An Online Contactless Investigation of the Meniscus Velocity in a Continuous Casting Mold Using Lorentz Force Velocimetry

Liu, Runcong; Wang, Xiaodong; Xu, Guodong; Lyu, Ze; Kolesnikov, Yuri; Xianzhao, Na

doi:10.1007/s11663-019-01757-z

Cited by 6 publications

(10 citation statements)

References 30 publications

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“…Based on the principle of electromagnetic induction, the moving conductor moves in the magnetic field generated by a permanent magnet or energized coil, an eddy current is induced within the conductor, and the interaction between the eddy current and the magnetic field produces Lorentz force that intent to brake the movement of the conductor. According to the derivation and scale analysis in our previous study [3], it is known that the Lorentz force is only proportional to the moving speed and conductivity of the conductor while the object and magnet field remain unchanged, such as figure 1 and [26]:…”

Section: Description Of the Set-upmentioning

confidence: 99%

“…Because of its contact-less and intelligent controlling characteristics, the Lorentz force drive [1,2] and measurement technology [3][4][5] based on electromagnetic induction yields * Author to whom any correspondence should be addressed. significant industrial application prospects, Since Shercliff and Thess.…”

Section: Introductionmentioning

confidence: 99%

“…Kolesnikov and Jian conducted measurements of molten aluminum and steel using a pendulum structure [23] and a TOFdesigned LFV [24], respectively. Although these experiments showed that the thermal erosion ability of the open pipeline was limited, inspired by their beneficial attempts, we successfully completed on-site measurement of meniscus flow in the continuous casting mold (CCM) [3] and zinc flow in the hot galvanized process [25] of the industrial field, based on insulation designing and dynamic analysis during the previous study, which extends the inspiration and technical guideline for industrial online measurement of the LFV. However, how to get over the harsh environment of industrial sites (such as vibration, noise, and high temperature) and establish the online dynamic calibration ability during the online measurement are challenges that LFV cannot ignore.…”

Section: Introductionmentioning

confidence: 99%

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A dynamic method for online measurement and calibrating with Lorentz force velocimetry

Zheng,

Li,

Guo

et al. 2024

Meas. Sci. Technol.

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Our previous study [1-2] reports a non-invasive in-situ measurement technology using Lorentz force velocimetry to quantitatively measure the meniscus velocity of molten steel online. However, effective signal recognition from complex environment noise and determination of zero-point calibration in harsh metallurgical processing is an essentially challenging task and indeed needs further exploration. In this paper, a method of combining double probe arrangement with real-time differential processing technology was proposed, the twin design structure not only enables the measurement of ~mN Lorentz forces, but also has significant characteristics of environmental tolerance. The Lorentz force signal caused by conductor motion can be accurately calculated through a differential method, meaning that the problem of zero compensation in industrial online measurement can be effectively overcome. Moreover, based on the functional correlation between the Lorentz force and the parameter of the conductor to be measured, a method of the probes moving variably and actively and their data difference ratio processing was adopted, so as to achieve dynamic calibration during online measurement. This measurement strategy provides a new approach for LFV to achieve online dynamic measurement and online calibration, and provides technical support for electromagnetic measurement technology towards engineering applications.

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Section: Description Of the Set-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A dynamic method for online measurement and calibrating with Lorentz force velocimetry

Zheng,

Li,

Guo

et al. 2024

Meas. Sci. Technol.

Self Cite

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“…Contactless methods for local velocity measurements exploit the high electrical conductivity of the liquid steel and rely on the principle of induction. Recently, Lorentz force velocimetry was tested to monitor the meniscus velocity in a steel caster [ 8 ]. The downside of localized velocity measurements is that information is provided only at a single point or small region in space, while several sensors would be needed to capture the overall flow pattern.…”

Section: Introductionmentioning

confidence: 99%

Laboratory Investigation of Tomography-Controlled Continuous Steel Casting

Glavinić

Muttakin

Abouelazayem

et al. 2022

Sensors

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More than 96% of steel in the world is produced via the method of continuous casting. The flow condition in the mould, where the initial solidification occurs, has a significant impact on the quality of steel products. It is important to have timely, and perhaps automated, control of the flow during casting. This work presents a new concept of using contactless inductive flow tomography (CIFT) as a sensor for a novel controller, which alters the strength of an electromagnetic brake (EMBr) of ruler type based on the reconstructed flow structure in the mould. The method was developed for the small-scale Liquid Metal Model for Continuous Casting (mini-LIMMCAST) facility available at the Helmholtz-Zentrum Dresden-Rossendorf. As an example of an undesired flow condition, clogging of the submerged entry nozzle (SEN) was modelled by partly closing one of the side ports of the SEN; in combination with an active EMBr, the jet penetrates deeper into the mould than when the EMBr is switched off. Corresponding flow patterns are detected by extracting the impingement position of the jets at the narrow faces of the mould from the CIFT reconstruction. The controller is designed to detect to undesired flow condition and switch off the EMBr. The temporal resolution of CIFT is 0.5 s.

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“…Contactless local flow measurements have been conducted with AMEPA's Mould Flow Measurement [8,9], where a near-wall velocity is derived from the correlation of fluctuating signals recorded by two inductive sensors embedded in the mould wall. Another attempt for monitoring the meniscus velocities was made by using Lorentz Force Velocimetry [10]. A measurement technique for monitoring the complete flow structure in the mould is not available yet.…”

Section: Introductionmentioning

confidence: 99%

Contactless Inductive Flow Tomography for Real-Time Control of Electromagnetic Actuators in Metal Casting

Glavinić

Galindo

Stefani

et al. 2022

Sensors

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Flow control of liquid metals based on the actual flow condition is important in many metallurgical applications. For instance, the liquid steel flow in the mould of a continuous caster strongly influences the product quality. The flow can be modified by an electromagnetic brake (EMBr). However, due to the lack of appropriate flow measurement techniques, the control of those actuators is usually not based on the actual flow condition. This article describes the recent developments of the Contactless Inductive Flow Tomography (CIFT) towards a real-time monitoring system, which can be used as an input to the control loop for an EMBr. CIFT relies on measuring the flow-induced perturbation of an applied magnetic field and the solution of an underlying linear inverse problem. In order to implement the CIFT reconstructions in combination with EMBr, two issues have to be solved: (i) compensation of the effects of the change in EMBr strength on the CIFT measurement system and (ii) a real-time solution of the inverse problem. We present solutions of both problems for a model of a continuous caster with a ruler-type EMBr. The EMBr introduces offsets of the measured magnetic field that are several orders of magnitude larger than the very flow-induced perturbations. The offset stems from the ferromagnetic hysteresis exhibited by the ferrous parts of the EMBr in the proximity of the measurement coils. Compensation of the offset was successfully achieved by implementing a numerical model of hysteresis to predict the offset. Real-time reconstruction was achieved by precalculating the computationally heavy matrix inverses for a predefined set of regularization parameters and choosing the optimal one in every measurement frame. Finally, we show that this approach does not hinder the reconstruction quality.

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An Online Contactless Investigation of the Meniscus Velocity in a Continuous Casting Mold Using Lorentz Force Velocimetry

Cited by 6 publications

References 30 publications

A dynamic method for online measurement and calibrating with Lorentz force velocimetry

A dynamic method for online measurement and calibrating with Lorentz force velocimetry

Laboratory Investigation of Tomography-Controlled Continuous Steel Casting

Contactless Inductive Flow Tomography for Real-Time Control of Electromagnetic Actuators in Metal Casting

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