The application of electrofused zirconium rigid card brick in Mati flame kiln has been widely developed, and its application outside the nozzle of horseshoe flame kiln can reach 8~10 years.

Horseshoe flame kiln is composed of combustion system, melting system, heat recovery system and smoke exhaust system. An important part of the combustion system is the small furnace. The length of the flame and Rigidity, flame Angle, flame brightness, flame coverage, are the four elements of the small furnace structure is reasonable. The fire nozzle is the door to the small furnace, which transmits the fuel.

 

It is effectively organized to the melting pool for combustion, and then the high-temperature exhaust gas after combustion is introduced to the regenerator for heat recovery of flue gas. The four elements of the small furnace pass through the nozzle Shape, size. Outside of the fire nozzle is the worst place in the melting kiln, on the one hand is high temperature, the heat Angle charge under the fire nozzle is the largest part of the melting kiln: the other side is the fire.

 

The mouth is nearest to the feeding mouth. The alkali dust in the compound material, the corrosive gas produced by the decomposition of raw materials and some volatiles of salt can corrode the fire nozzle brick body. It is the scouring and burning of the brick body of the fire nozzle by high temperature airflow, so the selection of refractory material of the fire nozzle is very important. It should have good high temperature performance, that is, mechanical strength. To be high, load softening temperature to be high, creep temperature to be high, but also to be very good chemical stability, anti-air erosion, good erosion resistance.

The selection of flame-blasting refractories has gone through the following stages: silicon brick, electric fused grass stone brick (iron brick) and electric fused zirconium corundum brick.

Corundum brick as the first choice of fire nozzle refractory material, is very appropriate. Because it has high mechanical strength, fire resistance and load softening temperature, good chemical stability

Sex, because this uses electricity to fuse the fire mouth that zirconium corundum brick makes it, service life can amount to 8~10 years, not because of the change that fuses inspects size structure, some fuses narrow fire mouth even in it is still in use for more than 10 years.