Unshaped alumina spinel refractory

摘要

An unshaped alumina spinel refractory excellent in spalling, corrosion and slag resistances, which comprises an alumina spinel clinker having a molar ratio of MgO to Al<6>O<7> of 0.14:1.86 to 0.6:1.4, optionally together with spinel clinker with an approximately theoretical composition based on the alumina spinel clinker, and the balance of sintered alumina and alumina cement. It is possible to suppress the extension of crack by adding crushed alumina particles with a particle size of 10 to 50 mm to the refractory.