With the high strength of the application range of ceramic fiber and the increasingly wide application of wind erosion resistant hard fiber wall lining, hard products must be produced by vacuum forming process. At the same time, the proportion of binder, aggregate and additive added to different products in production is different.

Polycrystalline mullite fiber (72%alo) and polycrystalline alumina fiber (80%, 95%alo) have been successfully used in kilns above 1300 ° C in the metallurgical, petrochemical and electric porcelain industries since their inception. However, due to the limitations of polycrystalline fiber production technology and process, only bulk polycrystalline fiber laminations can be provided at present, and the laminations form a fiber veneer component with a size of 300mm*300mm*30mm~50mm, and the unit weight of the component is 100kg/m, The fiber laminated component is bonded to the refractory brick wall through adhesive. In addition, high alumina fiber is mixed with polycrystalline alumina fiber (or polycrystalline mullite fiber) in a certain proportion to produce mixed fiber products by vacuum forming process, which can be used as the wall lining of 1250 ~1300 ℃ high-temperature kilns. The ceramic fiber application accessories are the main conditions to promote the development of ceramic fiber application technology, For large-scale kiln fiber wall lining, the traditional layered fiber lining has been replaced by fiber component lining with different structures. This development trend has promoted the development of ceramic fiber application supporting parts, and some professional ceramic fiber application supporting technologies have emerged.