THERMAL SCIENCE
International Scientific Journal
Thermal Science - Online First
online first only
Research on the mechanism of energy attenuation and compensation during the service-life of oxygen lance nozzles
ABSTRACT
In the high-temperature environment inside the converter, the holes of oxygen lance nozzles will gradually be damaged with the increase in the number of blowing times. Therefore, clarifying the characteristics of nozzle jet and the variation of energy attenuation with the increase in number of blowing times is of great guiding significance for top-blown converter steelmaking. In the present work, the 120t converter 5-hole oxygen lance nozzle was taken as the research object, and the jet of nozzles with different damage morphologies were calculated. The jet characteristics and energy attenuation under different blowing heats were comprehensively explored. The results indicated that the wear at the exit of nozzle caused strong fluctuations in the jet, and the energy dissipation during the oscillation stage increased with the increase in the degree of wear. When the blowing heat lied within the range of 241-300, the energy consumption of jet oscillation reached up to 20.31%. A mathematical model was established for the correlation of number of blowing times, oxygen lance heights, and effective impact area. Based on the evaluation index of effective impact area, a compensation scheme for oxygen lance heights and pressure was proposed. The research results provide reference for the rational and efficient use of oxygen lance in industrial smelting.
KEYWORDS
PAPER SUBMITTED: 2024-10-03
PAPER REVISED: 2025-01-14
PAPER ACCEPTED: 2025-06-25
PUBLISHED ONLINE: 2025-08-02
- Li, M. M., et al., Effect of operation parameters on supersonic jet behaviour of BOF six-nozzle oxygen lance, Ironmaking & Steelmaking, 41 (2014), 9, pp. 699-709
- Liu, C., et al., Numerical study of the kinetics of dephosphorization with single-flow post-combustion oxygen lance in converter steelmaking process, Metallurgical and Materials Transactions B, 55 (2024), 2, pp. 999-1013
- Li, J. G., et al., Simulation of flow field of oxygen lance gas jet utilized for 50 t converter, Journal of Iron and Steel Research International, 18 (2011), 4, pp. 11-18
- Liu, F. H, et al., Flow field characteristic of postcombustion oxygen lance formed by various secondary nozzle arrangements, Metallurgical and Materials Transactions B, 55 (2024), 2, pp. 935-949
- Dong, P. Y., et al., Numerical study on gas-metal-slag interaction with single-flow postcombustion oxygen lance in the steelmaking process of a top-blown converter, JOM, 74 (2022), 4, pp. 1509-1520
- Dong, P. Y., et al., Simulation and application of post-combustion oxygen lance in a top-blown converter, Ironmaking & Steelmaking, 50 (2023), 1, pp. 55-66
- Dong, P. Y., et al., Research on nozzle design and application of single-flow postcombustion oxygen lance in a 120 t top-blown converter, Steel Research International, 92 (2021), 11, 2100203
- Tago, Y., Higuchi, Y., Fluid flow analysis of jets from nozzles in top blown process, ISIJ International, 43 (2003), 2, pp. 209-215
- Zhang, Y. C., et al., Jet characteristics of a high-mach-number oxygen-lance nozzle under high oxygen pressure, Metallurgical and Materials Transactions B, 52 (2021), pp. 4070-4081
- Wang, W. J., et al., Three-dimensional compressible flow simulation of top-blown multiple jets in converter, ISIJ International, 50 (2010), 4, pp. 491-500
- Li, L., et al., Physical and mathematical modeling of swirling gas jets impinging onto a liquid bath using a novel nozzles-twisted lance, Steel Research International, 91 (2020), 7, 1900684
- Lv, M., et al., Simulation and application of swirl‐type oxygen lance in vanadium extraction converter, Steel Research International, 84 (2013), 3, pp. 304-312
- Wang, X., et al., Effect of cavity shape caused by jet impact of swirl-type oxygen lance on molten bath mixing efficiency, Ironmaking & Steelmaking, 51 (2024), 5,pp. 460-469
- Wang, H., et al., Numerical simulation of swirl-type lances in vanadium extraction process, Chinese Journal of Engineering, 36 (2014), 1, pp. 89-96
- Liu, G. Q., et al., Numerical investigation on behaviors of interlaced jets and their interaction with bath in BOF steelmaking, AIP Advances, 9 (2019), 7, 075202
- Liu, G. Q., et al., Metallurgical performance of innovative double-parameter oxygen lance in BOF steelmaking, Ironmaking & Steelmaking, 48 (2021), 4, pp. 437-446
- Liu, G. Q., et al., Splash sheet characteristics induced by the impingement of multiple jets in a steelmaking converter, Ironmaking & Steelmaking, 48 (2021), 1, pp. 25-32
- Feng, C., et al., Supersonic jet characteristics of two parameter oxygen lance nozzle, Ironmaking & Steelmaking, 49 (2022), 1, pp. 109-121
- Garajau, F. S., et al., Effects of post-combustion temperature on the wear of the supersonic nozzles in BOF lance tip, Engineering Failure Analysis, 96 (2019), pp. 175-185
- Feng, C., et al., Effect of nozzle exit wear on the fluid flow characteristics of supersonic oxygen lance, Metallurgical and Materials Transactions B, 51 (2020), pp. 187-199
- Lv, M., et al., Effect of the wear of supersonic oxygen lance on the stirring characteristics and metallurgical effects in the converter steelmaking process, Ironmaking & Steelmaking, 50 (2023), 3, pp. 235-243
- Halouane, Y., et al., Turbulent heat transfer for impinging jet flowing inside a cylindrical hot cavity, Thermal Science, 19 (2015), 1, pp. 141-154
- Ahmadi, H., et al., Numerical modeling of a turbulent semi-confined slot jet impinging on a concave surface, Thermal Science, 19 (2015), 1, pp. 129-140
- Boucheffa, N., et al., The 2-D plasma thermal jet simulations with substrate interaction, Thermal Science, 25 (2021), 5, pp. 3467-3478
- Sumi, I., et al., Effect of high-temperature field on supersonic oxygen jet behavior, 46 (2006), 9, pp. 1312-1317
- Li, Z. L., Cang, D. Q., Numerical simulation of supersonic oxygen jets at high ambient temperature, Steel Research International, 88 (2017), 4, 1600209
- Li, M. M., et al., Coalescence characteristics of supersonic jets from multi-nozzle oxygen lance in steelmaking BOF, Steel Research International, 86 (2015), 12, pp. 1517-1529
- Zhao, F., et al., Behaviors of supersonic oxygen multi-jets with various preheating temperatures, Metallurgical and Materials Transactions B-Process Metallurgy and Materials Processing Science, 52 (2021), 4, pp. 2626-2641
- Feng, C., et al., Influence of preheating temperature on the characteristics of O2 + CO2 jet by mixed injection with a swirling oxygen nozzle, JOM, 73 (2021), 10, pp. 2985-2994