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
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
Cuiliu Zhang, Listopadov Vladislav, Runsheng Xu, Grachev Sergey, Kexin Jiao, Jianliang Zhang, Tao Li, Ternovykh Aleksei, Chuan Wang, Guangwei Wang
Summary: Natural gas can replace part of the pulverized coal in blast furnace injection, and numerical simulation is used to compare and analyze the differences between mixed injection of natural gas and pulverized coal and single injection of coal. The results show that natural gas injection increases the temperature near the tuyere wall but decreases the average temperature in the raceway. The injection parameters have an effect on the combustion performance of pulverized coal, with increasing natural gas lance diameter resulting in decreased burnout of pulverized coal. The change in natural gas lance position has a relatively small effect, and increasing natural gas injection rate reduces the burnout of pulverized coal and CO2 emissions.
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
Green & Sustainable Science & Technology
Shuixin Ye, Zhengya Xie, Yi Wang, Wenhe Wu, Ruidong Wang, Yuwen Zhang, Xionggang Lu
Summary: In the pursuit of curbing carbon emissions, this study explored the potential of hydrogen as a substitute for coke in the blast furnace smelting process. It proposed a novel approach for preheating hydrogen and assessed carbon emissions rigorously. The findings highlight the significant carbon reduction potential of hydrogen, but also underscore the complexity of optimizing its implementation in the smelting process.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Engineering, Chemical
Samuel Nielson, Tyamo Okosun, Bradley Damstedt, Megha Jampani, Chenn Q. Zhou
Summary: With a push towards high injection rate blast furnace operation, researchers at Purdue University explored the impact of replacing natural gas with syngas. Simulation results show that syngas injection can reduce coke consumption in the blast furnace, with potential for higher flame temperatures and improved coke rates compared to natural gas injection.
Article
Metallurgy & Metallurgical Engineering
Juanjuan Jiang, Kai Dong, Rong Zhu, Runzao Liu
Summary: This study uses metallurgical thermodynamics as the basis to construct mathematical models of a blast furnace and a hot blast stove, and analyzes the emission of CO2 injection into the blast furnace. The results show that as the CO2 enrichment rate increases, the input of CO2 emission increases while the output decreases.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2022)
Article
Green & Sustainable Science & Technology
Elsayed Mousa, Kurt Sjoblom
Summary: In this study, the potential of biochar in replacing pulverized coal injection (PCI) in blast furnaces was evaluated using the MASMOD model. By optimizing the moisture content of biochar and the oxygen enrichment in the blast, it is possible to achieve 100% replacement of pulverized coal without affecting the adiabatic flame temperature and top gas temperature.
Article
Thermodynamics
Lian Ye, Jianliang Zhang, Guangwei Wang, Chen Wang, Xiaoming Mao, Xiaojun Ning, Nan Zhang, Haipeng Teng, Jinhua Li, Chuan Wang
Summary: Hydrothermal carbonization (HTC) technology can upgrade combustible waste to high-quality fuel called hydrochar. The study thoroughly analyzed the physical, chemical, and metallurgical properties of hydrochar and found that it has improved properties compared to waste feedstocks. The HTC process can also effectively remove harmful elements from feedstocks, reducing their negative effects in blast furnaces.
Article
Green & Sustainable Science & Technology
Adriano Souza Leao, Diego Lima Medeiros, Marcelo Andrade Santiago, Arilma Oliveira do Carmo Tavares, Henrique Leonardo Maranduba, Edna dos Santos Almeida
Summary: This study assessed the environmental and energy performance of producing 1.0 ton of pig iron through a life cycle assessment. The results showed that by improving material blending and maximizing co-product utilization, significant improvements can be made to the environmental performance of pig iron, making it competitive in the global market.
SUSTAINABLE MATERIALS AND TECHNOLOGIES
(2023)
Article
Green & Sustainable Science & Technology
Dong Sha, Fang Wang, Baomin Wang, Baofeng Pan
Summary: This study focused on enhancing the mechanical properties of coal-based synthetic natural gas slag geopolymer by incorporating ground granulated blast furnace slag. The effects of different factors on the compressive strength of the geopolymer were analyzed, and the microstructural characteristics and composition of reaction products were investigated. The results showed that the mechanical properties of the geopolymer were highly dependent on the content of ground granulated blast furnace slag. Furthermore, the XRD, SEM, FT-IR, and TG tests provided valuable insights into the compositional evolution and microstructure of the reaction products.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Metallurgy & Metallurgical Engineering
Heng Zhou, Xu Tian, Shun Yao, Mingyin Kou, Shengli Wu, Yansong Shen
Summary: The study focused on the impact of Blast furnace (BF) injection of COREX export gas after removal of CO2 (CEG) on the operation of the BF, as well as the acceptable injection volume of CEG under different thermal compensation measures.
ISIJ INTERNATIONAL
(2021)
Article
Energy & Fuels
Lian Ye, Jianliang Zhang, Runsheng Xu, Xiaojun Ning, Nan Zhang, Chen Wang, Xiaoming Mao, Jinhua Li, Guangwei Wang, Chuan Wang
Summary: This study investigates the physicochemical and co-combustion properties of hydrochar and anthracite. The results show that adding hydrochar can effectively improve the combustion efficiency of mixed fuel and reduce emissions.
Article
Green & Sustainable Science & Technology
Kai Wang, Jianliang Zhang, Shengli Wu, Jianlong Wu, Kun Xu, Jiawen Liu, Xiaojun Ning, Guangwei Wang
Summary: In this paper, the hydrothermal carbonization (HTC) method was used to upgrade biomass for blast furnace injection. The hydrochar prepared through HTC treatment showed high fixed carbon and low ash and alkali metal content. It also exhibited good grindability and combustion performance, meeting the requirements for blast furnace injection.
Article
Green & Sustainable Science & Technology
Jorge Perpinan, Manuel Bailera, Begona Pena, Luis M. Romeo, Valerie Eveloy
Summary: This paper presents a novel integration of carbon capture and power to gas technologies in the steelmaking industry. Green hydrogen is produced via PEM electrolysis and CO2 is scrubbed from blast furnace gas to produce synthetic natural gas, which is then injected into the blast furnace. The oxygen produced in the electrolyzer covers the entire oxygen demand of the steelmaking plant.
JOURNAL OF CLEANER PRODUCTION
(2023)