As we all know, a large temperature difference in the kiln will seriously affect its overall performance and service life. To help solve this problem effectively, our team from Yonghua Machinery, a manufacturer of rotary tunnel kilns, has summarized the causes of excessive temperature difference in rotary tunnel kilns for your reference.

Firstly, the hot flue gas inside the rotary tunnel kiln has low density and rises to the top under pressure, resulting in a large vertical temperature difference.

Secondly, the preheating zone of the kiln operates under negative pressure. Poor sealing allows a large amount of cold air to infiltrate. Hot gas tends to move upward, causing severe gas stratification and further widening the vertical temperature gap.

Furthermore, the lining bricks of kiln cars absorb excessive heat, sharply lowering the temperature at the bottom of the preheating zone. In addition, the large space at the crown and upper side walls creates low gas resistance, which also leads to prominent vertical temperature difference.

The above are the main causes summarized by Yonghua Machinery. It is recommended to take preventive measures in advance to avoid excessive vertical temperature difference inside the kiln.