Composition of some iron ores and possibility to use them in the cement production (western region of Mongolia)

Chemical and mineral compositions of some iron ores in the Mongolian western region were studied. Also the effect of calcium fluoride on decomposition temperatures of calcite in the raw mix to obtain cement clinker was investigated. The results showed that iron oxide in iron ores of western Mongolian constitutes 87.23% in Uvgondatsan ( Khovd), 85.00% in Suul Лhar (Khovd) and 89.29% in Khargant (Uvs). Iron ores of "Kharganat" and "Uvgundatsan " mostly contain magnetite while iron ore of "Suul Khar" -hematite. The decomposition temperature of calcite was reduced at 5, 10 and 15 oC when calcium fluoride from the raw mix obtaining cement clinkers of "Shokhoit" limestone, "Shal" clay and "Kharganat" iron ore with 0.5%, 1.0% and 1.5% additives.