Preview

Advanced Engineering Research (Rostov-on-Don)

Advanced search

Development of methods and algorithms for parameter estimation system of decarburization and combustible gas afterburning modes in an electric arc furnace

https://doi.org/10.23947/1992-5980-2017-17-2-99-107

Abstract

Introduction. Currently, in the Russian metallurgy, waste-gas heat under steelmaking in the electric arc furnace (EAF) is used inefficiently. This determines the urgency of the task to develop methods for СО to СО2 afterburning degree control under steelmaking in the EAF. Materials and Methods . A mathematical model of the decarburization and combustible gas afterburning modes under the reduced pellets electrosmelting at their continuous feed to the EAF bath is used to solve the problem. The proposed model allows estimating the mode parameters of the decarburization and combustible gas afterburning in the electric arc furnace. The role of the rate of carbon oxidation components in the common mode of decarburization and gas afterburning in the EAF is studied. Research Results . The possibility and efficiency of the CO afterburning by the oxygen beams in the counter gas flow system is experimentally confirmed. This allows accelerate the processes of metal heating and decarburization, as well as improve other technological parameters of the steel electrosmelting. Discussion and Conclusions . The mathematical modeling results show that a new method of supplying oxygen through the oxyfuel burners and the oxygen lance provides an increase in the energy efficiency of the steel electrosmelting in the electric arc furnace.

About the Authors

Eduard E. Merker
Stary Oskol Technological Institute
Russian Federation


Victor A. Stepanov
Stary Oskol Technological Institute
Russian Federation


Lyudmila N. Krakht
Stary Oskol Technological Institute
Russian Federation


Alexander Yu. Kem
Don State Technical University
Russian Federation


References

1. Gudim, Yu.A., Zinurov, I.Yu., Kiselev, A.D., Shumakov, A.M. Sposoby intensifikatsii plavki v dugovykh pechakh. [Rational methods of intensification of electric smelting in modern arc steelmaking furnaces.] Elektrometallurgiya, 2005, no. 9, pp. 2–6 (in Russian).

2. Kiselev, А.Y., Zinurov, I.Yu., Makarov, D.N., Mamenko, Y.F., Pigin, S.N. Effektivnost' primeneniya gazokislorodnykh gorelok v sovremennykh dugovykh staleplavil'nykh pechakh. [Effectiveness of use of gas-oxygen burners in modern steelmaking EAF. ]Metallurgist, 2006, no. 10, pp. 60–62 (in Russian).

3. Koptsev, V.V., Kazakov, O.V., Gorbulin, V.N. Fizicheskoe modelirovanie aerodinamiki sopla gorelochnogo ustroystva s tsentral'nym telom. [Physical modeling of jet aerodynamics for burner with central body.] Metallurgist, 2007, no. 8, pp. 81–82 (in Russian).

4. Merker, E.E., Karpenko, G.A., Moiseev, I.V. Dugovaya staleplavil'naya pech' s dozhiganiem goryuchikh gazov: patent Ros. Federatsiya. [Arc steel-making furnace with afterburning of combustion gases.] Patent RF, no. 2520883, 2014 (in Russian).

5. Kochnov, M.Y., Schulz, L.A., Kochnov, Y.M. Povyshenie effektivnosti dozhiganiya i okhlazhdeniya tekhnologicheskikh gazov krupnotonnazhnykh dugovykh staleplavil'nykh pechey. [Increase in efficiency of afterburning and cooling of technological gases of large-capacity arc steel-smelting furnaces.] Izvestia. Ferrous Metallurgy. 2009, no. 11, pp. 49–55 (in Russian).

6. Krakht, L.N., at el. Metallizovannye zhelezorudnye okatyshi i povyshenie effektivnosti ikh primeneniya pri elektroplavke stali v dugovoy pechi. [Impact of using metallized iron ore pellets to increase the efficiency of electric arc furnace.] Vestnik of DSTU, 2015, no. 3, pp. 35–40 (in Russian).

7. Lisienko, V.I., Zasukhin, A.L. Sposob dozhiganiya i obespylivaniya otkhodyashchikh gazov elektrodugovykh staleplavil'nykh pechey: patent Ros. Federatsiya. [Method of afterburning and dedusting exhaust gases of electric arc steelmaking furnaces.] Patent RF, no. 2451092, 2010 (in Russian).

8. Merker, E.E., Chermenev, E.A. Matematicheskaya model' obezuglerozhivaniya metalla pri elektroplavke zhelezorudnykh okatyshey v dugovoy pechi. [The mathematical model of metal decarbonizing in electric melting of iron ore pellets in the EAF.] Steel, 2014, no. 3, pp. 28–33 (in Russian).

9. Paderin, S.N., Paderin, E.P. Termodinamika i raschety protsessa glubokogo obezuglerozhivaniya stali. [Thermodynamics and calculations of deep steel decarburization process.] Izvestia. Ferrous Metallurgy. 2005, no. 10, pp. 19–24 (in Russian).

10. Paderin, S.N., Paderin, P.S., Kuzmin, I.V. Termodinamicheskoe modelirovanie okislitel'nykh protsessov pri obezuglerozhivanii stali. [Thermodynamic simulation of oxidation processes during decarburization of steel.] Izvestia. Ferrous Metallurgy. 2003, no. 5, pp. 6–11 (in Russian).

11. Stepanov, V.A., et al. Issledovanie effektivnosti elektroplavki okatyshey v dugovoy pechi pri dozhiganii oksida ugleroda toplivno-kislorodnymi gorelkami. [Research of pellet electrosmelting efficiency in arc furnace under the carbon oxide postcombustion by fuel oxygen burners.] Vestnik of DSTU, 2016, no. 2, pp. 97–104 (in Russian).

12. Logar, V., Dovzan, D., Skrjanc, I. Mathematical modeling and experimental validation of an electric arc furnace. ISIJ International, 2011, vol. 51, no. 3, pp. 382–391.

13. Brooks, G., et al. Optimizing chemical energy into Electric Arc Furnaces. SEAISI Quaterly, 2012, no. 4, pp. 17–22.


Review

For citations:


Merker E.E., Stepanov V.A., Krakht L.N., Kem A.Yu. Development of methods and algorithms for parameter estimation system of decarburization and combustible gas afterburning modes in an electric arc furnace. Vestnik of Don State Technical University. 2017;17(2):99-107. (In Russ.) https://doi.org/10.23947/1992-5980-2017-17-2-99-107

Views: 548


Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.


ISSN 2687-1653 (Online)