Naturally occurring mineral consisting mainly of calcium-magnesium carbonate (Ca, Mg) CO3 used as a flux in steel plants or a refractory in basic steel making furnaces after calcination (high temperature firing or dead burning). High purity dolomite is greater than 97% CaO + MgO and 0.5-3% impurities (mostly silica, iron oxide and alumina). Dolomite is also used to add magnesium oxide to the sinter.
Dolomite
