Influence of Electromagnetic Stirring Position on Liquid Level Fluctuation in Billet Mold

2019 ◽  
Author(s):  
S. Wei ◽  
Y. Yindong ◽  
J. Benhui ◽  
Z. Zhang ◽  
Y. Peng ◽  
...  
Keyword(s):  
Electromagnetic Stirring ◽  
Liquid Level ◽  
Level Fluctuation

Two-phase analysis of interface level fluctuation in continuous casting mold with electromagnetic stirring

2018 ◽  
Vol 28 (9) ◽  
pp. 2036-2051 ◽  
Author(s):  
Ambrish Maurya ◽  
Pradeep Kumar Jha
Keyword(s):  
Electromagnetic Field ◽  
Fluid Flow ◽  
Mold Flux ◽  
Electromagnetic Stirring ◽  
Level Fluctuation ◽  
Stability Criteria ◽  
Two Phase ◽  
Content Type ◽  
Coupled Numerical Model ◽  
Phase Fluid

Purpose This investigation aims to analyze the steel-flux interface level fluctuation because of electromagnetic stirring and its process parameters in a continuous casting billet mold. Design/methodology/approach An un-coupled numerical model for electromagnetic field generation and a coupled numerical model of electromagnetic field and two-phase fluid flow have been developed. The two-phase fluid flow has been modeled using volume of fluid method, in which externally generated time-varying electromagnetic field is coupled and analyzed using magnetohydrodynamic method. Top surface standing wave stability criteria are used to study the criticality of interface stability. Findings Results show that application electromagnetic field for stirring increases the interface level fluctuation, specifically at the mold corners and near the submerged entry nozzle. The increase in current intensity and stirrer width barely affect the interface level. However, interface level fluctuation increases considerably with increase in frequency. Using stability criteria, it is found that at 20 Hz frequency, the ratio of height to wavelength of interface wave increases much above the critical value. The iso-surface of the interface level shows that at 20 Hz frequency, mold flux gets entrapped into the liquid steel. Practical implications The model may be used during optimization of in-mold electromagnetic stirrer to avoid mold flux entrapment and control the cast quality. Originality/value The study of mold level fluctuation in the presence of in-mold electromagnetic stirrer has rarely been reported. The criticality of stirrer process parameters on level fluctuation has not been yet reported. This study lacks in experimental validation; however, the findings will be much useful for the steelmakers to reduce the casting defects.

Characters of Lorenz Force Generated by a Single Linear Electromagnetic Stirrer

2012 ◽  
Vol 472-475 ◽  
pp. 538-542
Author(s):  
Yan Hua Li ◽  
Ling Kang Ji ◽  
Qiang Chi ◽  
Qing Ren Xiong ◽  
Hong Yuan Chen
Keyword(s):  
Liquid Metal ◽  
Electromagnetic Force ◽  
Maxwell’S Equations ◽  
Maxwell's Equations ◽  
Internal Flow ◽  
Electromagnetic Stirring ◽  
Reasonable Assumption ◽  
Level Fluctuation ◽  
Force Analysis ◽  
Force Amplitude

The internal flow and level fluctuation of liquid metal exposed to linear electromagnetic stirring are mainly induced by the electromagnetic force. As a result, it is necessary to estimate the electromagnetic force amplitude generated by electromagnetic stirrers. The Maxwell's equations were simplified on some reasonable assumption so as to estimate the electromagnetic force amplitude in this study. During the electromagnetic force analysis, the characters of the electromagnetic force in liquid metal exposed to a linear electromagnetic stirrer were determined at the same time.

Study of Inclusion’s Source and Character in Different T[O] Content

2014 ◽  
Vol 887-888 ◽  
pp. 187-190
Author(s):  
Yan Wang ◽  
Qing Xiao Li ◽  
Shuo Ming Wang ◽  
Peng Long Han
Keyword(s):  
Refractory Material ◽  
Molten Slag ◽  
Great Influence ◽  
Slag Inclusion ◽  
Liquid Level ◽  
Refractory Materials ◽  
Level Fluctuation ◽  
Covering Slag ◽  
Inclusions In Steel

Inclusion’s source and character in different T[ content are studied in the paper, molten slag and refractory material that leave in steel are also calculated. Inclusion in steel are principally come from deoxidation, accompany with the decrease of T[ content, influence of molten slag and refractory materials to inclusions are getting more and more serials. Inclusions which come from molten slag and refractory material are 88.9%, 24.6% and 18.1% defenetly. Great influence on non steady large inclusions in T[ steel, when the mold level fluctuation is large, almost 100% of inclusions in steel have slag inclusion of covering slag. When tundish liquid level fluctuation is large, about 30%~60% inclusions in steel have tundish slag.

Hydrostatic Fiber Optic Liquid Level Sensor with position sensitive detector

Metrologiya ◽  
2020 ◽  
pp. 38-51
Author(s):  
V. N. Astapov ◽  
I. N. Kozlova
Keyword(s):  
Fiber Optic ◽  
Effective Area ◽  
Raw Material ◽  
Position Sensitive Detector ◽  
Fiber Optic Sensor ◽  
Liquid Level ◽  
Problem Solution ◽  
Sensitive Detector ◽  
Position Sensitive ◽  
Triangulation Sensor

This article presents the rationale and methodology for developing an intrinsically safe device, namely, a hydrostatic fiber optic sensor with a position-sensitive detector for monitoring the level of oil products in large-capacity tanks at oil depots and during pumping in a raw material warehouses. This device suitable for continuous monitoring of the liquid level, based on the measurement of a hydrostatic column of liquid with automatic offset of changes in the density of the liquid. Offset is carried out by means of a displacer (a fully submerged float), inside which a housing with a position-sensitive detector (PSD) is integrated. Theoretical validation of the bellows suspension usage for a displacer is given. During filling a container with a liquid whose level is measured, liquid bellows, the movement of which is recorded by an optical triangulation sensor using the reflected infrared ray incident on the bottom of the bellows. The principle of the triangulation sensor operation is based on the geometric properties of the triangles. The pulses of infrared radiation come through a fiber optic cable. In order to measure the movement of the surface (the bottom of the bellows) by measuring the movement of the reflected beam, a position-sensitive detector is used, which is located in a remote controller. In this device for the intrinsic safety problem solution, optical inputs of a fiber optic flat cable are located in the active zone of the sensor, which is connected to the optical inputs of a position-sensitive detector, operated on the principles of photoelectric effect. The light spot moving along the sensitive zone and converted by the detector into a one-dimensional signal proportional to the distance to the object. hydrostatically applies pressure over the entire effective area of the measuring

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