How to Extend the Service Life of Checker Bricks used in Glass Melting Furnaces?

The Checker Brick body is the heat transfer part of the regenerator and the most important component of the regenerator structure. Whether the structure of the Checker Brick body is reasonable not only affects the service life of the regenerator but also directly affects the heat storage efficiency of the regenerator, which in turn affects the thermal efficiency of the entire furnace. Therefore, the refractory materials that make up the lattice body are required to be able to withstand high temperatures, resist corrosion, accumulate a lot of heat, transfer heat quickly, and have good thermal vibration stability. The entire Checker Brick body is required to have good structural stability.

Checker Brick with Good Structural Stability

The regenerator checker brick body that has been exposed to high-temperature flue gas for a long time is subject to periodic cooling and heating and is subject to erosion by flying materials and alkali vapor. The lattice holes can become clogged or damaged, causing the bricks to deform, crack, or even collapse. In the mild case, it will reduce the thermal efficiency of the melting furnace; in serious cases, it will directly affect the production and operation of the melting furnace. Therefore, regular observation and inspection of the Checker Brick is very necessary. The main contents of the inspection are:

① The state of melting, burning, swelling, cracking, and falling off of checker bricks.

② Check whether the Checker Bricks’ holes are blocked. If there is a blockage, the location, scope, and severity of the blockage need to be observed clearly.

③Whether the checker brick body has collapsed.

④ Check the slag accumulation condition in the regenerator and flue.

⑤ Check whether there is any air leakage in the regenerator and flue.

checker brick exposed to high-temp flue gas

Sodium silicate melting production requires stable temperature, kiln pressure, and normal feeding operations. However, it should be noted that regular removal of dust accumulation in the regenerator and flue is a necessary condition for stable operation.

The reversal of the furnace every 20 to 30 minutes changes the direction of the flame flow. While the regenerator checker bricks on one side are heated by high-temperature exhaust gas, cold air enters the regenerator Checker Bricks on the other side, causing the temperature of the Checker Brick to gradually decrease. The temperatures of the regenerator Checker Bricks on both sides show periodic crossovers. Only when the temperature curves of different cycles intersect are basically the same can the temperature be stabilized.

The slag accumulated in the Checker Brick holes should be removed regularly. Cleaning is done on the hot side. If there is a lot of slag accumulated and cannot be completely removed when the fire needs to be changed, the fire should be changed on time and then removed when the fire direction is changed. After removing the slag, a layer of quartz sand should be spread to prevent the dust slag from sticking to the flue pavement tiles.

 

RS Checker Bricks Manufacturer

There are several measures to extend the service life of Checker Bricks:

① The ascending Checker Brick bricks are made of alkaline refractory materials that are resistant to high temperatures and corrosion.

② Widen the furnace bar holes and purge them in time.

③Reasonably control the temperature of the regenerator to avoid excessive kiln pressure.

④ Reasonably arrange regular hot repairs.

⑤ Reduce powder flying.

⑥ Set long fire regularly, or use an oil gun to burn nodules, etc.

Therefore, in order to better extend the service life of the Checker Bricks used in glass melting furnaces, in addition to choosing high-quality refractory bricks when purchasing Checker Bricks. It is also necessary to carry out maintenance and repair during its use, so as to ensure the service life of the checkered bricks. This reduces the number of furnace shutdowns and furnace repairs.