As hot blast stove technology matures, hot blast stoves have increasingly strict requirements for refractory bricks in the furnace, especially in high-temperature areas. The temperature in the furnace is as high as about 1300°C. Therefore, parts such as the upper part of the regenerator and the combustion chamber are most susceptible to high temperatures. Gas erosion makes it more susceptible to damage, directly affecting the use effect and life of the hot blast stove.
In actual engineering operations, there are many types of refractory bricks used in hot blast stove masonry, as follows:
01. Low creep series
This series of refractory bricks are mainly used in hot blast stoves as low creep high alumina bricks and low creep clay bricks.
1) Low-creep clay bricks for hot blast stoves are made of high-quality clay clinker as the main raw material, formed by high pressure and sintered at high temperature. The product has a high softening temperature under load, good medium-temperature creep resistance and good impact resistance. It is an ideal choice for hot blast stoves. The main refractory material in low temperature areas.
2) Low creep high alumina brick is a high-grade refractory material made of special grade alumina, fused corundum and fused mullite as main raw materials. The product has the characteristics of high refractoriness, high softening temperature under load and strong slag resistance.
02. Silica bricks for hot blast stoves
Silica bricks for hot blast stoves are siliceous refractory products with tridymite as the main crystal phase. It is mainly built in the high-temperature part of the blast furnace hot blast furnace. Hot blast stove silica bricks have hot spots such as volume stability, low creep, good thermal shock resistance, and good resistance to chemical erosion.
03. Andalusite bricks for hot blast stoves
Andalusite bricks for hot blast stoves are high-grade refractory bricks among silicon-alumina refractory materials. They have very good thermal shock resistance and creep resistance. It is mainly used in key parts such as hot air outlets and hot air stove doors.
04. High alumina insulation bricks for hot blast stoves
High-alumina insulation bricks are manufactured using the foam production process. They have the advantages of small volume density, high compressive strength, high load softening, small dimensional tolerance, and excellent thermal stability. They can effectively increase thermal efficiency, reduce energy consumption, and improve working conditions. , improve production efficiency and achieve considerable economic benefits. It is mainly used for the insulation layer of hot blast stoves.
According to the actual working conditions of each part of the hot blast stove, choosing the appropriate type of refractory bricks is a very effective way to extend the life of the hot blast stove.
HOME