Evaluation of Influence of Briquetted Synthetic Slags on Slag Regime and Process of Steel Desulphurization

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Abstract

This paper presents the industrial results of evaluation of efficiency of synthetic slags during the treatment of steel at the equipment of the secondary metallurgy under conditions of the steel plant VÍTKOVICE HEAVY MACHINERY a.s. The aim of the heats was to assess the influence of the briquetted and sintered synthetic slags based on Al2O3 aiming the course of the steel desulphurization and slag regime during the production and treatment of steel grade 42CrMo4 with the technology EAF→LF→ VD. Within the plant experiments, basic parameters influencing the steel desulphurization and slag regime were monitored: desulphurization degree, basicity, content of easily reducible oxides, proportion of CaO/Al2O3 and Mannesmann’s index. Obtained results allowed to compare the steel desulphurization and to evaluate the slag regime. It was proved that the synthetic slag presenting the briquetted mixture of secondary corundum raw materials can adequately replace the synthetic slag created from the sintered mixture of natural raw materials.

[1] A. Ghost, A. Chatterjee, Ironmaking and Steelmaking: Theory and Practice. PHI Learning Private limited 472 (2008).

[2] R.J. Frueha n, The Making, Shaping and Treating of Steel. Pittsburgh: AISE Steel Foundation 768 (2010).

[3] K. Michalek, L. Čamek, K. Gryc, M. Tkadlečková, T. Huczala, V. Troszo k, Desulphurization of the High-alloy and Middle-alloy Steels under the Conditions of an EAFby means of Synthetic Slag based on Ca O-Al2O3, Materiali in Tehnologije 46 (3), 297-303 (2012).

[4] R. Dudek, S. Rosypalová, J. Dobrovská, Influence of Temperature and Chemical Composition on Phase Transformations of Selected Oxide Melts, Metalurgija 52 (3), 297-300 (2013).

[5] K. Gryc, K. Stránský, K. Michalek, Z. Winkler, J. Morávka, M. Tkadlečková, L. Socha, J. Bažan, J. Dobrovská, S. Zlá, A Study of the High-Temperature Interaction between Synthetic Slags and Steel, Materiali in Tehnologije 46 (3), 59-62 (2012).

[6] L. Socha, J. Bažan, P. Styrnal, Research and development concept of fluxing agents based on corundum raw materials for secondary metallurgy, Acta Metallurgica Slovaca - Conference 113-116 (2010).

[7] K. Michalek, L. Čamek, Z. Piegza, V. Pilka, J. Morávk a, Use of Industrially Produced Synthetic Slag at Třineckéželezárny, a.s. Archives of Metallurgy and Materials 55 (4), 1159-1165 (2010).

[8] L. Socha, J. Bažan, P. Machovčák, A. Opler, P. Styrnal, J. Melecký, Influence of Briquetting Fluxing Agents on Desulphurization of Steel during Secondary Metallurgy Treatment, Hutnické listy 65 (2), 8-13, (2012) (in Czech).

[9] L. Socha, J. Bažan, K. Gryc, P. Machovčák, A. Opler, A. Trefil, P. Styrnal, J. Meleck ý, Evaluation of Slag Regime in Ladle during Utilization of Briquetted Synthetic Slag in VHMa.s. Archives of Materials Science and Engineering 57 (2), 80-87 (2012).

[10] http://www.vitkovicemachinery.com

[11] M. Tkadlečková, P. Machovčák, K. Gryc, K. Michalek, L. Socha, P. Klus, Numerical Modelling of Macrosegregation in Heavy Steel Ingot, Archives of Metallurgy and Materials 58 (1), 171-177 (2012).

[12] B. Buĺko, J. Kijac, M. Domec, Optimalization Slag Composition in Ladle Furnace Considering to Effective Steel Desulfurization, Acta Metallurgica Slovaca 15 (2), 93-99 (2009).

[13] M. Allibert, Slag Atlas. 2nd Edition, D¨usseldorf: Verein Stahleisen Gmb H 616 (1995).

Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

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