«Metallurgical Plant «Electrostal» (Elektrosral, Russia)

Shilnikov E. V., General Director, e-mail: info@elsteel.ru

Automatic holding of permanent and increased oxygen pressure in oxygen pipeline, permanent speed of oxygen injection in the furnace during all melting operations, increased temperature conditions for oxidizing melting period have increased oxidation speed for the components of alloyed melts. 4 pilot melting operations have been conducted in 20-t electric arc furnace for revealing of kinetic regularities and constants in varied technological conditions. As a result, metal samples have been taken and bath temperature have been measured in the beginning, in the middle part and in the end of melting oxidizing stage. Kinetic equations of C, Si, Mn and Cr oxidation were proposed and kinetic parameters were established. The algorithm of calculated prediction of oxidizing period duration at each future melt of stainless steel was elaborated using kinetic equations and parameters. These kinetic regularities and decarbonization constants have been used for prediction of duration of oxidizing period of future melting operations of 08Kh18N10T (08Х18Н10Т) steel.

1. Shilnikov E. V., Paderin S. N. Termodinamicheskiy analiz okislitelnykh reaktsiy pri vyplavke legirovannoy stali (Thermodynamic analysis of oxidation reactions during alloyed steel smelting). Elektrometallurgiya = Electrical Metallurgy. 2010. No. 12. pp. 29-34.
2. Shilnikov E. V., Paderin S. N. Kislorod v tekhnologii vyplavki vysokolegirovannoy stali. Monografiya (Oxygen of high-alloyed steel smelting technology. Monograph). Moscow, 2012. 141 p.
3. Filippov S. I. Teoriya protsessa obezuglerozhivaniya stali (Theory of steel decarbonization process). Moscow : Metallurgiya, 1966. 279 p.
4. Paderin S. N., Filippov V. V. Teoriya i raschety metallurgicheskikh sistem i protsessov (Theory and calculations of metallurgical systems and processes). Moscow : MISiS, 2002. 333 p.