Refractory composition of firing magnesia spinel with cement clinker coating and alkali penetration resistance

摘要

Provided is a calcined magnesia spinel fire resistant composition having excellent cement clincher coating properties and alkali penetration resistance. The refractory composition of the present invention, by weight, sintered magnesia clinker: 60 to 85%, sintered spinel (MgO.Al ₂ O ₃ ) clinker: 10 to 35% and electromelting Hercynite clinker: 3 to 5%, wherein the sintered magnesia clinker is a fine powder having an average particle size of 0.075 mm or less, and the MgO content is 97% by weight or more, by weight% by itself, and weight% by itself As a result, the fine powder having a particle size of 0.075 mm or less is included in the range of 26 to 32%.