Analysis of the Influence of Different Diameters of De Laval Supersonic Nozzles on the Key Splashing Parameters of Remaining Slag.

Abstract

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 <i>d_cr</i>, <i>d_ex</i> and the inlet pressure before nozzle <i>P</i>₀ on the nitrogen consumption of one nozzle <i>V_н</i>. Calculations also showed the influence of the critical <i>d_cr</i> and output <i>d_ex</i> of the nozzle diameter and nitrogen flow through one nozzle <i>V_н</i> on the power of injected nitrogen <i>N</i>₁ and the depth of penetration of the stream <i>h_x</i> 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.