Patent ID: 6200631
Filing Date: 2001-03-13
Classification: C03B,C04B,Y10T

Abstract:
A process for reconditioning a silica-based refractory already subjected to high temperature and corrosive conditions in a furnace, to improve the corrosion resistance of the silica-based refractory comprising:(A) providing a silica-based refractory, having pores, and already subjected to high temperature and corrosive conditions in a furnace;(B) impregnating the silica-based refractory with a metal salt precursor by passing the precursor into the pores of the refractory; and(C) providing energy to the silica-based refractory impregnated with said precursor, converting said precursor to a metal oxide, and at least partially filling said pores with said metal oxide which has a higher resistance to corrosion than does silica, and which increases the viscosity of any corrosive liquid that enters said pores.