Abstract: The invention relates to precluding the shortcomings intrinsic to the conventional unburned carbon-containing refractory bricks, i.e., oxidization under high temperature conditions and the incidental decarbonization, the phenomenon of exfoliation and detachment of the fragile layers, and more particularly to obtaining thereby unburned carbon-containing refractory bricks having the high properties by causing refractory brick material comprising substantially more than 1 weight % carbon to contain 1-10 weight % aluminum powder and/or magnesium powder each independently or in a mixture thereof, and/or 0.5-6 weight % silicon powder.

Abstract: Unshaped refractories are disclosed which have incorporated therein granules comprising fine powder refractory and carbonaceous material. The fine powder refractory may be the refractories of magnesia clinker, dolomite, magnesia-dolomite, high alumina, recovered materials of such refractories recovered after use, and mixtures of two or more thereof. The carbonaceous material may be any one of: thermosetting resin, a thermoplastic resin to which has been added pitch and hardening agent, other resins, or mixtures of two or more thereof.