The paper is devoted to the analysis of a supersonic nozzle system effect in gas-cooled lances on the technological parameters of slag splashing in an oxygen converter. Simulation calculations were carried out, taking into account the parameters of nozzles used in the technological lines of converter steel plants in Ukraine and Brazil. The problems were solved in several stages. The simulation results of the first stage revealed the influence of different nozzle diameters dcr, dex and the inlet pressure before nozzle P0 on the nitrogen consumption of one nozzle Vн. Calculations also showed the influence of the critical dcr and output dex of the nozzle diameter and nitrogen flow through one nozzle Vн on the power of injected nitrogen N1 and the depth of penetration of the stream hx into the liquid slag. The second stage was dedicated to numerical simulation of the slag splashing process, including an array of results from the first stage. The thermodynamic and physical parameters were calculated using our own computer program, while 3D simulations were conducted using the ANSYS Fluent 2023 R2 program.

Cement Research Group Łukasiewicz Research Network Institute of Ceramics and Building Materials Cementowa Str 8 31 983 Krakow Poland

Department of Chemistry and Corrosion of Metals Faculty of Foundry Engineering AGH University of Science and Technology Al A Mickiewicza 30 30 059 Krakow Poland

Department of Machine Parts and Mechanism Faculty of Mechanical Engineering Technical University of Liberec Studentská Str 2 46117 Liberec Czech Republic

Department of Materials Technology and Production Systems Faculty of Mechanical Engineering Lodz University of Technology Stefanowskiego Str 1 15 90 537 Lodz Poland

Department of Power Engineering Equipment Faculty of Mechanical Engineering Technical University of Liberec Studentská Str 2 46117 Liberec Czech Republic

Institute of Materials Science and Engineering Faculty of Mechanical Engineering Lodz University of Technology Stefanowskiego Str 1 15 90 537 Lodz Poland

Lumar Metals Rodovia MG 232 km 09 70 Santana do Paraíso 35167 000 MG Brazil

Polytechnic Faculty University of Kalisz Nowy Świat Str 4 62 800 Kalisz Poland

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