METHOD OF OBTAINING POROUS GLASS MATERIAL WITH LOW CONTENT OF MANGANESE FROM POOR AND HIGHLY PHOSPHOROUS MANGANESE ORES Russian patent published in 2009 - IPC C03C11/00 

FIELD: chemistry.

SUBSTANCE: invention relates to processing of manganese-bearing materials in order to obtain porous glass material. Melted is charge of the following composition, wt %: SiO₂-32.5; CaO-6.86; Al₂O₃-10.75; MgO-2.52; Fe₂O₃-21.16; MnO-22.4; P₂O₅-0.9; K₂O-1.0; TiO₂-0.38; ZnO-0.57; BaO-0.62; Cr₂O₃-0.15; CoO-0.06; NiO - 0.13 with carbon content to 0.5 wt % over 100% in slightly reducing medium, with ratio SiO₂/CaO=4.74 and at temperature1300°C. Separation of melt and removal of metal highly phosphorous iron-based part of melt take place. In remaining melt carbon content is brought to 12 wt % over 100% with coal in order to create strongly reducing medium and ratio SiO₂/CaO - to 0.6 with limestone. Temperature is raised to 1600°C, melting is carried out until silicon carbide is formed and melt is separated into metal and silicate parts. Low-phosphorous ferromanganese is removed and silicate part of melt is cooled by thermal impact in order to obtain glass material.

EFFECT: obtaining porous glass material with low content of manganese from manganese-bearing ores.

1 ex