Prediction of raceway shape in zinc blast furnace under the different blast parameters

Straka, Róbert; Bernasowski, M.; Klimczyk, A.; Stachura, R.; Svyetlichnyy, Dmytro

doi:10.1016/j.energy.2020.118153

Cited by 7 publications

(4 citation statements)

References 28 publications

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“…to reflect the actual variations in pulverized coal flow. The detection method was evaluated using images from tuyeres in a blast furnace of SSAB Europe in Raahe, Finland, and the results were found to be generally consistent with research findings and actual operating experience [3,6,7,21,22]. The results provide valuable insights into the relationship between coal combustion status and tuyere conditions, which may be utilized in the future to contribute to the enhanced stability of blast furnace operations.…”

Section: Methodssupporting

confidence: 62%

“…Dianyu et al [5] employed a multi-scale approach, combining CFD and EDM, based on granular-level reaction flows in the blast furnace, to study the internal evolution of the blast furnace raceway. Straka et al [6] predicted the shape of the raceway under the different blast parameters. Du et al [7] used a drop-tube furnace to simulate the reactions of PC under BF conditions.…”

Section: Introductionmentioning

confidence: 99%

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A Method for Image-Based Interpretation of the Pulverized Coal Cloud in the Blast Furnace Tuyeres

Zhou,

Saxén,

Mattila

et al. 2024

Processes

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The conditions in the combustion zones, i.e., the raceways, are crucial for the operation of the blast furnace. In recent years, advancements in tuyere cameras and image processing and interpretation techniques have provided a better means by which to obtain information from this region of the furnace. In this study, a comprehensive approach is proposed to visually monitor the status of the pulverized coal cloud at the tuyeres based on a carefully designed processing strategy. Firstly, tuyere images are preprocessed to remove noise and enhance image quality, applying the adaptive Otsu algorithm to detect the edges of the coal cloud, enabling precise delineation of the pulverized coal region. Next, a Swin–Unet model, which combines the strengths of Swin Transformer and U-Net architecture, is employed for accurate segmentation of the coal cloud area. The extracted pulverized coal cloud features are analyzed using RGB super-pixel weighting, which takes into account the variations in color within the cloud region. It is demonstrated that the pulverized coal injection rate shows a correlation with the state of the cloud detected based on the images. The effectiveness of this visual monitoring method is validated using real-world data obtained from a blast furnace of SSAB Europe. The experimental results align with earlier research findings and practical operational experience.

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Section: Methodssupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

A Method for Image-Based Interpretation of the Pulverized Coal Cloud in the Blast Furnace Tuyeres

Zhou,

Saxén,

Mattila

et al. 2024

Processes

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“…In the raceway, the air and coke undergo intense momentum exchange and combustion reaction 3 , which affects the smoothness of gas-solid fl ow in the furnace 4 . The shape of the raceway cavity is closely related to the blast furnace effi ciency as well because the deeper cavity will make the fl ue gas better distributed in the furnace 5 . Therefore, a comprehensive study on the raceway size characteristics is of great signifi cance for further understanding the operation of blast furnace and safety production.…”

Section: Introductionmentioning

confidence: 99%

CFD-DEM simulation of raceway size and mechanical characteristics of industrial scale blast furnace

Gao,

Chan

2023

Polish Journal of Chemical Technology

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The raceway plays a crucial role in ensuring the stable functioning of the ironmaking blast furnace. It is the key site where the chemical reaction of coke combustion takes place, providing the necessary heat and reducing gas for the upper iron ore reduction process. Consequently, the size of the raceway serves as an essential indicator of the blast furnace’s operational condition. In this study, a mathematical model for the raceway of an industrial-scale blast furnace was established. Extensive innovation investigations were conducted to explore the characteristics pertaining to the raceway’s size. The simulation outcomes demonstrate that both the particle size and the inlet velocity exert significant influences on the raceway dimensions. Specifically, the height of the raceway is predominantly affected by the particle size, whereas the inlet velocity predominantly influences the depth of the raceway.

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“…The recent research concerning the ISP are about the utilization of landfilled slags [2][3][4]. However, process modelling publications are limited [5][6][7][8]. Moreover, even though sulphide deposits are running out, ISP technology in HCM has developed toward the use of zinc-bearing waste.…”

mentioning

confidence: 99%

Fuel Consumption Dependence on a Share of Reduction Processes in Imperial Smelting Furnace

2022

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The paper shows the use of novel modelling techniques adapted from ironmaking in the pyrometallurgical process of zinc production. Firstly, regarding the purpose to determine the boundary conditions of reduction processes taking part in the working volume of an Imperial Smelting Furnace (ISF), a deep thermochemical analysis was conducted. On this basis and using Ramm’s principles of direct and indirect reduction optimal share, the fuel rate minimization model was built. The model’s leading role is minimizing coke consumption in the ISF while maintaining the thermal state of the furnace at the correct level. In addition, the proposed presentation of the ISF thermal state shows in a unified way all the shortcomings in the correct process operation. Verification in real conditions on the ISF in Miasteczko Śląskie shows that model implementation can bring tangible benefits. Coke savings can reach over 30 kg per tonne of raw zinc.

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Prediction of raceway shape in zinc blast furnace under the different blast parameters

Cited by 7 publications

References 28 publications

A Method for Image-Based Interpretation of the Pulverized Coal Cloud in the Blast Furnace Tuyeres

A Method for Image-Based Interpretation of the Pulverized Coal Cloud in the Blast Furnace Tuyeres

CFD-DEM simulation of raceway size and mechanical characteristics of industrial scale blast furnace

Fuel Consumption Dependence on a Share of Reduction Processes in Imperial Smelting Furnace

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