● The gasifier is a high temperature and high pressure equipment, and the lining must be installed with refractory materials. Ordinary refractory materials are difficult to meet the conditions of use of advanced gasifiers, and high-chrome bricks of arable refractory materials meet the demand for refractory materials for coal lining pressurized gasification furnaces.
● To the fire surface brick: the quality of the fire surface refractory material directly affects the operational stability and service life of the furnace. The fire surface refractory material is required to be resistant to high-speed airflow and scouring, abrasion and erosion of coal, coke, residue, etc. under high temperature conditions; it has good thermal shock stability and high temperature creep resistance. KAB-90 is usually used for fire surface materials, and KAB-90S is available for slag or harsh parts.
●Support brick: It is located behind the fire brick and plays a vital role in mechanical support and protection for the gasifier refractory as a whole, and can be eroded by high temperature gas. The chrome corundum brick for supporting bricks has a high strength, and more than 12% of the chromium oxide increases the gas corrosion resistance of the product.
●Insulating brick: After the supporting brick, the alumina hollow ball brick is used to keep the gasifier warm, so that the temperature of the outer wall is kept at the set value. Alumina hollow ball brick is a good energy-saving material, in addition to low thermal conductivity, it also has good corrosion resistance.
● Castables: castables are chrome corundum castables and alumina hollow sphere castables. Chromium corundum castables are used for the dome and cone bottom. Compared with bricks, castables have the following advantages: convenient construction, good integrity and good air tightness. Alumina hollow ball castables have the advantages of heat preservation and energy saving, and convenient construction.
● Compressible layer: aluminum silicate fiber felt, ceramic fiber plastic. Adhered to the inner surface of the cylinder wall, it has small bulk density, low heat conductivity, strong compressibility and good thermal insulation performance.