South Ural State University, Chelyabinsk, Russia
N. Y. Kosdauletov, Researcher of the Research Laboratory “Hydrogen Technologies in Metallurgy”
A. V. Roshchin, Dr. Eng., Associate Prof., Leading Researcher, Dept. of Pyrometallurgical and Foundry Technologies
V. E. Roshchin, Dr. Eng. Prof., Chief Researcher of the Research Laboratory "Hydrogen Technologies in Metallurgy", e-mail: roshchinve@susu.ru

The results of solid-phase reduction with hydrogen of components from manganese ores of different genesis, differing in the content of manganese, iron and phosphorus oxides, are pre-sented. Rich manganese ore (Brazil), concentrate from the Zhayremsky mining and processing plant (Kazakhstan) with a high iron content, and ferromanganese ore from the Selezensky deposit (Russia), characterized by a relatively high content of iron and phosphorus, were used as the starting material. Experiments on the joint selective solid-phase reduction of iron and phosphorus in all three ore materials were carried out simultaneously under the same conditions in a vertical furnace MM 6000 from RBAutomazione. During the reduction process, the furnace reactor was purged with hydrogen at a temperature of 800 or 900 °C for 20 or 30 min at a hydrogen flow rate of 5 l/min. The possibility of selective extraction of iron or joint reduction of iron and phosphorus to a metallic state has been established. At the temperature of 800 °C only iron passes into the metal form, and with an increase in temperature to 900 °C – iron and phosphorus. In both cases, in all three ores, higher manganese oxides are reduced to manganese monoxide and remain in the oxide phase. After separating the products of reduction roasting of ferromanganese ore from the Selezen deposit, slag with a high (35 %) manganese content and metal (iron) alloyed with phosphorus, cobalt, copper and nickel with a low (0.5 %) manganese content were obtained by melting. The results of the work can be used when developing theoretical and technological foundations for processing ferromanganese ores with a high phosphorus content, which are not processed by existing technologies.
The study was carried out with financial support from the Ministry of Science and Higher Education of the Russian Federation (state assignment for fundamental scientific research No. FENU-2023-0011 (2023011ГЗ)).

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