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
Energy & Fuels
Zhexi Li, Weibo Tie, Junchen Huang, Qi Wang, Tingle Li, Songtao Yang, Song Zhang
Summary: This research demonstrates the reliability of CRI and CSR through comparative experiments using different temperature modes. The study reveals significant differences in CRI and CSR among different coke samples, with varying reactions rates affected by temperature. The constant center temperature method accurately simulates the dissolution and degradation behavior of coke in blast furnaces.
Article
Thermodynamics
Chong Zou, Siqi Li, Hao Wu, Yuan She, Mengmeng Ren, Weian Wang, Ruimeng Shi
Summary: The composition and microstructure of charging coke and raceway coke of a blast furnace were studied. It was found that raceway coke has higher graphite layer accumulation height and size, as well as a more developed pore structure, resulting in a higher reaction rate compared to coke.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Environmental
Shungo Natsui, Azuma Hirai, Koki Terui, Yusuke Kashihara, Akinori Murao, Yuji Miki, Hiroshi Nogami
Summary: This study investigated the impact of fine coke particles on gas flow and clogging in the coke packed bed, revealing the potential for improving blast furnace efficiency. Mechanical destruction of cokes was found to change bed permeability, affecting gas flow distribution and pressure drop. The study demonstrates that forming bridges among cokes can maintain permeability and increase the possibility of low-coke operations.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Kai Zhu, Zhuming Chen, Shuixin Ye, Shuhua Geng, Yuwen Zhang, Xionggang Lu
Summary: This study systematically investigated the application of iron coke in hydrogen-rich blast furnace and studied its initial gasification temperature and co-gasification reaction mechanism with coke. The results showed that the initial gasification temperature of iron coke decreased with the increase in the iron ore powder content. Iron coke with iron ore powder addition exhibited higher reactivity and could protect the skeleton function of coke during co-gasification.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Thermodynamics
Hao Wu, Chong Zou, Yuan She, Mengmeng Ren
Summary: By studying the physicochemical properties and gasification characteristics of coke, it was found that tuyere coke has better gasification reactivity and is more suitable to be described by the RPM model. The promotion effect of tuyere coke can be achieved by reducing the activation energy, which is linearly related to the coverage of alkali metals in coke. The gasification reaction rate of coke at 900 degrees C can be significantly increased.
THERMOCHIMICA ACTA
(2022)
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
Metallurgy & Metallurgical Engineering
S. K. Kushwaha, A. Kumar, B. Ghosh, P. K. Jha, K. K. Manjhi
Summary: Carbonization test using pilot coke oven is crucial for evaluating coke-making ability of metallurgical coals. To overcome the limitations of cost and time associated with functional pilot coke ovens, a small-scale carbonization equipment was designed and developed, showing strong correlations with results from standard pilot ovens.
TRANSACTIONS OF THE INDIAN INSTITUTE OF METALS
(2021)
Article
Metallurgy & Metallurgical Engineering
Raymond James Longbottom, Zhe Wang, Kim Hockings, Brian Joseph Monaghan
Summary: The proportions of minerals in the alumina-silica-magnetite ternary system have a linear relationship with the reactivity of coke analogues. Quartz decreases reactivity, alumina has minimal effect, while magnetite increases reactivity. Similar effects were observed for binary combinations of mullite-magnetite and kaolinite-magnetite.
ISIJ INTERNATIONAL
(2021)
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
Energy & Fuels
Monalisa Gangopadhyay, Gautam K. Bayen, Manish Kumar, Ashish Mukherjee, Rajiv Ranjan, Saroj Kumar
Summary: This article discusses the impact of preheating and stamp charging of coal on coke quality parameters and compares them with other production methods. A total of five different coal samples were preheated and compacted to achieve higher bulk density before high-temperature carbonization, showing significant differences in CRI and CSR values between cokes produced in preheating and stamp-charging compared to other techniques.
INTERNATIONAL JOURNAL OF COAL PREPARATION AND UTILIZATION
(2022)
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
Energy & Fuels
Deepak Kumar, V. K. Saxena, H. P. Tiwari, V. K. Tiwary
Summary: Traditionally, coke reactivity index and coke strength after reaction are evaluated by reacting coke with carbon dioxide in standard conditions. Developing a method for predicting almost real-time data is essential due to the lengthy testing methodology. The newly developed methodology by infrared gas analyzer can provide real-time coke reactivity index and estimate the coke strength within 10 minutes of reaction time.
INTERNATIONAL JOURNAL OF COAL PREPARATION AND UTILIZATION
(2022)
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
Engineering, Environmental
Amit Mondal, Supriya Sarkar, Udayabhanu G. Nair
Summary: The study compared the characteristics of coke plant and blast furnace wastewater, finding that the water matrices of the two sources are totally different and the concentration of free cyanide is more affected in coke plant wastewater.
WATER SCIENCE AND TECHNOLOGY
(2021)