Numerical simulation on novel blast furnace operation of combining coke oven gas injection with hot burden charging

Liu, Z.; Chu, Mansheng; Guo, Tong; Wang, H.; Fu, Xin

doi:10.1179/1743281215y.0000000050

Cited by 18 publications

(7 citation statements)

References 20 publications

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“…The coke rate, however, can be reduced with the increased RCOG injection rate, which has also been reported in the previous research studies. 4,26,27,30,31 This is because, first, the additional thermal energy brought by the RCOG can help decrease the amount of coke to provide heat, and second, the reducing agents in RCOG, particularly hydrogen can partly replace the coke as the reactant to participate in the chemical reactions. Inside a BF, coke is combusted in front of the raceway to provide the gaseous reducing agent CO to participate in the reduction process of iron oxides.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…29 Then, Liu et al proposed a BF novel operation, which combines the tuyere COG injection and hot burden charging to provide more thermal energy to the upper shaft. 30 The model was then applied to simulate the Mei Steel No. 2 BF with COG injection at the tuyere level.…”

Section: ■ Introductionmentioning

confidence: 99%

“…However, the independent effects of COG injection on BF performance have not been discussed . Then, Liu et al proposed a BF novel operation, which combines the tuyere COG injection and hot burden charging to provide more thermal energy to the upper shaft . The model was then applied to simulate the Mei Steel No.…”

Section: Introductionmentioning

confidence: 99%

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Model Study of Shaft Injection of Reformed Coke Oven Gas in a Blast Furnace

Zhang

Shen

et al. 2020

Energy Fuels

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Reformed coke oven gas (RCOG), a hydrogen-rich gas, is a promising auxiliary fuel for ironmaking blast furnaces (BFs) for lowing the coke consumption and production cost. It can be practiced via shaft injection. However, the effect of RCOG shaft injection on the inner state and BF performance has not been fully understood. In this research, the injection of RCOG at the BF shaft is investigated using the multiphase BF model, considering the respective burden layer structure. The in-furnace phenomena with and without RCOG shaft injection are first compared. The simulation results show that the BF inner state can be affected by the thermal energy and the reductive agents brought in by the RCOG and the interaction between the RCOG flow and the gas flow from the BF tuyere level. Then, the effect of different injection rates of RCOG and injection angles on the BF inner state and production performance are studied. It is indicated that with the increased RCOG injection rate, the hydrogen concentration increases, and the near-wall ferrous oxide reduction degree can be improved; the profiles of the cohesive zone (CZ) along the BF center moves upward, and the profiles of CZ becomes narrower. Also, the coke rate decreases as the shaft injection rate increases. On the other hand, the injection angle has an insignificant effect on the BF inner situation and reductant utilization efficiency under the simulation conditions. Overall, the BF RCOG shaft injection can make a positive contribution to coke saving and BF performance improvement.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

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Model Study of Shaft Injection of Reformed Coke Oven Gas in a Blast Furnace

Zhang

Shen

et al. 2020

Energy Fuels

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“…This explanation matches the results of previous studies. [49,50] In 2013, Chu and coworkers [51][52][53] conducted a 2D simulation study of the OBF process with COG injected through hearth tuyeres. Figure 5 and 6, respectively, shows the temperature distributions of solid burden and reduction degree under different oxygen contents conditions.…”

Section: Two-dimensional Modelsmentioning

confidence: 99%

A Review on Explorations of the Oxygen Blast Furnace Process

Zhang

Dai

et al. 2020

steel research int.

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The oxygen blast furnace (OBF) process has been extensively studied theoretically because of the potentials of promising energy conservation and CO2 emission reduction. Herein, investigations of the OBF process are reviewed and some suggestions for its future development are presented. The main findings can be condensed into the following: static and dynamic models of the OBF should be revised to considering the newest theoretical findings in the thermodynamics and kinetics involved as well as the particular limitations of the technology. Models focusing on energy demand and emissions should be further developed and applied to enhance the design for increased efficiency and sustainability of the complicated OBF system. It will be challenging to operate the full OBF process with top gas recycling (TGR). The development of mathematical models focusing on the practical operation is therefore warranted and would provide useful tools for tackling control problems and difficulties that will arise in forthcoming industrial trials. Considering these potential challenges, a medium oxygen‐enriched blast furnace with TGR as a forerunner is suggested because its operation conditions show greater resemblance with those of the traditional blast furnace. This furthermore provides a path of transition to the use of the full OBF in industrial scale.

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“…Zhang et al examined the flow and thermochemical behaviors in an oxygen BF and found that the magnetite reserve zone wherein the composition of iron ore remains steady is significantly reduced by the strongly reducing atmosphere compared to the conventional BF. Chu and his colleagues analyzed the usage of different technologies such as top gas recycling, hot burden charging, injection of coke oven gas and natural gas, and their different combinations, which provides detailed evidence for the implementation of these technologies in aspects of the in‐furnace state and global performance.…”

Section: Modeling and Simulation Of Different Bf Regionsmentioning

confidence: 99%

Review on Modeling and Simulation of Blast Furnace

Kuang

2017

steel research int.

172

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The design and control of blast furnace (BF) ironmaking must be optimized in order to be competitive and sustainable, particularly under the more and more demanding and tough economic and environmental conditions. To achieve this, it is necessary to understand the complex multiphase flow, heat and mass transfer, and global performance of a BF under different conditions. Mathematical modeling, often coupled with physical modeling, plays an important role in this area. This paper reviews the recent developments in this direction. The emphasis is given to mathematical models for different BF regions from the top charging system, body, and finally down to raceway and hearth. The needs for the further research and developments are also discussed.

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Numerical simulation on novel blast furnace operation of combining coke oven gas injection with hot burden charging

Cited by 18 publications

References 20 publications

Model Study of Shaft Injection of Reformed Coke Oven Gas in a Blast Furnace

Model Study of Shaft Injection of Reformed Coke Oven Gas in a Blast Furnace

A Review on Explorations of the Oxygen Blast Furnace Process

Review on Modeling and Simulation of Blast Furnace

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