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Zirconia Bricks
Brand: HongTai Refractory
Category: Fused Cast Bricks
Feature: High Melting Point
Payment Terms: T/T, Credit Cardse, E-Checking, Alibaba Trade Assurance
Product Information
Introduction
Technical Data
Properties
Applications
Introduction
Zirconia Bricks are highly refractory bricks made from stabilized zirconia.
Zirconia (ZrO2) has a very high melting point of 2680°C, so zirconia bricks can withstand extremely high temperatures without melting or decomposing.
Zirconia bricks are used in furnaces, kilns and incinerators due to their excellent resistance to slag, corrosion and spalling. They have low thermal conductivity and high density which makes them suitable for insulation of high-temperature equipment. Zirconia bricks are expensive but have a long service life.
Technical Data
| 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 | |
Properties
- High Melting Point
- Excellent Thermal Stability
- High Chemical Inertness
- High Mechanical Strength
- Good Thermal Conductivity
- High Refractoriness
- Low Porosity
Applications
| Industry | Application |
|---|---|
| Glass furnaces | Superstructure, ports, tanks, melt channels |
| Steel furnaces | Roof, walls, ports (electric arc, basic oxygen, vacuum degassing) |
| Non-ferrous metals | Furnaces for aluminum, copper, zinc production |
| Incinerators | Combustion chambers, stacks, exhaust lines |
| Ceramic kilns | Firing ceramics, porcelain, pottery |
| Coking furnaces | Making coke from coal |
| Reformer furnaces | Producing hydrogen, synthesis gas, chemicals |
| Annealing furnaces | Heat treating glass and metals |
| Gasification | Producing combustible gases from coal and biomass |
