Patent ID: 6372288
Filing Date: 2002-04-16
Classification: C03B,C04B

Abstract:
A ceramic welding process for the formation of a coherent refractory repair mass on a surface of an electrocast refractory material, comprising:providing an electrocast refractory material having a surface to be repaired; providing a first powder mixture comprised of combustible particles, refractory particles in which at least part of the refractory particles are particles of an alumina-zirconia eutectic compound, and at least one constituent which enhances production of a vitreous phase in the coherent refractory repair mass, which is present in an amount effective to ensure the presence of the vitreous phase, and which is selected from the group consisting of sodium carbonate, sodium sulfate, sodium oxide, potassium carbonate, potassium sulfate, and potassium oxide; and projecting the first powder mixture in a gas stream containing oxygen against the surface to be repaired so that the combustible particles react with the projected oxygen against the surface in a highly exothermic manner and release sufficient heat of combustion to form a first coherent refractory repair mass.