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Information × Registration Number 0225U000564, (0124U001695) , R & D reports Title Development and research of a method of oxidizing melt blowing in a ladle during the production of low-carbon steels popup.stage_title В роботі буде уточнено закономірності окислення вуглецю в розплаві при продувці сумішшю нейтральний газ-кисень, що буде здійснюватися у ковші та обґрунтовано раціональні технічні режими зазначеного процесу і конструктивні особливості устаткування для його здійснення. Head Molchanov Lavr , Кандидат технічних наук Registration Date 14-01-2025 Organization Institute of Ferrous Metallurgy. ZI Nekrasov of the National Academy of Sciences of Ukraine popup.description1 Development of a technical solution for the oxidizing blowdown of the melt in the ladle. popup.description2  Low-carbon steels have important performance characteristics for mechanical engineering and other sectors of the economy. However, their production is associated with the difficulty of oxidizing carbon to levels below 0.01% without significant metal loss due to overoxidation. Therefore, the urgent task is to create methods of decarbonization to achieve the given task with minimal costs. One of the options for achieving the goal can be a two-stage steel smelting: first blowing in an oxygen converter to a carbon concentration of 0.1%, and then subsequent processing of the melt in a steel ladle by means of bottom purging with a mixture of oxygen gases - neutral gas in bubble mode. In the work, development and physical research was carried out on cold and high-temperature models of the second stage of the specified chain - bottom purging of the steel melt in the ladle with a mixture of gases containing oxygen, that will additionally reduce the probability of metal reoxidation and the formation of non-metallic inclusions in the melt. According to the results of the work, the thermodynamic priority of carbon oxidation to CO in the bottom variant of purging was established. The rational design of the bottom blowing unit with slotted and non-directed porosity was determined and the angle of inclination of the channels in the pre-mixing chamber of oxygen and neutral gas was set at 25-40o to the vertical axis. It was established that at a purging intensity of 1m3/t∙h - that for the industrial version of the proposed method in a 250-t ladle is 0.286 m3/t∙h (a 20% increase in consumption compared to the classical version) the formation of tangential flows is observed, which pulsate and involve a 52% more part of the bath to mixing than in the mode corresponding to the classic processing option and on 42.2% shortens the time to achieve mixing in the bath. Based on the results of high-temperature modeling, it was determined that under the conditions of blowing steel with a carbo Product Description popup.authors Arendach Natalia A. Vakulchuk Volodymyr V. Holub Tetiana S. Dudchenko Serhii O. Kakushkin Yevhenii S. Koveria Andrii S. Molchanov Lavr S. Semykin Serhii I. Semykina Anna S. Cherniatevych Anatolii H. Yushkevych Pavlo O. popup.nrat_date 2025-01-14 Close