tulekindel materjal MgO sisaldusega 10-50 % ja CaO sisaldusega 45 -85 % (vt dolomiit), a refractory made substantially or entirely of dead-burned dolomite - raw dolomite sintered in duoble-pass sinterng process to form CaO and MgO in a matrix resistant to hydration and recombination with carbon dioxide (see: dolomite)