Ceramic fiber masonry methods and precautions

There are usually two methods for masonry fiber: one is to apply the felt layer by layer, and then rivet it with a bolt rod. Generally, the temperature resistant metal bolt rod is used below 1222 ℃, and the ceramic riveted parts are used above 1223 ℃. One end near the hot surface is filled with loose fiber and heat-resistant cement. The use of ceramic riveted parts can also prevent fiber deterioration caused by carbon deposition. The second method is to use prefabricated assemblies, i.e. prefabricated components stacked with felt or prefabricated components folded into accordion type with 305mm wide felt. Compared with the two, the latter has higher energy-saving efficiency but higher cost because it is made of the same material from the furnace shell to the hot surface.

When the temperature rises, the joints formed by the laying of fiber prefabricated parts shall be inlaid with flexible fibers. Prefabricated assemblies are easy to install, fast and easy to maintain, and only the damaged parts need to be replaced.

In terms of thermal efficiency, the layer by layer method is obviously better than the prefabricated assembly. Because the fiber direction of the former is perpendicular to the heat flow, and the fiber direction of the stacked prefabricated assembly is parallel to the heat flow, the difference in thermal conductivity between the two is about 20-40%. For example, the accordion shaped folded prefabricated assembly is between the two, and its fiber direction is both parallel and perpendicular to the heat flow.