Zirconium Silicate Brick

Zircon bricks are manufactured by selecting high-purity zircon sand, adding a small amount of special binder, and undergoing high-pressure molding and high-temperature sintering. Their unique properties stem from the inherently stable structure of the zircon (ZrSiO₄) mineral itself, featuring:

Exceptional erosion resistance: Exhibits strong resistance to acidic and neutral glass melts as well as various metallurgical slags, with an extremely low erosion rate.

Extremely high refractoriness and load-bearing softening temperature: Refractoriness exceeds 1790°C with outstanding high-temperature structural strength.

Outstanding thermal shock resistance: Low thermal expansion coefficient enables it to withstand drastic temperature changes without cracking.

Excellent impermeability: Dense structure effectively prevents penetration by molten glass or metals.

Stable chemical inertness: Maintains stable performance in both reducing and oxidizing atmospheres.

Key Technical Specifications:

ZrO₂ Content: ≥ 64.5%

SiO₂ Content: Approx. 33.5%

Refractoriness: ≥ 1790°C

0.2MPa Load Softening Start Temperature: ≥ 1650°C

Bulk Density: ≥ 3.6 g/cm³

Room Temperature Compressive Strength: ≥ 80 MPa

Coefficient of thermal expansion (at 1000°C): As low as ~4.5×10⁻⁶/°C

Zirconia bricks, renowned for their exceptional resistance to erosion and thermal shock, are primarily used in the following extremely demanding high-temperature industrial environments:

1. Core components of the glass industry: Pool wall bricks in glass melting furnaces (especially the most severely eroded liquid surface line area), flow hole cover bricks, charging port corner bricks, and paving bricks.

2. Specialty glass melting furnaces: Areas directly contacting molten glass in furnaces for high-quality glass such as electronic glass, optical glass, and pharmaceutical glass.

3. Metallurgical industry: Critical components for continuous casting of molten steel, including submerged nozzles, long nozzles, slide plates, and vacuum degassing equipment (RH/DH) linings.

4. Non-ferrous metal smelting: Linings and flow channels in smelting furnaces for zinc, aluminum, copper, and other non-ferrous metals.

5. Ceramics and building materials: High-grade ceramic sintering kiln furniture (crucibles, support plates) and ceramic glaze frit furnace linings.

6. Chemical and environmental protection: Highly corrosive environments such as waste incinerators and hazardous waste treatment furnaces.

Zhengzhou Chaoyu Refractory Materials Co., Ltd. provides customers with professional zirconia brick product solutions and comprehensive services:

High-Quality Raw Material Assurance: Strictly screened and pre-fired high-purity zirconia raw materials ensure stable product performance.
Customized Production: Manufacture complex-shaped and special-type bricks according to client kiln blueprints.
Advanced Process Control: Employ high-pressure forming and precise temperature-controlled firing to achieve optimal density and performance.
Comprehensive Technical Testing: Equipped with a fully-fledged testing laboratory, rigorously inspecting chemical composition, physical properties, and microstructure of each batch to meet international standards like ASTM and JIS.
Professional Technical Support: We provide comprehensive technical assistance and consulting services throughout the entire process—from material selection and bricklaying design to usage and maintenance.
Reliable Delivery System: With stable production capacity and an efficient logistics network, we ensure timely and secure delivery of products to global customers.

For detailed technical documentation, samples, or customized selection guidance for your specific operating conditions, please visit our official website or contact our dedicated sales engineering team. Zhengzhou Chaoyu Refractories Co., Ltd. is committed to delivering exceptional products and professional services to provide long-term, stable protection for your critical high-temperature equipment.