Because of its unique composition and process characteristics, the kiln usually adopts electric heating as the main melting method and gas heating as the auxiliary method. Due to the flow of glass in the kiln and the difference between the material of the electrode brick and the wall brick, the kiln is corroded. High speed, electrode brick erosion rate is greater than pool wall brick erosion rate, and the joint part with pool wall brick is easy to corrode to form grooves, which accelerates the pool wall brick erosion. There are serious safety hazards in the later period of kiln operation and the kiln operation life is short. In order to further extend the service life of the kiln, slow down the corrosion rate of the kiln and provide safety guarantee for the later period of the kiln operation, relevant measures need to be taken.
At present, most of the electrode bricks used in the liquid crystal glass furnace are electrode bricks mainly made of tin oxide, and the pool wall bricks are corrosion-resistant materials such as fused corundum bricks with high zirconium content and high-zirconium bricks. During the operation of the kiln, the electrode is loaded with current, and the temperature of the inner surface of the electrode brick is much higher than that of the adjacent pool wall brick. At the same time, the corrosion resistance of the electrode brick is lower than that of the pool wall brick in a high temperature environment, resulting in a much higher erosion rate of the electrode brick in the kiln Because of the erosion rate of pool wall tiles. After the kiln has been running for a period of time, the erosion of the electrode bricks is greater than the erosion of the pool wall bricks, causing the honey to form grooves at the electrode bricks. The pool wall bricks at the edges of the grooves are intensified due to the mechanical erosion of the glass liquid, and the erosion rate also increases. . In the later period of the kiln operation, there was obvious red light transmission at the weak spots of the electrode bricks and the pool wall bricks, and there were abnormal phenomena such as glass extrusion at the joints of the bricks, and there were serious safety hazards in the operation of the kiln.
Corresponding measures:
Promote electrode bricks regularly.
Promotion principle:
Reduce the impact of the propulsion action on production, and implement a small amount of times. Without changing the material, appearance, installation location and other objective conditions of electrode bricks, the erosion rate of electrode bricks is higher than that of pool wall bricks.
In order to reduce the erosion of the pool wall tiles caused by the grooves formed by the erosion of the electrode bricks, the glass composition is measured and analyzed regularly, and the tin oxide content in the glass is calculated, and then the total erosion of the electrode bricks is obtained. According to the contact between the electrode bricks and the molten glass The area can calculate the electrode brick erosion thickness and erosion rate (mm/month). According to the actual production situation, the electrode is regularly promoted to reduce the depth of the groove formed between the electrode brick and the adjacent pool wall, and reduce the erosion rate of the pool wall. The advancing time interval should not be greater than 12 months/time to avoid excessively deep grooves caused by long-term non-adjustment, and expansion of the groove area, and the relief effect after advancing is not obvious. At the same time, the installation position of each pair of electrode bricks is different, and the corresponding erosion amount is also different. Generally, near the hot spot, the temperature of the molten glass is high and the convection is strong. The electrode bricks near this location are relatively more eroded than other locations, and the amount of advancement can be increased appropriately, while other locations are reduced accordingly.
Wechat Us 
