At present, the rapid development of science and technology, the research on refractory materials of limonite rotary kiln is gradually put on the agenda, and has achieved some good results, such as the carbon nanotube composite refractory technology currently described.

     Carbon nanotubes have good properties, so they are introduced into refractory materials as a new type of material to develop high-performance lignite rotary kiln refractories. However, it may involve the following problems in use: at high temperatures, carbon nanotubes may change, become other substances or be oxidized; prone to agglomeration, which is not conducive to dispersion. Limonite rotary kiln experts have studied these issues.

     The first is to change the structure and the connection of the admixture, choose the appropriate silicon source and temperature to prevent the material from changing. Then a coating is formed on the surface, which not only prevents its alteration, but also improves its overall performance. Finally, the use of a catalyst to form carbon nanotubes at high temperatures improves the performance of the limonite rotary kiln material.