Distribution of reformed coke oven gas in a shaft furnace

Jiang, Xin; Yu, Jiaxin; Wang, Lin; Xiang, Dongwen; Gao, Qiuzhi; Zheng, Haiyan; Shen, Fengman

doi:10.1007/s42243-020-00508-8

Cited by 6 publications

(2 citation statements)

References 25 publications

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“…A proper MgO content can ensure the fluidity and desulfurization ability of BF slag, especially for slag with a high content of Al 2 O 3 . − Usually, the method of adding MgO into BF slag is to add MgO-bearing flux into sintering raw materials. Sinter is the main raw material for BF operation, especially in China, and usually, the proportion of sinter in the burden composition is above 75%, − and its cold strength and the low-temperature reduction disintegration index (RDI) are important indices for its quality. , The quality of the sinter not only affects the gas permeability of the upper part of the BF and the smooth operation of the BF − but also has a significant impact on the energy consumption. Therefore, the influence of MgO on the metallurgical properties of sinter has been widely reported. ,, …”

Section: Introductionmentioning

confidence: 99%

Effects of Fine MgO-Bearing Flux on the Strength of Sinter before and after Low-Temperature Reduction

Shen

Jiang

et al. 2022

ACS Omega

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Decreasing the MgO content can improve most of the metallurgical properties of sinter, but the low-temperature reduction disintegration index (RDI) property will be worse. In order to improve the RDI property of sinter under certain MgO contents, the effects of fine MgO-bearing flux on the strength of sintered samples before and after reduction in three systems (Fe 2 O 3 -MgO, Fe 2 O 3 -MgO-CaO, and Fe 2 O 3 -MgO-CaO-SiO 2 ) were investigated in the present work. The experimental results show that (1) in the three systems, the percentage of fine light calcined magnesite (LCM) increases from 0 to 100%, and the compression strength of the samples before reduction increases from 0.140 to 0.187 MPa, from 0.115 to 0.175 MPa, and from 0.121 to 0.164 MPa, respectively. The compression strength of the samples after reduction increases from 0.062 to 0.151 MPa, from 0.100 to 0.156 MPa, and from 0.099 to 0.151 MPa, respectively. (2) The fundamental reason is that the fine powders can increase the specific surface area and the surface energy of the interface. It is beneficial to promoting the mineralization of MgO-bearing flux. More formation of MgO•Fe 2 O 3 may increase the strength of samples before reduction. Less transformation from Fe 2 O 3 to Fe 3 O 4 may increase the strength of samples after reduction. The microstructures of samples are more compact and uniform. Therefore, fine LCM can improve the strength of sinter before and after reduction. The outcomes of the present work can improve the sintering quality by using the fine MgO-bearing flux in the sintering process.

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Section: Introductionmentioning

confidence: 99%

Effects of Fine MgO-Bearing Flux on the Strength of Sinter before and after Low-Temperature Reduction

Shen

Jiang

et al. 2022

ACS Omega

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“…In recent decades, much attention has been given to the implementation of new technologies on the BF. e new technologies include the hot charge of burden materials [1,4,5], injection of novel matters, such as PC [6], oil [7], natural gas [8,9], and hot gas [10][11][12], and use of new burden materials including highly reactive coke [13,14] and carbon composite pellet [15]. ese technologies have been examined at various levels and proved to be useful for improving BF performance.…”

Section: Introductionmentioning

confidence: 99%

Computational Study of Hot Gas Injection (HGI) into an Ironmaking Blast Furnace (BF)

Feng

Wang

2021

Mathematical Problems in Engineering

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Blast furnace (BF) ironmaking is the most important process that produces hot metal (HM) from iron-bearing materials continuously, rapidly, and efficiently. To date, the process is considered to have reached its limit in view of the achieved high process efficiency. In addition, the required high-quality materials are expensive and gradually getting depleted. Hot gas injection (HGI) into the shaft of the BF is an emerging technology recognized potential to solve the aforementioned problems. However, so far, limited information and studies are available, most of which are preliminary studies with regard to the feasibility and aerodynamics of the technology. This hindered the understanding and thus the effective use of this technology. This work presents a numerical study of the multiphase flow, heat, and mass transfer in a BF by a CFD-based process model. The effects of injection composition in terms of CO and CO2 contents in HGI are studied first. The calculated results reveal that HGI of 100% CO delivers the best BF performance. Then, the effects of key variables in relation to HGI of 100% CO, including position, rate, and temperature, are systematically studied. The in-furnace states and overall performance parameters have been analysed in detail. The results show that, through appropriate control of the injection variables, it is possible to achieve improved BF performance including low fuel rate and high productivity, which are considerably affected by the HGI parameters. The BF process model is also demonstrated to be a cost-effective tool in optimizing the key variables of HGI in BF for obtaining optimum process efficiency.

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Effects of Metallization Degree of DRI on the Yield and CO2 Emission in Reduction Shaft Furnace Process

Zhou,

Jiang,

Wang

et al. 2024

J. Sustain. Metall.

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Distribution of reformed coke oven gas in a shaft furnace

Cited by 6 publications

References 25 publications

Effects of Fine MgO-Bearing Flux on the Strength of Sinter before and after Low-Temperature Reduction

Effects of Fine MgO-Bearing Flux on the Strength of Sinter before and after Low-Temperature Reduction

Computational Study of Hot Gas Injection (HGI) into an Ironmaking Blast Furnace (BF)

Effects of Metallization Degree of DRI on the Yield and CO2 Emission in Reduction Shaft Furnace Process

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