METHOD AND APPARATUS FOR SPRAY COATING OF REFRACTORY MATERIAL TO REFRACTORY CONSTRUCTION

摘要

Device with a lance (10) having two nozzles (12, 14) for the use in spray coating of refractory constructions. The spray coating is performed utilizing a mixture of refractory material and a combustionable metal powder. The size of the particle of the metal in the mixture is selected so that the particle size is large enough to be treated safely and is small enough to be transported by means of a gas flow. As a carrier gas for carrying the mixture, a non-combustionable gas or fuel gas is used. A fuel gas and a combustion-assisting gas are discharged toward the section to be treated on the surface for directing a combustioning frame. The refractor material with the carrier gas is discharged into the frame established by the fuel gas and the combustion-assisting gas. This compensates combustion efficiency to be dropped by utilizing the larger particle size metal.