Refractories&Glass Crack

In addition to contacting the atmosphere of the upper space kiln, the glass liquid also contacts the wall surface of the large area of refractories. The corrosion resistance of the refractory is limited, and it will dissolve into the glass liquid slowly and become streaks.
When the small corners and edges of the refractory surface are eroded by the glass solution and dissolved, although the alumina solution with the size of droplets is only available in the hole, it will also form a "alumina line" that is not easy to be eliminated in the glass solution. Dissolved refractories are continuously removed by the glass flow to create streaks, but the resulting damage is far less than the impact on "dead corners" in the flow, such as the back of the kiln wall protrusions, brick cracks or other pits.