Siberian Federal University

Issue

Journal of Siberian Federal University. Engineering & Technologies. 2021 14 (5)

Authors

Timofeev, Viktor N.; Strombskoy, Ilya A.; Alekseeva, Anna B.

Contact information

Timofeev, Viktor N.: Siberian Federal University Krasnoyarsk, Russian Federation; Strombskoy, Ilya A.: OOO «RUSAL ITC» Krasnoyarsk, Russian Federation; ; Alekseeva, Anna B.: Siberian Federal University Krasnoyarsk, Russian Federation

Keywords

filling conveyor; Induction heating; inductor – mold system; aluminum ingot; magnetic field

Abstract

In the smelting and foundry production of aluminum ingots, filling conveyors are widely used. Aluminum ingots of a certain shape and weight are obtained by crystallizing liquid aluminum (melt) in the molds of the filling conveyor. As the mills move along the conveyor, the melt gradually hardens in them. In high-performance conveyors, the mills move through the water to increase the cooling rate of the melt. Therefore, after the mill is freed from the hardened ingot, water enters it. In order to avoid temperature shock and possible release of liquid metal, the molds must be dried and heated before pouring. At present, gas burners are used in aluminum plants for this purpose [1]. The purpose of this work is to study the possibility of induction heating of the filling conveyor molds. The calculation is carried out using Fourier series in complex form and approximate boundary conditions on the surface of ferromagnetic molds. The approximate boundary conditions avoid the need to calculate the electromagnetic field in a nonlinear ferromagnetic medium. In the heated object, the energy of the induced alternating electric field is irreversibly converted into thermal energy. This dissipation of thermal energy, which leads to the heating of the object, is determined by the presence of conduction currents (eddy currents). Induction heating is widely used in metallurgy for melting, heating and mixing of electrically conductive bodies. The method is based on the absorption of electromagnetic energy by bodies of an alternating magnetic field created by an inductor. The heated product is located in the immediate vicinity of the inductor. There are many publications on analytical and numerical, analysis of physical processes in the inductor-heated billet system. In this paper, an analytical calculation of electromagnetic processes in the system of inductor – ferromagnetic molds of the filling conveyor is carried out. The analytical solution is obtained by using the approximate boundary condition of L. R. Neumann on the surface of nonlinear ferromagnetic molds

Pages

583–589

DOI

10.17516/1999-494X-0335

Paper at repository of SibFU

https://elib.sfu-kras.ru/handle/2311/143416

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).