Numerical Analysis of the Dust Control Performance of a Counter-current Swirling Configuration in the Flash Ironmaking Reactor

Yang, Yiru; Shen, Zhongjie; Xu, Jianliang; Liu, Haifeng

doi:10.2355/isijinternational.isijint-2022-092

Cited by 2 publications

(1 citation statement)

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“…[24] In addition, Yang et al combined experiments and CFD modeling to predict the possibility of ore powder adhering to the furnace wall [25] and improved the ore powder reduction by changing the injection angle of ore powder and using a counter-current downer device. [26,27] Beyond that, Zhu's team not only validated the kinetic parameters of Sohn's magnetite reduction parameters by combining experiments and CFD simulations but also studied the effects of particle shape, size, and moisture on the reduction behavior of ore powder, [28] and they also investigated the impact of the ore powder injection method on ore reduction. [29] Given the low carbon emission and high efficiency of flash ironmaking, scholars have analyzed the reductants used in flash ironmaking using the energy-mass balance analysis method and found that hydrogen is the optimal reductant for the flash ironmaking process.…”

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confidence: 99%

Numerical Simulation of the Effect of Feeding Mode on the Reduction of Ore Powder in Hydrogen‐Based Flash Ironmaking Process

Tan,

Guo,

Yang

et al. 2024

steel research int.

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The efficiency and heat utilization of modern large‐scale blast furnace in China are close to limits. The potential for energy saving and consumption reduction by continuing to improve blast furnace operation is limited, so there is a need to develop nonblast furnace ironmaking technologies to solve the problems of high energy consumption and pollution. The emerging flash ironmaking technology, which is highly efficient and has low pollutant emissions, has become an option. This article uses CFD software to simulate the 3D steady‐state hydrogen‐based flash ironmaking process at a pilot scale. It is a complex system involving gas‐particle two‐phase flow, heat transfer, and chemical reactions. The article mainly studies the effects of the feeding mode and hydrogen concentration in the reducing gas on the reduction of ore particles. The results show that the residence time of the particles in the furnace is very sensitive to the feeding method, and the maximum residence time of the particles reaches about 2.8 s under the optimal feeding method. In addition, increasing the hydrogen concentration in the reducing gas decreases the particles’ residence time. However, the minimum residence time is more than 2.2 s, and the ore powder can still obtain a high reduction degree.

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