Zircon brick is a kind of refractory products, which is mainly burnt by the ZrO2- SiO2 as the principle material; It is mainly used in crown springer or the separation brick for the breast wall and crown, kiln eye, inspection hole, etc. Good using effects.
Characteristics of Zircon Brick
- The content of Zircon in zircon brick is 64~67%;
- It is a kind of neutral material;
- Its refractoriness under load is equal or greater than 1650℃, the density is form 3.70 to 3.75 g/cm3.
- zircon brick has the ability of strong resistance to glass liquid, good creep resistance and high refractoriness under load.
Advantages of Zircon Brick
Zircon brick has good mechanical strength, high temperature resistance, good thermal shock resistance and anti-glass corrosion and other advantages.
Application of Zircon Brick
- ladle lining in metallurgical industry and Glass melting furnace
- Areas of crown, burner, thermal couple, peep hole, and secondary layer of melter bottom and back lining.
- Areas of glass tank, such as paving part and secondary layer of paving bottom, back lining, wall and bottom of fore hearth, flowing spout and spinning portion and melter.
- Upper area of flame space or frequent thermal shock position.
- Lining of alkali-free or low-alkali glass, sodium-calcium glass, boron-silicate glass, ceramic glass, lead glass, and other technical glass melting furnace.
Physical and Chemical iIndex of Zircon Brick
Zircon Bricks | ||||||
Item/Index | ZR-30 | ZR-50 | ZR-55 | ZR-60 | ZR-62 | |
Al2O3 % | 42 | 10 | 6 | 4 | – | |
SiO2 | 20 | 34 | 35 | 30 | 34 | |
ZrO2 | 30 | 50 | 55 | 60 | 62 | |
Bulk Density (g/cm3) | ≥3.10 | ≥3.30 | ≥3.45 | ≥3.50 | ≥3.60 | |
Apparent Porosity % | ≤21 | ≤20 | ≤20 | ≤21 | ≤20 | |
Compressive Strength (kg/cm2) | ≥500 | ≥400 | ≥500 | ≥500 | ≥500 | |
Refractoriness Under Load ℃ (T2) | >1500 | >1450 | >1500 | >1600 | >1550 | |
Expansion at 1000℃ (%) | 0.6~0.8 | 0.4~0.6 | 0.4~0.6 | 0.4~0.6 | 0.4~0.6 | |
Thermal Conductivity | 500℃ | 1.7 | 1.4 | 1.3 | 1.2 | 1.2 |
1000℃ | 1.8 | 1.6 | 1.5 | 1.5 | 1.5 | |
Application | Glass Furnace | Nozzle Seat | Ladle | Ladle | Ladle Glass Furnace |