Ceramic Fiber Applications in the Glass Industry | HENGRUI High Temperature

Advanced Ceramic Fiber Solutions for Glass Tempering and Bending Furnaces

Ceramic fibre is essential in various industrial applications. Ceramic fiber materials play a crucial role in the glass deep-processing industry, widely used in glass tempering furnaces, glass bending furnaces, and other high-temperature insulation systems. With excellent thermal insulation, high-temperature resistance, and energy-saving performance, HENGRUI’s ceramic fiber products have become a reliable choice for modern glass manufacturing equipment.

Understanding the Glass Tempering Process

Before designing an insulation system for a glass tempering furnace, it’s essential to understand how the process works. Ceramic fibre becomes particularly important when examining this process.

In glass tempering, flat glass is heated to approximately 650°C, close to its softening point. The glass is then rapidly cooled by high-pressure air, creating compressive stress on the surface and tensile stress inside. This stress balance significantly increases the glass’s mechanical strength and thermal resistance, reducing the risk of breakage.

Tempering furnaces can vary by size and type, including intermittent or continuous systems, hanging or horizontal configurations, and electric or gas heating modes. Typical glass sizes range from 4 meters to 10 meters, depending on product specifications.

Thermal Insulation Design for Tempering Furnaces

The internal chamber temperature of a glass tempering furnace typically reaches 800°C, with heat supplied through electric resistance heating. To maintain stable operation and minimize energy loss, high-performance ceramic fiber insulation materials are applied to both the insulation layer and the hot face lining. The inclusion of ceramic fibre is pivotal for achieving high insulation quality.

HENGRUI Recommended Structure:

• Working Layer (Hot Face): 1350°C High-Alumina Ceramic Fiber Board
• Insulation Layer (Backing): 1260°C Standard Ceramic Fiber Board

This configuration provides outstanding thermal insulation, reduces furnace shell temperature, and helps achieve uniform heat distribution — essential for consistent glass quality during tempering and bending processes.

Advantages of HENGRUI Ceramic Fiber in Glass Furnaces

🔥 High Thermal Efficiency: Low thermal conductivity ensures effective energy retention.

⚙️ Excellent Dimensional Stability: Maintains shape and strength even under repeated heating cycles.

💡 Lightweight Structure: Reduces furnace load, extending equipment life and improving heating response.

🌱 Energy Saving & Eco-Friendly: Helps lower operational energy consumption by up to 30% compared to traditional refractories.

Proven Applications

HENGRUI ceramic fiber insulation systems are widely used in:

• Glass tempering furnaces (electric & gas-heated)
• Glass bending furnaces
• Continuous glass processing lines
• Thermal treatment and annealing equipment

Our solutions support the production of tempered glass, architectural safety glass, and automotive glass, contributing to higher production efficiency and superior product quality through advanced ceramic fibre usage.

Conclusion

With over a decade of expertise in refractory and high-temperature insulation materials, HENGRUI High Temperature Energy-Saving Materials Co., Ltd. provides complete ceramic fiber solutions for the glass industry — from design to installation.

Our custom-engineered insulation systems ensure optimal performance, long service life, and measurable energy savings, helping glass manufacturers meet modern demands for efficiency, sustainability, and quality.