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Information × Registration Number 0225U000169, (0124U000108) , R & D reports Title Improvement of the calculation method for evaluating the effectiveness of the use of ferroalloys in the alloying and finishing of mass steel popup.stage_title Удосконалення алгоритму, математичної моделі та програмного забезпечення для оцінки ефективності процесів легування та доведення сталі в ковші; використання вдосконаленої програми математичної моделі для дослідження і оцінки впливу змінних чинників і, перш за все маси феросплаву, на ефективність процесів легування та доведення сталі. Вдосконалення методу і розробка критеріїв оцінки ефективності легування та доведення сталі.. Підготовка розробок до експериментальної перевірки та аналіз результатів роботи. Підготовка звіту. Head Piptiuk Vitalii P., Кандидат технічних наук Registration Date 06-01-2025 Organization Institute of Ferrous Metallurgy. ZI Nekrasov of the National Academy of Sciences of Ukraine popup.description1 Improvement of the developed method of evaluating the effectiveness of the use of ferroalloys for alloying and tempering of mass and special-purpose steel during out-of-bake processing. popup.description2  The investigated technology of metal processing on a ladle-furnace unit (LFU) with the use of lump additives for the purpose of alloying and finishing with simultaneous bottom blowing of the melt with argon. Numerical and experimental methods are used, mathematical models that take into account the mass of the additive are developed and applied. The models take into account the dynamic influence of solid additives that are introduced into the bath, as well as the change in the temperature of the melt in the contact zone of the metal melt with the additive material. The effect of the mass of the FMn78 additive (0.2-3.0 kg/t) on the hydrodynamics of the melt in 60 and 250t ladles at different purging intensities was evaluated. It has been established that the hydrodynamics in the ladles of the considered capacity when feeding the ferroalloy at the places of its introduction changes significantly (flow directions and velocities change), which determines the location of the additive in the melt and its further dynamics after introduction. It was determined that the mass of the additive affects the temperature gradient of the liquid metal in the zone of contact of the melt with the material of the additive at the time of the introduction of the latter and the length of time it stays in the melt in a solid state. The influence of the amount of additive on the value of the coefficient of variation in the content of the leading element of the additive material in the bath and its dependence on the duration of the observed processes, the capacity of the bath and the intensity of its purging with argon have been established. Ensuring the necessary homogeneity of the metal due to its mixing with argon (coefficient of variation of about 1%) is achieved 5 minutes after the introduction of additives. The expediency of taking into account the amount of the additive as a factor of influence on the efficiency of its use in steel processing processes at the LFU has been determined. Product Description popup.authors Vakulchuk Volodymyr V. Hrekov Stanislav V. Dudchenko Serhii O. Kakushkin Yevhenii S. Kuksa Oleh V. Piptiuk Vitalii P. Povorotnia Iryna R. Samokhvalov Serhii Ye. Tohobytska Daria M. Khodotova Nadiia Ye. popup.nrat_date 2025-01-06 Close