Sintering of Calcined Dolomite

The sintering of dolomite is primarily of commercial interest in connection with the manufacture of refractory products with mean apparent densities in excess of 3.0g/cm. This involves heating calcined dolomite at temperatures of 1400 to 1800 °C [15.17]. The sintering process is affected by grain size and crystallite size, but the predominant factor is the amount of impurities present with fluxing properties. Iron oxide has a particularly pronounced influence on the rate and extent of sintering [15.18-15.23]. 

Certain grades of sintered dolomite are produced by blending ground, calcined dolomite with about 0.5 % of finely divided ferric oxide, and heating the mixture at temperatures of up to 1600 °C. 

---