Abstract <p>A three-stage technological scheme is proposed to produce qualified ferrosilicomanganese from a low-grade ferruginous manganese ore. At the first stage, selective solid-phase reduction of iron with hydrogen is carried out. Then, after separation melting of the ore metallization products to form a by-product metal and a manganese-containing slag, manganese and silicon are reduced from the slag with carbon to form ferrosilicomanganese. The results of thermodynamic modeling of the process of reducing manganese and silicon from a high-manganese slag are presented. Manganese monoxide is shown to react with silicon dioxide in the slag to form the Mn₂SiO₄ tephroite. Upon heating above 1750 K, the reduction of manganese from this compound is found to begin. As the temperature increases to 1800 K, manganese and silicon form the metallic Mn₅Si₃ phase. On further heating, the amount of manganese in a gas phase increases. Experimental results on producing ferrosilicomanganese from a slag after separation melting are presented. The possibility of producing ferrosilicomanganese without harmful impurities is shown. The synthesized alloy contains 9.29 wt % silicon, 48.72 wt % manganese, and iron for balance. However, a significant amount of manganese (25.89 wt %) is retained in the slag phase, indicating its incomplete reduction. The results obtained can be used in developing theoretical and technological foundations for processing ferruginous manganese ores with a high phosphorus content, which cannot be processed by the existing technologies.</p>