Influence of the physicochemical properties of coal on the reduction of manganese and silicon from oxides

Abstract

Russian ferroalloy plants, faced with a shortage of coking coal, need to find alternative carbon sources. The influence of the physicochemical properties of long flame coal and lignite on the reduction of silicon and manganese is investigated. Thanks to the volatile components liberated on heating the coal, solid phase reduction of the higher oxides of manganese occurs at lower temperatures, which hastens reduction. Development of the specific surface of the pyrolytic residue from the coal facilitates the reduction of silicon.

Production of complex Fe-Si-Mn-Cr ferroalloy using high-ash coal: a sustainable metallurgical approach

“…It is imperative to acknowledge that the reduction of ferroalloy components under actual conditions may deviate due to the characteristics of the coal used. In study [19], the authors determined that the volatile compounds released during coal heating shift the solid-phase reduction of higher Mn oxides to lower temperature zones, and the structure of the coal's pyrolytic residue aids in Si reduction.…”