High density calcium silicate insulation board is a kind of calcium silicate board developed for non-ferrous metals with a density of 800-1000kg/m3, which can be used for the transportation, shipping, molding of molten aluminum, and can also be used for the glass industry. In addition to its own thermal insulation, its non-stick aluminum characteristics have been greatly played, high strength, good processing performance, CNC machine tools can be used to process accurate size products and complex components, in recent years, widely used in thermal power plant heating pipe directly buried cylinder, plastic sleeve steel, with glass fiber reinforced plastic jacket composite insulation pipeline, and can be processed into special-shaped products. There are two types, glass fiber reinforced (N-14) and carbon fiber reinforced (N-17).