Siberian State Industrial University, Novokuznetsk, Russia

A. A. Umanskiy, Dr. Eng., Associate Prof., Director of the Institute of Metallurgy and Materials Science, e-mail: umanskii@bk.ru
L. V. Dumova, Cand. Eng., Senior Lecturer, Dept. of Management and Territorial Development, e-mail: doumova@bk.ru
R. A. Shevchenko, Cand. Eng., Associate Prof., Dept. of Ferrous Metallurgy and Chemical Engineering, e-mail: shefn1200@mail.ru
D. T. Feyler, Leading Engineer, Dept. of Ferrous Metallurgy and Chemical Engineering, e-mail: feyler_dt@sibsiu.ru

The patterns of the effect of the intensity of gas injection on the efficiency of metal mixing under various modes of gas jet outflow have been determined via modeling the bottom blowing of rail steel with an inert gas during ladle treatment in a ladle furnace unit. The nature and degree of influence of the intensity of blowing of the rail steel in the ladle through the bottom tuyeres on the mixing power and the effective diffusion coefficient in various directions of transport has been established. The obtained regularities were used in the development of a new mode of rail steel mixing in a ladle furnace with a dedicated period of increased intensity of gas injection through bottom tuyeres, the use of which makes it possible to increase the efficiency of removing non-metallic inclusions during ladle furnace treatment by intensifying mixing of the melt. The experimental and industrial testing of the developed mode of rail steel blowing in the ladle with inert gas in the conditions of the operating electric steel-making shop confirmed its effectiveness. Reduction of rejection of rails produced from steel processed under the new procedure in the ladle furnace was established, it is caused by presence of non-metallic inclusions.
The study was supported by the grant of the Russian Science Foundation No. 25-29-00415, https://rscf.ru/project/25-29-00415/.

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