Level Meter for the Electromagnetic Continuous Casting of Steel Billet.

Kim, GooHwa; Kim, Ho-Young; Oh, K. J.; Park, Joonpyo; Jeong, Hyein; Lee, Eui-Wan

doi:10.2355/isijinternational.43.224

Cited by 9 publications

(5 citation statements)

References 10 publications

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“…The mould level fluctuation at the 1/2 thickness and 1/8 width ( L p ) was measured using an eddy current sensor. The measurement of mould level instability was technically difficult due to the presence of the mould flux and high temperature, although several special methods have been proposed to measure the mould level instability [18,19]. Mole levels were instability and therefore not measured in this study.…”

Section: Experimental Methodsmentioning

confidence: 99%

Influence of mould level instability on the unevenness of solidified shell deformations during continuous casting

Furumai¹,

Zurob

Phillion

et al. 2023

Ironmaking & Steelmaking

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The influence of mould level instability during continuous casting on the unevenness of the initial solidified shell in hypo-peritectic steels has been investigated. Water model experiments and inplant casting experiments revealed that mould level instability, which increases with increasing casting speed, is related to longitudinal cracking resulting from the unevenness of the solidification shell. A numerical model which considers the effect of mould level instability was developed and used to simulate the formation of the unevenness of the solidification shell and solidified shell deflections. The calculation results show that an increase in the non-uniform infiltration of mould flux increases the unevenness of the solidified shell. On the other hand, the unevenness of the solidified shell decreases due to mild cooling. Overall, the results of the plant tests and calculations show that non-uniform infiltration of mould flux dramatically affects air gap formation and the unevenness of the solidified shell.

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Section: Experimental Methodsmentioning

confidence: 99%

Influence of mould level instability on the unevenness of solidified shell deformations during continuous casting

Furumai¹,

Zurob

Phillion

et al. 2023

Ironmaking & Steelmaking

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show abstract

“…The system requires a sounding bar and a mechanical system to periodically deliver the bar, making it a contact measurement method [21] Level measuring system using electromagnetic induction sensor and difference of magnetic field obtained…”

Section: Referencementioning

confidence: 99%

“…Several non-contact level measuring methods have been proposed by different authors; the sensing principles are based on γ-ray transmission [ 20 , 21 ], eddy current [ 22 ], induction [ 21 ], capacitance [ 23 ], and computer vision methods [ 20 , 24 ]. The use of γ-rays is not suitable in a production plant as it emits high-energy radiation, which can be harmful to the human body [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…The use of γ-rays is not suitable in a production plant as it emits high-energy radiation, which can be harmful to the human body [ 20 ]. Measurement using inductance and capacitance [ 21 , 23 ] requires the sensors to be placed at a close distance to the melt surface, which is not possible inside a furnace. Similarly, the accuracy of electromagnetic methods based on Eddy current sensors [ 22 ] highly depends on the distance of the sensor from the measured object due to the attenuation of the electromagnetic field with distance.…”

Section: Introductionmentioning

confidence: 99%

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Identification of Aluminothermic Reaction and Molten Aluminum Level through Vision System

Ravi,

Conti,

Fasoli

et al. 2023

Sensors

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During the secondary production of aluminum, upon melting the scrap in a furnace, there is the possibility of developing an aluminothermic reaction, which produces oxides in the molten metal bath. Aluminum oxides must be identified and removed from the bath, as they modify the chemical composition and reduce the purity of the product. Furthermore, accurate measurement of molten aluminum level in a casting furnace is crucial to obtain an optimal liquid metal flow rate which influences the final product quality and process efficiency. This paper proposes methods for the identification of aluminothermic reactions and molten aluminum levels in aluminum furnaces. An RGB Camera was used to acquire video from the furnace interior, and computer vision algorithms were developed to identify the aluminothermic reaction and melt level. The algorithms were developed to process the image frames of video acquired from the furnace. Results showed that the proposed system allowed the online identification of the aluminothermic reaction and the molten aluminum level present inside the furnace at a computation time of 0.7 s and 0.4 s per frame, respectively. The advantages and limitations of the different algorithms are presented and discussed.

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“…In POSCO, a safer technique, based on the eddy current, has been employed to obtain the mold level in crystallizer, in which its circumstance is similar to the tundish. This method generates the level in high accuracy, however, the measurement range reaches merely 0-300 mm, [6][7][8][9] which is too short for the molten steel level in tundish. Through a similar principle, the AGELLIS Company proposes a longer range measurement system for the molten steel level in a tundish.…”

Section: Introductionmentioning

confidence: 99%

Molten Steel Level Measurement Based on Temperature Attenuation Characteristic

Xie

2016

ISIJ Int.

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This paper proposes a molten steel level measuring method in a tundish. This method is based on the temperature attenuation characteristic of the temperature tube. Our previous work focused on the temperature distribution of the temperature tube which can be used for molten steel level measurement. In some continuous casters, sticky slag adheres to the tube, thus, blocking the temperature information on the tube. To avoid this problem of lacking true temperature, we analyzed the principle of adhesion and conclude that the adhesive slag thickness of the tube is influenced by whether that part of the tube contacts the slag or the molten steel prior to being lifted. Consequently, for detecting the adhesive slag thickness online with available pyrometer, a heat transfer model is established. Through analysis of the model, it was revealed that the thickness of the adhesive slag remarkably influences the measurable maximum curvature time of the temperature attenuation. In addition, this maximum curvature time is insensitive to other irrelevant factors such as initial temperature and ambient temperature. Therefore, the maximum curvature time of the temperature attenuation of the adhesive slag indirectly indicates the molten steel level. Finally, the experiments prove the feasibility and the sound accuracy of this method with the maximal error being 3 mm. This method is not only suited for the molten steel level measurement, but also applicable to other non-destructive measurement of coating layer thickness.

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Level Meter for the Electromagnetic Continuous Casting of Steel Billet.

Cited by 9 publications

References 10 publications

Influence of mould level instability on the unevenness of solidified shell deformations during continuous casting

Influence of mould level instability on the unevenness of solidified shell deformations during continuous casting

Identification of Aluminothermic Reaction and Molten Aluminum Level through Vision System

Molten Steel Level Measurement Based on Temperature Attenuation Characteristic

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