A Journey Towards Improving Tuyere Life

Chatterjee, Rajeswar; Nag, Samik; Kundu, Saurabh; Ghosh, Ujjal; Padmapal,; Singh, Uttam

doi:10.1007/s12666-021-02203-y

Cited by 4 publications

(2 citation statements)

References 9 publications

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“…One method is to enhance the tuyere small sleeve's heat dissipation capability at the front end by optimizing the water structure inside the tuyere. Rajeswar Chatterjee et al [9][10][11] successfully extended the lifespan of the tuyere small sleeve by three months through numerical simulation to optimize the aspect ratio of the front-end cooling water pipeline, strengthening the front-end water velocity to reduce the occurrence of film boiling phenomenon. In addition, Guo X.P.…”

Section: Introductionmentioning

confidence: 99%

Optimization Study of Annular Wear-Resistant Layer Structure for Blast Furnace Tuyere

Zhu

Zhang

Zong

et al. 2023

Metals

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A new tuyere small sleeve coating structure that balances the high thermal conductivity of the copper substrate with the high wear resistance of the protective layer was developed in this paper. This structure can achieve a low-carbon blast furnace by reducing the heat loss from the tuyere. The 3D model was established via Solidworks for modeling and Ansys for numerical simulation, the temperature field of the annular wear-resistant layer structure tuyere small sleeve with different widths of the wear-resistant layer was analyzed and compared with the temperature and stress field of traditional tuyere small sleeve. The results show that the design of the annular wear-resistant layer structure of the tuyere small sleeve is more effective. The new annular wear-resistant layer structure for the tuyere small sleeve results in a decrease of 24 K in the average temperature of the wear-resistant coating. The comparison of this structure with tuyere sleeves without wear-resistant coatings shows a 16.7% reduction in heat loss, improves the wear resistance of the tuyere, providing new technological ideas for low-carbon blast furnace production. Compared with the tuyere sleeve completely covered with a wear-resistant coating, the maximum thermal stress of this structure decreased from 624.98 Mpa to 427.99 Mpa, resulting in a reduction of 31.5%, which is beneficial for the service life of the tuyere sleeve. The copper surface temperature of the new tuyere small sleeve is in a safe range when the temperature is below 2273 K.

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Section: Introductionmentioning

confidence: 99%

Optimization Study of Annular Wear-Resistant Layer Structure for Blast Furnace Tuyere

Zhu

Zhang

Zong

et al. 2023

Metals

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show abstract

“…For example, in this environment, coke not only suffers from the physical effects given by the outside world, such as impact, extrusion, and wear, but also bears the chemical effects, such as melting loss, gasification, alkali metal corrosion, and slag iron penetration. Thus, the requirements for coke quality are becoming higher and higher [7].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Melting Loss Behavior of Blast Furnace Incoming Coke and Radial Tuyere Coke

Chang

et al. 2022

Coatings

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As an indispensable raw material in blast furnace ironmaking, coke plays an important role, which is also the key to low-carbon smelting and reducing ironmaking carbon emissions, so it is necessary to study its quality, degradation behavior, and microstructure evolution. In this work, the pore structure and micromorphology of the blast furnace incoming coke (IC) and tuyere coke (TC) were analyzed comprehensively by comparative research methods. The results showed that the microcrystalline structure of TC was more orderly than that of IC. In addition, the order degree of the coke microcrystalline structure increased first and then decreased in the radial direction and reached the highest value at the distance of 1–2 m from the tuyere. The porosity of radial TC increased obviously. The pore wall became thinner, and the pore size of the original micropores in TC expanded. Simultaneously, large numbers of micropores were also generated, and cracks appeared, resulting in the specific surface area and pore volume of TC becoming higher than that of IC. Moreover, the graphite structure inside TC increased, and the crystal structure became larger. In the radial direction, with an increase in temperature, the number of amorphous structures in coke decreased, the ordering increased, and the graphite structure continued to grow. However, along the direction of the furnace core, a decrease in temperature led to the stagnation of amorphous structure content and a decrease in graphitization degree.

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Failure mode and mechanism of a blast furnace tuyere

Zhang

Wang

et al. 2022

Engineering Failure Analysis

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A Journey Towards Improving Tuyere Life

Cited by 4 publications

References 9 publications

Optimization Study of Annular Wear-Resistant Layer Structure for Blast Furnace Tuyere

Optimization Study of Annular Wear-Resistant Layer Structure for Blast Furnace Tuyere

Microstructure and Melting Loss Behavior of Blast Furnace Incoming Coke and Radial Tuyere Coke

Failure mode and mechanism of a blast furnace tuyere

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