The hot air furnace is an important equipment in the smelting of blast furnaces. Depending on the temperature of each area, the refractory bricks used are different. The traditional hot air furnace structure is combined with silicon, high aluminum, clay and other materials. For example, the medium temperature area of the hot air furnace is mainly made of low creep and high aluminum brick. Why does the hot air furnace medium temperature area choose low creep and aluminum bricks? How effective is the use?
1. The working environment of the hot air furnace medium temperature area
The medium temperature area of the hot air furnace is not very high, basically 600 ~ 1200 ° C. It mainly includes the burning chamber side, the heat storage room side, and near the hot air outlet, etc., all of which are high -temperature transition areas. The focus of these areas is that the temperature gap is large. Therefore, when choosing a refractory brick, you should choose a low creep and high aluminum brick with good cold and hot heat.
2. The performance of low creep and high alumina bricks
In the above -mentioned medium temperature area, we mainly use low creep and high creep and high alumina bricks, low creep and high aluminum bricks, and use high -quality high aluminum alum soil, with blue spar, red pillars, silicon stones and other high -end high -end stones. The "three stone" refractory raw materials are fired. These three stone components, during the firing of high aluminum bricks, complete the two Mo Lai stone crystal changes, and finally form a stable Mo Lai stone crystal phase, so that high alumina bricks have very good creep resistance.
3. Use effect
In the medium temperature area of the hot air furnace, the plan of low creep and high aluminum brick masonry has been developed well. Its good high temperature use performance can be well adapted to the changes in its working environment. The performance of the brick body is stable, and the use cycle of the hot air furnace is effectively extended.
