DOI: 10.52150/2522-9117-2024-38-253-264
Semykin Serhii Ivanovych, Ph. D. (Tech.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. ORCID: 0000-0002-7365-2259. E-mail: isisemykin@gmail.com
Golub Tetiana Serhiivna, Ph. D. (Tech.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. ORCID: 0000-0001-9269-2953. E-mail: isinasu.golubts@gmail.com
Dudchenko Serhiy Oleksandrovych, Ph. D. (Tech.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. ORCID: 0000-0002-7319-9896. Email: s.dudchenko@meta.ua
Vakulchuk Volodymyr Viktorovych, Ph. D. (Tech.), Senior Researcher, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. ORCID: 0000-0001-7887-2843. Email: vvvakulchuk@gmail.com
Prokopenko Pavlo Hryhorovych, Chief Metrologist, Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Academican Starodubova Square, 1, Dnipro, 49107, Ukraine. E-mail: ogm-ichm@ukr.net
STUDY OF THE PATTERNS OF OZONE GENERATION USING THE TOP OXYGEN LANCE UNDER VARIOUS TECHNOLOGICAL BLOWING CONDITIONS
Abstract. The basic oxygen furnace process of smelting iron-carbon intermediate product is an important stage in the production of steels of various grades. The heart of this process is the top oxygen blowing, which ensures the processing of cast iron into steel. It is largely responsible for the technological and quality indicators of both the process itself and the result – the liquid metal intermediate product. Despite the sufficient time of existence of the process and the different depth of its research, rapid changes in technological and environmental indicators of modernity determine the constantly high relevance of developments that, without significant capital investments, will allow to intensify the converting process without losing other important technological indicators. Among these is the idea of using ozone as an admixture to the main oxygen flow, the molecules of which are more active oxidants. The paper presents the results of a full-scale physical bench study of the features of ozone generation by a high-voltage brush-type electric discharge when blowing through the top oxygen lance with one nozzle depending on the technological parameters of the blowout: the pressure of the blowout gas, the type of insulation on the electrodes, and the length of the discharge gap. The ozone productivity was chosen as the indicator, which was determined at a certain point of the oxygen jet by measuring its concentration using a special gas analyzer. An important feature is that the discharge was created directly at the outlet of the blowout lance to create the largest amount of ozone in the gas flow. Analysis of the obtained research results allowed us to establish that the ozone generation productivity nonlinearly depends on the pressure of the blowout gas and the size of the discharge gap between the electrodes that create the high-voltage discharge. The maxima correspond to a pressure of 0.15 MPa and a discharge gap length of approximately 3 calibers of the blowout nozzle. Also, ceramic insulation has the best ozone generation performance, that probably additionally produces ozone on its surface. The proposed method can be used to activate exchange processes during basic oxygen furnace process.
Key words: ozone, oxygen blowing, gas jet, high-voltage discharge, insulation.
DOI: https://doi.org/10.52150/2522-9117-2024-38-253-264
For citation: Semykin, S. I., Golub, T. S., Dudchenko, S. O., Vakulchuk, V. V., & Prokopenko, P. H. (2024). Study of the patterns of ozone generation using the top oxygen lance under various technological blowing conditions. Fundamental and applied problems of ferrous metallurgy, 38, 253-264. https://doi.org/10.52150/2522-9117-2024-38-253-264
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