Article
Energy & Fuels
Yunpeng Wang, Fangguan Tan, Lei Gao, Xiaolei Zhou, Zhe Shi, Nan Li
Summary: This study investigated the potential use of spent pot-lining (SPL) as a supplementary fuel in blast furnaces (BFs) to replace coke or pulverized coal (PC). A numerical model was established to study the combustion behavior of mixed fuel (MF) containing 80 % PC and 20 % SPL in the raceway of BF. The results showed that the burnout rate is influenced by blast velocity, temperature, injection rate, and oxygen content.
Article
Energy & Fuels
Qi Wang, Enlu Wang
Summary: This study focuses on the application of carbon-neutral technology from biomass in ironmaking blast furnace production, using a 3D CFD model to describe the flow and thermochemical behavior of biochar in the furnace. Results show that cylindrical biochar particles have slower gas conversion rate and smaller burnout compared to spherical particles, and high carbonization temperature decreases biochar burnout. BC-773 presents potential to better replace PCI coals in blast furnace practice.
Article
Computer Science, Information Systems
Jiaocheng Ma, Xuewei Wen, Xin Zhao
Summary: Understanding the remaining thickness of blast furnace hearth refractory is crucial for extending the service life of a blast furnace. A multi-information fusion method was proposed to measure refractory lining thickness more accurately, improving measurement accuracy compared to traditional methods.
Article
Construction & Building Technology
Debo Zhao, Yutao Huang, Xiangsheng Chen, Kaihang Han, Cheng Chen, Xiaofeng Zhao, Weitao Chen
Summary: In this paper, the numerical simulation of a segmental lining tunnel subjected to internal explosive loading is carried out using the arbitrary-Lagrangian-Eulerian (ALE) and finite element (FE) coupled algorithms. A high-fidelity FE model is established considering the assembled features of the segmental lining structure, and the mapping technique is used for accurate simulation of the explosion process. The calculated overpressure histories and failure modes of the lining structure match well with field test results, demonstrating the applicability and accuracy of the numerical model. A more comprehensive numerical model is also built to investigate the influences of mechanical properties and pressure levels of surrounding soils on dynamic responses of the tunnel structure under internal explosion. The numerical results indicate that the dominant deformation modes of the segmental lining tunnel under internal explosion include opening deformation at the segmental joints and shear deformation between adjacent rings. A moderate explosion caused by terrorist bombing attacks can severely damage the shield tunnel structure, especially if it is buried in soft soil at a shallow depth.
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY
(2023)
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
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
Energy & Fuels
Haiqi Nie, Zhaoyang Li, Shibo Kuang, Lianggong Yan, Wenqi Zhong, Aibing Yu, Xiaoming Mao, Haifa Xu
Summary: Oxygen blast furnace ironmaking utilizes high oxygen enrichment in the blast to achieve "zero carbon footprint" production. The increase in oxygen enrichment initially leads to an increase in fuel or coke rate, impacting the flow and thermochemical behaviors and the cohesive zone height in the furnace. The analysis also shows the influence of blast temperature and top pressure on coke rate and productivity, with top pressure having a more significant effect at higher oxygen enrichments.
Article
Metallurgy & Metallurgical Engineering
Chengbo Zhang, Chenxi Zhao, Lei Shao, Henrik Saxen, Yingxia Qu, Zongshu Zou
Summary: A wear model based on the solution of an inverse heat conduction problem was developed to track the evolution of the internal geometry of a large-scale BF in Chinese steelworks, revealing that the skull layer at the bottom of the BF hearth is thicker, preventing excessive lining erosion in the sidewall, and correlating well with taphole length.
STEEL RESEARCH INTERNATIONAL
(2022)
Article
Energy & Fuels
Heng Zhou, Kai Wang, Jun Ni, Jianlong Wu, Pengfei Ji, Wang Zeng, Jinlian Li, Baojun Zhao, Mingyin Kou
Summary: The co-combustion of semicoke and coal is an effective method to reduce energy consumption and cost in ironmaking blast furnace operation. A three-dimensional model was established to study the combustion characteristics in the tuyere and raceway. The results showed that the oxygen enrichment ratio, injection amount, and particle size have significant effects on the high temperature zones and burnout rate.
Article
Engineering, Chemical
Lei Wang, Liangyu Chen, Yang Li, Jiaocheng Ma
Summary: The blast furnace hearth plays a critical role in the lifespan of a blast furnace. This paper establishes a 3D numerical model to predict and evaluate the effectiveness of furnace protection measures. By analyzing different protection measures, irreversible erosion of the hearth can be prevented.
Article
Environmental Sciences
Hui Wang, Tianying Wang, Liuchan Liu, Zhengwei Long, Pu Zhang
Summary: This paper investigates the air pollution issues in a blast furnace tapping workshop and identifies high soot concentrations and heavy pollution areas. Improper management of doors and windows leads to inefficient particulate matter discharge and accumulation, impacting the working environment and health of employees.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Ceramics
Jingwen Cui, Guohan Yu, Lixin Zhang, Suping Li, Junjie Deng, Enhui Wang, Enxia Xu, Xinmei Hou
Summary: The internal working conditions of a phenol acetone salt-containing waste vertical incinerator (PASWVI) during steady operation were investigated using Ansys Fluent. The suitable industrial operation condition was found to be a waste fluid injection rate of 8 m/s. The erosion rates of corundum-mullite brick and corundum-composite spinel brick for 1 hour were calculated to be 3.60 x 10-3 kg/m2 and 1.68 x 10-3 kg/m2, respectively. This study provides valuable references for optimizing the refractories used in PASWVI.
CERAMICS INTERNATIONAL
(2023)
Article
Energy & Fuels
Xiaobing Yu, Yansong Shen
Summary: Ironmaking blast furnace (BF) is an energy-intensive chemical process. This study investigates the dynamic behaviors of BF under different scenarios of blast temperature (BT) decrease using a transient-state BF model. The responses of different BF regions to the BT change are found to be different, with the regions near BF gas inlet responding more promptly and significantly. This research provides a cost-effective tool to study time-related behaviors in the BF domain when BT changes occur.
Article
Metallurgy & Metallurgical Engineering
Huiqing Tang, Zhu Liu, Zhancheng Guo
Summary: Partial replacement of coal and coke by biomass/biochar in blast furnace ironmaking can reduce CO2 emissions. Numerical investigations show that in blast furnace operation with biochar composite briquette (BCB) charging, iron-oxide in BCB is fully reduced, but the overall gasification degree of BCB biochar decreases with an increase in BCB charging ratio.
ISIJ INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Yang You, Zhuang Zheng, Rui Wang, Qingqing Hu, Yanhui Li, Zhixiong You
Summary: Research shows that injecting low-cost semi-coke is critical to reducing blast furnace production costs. By establishing a three-dimensional mathematical model, the combustion behavior of semi-coke can be simulated and the influence of semi-coke mass fraction on the combustion zone of blast furnace can be studied.
