Problems and Quick Solutions During the Ignition and Baking Process of Glass Melting Furnace

The firing of the kiln is a process in which the furnace temperature is gradually raised from normal temperature to normal production temperature after the glass melting furnace lining is completed and the furnace masonry is completed. It must be passed before the furnace can be operated. The baking is of great significance for extending the service life of the furnace and improving the output and quality of glass products. The following are common problems that may occur during the kiln baking process and how to deal with them.

01 The sinking of the crown roof bricks

During the kiln baking process, individual bricks in the crown sometimes sink. This is caused by the different specifications of the bricks, excessive mud joints or too many loose ties. When it is found that individual tiles are sinking, use thin iron plates to block them; if the sinking is severe and exceeds half the thickness of the crown, it is necessary to add another tile from above.

02 Deviates, bulges or longitudinal cracks of the crown

This situation is generally caused by the actual temperature rising too fast, untimely or uneven loosening of the tie bars, inconsistent temperatures on both sides of the crown, and structural problems. Once this happens, the tightness of the tie bars should be adjusted immediately. You can also press bricks or iron blocks on the raised areas of the ceown to restore the crown.

03 Explosion of mullite bricks or zirconium corundum bricks

Generally, after a large fire, the fused refractory material is likely to burst at 1100~1200℃ due to excessive temperature rise. In order to reduce explosion, the temperature must be raised strictly according to the heating plan. Especially after a large fire, the temperature must not be raised too fast. Especially in the winter season when the temperature difference is large, you can consider temporarily blocking the leaking part of the pool wall with calcium silicate boards, and then remove it after the heat transfer between the inside and outside of the pool wall is completely uniform.

04 The flue is not tightly sealed

Due to the loose sealing of the flue, air leakage will affect the temperature of the exhaust flue. It is best to solve this problem before lighting the kiln. If air leakage is found during the kiln baking process, seal it tightly with plaster as much as possible.

05 Deformation of the regenerator wall caused by excessive temperature rise

When baking the regenerator, attention should be paid to carefully checking each expansion joint before baking to see if there is any blockage that affects the free expansion of the masonry, especially the gap between the brick and the wall. In addition, there is the problem of expansion joints in partition walls. Parts that can be kept warm before heating are temporarily insulated to minimize the temperature difference between inside and outside. The temperature must rise evenly and slowly, and local overheating must not occur. Severe expansion may cause cracks in the masonry and affect its service life. Particular attention must be paid to the fact that the wall may deform if it heats up too quickly after a large fire.