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Dr. Wenlong ZHAN
School of Materials and Metallurgy, University of Science and Technology Liaoning

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0 Iron Ore
0 Interfacial reaction
0 ironmaking
0 steelmaking
0 Slag

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Correction
Published: 30 June 2021 in Journal of Iron and Steel Research International
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ACS Style

Peng Han; Wen-Long Zhan; Hao-Bin Zhu; Lei Gao; Ying-Chang Yu; Zhi-Jun He; Jun-Hong Zhang; Qing-Hai Pang. Correction to: Thermal analysis and kinetic modeling of pulverized coal combustion accompanied with coke breeze. Journal of Iron and Steel Research International 2021, 28, 1074 -1074.

AMA Style

Peng Han, Wen-Long Zhan, Hao-Bin Zhu, Lei Gao, Ying-Chang Yu, Zhi-Jun He, Jun-Hong Zhang, Qing-Hai Pang. Correction to: Thermal analysis and kinetic modeling of pulverized coal combustion accompanied with coke breeze. Journal of Iron and Steel Research International. 2021; 28 (8):1074-1074.

Chicago/Turabian Style

Peng Han; Wen-Long Zhan; Hao-Bin Zhu; Lei Gao; Ying-Chang Yu; Zhi-Jun He; Jun-Hong Zhang; Qing-Hai Pang. 2021. "Correction to: Thermal analysis and kinetic modeling of pulverized coal combustion accompanied with coke breeze." Journal of Iron and Steel Research International 28, no. 8: 1074-1074.

Original paper
Published: 13 April 2021 in Journal of Iron and Steel Research International
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Pulverized coal injection technique has been widely used as a means of reducing coke consumption during ironmaking process. Owing to the increasing shortage of fossil fuels, other substitutes such as biomass, plastic, and waste tires have been studied in recent years. Coke breeze as one of the by-products of coking industries has been investigated as a substitute for partial pulverized coals. The combustion characteristics of blended fuels were estimated based on the flammability index C and the combustion characteristic index S. For different coke breeze additions, the combustion was divided into two stages, and the apparent kinetic parameters of the two stages were estimated by fitting the experimental data to the shrinkage reaction model and shrinkage diffusion model, respectively. Results showed that with the increase in coke breeze addition from 15% to 60%, the indexes C and S decrease, and the activation energy of the first stage remains almost constant, while that of the last stage increases from 16.89 up to 67.18 kJ mol−1, which indicates that adding coke breeze decreases the combustion efficiency of pulverized coal. Comparing the combustion and kinetic parameters under different coke breeze addition conditions, the optimal addition amount is suggested to be within 15%.

ACS Style

Peng Han; Wen-Long Zhan; Hao-Bin Zhu; Lei Gao; Ying-Chang Yu; Zhi-Jun He; Jun-Hong Zhang; Qing-Hai Pang. Thermal analysis and kinetic modeling of pulverized coal combustion accompanied with coke breeze. Journal of Iron and Steel Research International 2021, 28, 809 -817.

AMA Style

Peng Han, Wen-Long Zhan, Hao-Bin Zhu, Lei Gao, Ying-Chang Yu, Zhi-Jun He, Jun-Hong Zhang, Qing-Hai Pang. Thermal analysis and kinetic modeling of pulverized coal combustion accompanied with coke breeze. Journal of Iron and Steel Research International. 2021; 28 (7):809-817.

Chicago/Turabian Style

Peng Han; Wen-Long Zhan; Hao-Bin Zhu; Lei Gao; Ying-Chang Yu; Zhi-Jun He; Jun-Hong Zhang; Qing-Hai Pang. 2021. "Thermal analysis and kinetic modeling of pulverized coal combustion accompanied with coke breeze." Journal of Iron and Steel Research International 28, no. 7: 809-817.

Journal article
Published: 17 September 2020 in Metals
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At present, cost reduction and environmental protection are the mainstream of blast furnace (BF) development and the high lump ore ratio is an effective means. Therefore, it is significant to explore the relationship and mechanism of burden soft-melt dropping and its primary-slag formation behaviors under increasing lump ore ratio. In this paper, the melt–drop test is carried out on the single ore and mixed burden, and obtained primary-slag properties are subjected to analysis. The experimental results show that the primary-slag of lump ore contains a large amount of FeO and SiO2, so it simply produces many low melting point compounds, which cause terrible soft-melt dropping properties and primary-slag formation behaviors. Notably, mixing with sinter and pellet can effectively improve both the properties. With the increase in lump ore ratio, the CaO in the primary-slag decreases, FeO and SiO2 increase, resulting in the melting temperature of the primary-slag sequentially decreasing and the cohesive zone moves to the low temperature zone. In addition, the maximum pressure difference increases, and the gas permeability deteriorates. Increasing the sinter ratio can overcome the defect of high lump ore ratio that can effectively improve the poor softening performance, melting performance and the position and thickness of the cohesive zone. However, because of the pulverization performance, the maximum pressure difference and gas permeability of the burden become worse.

ACS Style

Yun-Fei Li; Zhi-Jun He; Wen-Long Zhan; Wei-Guo Kong; Peng Han; Jun-Hong Zhang; Qing-Hai Pang. Relationship and Mechanism Analysis of Soft-Melt Dropping Properties and Primary-Slag Formation Behaviors of the Mixed Burden in Increasing Lump Ore Ratio. Metals 2020, 10, 1254 .

AMA Style

Yun-Fei Li, Zhi-Jun He, Wen-Long Zhan, Wei-Guo Kong, Peng Han, Jun-Hong Zhang, Qing-Hai Pang. Relationship and Mechanism Analysis of Soft-Melt Dropping Properties and Primary-Slag Formation Behaviors of the Mixed Burden in Increasing Lump Ore Ratio. Metals. 2020; 10 (9):1254.

Chicago/Turabian Style

Yun-Fei Li; Zhi-Jun He; Wen-Long Zhan; Wei-Guo Kong; Peng Han; Jun-Hong Zhang; Qing-Hai Pang. 2020. "Relationship and Mechanism Analysis of Soft-Melt Dropping Properties and Primary-Slag Formation Behaviors of the Mixed Burden in Increasing Lump Ore Ratio." Metals 10, no. 9: 1254.

Article
Published: 15 June 2020 in International Journal of Minerals, Metallurgy and Materials
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Pore structure is an important factor influencing coke strength, while the property of coke is essential to maintaining gas and liquid permeability in a blast furnace. Therefore, an in-depth understanding of the pore structure evolution during the graphitization process can reveal the coke size degradation behavior during its descent in a blast furnace. Coke graphitization was simulated at different heating temperatures from 1100 to 1600°C at intervals of 100°C. The quantitative evaluation of the coke pore structure with different graphitization degree was determined by vacuum drainage method and nitrogen adsorption method. Results show that the adsorption and desorption curves of graphitized coke have intersection points, and the two curves did not coincide, instead forming a “hysteresis loop.” Based on the hysteresis loop analysis, the porous structure of the graphitized coke mostly appeared in the shape of a “hair follicle.” Furthermore, with an increase in heating temperature, the apparent porosity, specific surface area, total pore volume, and amount of micropores showed good correlation and can divided into three stages: 1100–1200, 1200–1400, and 1400–1600°C. When the temperature was less than 1400°C, ash migration from the inner part mainly led to changes in the coke pore structure. When the temperature was greater than 1400°C, the pore structure evolution was mainly affected by the coke graphitization degree. The results of scanning electron microscopy, energy dispersive spectrometry, and ash content analyses also confirmed that the migration of the internal ash to the surface of the matrix during the graphitization process up to 1400°C contributed to these changes.

ACS Style

Hao-Bin Zhu; Wen-Long Zhan; Zhi-Jun He; Ying-Chang Yu; Qing-Hai Pang; Jun-Hong Zhang. Pore structure evolution during the coke graphitization process in a blast furnace. International Journal of Minerals, Metallurgy and Materials 2020, 27, 1226 -1233.

AMA Style

Hao-Bin Zhu, Wen-Long Zhan, Zhi-Jun He, Ying-Chang Yu, Qing-Hai Pang, Jun-Hong Zhang. Pore structure evolution during the coke graphitization process in a blast furnace. International Journal of Minerals, Metallurgy and Materials. 2020; 27 (9):1226-1233.

Chicago/Turabian Style

Hao-Bin Zhu; Wen-Long Zhan; Zhi-Jun He; Ying-Chang Yu; Qing-Hai Pang; Jun-Hong Zhang. 2020. "Pore structure evolution during the coke graphitization process in a blast furnace." International Journal of Minerals, Metallurgy and Materials 27, no. 9: 1226-1233.

Journal article
Published: 01 March 2020 in Fuel Processing Technology
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The dissolution of carbon from coke into molten iron is a critical factor influencing melting efficiency and lining erosion of blast furnaces. To gain an in-depth understanding of this process, the wetting and spreading behaviors of molten iron in contact with a graphite substrate were studied using high-temperature vacuum wettability test equipment and a microstructural analysis method. The results show that the initial contact angles of molten iron on a graphite substrate (105.8°, 116.7°, 122.0°) and the equilibrium contact angles (60.6°, 65.4°, 70.7°) increase with increasing initial carbon content (Fe-3.8%C, Fe-4.3%C, Fe-4.8%C), showing a certain dependence on the carbon content in the molten iron. The initial stage of interaction between the molten iron and graphite substrate is a non-wetting state, which transitions to a wetting state during the spreading stage at high temperatures. A spherical cap structure is formed because of interfacial effects. The results show that the penetration of carbon into the molten iron decreases with increasing initial carbon content. Finally, the wetting and spreading mechanisms are illustrated on the basis of interfacial energy analysis. It is mainly controlled by dissolution in the initial stage of wetting and spreading, then transfers to reaction-driven control.

ACS Style

Hao-Bin Zhu; Wen-Long Zhan; Ying-Chang Yu; Zhi-Jun He; Qing-Hai Pang; Jun-Hong Zhang. Wetting and spreading behavior of molten iron in contact with graphite substrate: Interfacial effects. Fuel Processing Technology 2020, 203, 106389 .

AMA Style

Hao-Bin Zhu, Wen-Long Zhan, Ying-Chang Yu, Zhi-Jun He, Qing-Hai Pang, Jun-Hong Zhang. Wetting and spreading behavior of molten iron in contact with graphite substrate: Interfacial effects. Fuel Processing Technology. 2020; 203 ():106389.

Chicago/Turabian Style

Hao-Bin Zhu; Wen-Long Zhan; Ying-Chang Yu; Zhi-Jun He; Qing-Hai Pang; Jun-Hong Zhang. 2020. "Wetting and spreading behavior of molten iron in contact with graphite substrate: Interfacial effects." Fuel Processing Technology 203, no. : 106389.

Book chapter
Published: 09 February 2017 in Proceedings of the International Conference on Martensitic Transformations: Chicago
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Alkali metal is one of the key critical factors that determine the coke degradation . Previous studies on the influence of alkali metal on coke structure were mostly focus on the catalysis of alkali carbonates for coke gasification reaction. Besides, the difference of alkali metal and coke gasification effects on coke degradation was still not clear. Highly reactive coke developed by Nippon Steel was proved to increase the reaction efficiency and to decrease CO2 emission effectively. Therefore, conventional coke and highly reactive coke adsorbed 5% sodium were studied in this paper. Coke degradation tests were undertaken in atmosphere of N2 and CO2 . SEM, EDS and XRD were employed to analyze samples. Results showed that the degradation of conventional coke strength by sodium was stronger than highly reactive coke in the atmosphere of N2. The effect of CaO catalyst on the coke reactivity has been interpreted as a change in highly reactive coke microstructure and strength.

ACS Style

Zhijun He; Wenlong Zhan; Junhong Zhang; Qinghai Pang; Sen Zhang; Chen Tian. Influence of Sodium on Coke Microstructure in Different Reaction Atmosphere. Proceedings of the International Conference on Martensitic Transformations: Chicago 2017, 161 -169.

AMA Style

Zhijun He, Wenlong Zhan, Junhong Zhang, Qinghai Pang, Sen Zhang, Chen Tian. Influence of Sodium on Coke Microstructure in Different Reaction Atmosphere. Proceedings of the International Conference on Martensitic Transformations: Chicago. 2017; ():161-169.

Chicago/Turabian Style

Zhijun He; Wenlong Zhan; Junhong Zhang; Qinghai Pang; Sen Zhang; Chen Tian. 2017. "Influence of Sodium on Coke Microstructure in Different Reaction Atmosphere." Proceedings of the International Conference on Martensitic Transformations: Chicago , no. : 161-169.

Journal article
Published: 01 December 2015 in Journal of Iron and Steel Research International
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Fuel consumption in the COREX-3000 process run in Baosteel is currently higher than the design index. Therefore, mass and heat balance equations for the COREX process were established using the basic principles included in the Rist operating diagram for blast furnace (BF) as a reference. Thermodynamic calculations were then used to modify the Rist operating diagram so that it was suitable for the COREX process. The modified Rist operating diagram was then applied for the evaluation of metallization rate (MR) and fuel structure to reduce the energy consumption in the COREX process. The modified Rist operating diagram for the shaft furnace (SF) provided a nearly ideal value for the restriction point W when the metallization rate was increased, while the point P on the operating line for the melter gasifier (MG) moved upward due to reduction in the heat required in hearth. The feasibility of reducing the energy consumption during the COREX process by changing the fuel structure was also demonstrated.

ACS Style

Wen-Long Zhan; Keng Wu; Zhi-Jun He; Qi-Hang Liu; Xiao-Juan Wu. Estimation of Energy Consumption in COREX Process Using a Modified Rist Operating Diagram. Journal of Iron and Steel Research International 2015, 22, 1078 -1084.

AMA Style

Wen-Long Zhan, Keng Wu, Zhi-Jun He, Qi-Hang Liu, Xiao-Juan Wu. Estimation of Energy Consumption in COREX Process Using a Modified Rist Operating Diagram. Journal of Iron and Steel Research International. 2015; 22 (12):1078-1084.

Chicago/Turabian Style

Wen-Long Zhan; Keng Wu; Zhi-Jun He; Qi-Hang Liu; Xiao-Juan Wu. 2015. "Estimation of Energy Consumption in COREX Process Using a Modified Rist Operating Diagram." Journal of Iron and Steel Research International 22, no. 12: 1078-1084.