Surface protection board spare body and the furnace wall insulation material for surface protection board and furnace wall insulation material using them

摘要

PURPOSE:To give a heat insulator surface protection and durability while obtaining a surface protection board for a furnace wall heat insulator having high mechanical strength and heat insulation efficiency by compressing to produce a sheet-like material containing carbonizable into carbon fibers, the carbon fiber or both mixed fibers and a bonding agent to perform carbonization and graphitization processing. CONSTITUTION:For instancece, fibers which make raw materials of acrylonitrile, cellulose, rayon, phenol resin and the like are used as carbon fiber-possible fibers containing in a surface protection board preliminary body 2. Thermosetting resin such as phenol resin and furan resin which have a high actual carbon ratio at the time of carbonization and graphitization and are superior in adhesion is preferable as a bonding agent. In addition, in order to control radiation heat transfer in the range of high temperature and heighten heat insulation efficiency, a coating layer 1 containing the bonding agent and crystalline graphite powder is formed on at least one surface of the compressed and molded surface protection board preliminary body. In addition, the coating layer 1 is preferable to contain the carbon fiber-possible fiber or carbon fiber of fiber length of 0.01-1.0mm.