. Journal of Environmental Chemical Engineering 2020, 8, 103911 .
AMA StylePeng Li, Xuan Zhang, Jun Wang, Hongwei Guo, Yuxi Chen, Zhenbo Wang, Bingji Yan, Dong Chen. Process characteristics of catalytic thermochemical conversion of oily sludge with addition of steel slag towards energy and iron recovery. Journal of Environmental Chemical Engineering. 2020; 8 (4):103911.
Chicago/Turabian StylePeng Li; Xuan Zhang; Jun Wang; Hongwei Guo; Yuxi Chen; Zhenbo Wang; Bingji Yan; Dong Chen. 2020. "Process characteristics of catalytic thermochemical conversion of oily sludge with addition of steel slag towards energy and iron recovery." Journal of Environmental Chemical Engineering 8, no. 4: 103911.
A total solution for the utilisation of BFS can be achieved and the resulting valuable products CaMgAl-LDHs and MCM-41 are promising sorbents for CO2 capture.
Haojie Jiang; Hongwei Guo; Peng Li; Yang Li; Bingji Yan. Preparation of CaMgAl-LDHs and mesoporous silica sorbents derived from blast furnace slag for CO2 capture. RSC Advances 2019, 9, 6054 -6063.
AMA StyleHaojie Jiang, Hongwei Guo, Peng Li, Yang Li, Bingji Yan. Preparation of CaMgAl-LDHs and mesoporous silica sorbents derived from blast furnace slag for CO2 capture. RSC Advances. 2019; 9 (11):6054-6063.
Chicago/Turabian StyleHaojie Jiang; Hongwei Guo; Peng Li; Yang Li; Bingji Yan. 2019. "Preparation of CaMgAl-LDHs and mesoporous silica sorbents derived from blast furnace slag for CO2 capture." RSC Advances 9, no. 11: 6054-6063.
This study illuminates the role of low amounts of magnesia (≤ 3 wt.%) on the crystallization behaviour of CaO-Al2O3-SiO2 glass-ceramics. Differential thermal analysis demonstrates that the peak temperature and activation energy for crystallization decrease with the addition of MgO. The crystallization pattern changes from one-dimensional crystallization to two-dimensional growth, as indicated by higher values of the Avrami parameter (n) with increasing MgO contents. Analyses of the Rietveld refinement of XRD data, FTIR, Raman spectra and scanning electron microscopy reveal that MgO causes a simple change in CaO-Al2O3-SiO2 glass-ceramics, which form an Mg-containing solid solution (Ca1-xMgxSiO3; 0 ≤ x ≤ 1) by replacement of some of the CaO with small amounts of MgO. When the MgO content increases to 1.8 wt.%, diopside is primarily formed at the interfaces of sintered glass frits, acting as nucleation sites for the inward growth of wollastonite. The density of glass-ceramics increases with magnesia addition. Their hardness is strongly influenced by the phase species present, and can be enhanced by the crystallization of diopside.
Fengjuan Pei; Hongwei Guo; Peng Li; Bingji Yan; Jia Li; Ping Yang; Guohui Zhu. Influence of low magnesia content on the CaO-Al2O3-SiO2 glass-ceramics: Its crystallization behaviour, microstructure and physical properties. Ceramics International 2018, 44, 20132 -20139.
AMA StyleFengjuan Pei, Hongwei Guo, Peng Li, Bingji Yan, Jia Li, Ping Yang, Guohui Zhu. Influence of low magnesia content on the CaO-Al2O3-SiO2 glass-ceramics: Its crystallization behaviour, microstructure and physical properties. Ceramics International. 2018; 44 (16):20132-20139.
Chicago/Turabian StyleFengjuan Pei; Hongwei Guo; Peng Li; Bingji Yan; Jia Li; Ping Yang; Guohui Zhu. 2018. "Influence of low magnesia content on the CaO-Al2O3-SiO2 glass-ceramics: Its crystallization behaviour, microstructure and physical properties." Ceramics International 44, no. 16: 20132-20139.
This study presents a process for recovering aluminum from aluminum dross (an industrial waste product) via an alkali roasting process and using it to synthesize mesoporous γ-alumina. The results show that the inherent chlorides in dross (KCl and NaCl) reduce Al extraction efficiency and should be removed first by water leaching. Use of salt-free dross increases the Al extraction rate (from 85 to 96 pct) within 90 minutes alkali roasting at 923 K (650 °C). In addition, an ammonium bicarbonate byproduct can be obtained from water leaching due to the hydrolysis of AlN, which can be used as a precipitating agent in the boehmite sol preparation. Synthesis of mesoporous γ-alumina was carried out by the sol-gel method with EO20PO70EO20 (P123) as a template. The prepared mesoporous γ-alumina was characterized as having a disordered mesostructure with a high pore volume of 1.02 cm3/g and surface area of 312 m2/g. Thus, we achieved highly efficient utilization of aluminum dross and yielded products with high added value. Mesoporous γ-alumina has potential applications in environmental remediation and catalysis.
Hongwei Guo; Jun Wang; Xiuxia Zhang; Feng Zheng; Peng Li. Study on the Extraction of Aluminum From Aluminum Dross Using Alkali Roasting and Subsequent Synthesis of Mesoporous γ-Alumina. Metallurgical and Materials Transactions A 2018, 49, 2906 -2916.
AMA StyleHongwei Guo, Jun Wang, Xiuxia Zhang, Feng Zheng, Peng Li. Study on the Extraction of Aluminum From Aluminum Dross Using Alkali Roasting and Subsequent Synthesis of Mesoporous γ-Alumina. Metallurgical and Materials Transactions A. 2018; 49 (5):2906-2916.
Chicago/Turabian StyleHongwei Guo; Jun Wang; Xiuxia Zhang; Feng Zheng; Peng Li. 2018. "Study on the Extraction of Aluminum From Aluminum Dross Using Alkali Roasting and Subsequent Synthesis of Mesoporous γ-Alumina." Metallurgical and Materials Transactions A 49, no. 5: 2906-2916.
The feasibility of the preparation of diopside-fluorapatite based glass-ceramics from blast furnace slag and fluorite tailings was investigated. The results showed that the crystallization of parent glass was strongly dependent on its initial composition of raw materials. With low content of fluorite tailings, the only crystallization product was fluorapatite (Ca5(PO4)3F). Further increase of fluorite tailings will bring the enhancement of crystallization, resulting in the formation of diopside phase (Ca(Mg,Al)(Si,Al)2O6). The diopside-fluorapatite based glass-ceramics with Vickers hardness of 7.36 GPa could be obtained from raw materials with a composition of 40 mass% blast furnace slag and 60 mass% fluorite tailings.
Jianxiao Chen; Bingji Yan; Hongwei Li; Peng Li; Hongwei Guo. Vitrification of blast furnace slag and fluorite tailings for giving diopside-fluorapatite glass-ceramics. Materials Letters 2018, 218, 309 -312.
AMA StyleJianxiao Chen, Bingji Yan, Hongwei Li, Peng Li, Hongwei Guo. Vitrification of blast furnace slag and fluorite tailings for giving diopside-fluorapatite glass-ceramics. Materials Letters. 2018; 218 ():309-312.
Chicago/Turabian StyleJianxiao Chen; Bingji Yan; Hongwei Li; Peng Li; Hongwei Guo. 2018. "Vitrification of blast furnace slag and fluorite tailings for giving diopside-fluorapatite glass-ceramics." Materials Letters 218, no. : 309-312.
In this paper, high value added NaA zeolite material was prepared from blast furnace (BF) slag by hydrothermal method and its adsorption behavior on the removal of ammonium ion was investigated. It was found out that the synthetic NaA cubic zeolite with smaller crystal size obtained at nSiO2/nAl2O3 = 2 and nH2O/nNaOH = 20 showed better adsorption performance. The kinetics of the adsorption of ammonium ion by synthesized NaA zeolite was fitted by the pseudo-second-order kinetic model. The intra-particle diffusion modeling reveals that two mixed rate-controlling mechanisms were involved in the adsorption process. The relatively high value of activation energy of 92.3 kJ·mol−1 indicates a high impact of temperature on the adsorption rate, and the nature of ammonium adsorption is chemical reaction rather than physisorption. Based on the thermodynamics calculations, the adsorption of ammonium was found to be an endothermic, spontaneous process. The adsorption isothermal analysis showed that the Langmuir model could be well fitted and a maximum adsorption capacity of 83.3 mg·g−1 of NH4+ was obtained. Thus, it was demonstrated that by forming low cost NaA zeolite and using it for environmental remediation, the synchronous minimization of BF slag and ammonia nitrogen contamination could be achieved.
Hongwei Guo; Lizhen Tang; Bingji Yan; Kang Wan; Peng Li. NaA zeolite derived from blast furnace slag: its application for ammonium removal. Water Science and Technology 2017, 76, 1140 -1149.
AMA StyleHongwei Guo, Lizhen Tang, Bingji Yan, Kang Wan, Peng Li. NaA zeolite derived from blast furnace slag: its application for ammonium removal. Water Science and Technology. 2017; 76 (5):1140-1149.
Chicago/Turabian StyleHongwei Guo; Lizhen Tang; Bingji Yan; Kang Wan; Peng Li. 2017. "NaA zeolite derived from blast furnace slag: its application for ammonium removal." Water Science and Technology 76, no. 5: 1140-1149.