Article
Chemistry, Physical
Zhaoyang Li, Zheng Qi, Zhongxue Wang, Lechen Zhang, Dong Liang, Qiang Dong
Summary: A continuum-based BF process model was developed to study the injection of COG into a commercial scale BF, showing that an increased COG injection rate leads to improved BF performance while decreasing the utilization efficiency of COG.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Materials Science, Multidisciplinary
Jing Li, Shibo Kuang, Ruiping Zou, Aibing Yu
Summary: This paper numerically studies the effects of shaft gas injection technology on blast furnace performance. The results show that increasing the gas flow rate enhances the gas penetration and indirect reduction rate, but also increases the bed pressure. The penetration zone size of the shaft-injected gas is influenced by the number of shaft tuyeres and horizontal cavity depth, but their effects on blast furnace performance are limited compared to the gas flow rate.
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
(2023)
Article
Energy & Fuels
Ehsan Farajzadeh, Yuting Zhuo, Yansong Shen
Summary: This study investigates the dynamic impact of injecting coke oven gas (COG) and reformed COG on the raceway's size and shape in ironmaking blast furnaces. The results show that injecting COG leads to a larger raceway size and higher gas temperature and CO and CO2 concentrations compared to reformed COG.
Article
Green & Sustainable Science & Technology
Yi-Peng Xu, Run-Hao Liu, Meng-Zhuo Shen, Zheng-Ang Lv, Supat Chupradit, Ahmed Sayed M. Metwally, Mika Sillanpaa, Qian Qian
Summary: This study aims to develop an economically viable novel process for the co-generation of methanol and electricity from coke oven gas and blast furnace gas. Two processes are proposed and evaluated based on energy efficiency, exergy efficiency, net CO2 emission, and total production cost. The results show that the process utilizing additional hydrogen is more feasible in terms of energy efficiency, production cost, and environmental impact.
SUSTAINABLE PRODUCTION AND CONSUMPTION
(2022)
Article
Energy & Fuels
Ziguang Zhao, Xiaobing Yu, Yuntao Li, Jinming Zhu, Yansong Shen
Summary: In this study, a multi-fluid industrial-scale BF model is used to investigate the effects of hydrogen co-injection on the internal state and performance of a blast furnace. It is found that co-injecting hydrogen through the tuyere and shaft can improve the utilization efficiency of hydrogen and the overall temperature field of the furnace. The study also explores the possible strategies for hydrogen-rich operation of blast furnaces.
Article
Energy & Fuels
Lingling Liu, Shibo Kuang, Baoyu Guo, Aibing Yu
Summary: Oxygen blast furnace (OBF) is a low carbon ironmaking technology that suffers from high gas flame temperature. Injecting COREX off-gas (CROG) into the industrial BF can improve coal combustion and overall performance. The optimum injection rate of CROG helps achieve better fuel economy by enhancing indirect reduction and coke combustion.
Article
Energy & Fuels
Yuting Zhuo, Yansong Shen
Summary: A three-dimensional transient CFD model was developed to investigate the effects of key blast conditions on in-furnace phenomena in an industrial scale BF. The simulation results showed that higher blast rate and oxygen enrichment improved the combustion of coal and coke, leading to higher coal burnout rate and more reducing gas production.
Article
Thermodynamics
Kai Wang, Jianliang Zhang, Heng Zhou, Jun Ni, Yifan Hu, Jian Huang, Shuo Li, Xiaodong Ma, Shengli Wu, Mingyin Kou
Summary: Natural gas injection into blast furnace is considered as an efficient and promising method to reduce carbon emissions in the iron and steel industry. A three-dimensional model considering the co-injection of natural gas and pulverized coal was established to study the co-injection behaviors. The effects of natural gas injection volume and different thermal compensation measures on the coal burnout rate were investigated. Results showed that the average temperature in the raceway and the coal burnout rate decreased after the injection of natural gas into the blast furnace. It is suggested to decrease the coal rate and increase the oxygen enrichment ratio for better coal burnout rate in blast furnace with natural gas and pulverized coal co-injection.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Chemical
Mingyin Kou, Wang Zeng, Zhong Zhang, Xuefeng She, Tianxiang Zhang, Baojun Zhao, Xiaodong Ma, Heng Zhou
Summary: In this study, a three-dimensional model considering different burden sizes was established using the discrete element method (DEM). The effects of central coke charging angle, central coke charging amount, and coke layer profile on the coke collapse behavior and the ore-to-coke ratio were investigated.
Article
Metallurgy & Metallurgical Engineering
Anne M. Heikkila, Aki M. Koskela, Mikko O. Iljana, Rongshan Lin, Hauke Bartusch, Eetu-Pekka Heikkinen, Timo M. J. Fabritius
Summary: This study investigates the impact of BF atmosphere composition on coke gasification, finding that coke gasification is faster in wall atmosphere conditions, and the introduction of H2 and H2O can accelerate coke gasification.
STEEL RESEARCH INTERNATIONAL
(2021)
Article
Chemistry, Applied
Sai Meng, Kexin Jiao, Jianliang Zhang, Yanbing Zong, Lei Zhang, Hengbao Ma, Ziyu Guo
Summary: This study systematically examined the macroscopic morphology, size distribution, and voidage variation of deadman coke in a commercial blast furnace through dissection and image processing methods. The research findings provide important references for high efficiency and low carbon smelting in blast furnace operation.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Chemical
Heng Zhou, Jianlong Wu, Zhibin Hong, Li Pang Wang, Shengli Wu, Mingyin Kou, Guangwei Wang, Yiwa Luo
Summary: The study investigates factors affecting coke collapse in blast furnaces, including reverse charging, coke platform width, central coke charging, and pellet ratio. Reverse charging and central coke charging can reduce coke collapse, while a recommended platform width larger than 2 meters and a pellet ratio no larger than 40% can improve the ore-to-coke ratio distribution.
Article
Chemistry, Applied
Sai Meng, Kexin Jiao, Jianliang Zhang, Cui Wang, Lei Zhang, Ziyu Guo, Zhixin Xiao
Summary: In this study, the distribution characteristics of coke in a 2200m3 blast furnace were analyzed and the utilization ratio of coke in the hearth was determined. Factors that affect coke utilization, such as the presence of CaS and S, K elements, and the influence of ore phase and alkali metal salt, were also discovered.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Multidisciplinary Sciences
A. A. Adeleke, J. K. Odusote, P. P. Ikubanni, A. S. Olabisi, P. Nzerem
Summary: This study focuses on the physicomechanical durability and energy content of briquettes made from subbituminous coal and torrefied biomass using bentonite as a binder. The density of the briquettes increased with an increase in bentonite content, while the water resistance decreased. The briquettes made with 2% bentonite content exhibited better physicomechanical durability with equivalent energy content.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Chemical
Dan Xu, Shuai Wang, Yansong Shen
Summary: This paper investigates the fundamentals of iron ore reduction and coke gasification in the shaft region of an ironmaking blast furnace using a coarse-grained reacting CFD-DEM model, which can capture typical thermochemical behaviors at particle scale and study the effect of key operating parameters quantitatively.