Glass Kiln Repair – Zircon Refractory Bricks
The refractory materials used for glass kiln repair are divided into refractory bricks and unshaped refractories. Zircon refractory bricks for glass kiln and refractory castables of the same material are commonly used zircon bricks refractory materials for glass melting furnaces.
Why Use Zircon Bricks for the Construction of Glass Kilns?
In the glass melting furnace, the molten glass liquid and the flame-flying material will cause certain erosion and damage to the refractory lining of the kiln, which in turn affects the service life of the glass melting furnace. In addition, it is necessary to reduce the pollution of the molten glass.
From the performance indexes of representative zircon bricks for glass kilns at home and abroad, zircon bricks are more wear-resistant, more resistant to corrosion, and can reduce the pollution of molten glass.
Therefore, the choice of zircon brick refractories for glass furnaces can extend the life of glass furnaces and improve the quality of glass.
Introduction of Zircon Bricks for Glass Kiln
The low-porosity zircon brick is a special refractory brick product used for melting the glass fiber kiln bath pool for glass fiber. The zircon brick used in the glass kiln is made of zircon as the main raw material, added with a binder and an additive, and is equipped in proportion, stirred, kneaded, formed, dried and then fired at a high temperature. Zircon bricks are divided into two grades according to the production process and physical and chemical indicators, ZS-G and ZS-Z.
Zircon Bricks Physical and Chemical Indicators
| Item | Indicators | ||
| ZS-G | ZS-Z | ||
| Chemical Composition / % | ZrO2 | ≥64.0 | ≥64.0 |
| SiO2 | ≤34.0 | ≤34.0 | |
| Fe2O3 | ≤0.40 | ≤0.40 | |
| Bulk density / g/cm3 | ≥4.10 | ≥3.84 | |
| Apparent Porosity / % | ＜2 | ＜11 | |
| Cold Crushing Strength / MPa | ＞392 | ＞392 | |
| Refractoriness Under Load /℃, (0.2MPa) | ≥1650 | ≥1650 | |
Zircon Refractory Bricks Allowable Deviation of Brick Size & Appearance Quality
| Item | Indicators | |||||
| size ≤ 230 mm | size＞230 mm | |||||
| Processing | Non-processing | Processing | Non-processing | |||
| Dimensional tolerance / (≤) | ±1mm | ±3mm | ±1% | ±2% | ||
| Plane diagonal length difference / mm (≤) | 0 | 4 | 1 | 4 | ||
| Distortion / % (≤) | 0 | ±0.5 | 0 | ±1.0 | ||
| Corner Defect | Quantity number (≤) | 0 | 1 | 0 | 3 | |
| Quantity on work plane (≤) | 0 | 0 | 0 | 1 | ||
| Defect Depth / mm | 0 | 10 | 0 | 15 | ||
| Edge Defect | Defect Depth / mm | 0 | 8 | 0 | 8 | |
| The length of the defects on each edge is not greater than the length of the edge | 0 | 1/4 | 0 | 1/4 | ||
| Crack Defect | defects width ≤ 0.25mm, not larger than the area of the brick / % | 0 | 25 | 25 | 25 | |
| defects width 0.26 ~ 0.50 mm, the length not larger than the area of the brick | 0 | 1/2 | 1/3 | 1/2 | ||
| defects width 0.51 ~ 1.0 mm, the length not larger than the area of the brick | Not allowed | 1/2 | 1/3 | 1/2 | ||
| defects width ≥ 1.0 mm | Not Allowed | |||||
| defects width 0.51 ~ 1.0 mm number | Not Allowed | ≤1 | ≤2 | ≤4 | ||
| defects width 0.51 ~ 1.0 mm, number across the edge | Not Allowed | ≤1 | ≤1 | ≤2 | ||
| defects width 0.51 ~ 1.0 mm, number across the double edges | Not Allowed | ≤1 | ||||
| Fused material attached to the brick surface | Not allowed | |||||
Zircon Bricks Properties for Glass Kiln
- 1. High refractoriness and high softening temperature.
- 2. anti-slag liquid erosion ability, strong acid resistance.
- 3. High compressive strength.
- 4. Good thermal shock resistance.
Main Application Parts of Zircon Bricks for Glass Kiln
Which part of the glass kiln is used for dense zircon bricks in glass kiln? The zircon brick is used for the working layer of the glass kiln wall, and its density is high, and it is strong against the glass liquid as the working layer of the pool wall.
Zircon Bricks Price for Glass Kiln
What is the price of zircon bricks for a glass kiln? The price of zircon bricks on the market is currently not fixed. The actual price of zircon bricks for a glass kiln needs to consult the manufacturer, combined with the actual situation of the glass kiln, in order to get the most satisfactory products and quotations.
