2411-3336 2541-9404 Записки Горного института Journal of Mining Institute Санкт-Петербургский горный университет императрицы Екатерины ΙΙ Empress Catherine II Saint Petersburg Mining University 10.31897/PMI.2022.18 pmi-14695 https://pmi.spmi.ru/pmi/article/view/14695 Геотехнология и инженерная геология Geotechnical Engineering and Engineering Geology Study of the kinetics of the process of producing pellets from red mud in a hydrogen flow Изучение особенностей кинетики процесса получения окатышей из красного шлама в потоке водорода Khalifa Akhmed A. Халифа А. А. Khalifa Akhmed A. s175001@stud.spmi.ru 0000-0003-3092-1516 Санкт-Петербургский горный университет (Россия) Saint Petersburg Mining University (Russia) Bazhin Vladimir Yu. Бажин В. Ю. Bazhin Vladimir Yu. pmi@mail.ru 0000-0001-8231-3833 Санкт-Петербургский горный университет (Россия) Saint Petersburg Mining University (Russia) Ustinova Yana V. Устинова Я. В. Ustinova Yana V. pmi@mail.ru 0000-0002-4382-3301 Санкт-Петербургский горный университет (Россия) Saint Petersburg Mining University (Russia) Shalabi Mokhamed E. Шалаби М. Э. Shalabi Mokhamed E. pmi@mail.ru Центральный научно-исследовательский металлургический институт (Египет) Central Metallurgical Research and Development Institute (Egypt) 27 05 2022 2022 254 261 270 24 02 2021 06 04 2022 13 07 2022 © 2022 А. А. Халифа, В. Ю. Бажин, Я. В. Устинова, М. Э. Шалаби © 2022 Akhmed A. Khalifa, Vladimir Yu. Bazhin, Yana V. Ustinova, Mokhamed E. Shalabi 2022 А. А. Халифа, В. Ю. Бажин, Я. В. Устинова, М. Э. Шалаби Akhmed A. Khalifa, Vladimir Yu. Bazhin, Yana V. Ustinova, Mokhamed E. Shalabi Эта статья доступна по лицензии Creative Commons Attribution 4.0 International (CC BY 4.0) This article is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0) https://pmi.spmi.ru/pmi/article/view/14695

Изучена и обоснована кинетика восстановления последовательных фазовых переходов оксидов железа при восстановлении до металлизированного состояния с различными режимами подачи технического водорода. Представлены результаты образования окатышей при добавлении к красному шламу в качестве связующего реагента 3-5 % мелассы. Получены зависимости скорости восстановления оксидов железа от скорости водородного потока. По результатам экспериментов построена кинетическая модель, а при помощи рентгенофазового и спектрального анализа доказано, что образующиеся после термической обработки агломераты получили высокую прочность за счет сцепления частиц восстановленного железа с частицами красного шлама. Использование шихтовых материалов нового типа в плавильных агрегатах позволит снизить количество выбросов и пылевидных фракций, а также увеличит выход годного металла.

The reduction kinetics of serial phase transitions of iron oxides during reduction to a metallized state with different modes of technical hydrogen supply has been studied and substantiated. The results of the pellets formation when 3-5 % molasses is added to the red mud as a binding reagent are presented. The dependences of the reduction rate of iron oxides on the hydrogen flow rate are obtained. Based on the results of the experiments, a kinetic model was constructed, and with the help of X-ray phase and spectral analysis, it was proved that the agglomerates formed after heat treatment received high strength due to the adhesion of reduced iron particles with red mud particles. The use of a new type of charge materials in melting units will reduce the amount of emissions and dust fractions, as well as increase the metal yield.

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