Effect of Stabilizing Steel Temperature in a Continuous-Caster Tundish by the Plasma Method on the Uniformity of the Mechanical Properties of Plates After Rolling

Филиппов, Г. А.; Tyuftyaev, A. S.; Gadzhiev, M. Kh.; Yusupov, D. I.; Sargsyan, M. A.

doi:10.1007/s11015-016-0285-8

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…With the development of high-speed casting technology, it has been gradually realized that the influence of molten steel temperature in the tundish cannot be ignored. Reasonable temperature control cannot only improve productivity [ 1 ] and reduce the production cost but also improve the internal quality of continuous casting slabs [ 2 , 3 , 4 , 5 , 6 ]. Low temperature and constant temperature can stabilize the parameters such as superheat and casting speed, simplify the operation of the pouring process, and prevent steel leakage during continuous casting.…”

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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“…Because steel grades require an increasingly high degree of purity, particularly for micro-inclusions with sizes of 1 µm to 50 µm, the tundish must be able to remove the micro-inclusions in the steel [19][20][21][22][23]. Unfortunately, the currently used tundishes and in particular the tundish used for high casting speed caster, cannot remove the micro-inclusions effectively [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Removal Mechanism of Microscale Non-Metallic Inclusions in a Tundish with Multi-Hole-Double-Baffles

Jin

Dong

et al. 2018

Metals

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To effectively remove microscale inclusions in the tundish, the Multi-Hole-Double-Baffles (MHDB), a novel flow control device in the tundish for continuous casting, was developed. The hole array mode of the MHDB will directly affect the trajectories of the inclusions. The effect and removal mechanism of the inclusions with sizes of 1 µm to 50 µm in the tundish with MHDB were studied by numerical simulation. The hole array mode of MHDB could affect the inclusions' trajectories and distribution, and the mechanism underlying the effect of the MHDB was investigated using the discrete phase model (DPM). A 1:2.5 physical model was built to verify the accuracy of numerical simulation. The results showed that micro-inclusions were primarily driven by the drag force exerted by the molten steel flow, micro-inclusion trajectories followed the molten steel streamlines almost exactly, but buoyancy still played a role in the removal of the micro-inclusions near the molten steel surface; the hole array mode affected the trajectories of the micro-inclusions and controlled and decelerated the flow of molten steel, increasing the residence time of the molten steel flow a the value that is 15 times larger than the theoretical value; and "upper-in-lower-out" type MHDB showed the most efficient removal of micro-inclusions, with the removal rate being increased by 13-49% compared to the removal rates for the other type MHDB. The results of numerical simulation were well verified by physical simulation.

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Plasma-ARC Heating of Periclase-Carbonaceous Refractory

et al. 2017

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Effect of Stabilizing Steel Temperature in a Continuous-Caster Tundish by the Plasma Method on the Uniformity of the Mechanical Properties of Plates After Rolling

Cited by 5 publications

References 2 publications

Application of Graphite Electrode Plasma Heating Technology in Continuous Casting

Application of Graphite Electrode Plasma Heating Technology in Continuous Casting

Removal Mechanism of Microscale Non-Metallic Inclusions in a Tundish with Multi-Hole-Double-Baffles

Plasma-ARC Heating of Periclase-Carbonaceous Refractory

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