... ,1260,1360,1430. 3.Excellent thermal insulation property. Bulk ceramic fiber,Ceramic bulk fiber, Loose ceramic fiberCharacteristic:1. Low thermal conductivity ... back lining):1.Furnace of steel industry, covers of steel package, heat treatment furnace and soaking furnace;2.Industrial furnace ... -temperature seal;daily-use electrical heat insulation and retardant. Bulk ceramic fiber , Loose ceramic fiber