| abstract |
The invention provides a high-strength and high-insulation refractory material, comprising the following components by mass fraction: 60-68% of alumina hollow spheres of 0.2-5 mm, 20-30% of alumina powder of 0-0.044 mm, 0-0.074 mm pure calcium aluminate cement 6~10%, 0~0.044mm chromium trioxide powder 3%, dispersant 0.1~0.3%. The high-strength and high-insulation refractory material of the present invention is used in the gasifier reactor and other parts, and has the advantages of high softening temperature under load, high strength, good heat insulation performance, and the maximum service temperature can reach 1500 DEG C, which is an ideal high-temperature special lining permanent layer. Insulation materials. The invention also provides a preparation method of a high-strength and high-insulation refractory material. The dispersant in the present invention is composed of multiple active substances, so that the water demand of the refractory material is extremely low, and the excellent rheological properties are provided in a wide working temperature range. |