Carbon baking furnaces operate at temperatures as high as 1250 °C, with each baking cycle lasting 320 to 420 hours. Under such demanding conditions, the thermal insulation performance of the furnace cover is critically important. In practical operation, traditional refractory brick furnace covers have exposed a number of shortcomings:
First, the furnace cover must be opened and closed frequently during production. Clay-based refractory bricks have poor thermal shock resistance and are highly prone to cracking under rapid heating and cooling. These cracks allow flames to penetrate the lining and damage the furnace steel structure, not only shortening equipment service life but also causing significant heat loss.
Second, refractory brick furnace covers are extremely heavy. The total lifting weight often exceeds 20 tons, requiring overhead cranes with a lifting capacity of up to 30 tons. This greatly increases capital investment and operational complexity.
To reduce energy consumption, extend furnace cover service life, and improve overall thermal efficiency, furnace covers made with lightweight ceramic fiber modules have become the preferred solution in the industry.
Structure of the Ceramic Fiber Insulated Furnace Cover
The furnace cover features an external steel plate shell. The internal insulation system is a composite structure consisting of a 30 mm thick zirconia-containing ceramic fiber blanket laid flat, combined with 180 mm thick ceramic fiber modules. All components are securely fixed using heat-resistant steel members of the 310 series.
Key Advantages of Lightweight Ceramic Fiber Module Furnace Covers
Compared with traditional refractory brick furnace covers, ceramic fiber module covers offer the following significant advantages:
Substantially reduced weight: The overall weight is only about one-sixth of the original cover, greatly reducing lifting and handling loads.
Low thermal conductivity and fast thermal response: Excellent insulation performance combined with rapid heating and cooling capability significantly improves temperature control responsiveness and efficiency.
Outstanding thermal shock resistance: Capable of withstanding frequent and severe temperature fluctuations without cracking, ensuring long-term structural durability.
Superior installation and sealing performance: Modular design allows easy installation, high structural integrity, and excellent airtightness, effectively minimizing heat loss.
Practical testing has shown that after adopting the new ceramic fiber module furnace cover, heat dissipation losses are significantly reduced, resulting in a tangible improvement in overall energy efficiency and operating economy.
