Design of Magnetic Fields for Half and Full Type Electromagnetic Swirl Flow Generators. Issue 4 (8th April 2015)

• Record Type: Journal Article
• Authors: Yang, Ying; Jönsson, Pär G.; Su, Zhijian; He, Jicheng; Nakajima, Keiji
• Is Part Of: Steel research international. Volume 86:Issue 4(2015:Apr.)
• Page Start: 361
• Page End: 374
• Publication Date: 2015-04-08
• Subjects: rotating magnetic field -- electromagnetic swirl flow generator -- full type -- half type; Steel -- Periodicals; Steel -- Metallurgy -- Periodicals; 669.142
• DOI: 10.1002/srin.201300463
• Languages: English
• ISSNs: 1611-3683

Abstract

Abstract : In this work, the placement of an electromagnetic swirl flow generator (EMSFG) around a submerged entry nozzle (SEN) was proposed as a method for generating a rotating electromagnetic field in a continuous casting (CC) process of steel. First, two kinds of a full type EMSFG and a half type EMSFG were designed based on mathematical modeling. Then, distributions of magnetic flux intensity in an EMSFG as well as distributions of Lorentz force in molten steel were simulated. It was found that the EMSFG structure and electromagnetic parameters have an important effect on magnetic flux intensity and Lorentz force distributions. For both a full type and a half type EMSFG, the magnetic flux intensity and Lorentz force increases as the magnetomotive force increases. Especially, for a full type EMSFG, the magnetic flux intensity is distributed evenly in molten steel. Moreover, the Lorentz force increases along a radial direction in the molten steel in the SEN. However, for a half type EMSFG, the magnetic flux intensity and Lorentz force decreases gradually towards the region without an EMSFG. Consequently, a full type EMSFG with a 44 000 AT magnetomotive force and a 50 Hz frequency is more suitable to apply in the operation of an EMSFG under actual production conditions. Abstract : Two kinds of a full type and a half type electromagnetic swirl flow generators (EMSFG) are studied. Moreover, those two type devices with different magnetomotive forces, frequencies as well as core distances are also investigated. Furthermore, the distribution of the magnetic flux intensity in molten steel and EMSFG and the distribution of the Lorentz force in molten steel are discussed by using different EMSFG structures and electromagnetic parameters.