PRODUCT DESCRIPTION

Zero Expansion Silica Brick

Description

Zero expansion silica bricks are high-performance refractories engineered from premium high-purity fused silica. By locking in a predominantly amorphous, non-crystalline quartz matrix during a specialized manufacturing process, these bricks exhibit a linear thermal expansion coefficient close to zero between room temperature and 1200°C. They are designed to solve the heavy industrial pain point of furnace thermal cracking, serving as the definitive global standard for emergency hot repairs without stopping operations or requiring preheating.

Advantages

l  Near-Zero Thermal Expansion: Displays virtually zero dimensional change during rapid heat-up. This eliminates unpredictable micro-cracking, joint opening, or lining stress distortions under sudden temperature surges.

l  Extreme Thermal Shock Resistance: Can be directly inserted into an operating furnace at 1000°C to 1300°C from room temperature with zero cracking, zero spalling, and zero structural explosion.

l  No Preheating Required for Hot Repair: Eliminates time-consuming and energy-intensive furnace preheating protocols. Maintenance teams can repair damaged zones on the fly, drastically reducing furnace downtime and operational losses.

l  High Chemical Purity & Non-Contamination: Boasts a high SiO₂ content with ultra-low iron and alumina impurities. It prevents contamination or glass-melt discoloration, safeguarding end-product quality.

l  Excellent High-Temperature Creep Resistance: Maintains supreme structural load-bearing capacity and rigidity under continuous high-temperature environments, preventing sag or structural shifting over extended service campaigns.

Applications

Our Zero-Expansion Silica Bricks are universally deployed as the primary material for emergency maintenance, hot repair, and critical high-temperature thermal zones:

1. Coke Oven Hot Repair

• Application: Rebuilding combustion     chamber walls, oven doors, carbonization chambers, and charging holes.

• Value: Enables fast, hot-state     structural repairs while the oven is fully operational. It seals volatile     raw coal gas leaks immediately, preventing structural collapse and     extending the total coke oven service life.

2. Glass Melting Furnaces

·        Application: Hot-repairing of melting crowns, breast walls, port necks, thermocouple blocks, and tuckstones.

• Value: Safely patches     localized brick erosion or crown scaling during active production     campaigns without dropping furnace temperatures, avoiding multi-million     dollar glass-draining stoppages.

3. Metallurgical & Petrochemical Kilns

• Application: Thermal shock zones in     carbon baking furnaces, blast furnace hot stoves, and chemical reactors.

• Value: Provides an emergency     lining barrier that can withstand continuous gas erosion, heavy physical     impacts, and severe temperature fluctuations

   TECHNIQUE DATA