On the technology of processing of manganese wastes from ore concentration: metallization of granulated manganese pellets via low-temperature roasting
Dosmukhamedov N.K. Tazhiev E.B. Zholdasbay E.E. Kurmanseitov M.B.
2025Ore and Metals Publishing house
CIS Iron and Steel Review
2025#29102 - 107 pp.
The proposed technology for processing of manganese-containing wastes from ore concentration represents a new approach to obtaining low-carbon ferromanganese from wastes. Based on the detailed comprehensive studies of two interrelated stages of the common technology (preparation of granulated pellets from a charge of preset composi tion and their consequent processing via low-temperature roasting), possibility of obtaining metallized granulated pellets is shown in this research. The main regularities of iron and manganese reduction during roasting within the temperature range 773–1800 K are established. Based on the comprehensive analytical studies of the material com position and forms of manganese, which were carried out using X-ray phase analysis, scanning electron microscopy and gas chromatography, step-by-step quality control of the products obtained during implementation of the tech nological cycle of low-temperature roasting is ensured. It was found out that beginning of abundant CO release in the gas phase under conditions of low-temperature roasting is achieved at a temperature ~1373 K. Temperature rise increases the CO content in the gas phase. Maximal CO content in the gas phase is 94 % CO, it was reached at the temperature of ~1473 K. It is displayed that increase of CO content in the gas phase is mainly determined by the course of reactions of wustite and magnetite reduction by carbon. Mn3O4 reduction reaction is hindered due to the high chemical strength of the oxide. It is indicated that higher roasting temperatures (~1773 K) are required to in tensify reduction of strong manganese oxides (Mn3O4, MnO) by solid carbon. As a result of low-temperature roast ing of granulated manganese pellets, metallized pellets with content of 23.67 % Fegen.; 23.2 % FeMe; 0.7 % MnMe; 28.47 % MnO; 5.0 % C etc. were obtained.
carbon , Gibbs energy , granulation , low-temperature roasting , manganese wastes , metallized manganese pellets , mono-charge , temperature , thermodynamic analysis
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Satbaev University, Almaty, Kazakhstan
Zhezkazgan University named after O. Baikonurov, Zhezkazgan, Kazakhstan
Satbaev University
Zhezkazgan University named after O. Baikonurov
10 лет помогаем публиковать статьи Международный издатель
Книга Публикация научной статьи Волощук 2026 Book Publication of a scientific article 2026