Patent ID: 7066242
Filing Date: 2006-06-27
Classification: F22B,F28F,Y10T

Abstract:
1. In combination: a boiler tube in a boiler through which passes a stream of hot gas containing particulates; and a refractory shield assembly for protecting the boiler tube with respect to abrasion and erosion by the gas stream, said gas stream being directed at one side of the boiler tube; the refractory shield assembly comprising: an arcuate, elongate, metal, sacrificial shield extending part way around said tube so as to overlie the length of the boiler tube that lies in the path of the gas stream, the shield having an outer surface facing the oncoming gas stream; a plurality of spaced apart anchors attached to the shield's outer surface so as to protrude outwardly therefrom; a monolithic layer of an abrasion-resistant refractory material overlying sufficient of the shield's outer surface so as to protect the shield from the oncoming gas stream, said layer engaging the anchors so that the refractory material is secured in place on the shield by the anchors; and means for securing the shield to the boiler tube.