Siberian Federal University, Krasnoyarsk, Russia:

E. A. Golovenko, Assistant Professor, e-mail: info@ontecom.com
V. A. Goremykin, Post-Graduate Student

Group of Companies ONTECOM, Krasnoyarsk, Russia.
E. S. Kinev, Chief Researcher
A. S. Khronik, Chief Designer
D. V. Khokhlov, Chief Engineer

This work considers the results of development of a liquid alloy electromagnetic stirring (EMS) technology for preparation of aluminum alloys in furnaces. As part of study, the EMS unit was improved: its mass and dimension were lowered and the energy efficiency was increased. Moreover, some recommendations on operating modes, increasing the processing efficiency of the mixers and the performance of the furnaces, were issued. The positive technological result of the project was achieved due to the new technical solutions for the side and bottom EMS modes, selected not by the furnace dimension size, but by the working gap width. The practical improvements were introduced after a thorough analysis and summarizing of computational modeling results, received with the help of ANSYS software for non-stationary magnetohydrodynamic processes for the developed method of obtaining of high-quality aluminum alloys in furnaces and mixers with several coordinated EMS units. A series of linear induction machines with air-cooling, including electromechanical elevators and microcontroller system, was designed for implementation of the mixers on high-capacity furnaces. Mixer power supply is based on a standard three-phase frequency converter for provision of stability in the significantly asymmetric operation regime. The complex includes specially designed equipment and foresees some measures for provision of electromagnetic compatibility with the automatic systems, control and protection systems of the furnace.

1. Ch. Schmitz, J. Domagala, P. Haag. Retsikling alyuminiya : spravochnik (Handbook of aluminium recycling). Moscow : ALUSIL MViT, 2008. 528 p.
2. Sjoden O., Lehman A., Stal R. Razrabotki v oblasti elektromagnitnogo peremeshivaniya (EMP) rasplava v pechakh dlya plavki alyuminiya (Developments in the area of electromagnetic mixing of melt in aluminium smelting furnaces). Alyuminiy-21/ Retsikling : materialy pyatoy Mezhdunarodnoy konferentsii i vystavki (Aluminium-21/Recycling : materials of the 5-th international conference and exhibition). Saint Petersburg, 2010.
3. Peel A. Technology for electromagnetic stirring of aluminum reverberatory furnaces. Light Metals. Warrendale : The Minerals, Metals & Materials Society, 2011. pp. 1193–1198.
4. Edem M., Henriksson P., Karlsson L., Nordekvist L., Oscarsson P. et al. Furnаce plant. Patent US, No. 5936996. Published : August 10, 1999.
5. Elektrotermicheskoe oborudovanie : spravochnik (Electrothermal equipment : reference book). Under the general editorship of A. P. Altgauzen, second edition, revised and enlarged. Moscow : Energiya, 1980. 416 p.
6. Mishchenko V. D., Mikelson A. E., Krumin Yu. K. Tekhnologiya elektromagnitnogo transportirovaniya legkikh splavov (Technology of electromagnetic transporting of light alloys). Moscow : Metallurgiya, 1980. 128 p.
7. Stal R., Sand U., Hjortstam. Establishing operational parameters of Al-EMS using numerical simulations to promote energy efficiency during final heating in aluminum furnaces. Light Metals. Warrendale : The Minerals, Metals & Materials Society, 2010. pp. 657–661.
8. Matsuzaki K., Shimizu T., Murakoshi Y., Takahashi K. Evaluation of effects of stirring in a melting furnace for aluminum. Light Metals. Warrendale : The Minerals, Metals & Materials Society, 2011. pp. 1199–1203.