The module comprises a folding block, a slicing block, a Palo block and a vacuum forming block. Due to the different manufacturing methods and crystal structure of polycrystalline mullite fiber, its fiber length is short and its softness is poor. It cannot be made into a large module, resulting in the large-scale application of polycrystalline fibers. At present, polycrystalline fiber is mostly used on the inner surface of castable or refractory brick furnace wall and furnace top. The use of polycrystalline fiber can effectively reduce the temperature of furnace outer wall and reduce the heat storage loss of furnace wall. The ceramic fiber insulation block is made by pressing the ceramic fiber blanket according to the specified size with a module punching machine. After pressing, the specification size and compression ratio shall be corrected twice to ensure the module size and unit weight.

The ceramic fiber insulation block firmly combines the module with the furnace shell steel plate through the anchor embedded in the module and the external anchor on the welded early furnace shell.

The module has excellent elasticity. After each module is installed, the binding belt is loosened, and the modules are extruded with each other, so that the module forms a seamless whole in the expansion direction, and can compensate the shrinkage of the fiber furnace lining, thus improving the thermal insulation performance of the furnace lining. The overall performance is good.

Refractory ceramic fiber is a kind of flexible and elastic material, so it is unnecessary to consider the thermal stress at high temperature. When refractory bricks and castables are used as furnace structural materials, the furnace must have a large number of rigid steel structures. However, the refractory ceramic fiber lining is easy to fix, which makes great changes in furnace design and construction.

The thermal conductivity of aluminum silicate fiber in high temperature area is very small, which has excellent heat insulation effect. At 1000 ℃, its thermal conductivity is only 15% of that of fireclay brick and about 38% of that of light clay brick.

However, its thermal conductivity is closely related to temperature, bulk density, slag ball content and fiber diameter.

The thermal conductivity of aluminum silicate fiber decreases with the increase of unit weight, but the decreasing range gradually decreases. Even when the unit weight exceeds a certain range, the thermal conductivity does not decrease, and has an increasing trend. At different temperatures, there is a minimum thermal conductivity and the corresponding minimum bulk density. The minimum unit weight corresponding to the minimum thermal conductivity increases with the increase of temperature.