1. refractory cements: iron cement 1 kg / 1 kg.�- 10sht.v paste-like form in metal cans, from calcined dolomite 55-60%, with the addition of aqueous sodium silicate fillers and 30-35% (no asbestos) contains 10-25% barium sulphate, black, refractoriness 1600 hrs.vykorystovuyutsya as refractory mater