Importance of using refractory mud in burner of hot blast stove

The role of the burner refractory mud is to connect the molding products, so that the brick joints between the refractory brick to prevent slag and metal melt through the brick joints into the internal refractory brick. Therefore, the burner refractory mud must have good construction performance. After barbecue heating, should have good sintering performance and enough corrosion resistance.

As refractory mud is the weakest link in the process of firebrick use, especially the refractory mud between the lining of firebrick determines the service life of firebrick to a great extent. Generally speaking, the burner refractory brick is red stone brick or low creep brick or cordierite brick, and the pipe part is andalusite brick or low creep brick. After pre-laying, the refractory brick polishing problem is found, so that the construction is more convenient and the ash seam is smaller.

Due to the severe temperature and erosion of burners and pipes, many andalusite bricks are constructed with high aluminum mud. In the process of use, refractory mud and brick bonding is not good, frequent thermal shock parts easy to shrink crack, ash crack increase, resulting in brick fall off or draw lots, affect the service life of furnace lining.

Because andalusite does not shrink at high temperature, low creep rate, small thermal expansion coefficient, strong chemical erosion resistance, strong thermal shock resistance, so in the burner and pipeline parts of the andalusite fire mud. Andalusite refractory mud with andalusite as the main raw material high strength, very stable.

Therefore, the refractory mud used for hot blast stove burner and pipe bricklaying must use andalusite mud, which not only has good spreadability, but also does not shrink stably at high temperature and improves the service life.