A heating tundish — The final link in a continuous steelmaking technology

Okorokov, G. N.; Donets, A. I.; Shevtsov, A. Z.; Sinel’nikov, V. A.; Yugov, P. I.; Zin'ko, B. F.; Krutyanskii, M. M.; Popov, A. M.

doi:10.1007/bf02765047

Cited by 4 publications

(2 citation statements)

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“…From the tapping of the previous process to the completion of pouring, the temperature drop of molten steel is up to 55 °C, and the temperature change range of tundish during pouring is 20–30 °C. Tundish heating technology can flexibly compensate for the energy loss in the transfer and pouring process [ 17 ], reduce the tapping temperature in the previous process, and, more importantly, it can accurately control the superheat of tundish molten steel in the range of 10 °C.…”

Section: Introductionmentioning

confidence: 99%

Application of Graphite Electrode Plasma Heating Technology in Continuous Casting

Wang

Song

Nai-liang³

et al. 2022

Materials

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In this study, the industrial, experimental effect of a plasma heating system in the form of graphite electrode in the tundish of double-strand slab caster was evaluated for the first time. The system uses three graphite electrodes, two of which are cathodes and one of which is an anode, to form a conductive loop through molten steel in the tundish. The system is built on an old two-strand slab caster and is installed on the premise that the original ladle tundish equipment remains unchanged. The normal working power of the system is up to 1500 kW, and the heating rate of molten steel in the tundish can reach 1.0 °C/min under conditions of 5 t/min total steel throughput and a tundish capacity of 50 t. After the system was put into operation, the purity of molten steel undergoing heating was investigated. The sample analysis of low carbon steel and ultra-low carbon steel before and after heating showed that the contents of N and O in the steel did not increase, while the size of the oxide inclusions near the heating point increased but showed little change in terms of the overall quantity. This process benefited from the addition of inert gas during the heating process to control the atmosphere in the heating area, which prevents reoxidation. The sample analysis also showed that there is no obvious carbon absorption phenomenon after heating, and the fluctuation in C content is within 0.0001%, which is consistent with the general production results. By using this system, the temperature of molten steel in the steelmaking process can be reduced by 10~15 °C, allowing continuous low superheat casting to be supported, which is helpful for reducing production costs and improving the solidified structure inside the slab. The results of the study show that the plasma heating technology can be applied to the continuous casting of low carbon–nitrogen steel slabs, which shows the benefits of reducing emissions and improving production efficiency.

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Section: Introductionmentioning

confidence: 99%

Application of Graphite Electrode Plasma Heating Technology in Continuous Casting

Wang

Song

Nai-liang³

et al. 2022

Materials

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“…Innovative tundish design is necessary to satisfy the increasingly demanding requirements on the quality of continuous cast molten steel. 1 In recent years, tundish combined with plasma heating 1,2 and induction heating (IH) 3,4 has been utilised to improve inclusion removal and constant temperature casting in slab or billet continuous casting. Channel-type IH in the tundish actively influences the flow, heat transfer and inclusion removal of molten steel during continuous casting.…”

Section: Introductionmentioning

confidence: 99%

Magnetohydrodynamic flows and heat transfer in a twin-channel induction heating tundish

Yue

Zhang

Pei

2016

Ironmaking & Steelmaking

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Induction heating (IH) electromagnetic field has a significant positive effect on the uniform temperature distribution in tundishes and decreases molten steel superheat to improve the quality of billets in continuous casting. To achieve the effect of electromagnetic force and Joule heating for molten steel in a channel-type IH tundish, a magnetohydrodynamic model is developed and validated by industrial experiment data. The molten steel in the tundish channel has a rotating velocity under the off-centre electromagnetic force. Its flow pattern consists of two contra-rotating vortices close to the outlet zone of the channels. The upper and lower vortices in the tundish channel change with time. The temperature distribution in the cross-sections is almost stable, and the maximum temperature increases by 30.1°C. Molten steel runs upward after flowing past the tundish channel, whose density decreases because of IH. The upward motion changes when the electromagnetic force acts on the molten steel. Results reveal that electromagnetic force has a significant effect on the flow of molten steel in the tundish, and that flow pattern varies in the tundish with or without electromagnetic force under Joule heating.

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Development and application of a multi-graphite electrode DC plasma tundish heating

Wang

Zhao

et al. 2022

J. Iron Steel Res. Int.

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A heating tundish — The final link in a continuous steelmaking technology

Cited by 4 publications

References 0 publications

Application of Graphite Electrode Plasma Heating Technology in Continuous Casting

Application of Graphite Electrode Plasma Heating Technology in Continuous Casting

Magnetohydrodynamic flows and heat transfer in a twin-channel induction heating tundish

Development and application of a multi-graphite electrode DC plasma tundish heating

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