Three key points to reduce corrosion of glass kiln pool wall bricks

Three key points to reduce corrosion of glass kiln pool wall bricks

During the operation of a glass kiln, it is inevitable that the brick surface of the pool wall exposed to the kiln will be eroded. The so-called control is to slow down the speed of erosion. Its control direction needs to start from the following three aspects: 

1. Design, manufacturing and construction

From the perspective of economy, different pool wall materials and thicknesses should be selected according to the life and location of the furnace, and whole bricks should be used as much as possible. When choosing layered construction, the upper layer should be made of shallow cast pool wall bricks without shrinkage holes. The contact brick surfaces of the upper and lower pool walls should be carefully processed to ensure that the brick joints are small. Choose pool wall brick manufacturers with good reputation and trustworthy quality to ensure the physical and chemical indicators and processing accuracy of the bricks. When laying bricks on the pool wall, ensure the construction quality, the size of the brick joints meets the requirements, the upper and lower contact surfaces are tight, and the brick body is not damaged.

2. Baking density

Expansion joints around the pool wall should be inspected and cleaned before ignition. Design a scientific and reasonable heating curve and ensure the quality of the kiln. Since the expansion of fused refractory materials at 1000.1100°C is relatively large, try to design a heat preservation process and increase the kiln temperature for over-fire to reduce the damage to the pool wall bricks when the kiln is over-fire. To avoid the impact of impact, the pool wall cooling fan is turned on when the kiln temperature rises to about 300°C. As the temperature gradually increases, the cooling air volume gradually increases. During normal production, the air blowing is normal to prevent the pool wall bricks from pulverizing and bursting. Adjust the iron parts of the top pool wall tiles in time.

3. Operation aspect

(1) Melting operation:

Improve the melting operation capacity to ensure the "four major stability" and "four minor stability", especially to avoid large changes in the material pile position, material deviation and large fluctuations in the liquid level.

(2) Pool wall cooling air:

The corrosion of pool wall tiles is most serious at the glass liquid surface at the three-phase interface of solid phase - gas phase - liquid phase. Use the cooling air system correctly and adjust the position of the air nozzle in time to reduce the temperature here and reduce the erosion rate. In order to prevent the pool wall bricks from exploding and the cooling air volume not to fluctuate greatly, a fan motor instantaneous power failure starting device is installed to reduce the impact of a power outage on the fan. In the event of a long-term power outage, after the fan is started, the cooling air volume should be slowly increased to avoid large-scale explosion of the pool wall tiles caused by rapid cooling.

(3) Material pile:

The most severely eroded part of the pool wall is the part that is impacted by the "Babang Slit", which is more serious than the erosion of the fused zirconium corundum bricks caused by pure glass liquid contacting the pool wall. There are many ways to control the stockpile, and the appropriate method should be selected according to the actual situation of the enterprise.

① Appropriately increase the temperature of the melting zone of the melting part or add a "0" gun in front of the 1# small furnace, and use pure oxygen combustion technology to enhance the pre-melting effect of the batch materials, shorten the length of the material mountain, and avoid forming eight-shaped materials as much as possible. Thereby reducing the erosion of the material pile on the pool wall,

②Insert a guide water bar in the center of the feeding pool to close the material piles on both sides to avoid the eight-shaped material and achieve the purpose of the material pile not contacting the pool wall; ③Insert blocking water bars on both sides of the feeding pool to prevent and ease the batch materials , The direct erosion of the pool wall bricks by the glass liquid reduces the erosion of the pool wall.

④) Use a feeding pool with equal widths or a feeding pool with quasi-equal widths. The feeding port is designed with a feeding pool structure of equal widths or quasi-equal widths to make the material layer thinner, which can prevent material deviation and reduce the impact of the material pile on the pool wall. angle to reduce impact erosion.