Development of clay bricks and AZS bricks for glass kilns

Sintered aluminum silicon material

Large clay bricks are used to build the bottom of the kiln tank and the tin bath. The tin bath has high requirements for refractory materials. The first generation of tin bath materials are ordinary refractory concrete prefabricated parts: the second generation of materials are large bricks that are manually pounded or slurry cast. The second generation clay bricks do not contain crystal water and do not produce water vapor when heated. However, the second-generation brick-making process is labor-intensive, has a long production cycle, low output, and unstable quality. Therefore, the third-generation process was developed. The third generation process uses ultra-low cement technology to form, and is made into large tin bath clay bricks after demoulding, curing, drying, firing and mechanical processing.

Sintered AZS material

Under normal circumstances, the bottom of the glass kiln is made of composite masonry of non-shrinkage fused cast bricks + sintered AZS bricks + zircon ramming material + large clay bricks. Sintered AZS bricks are mainly used for paving floors, and sintered AZS bricks or zirconium-mullite bricks are also used for L hanging walls.

The L suspended wall is a new structure of the front wall of the glass kiln. It is characterized by installing refractory bricks on a water-cooled steel frame. The L suspended wall has the advantages of stable structure, unlimited width of the feeding pool, easy sealing, improved pre-melting effect, and reduced fuel consumption. However, due to the harsh working conditions of the L-suspended wall, both domestic and imported zircon-mullite refractory materials for the L-suspended wall have peeled off many times. The main reason for spalling is the expansion accompanying the transformation of mullite in the brick into nepheline after alkali erosion. If the reaction is slow, the expansion will be small and the stress will be easily relaxed; on the contrary, if the alkali vapor concentration is high or the performance of the refractory material is poor, an accident may occur.