The pusher-type continuous heating furnace is a commonly used continuous heating device in the metallurgical industry, widely applied for reheating initial rolled billets such as steel billets and slabs. The structure is typically divided into preheating, heating, and soaking zones, with maximum operating temperatures reaching up to 1380°C. Although the furnace operates continuously with relatively low heat storage loss, frequent start-stop cycles and significant thermal load fluctuations—especially in the backing insulation area—demand more advanced insulation materials.
The CCEWOOL thermal insulation blanket (ceramic fiber insulation blanket), with its lightweight and highly efficient thermal performance, has become the ideal backing insulation material for modern pusher furnaces.
Advantages of CCEWOOL Ceramic Fiber Blanket
CCEWOOL ceramic fiber blankets are made from high-purity raw materials using a spun fiber and needling process. They offer the following features:
High temperature resistance: Operating temperature ranges from 1260°C to 1350°C, adaptable to different furnace zones.
Low thermal conductivity: Enhances furnace shell temperature control and reduces heat loss.
Low heat storage: Enables faster heating and cooling, aligning with process cycles.
Good flexibility: Easy to cut and lay, adaptable to complex structures.
Excellent thermal stability: Resilient to frequent start-stop cycles and thermal shock.
CCEWOOL also offers a variety of densities and thicknesses to suit modular systems or composite structure designs.
Typical Application Structures
Preheating Zone (800–1050°C)
A “fiber blanket + module” structure is used. The fiber blanket is laid in 24 layers as backing insulation, with the surface layer formed from angle iron or suspended modules. The total insulation thickness is approximately 250mm. Installation uses forward alignment and U-shaped compensation layers to prevent thermal expansion and contraction.
Heating Zone (1320–1380°C)
The surface is lined with high-alumina bricks or castables, while the backing uses CCEWOOL high-temperature ceramic fiber blankets (40–60mm thick). The furnace roof backing uses 30–100mm ceramic fiber blanket or board.
Soaking Zone (1250–1300°C)
High-purity ceramic fiber blanket is used as the insulation layer to reinforce heat insulation and control shrinkage. The structure is similar to the preheating zone.
Hot Air Ducts and Sealing Areas
Ceramic fiber blankets are used to wrap hot air ducts, and flexible fiber blankets are applied to sealing areas such as furnace doors to prevent heat loss.
Thanks to its excellent high-temperature resistance, low heat loss, and lightweight, easy-to-install properties, the CCEWOOL thermal insulation blanket has significantly improved energy efficiency, structural optimization, and operational stability in pusher-type continuous furnaces.
As a leading manufacturer of advanced refractory fiber materials, CCEWOOL’s product lines—including thermal blanket insulation and ceramic thermal blanket—are providing strong support in building a safer, more efficient, and environmentally friendly next-generation industrial furnace lining system for the metallurgical industry.
Post time: Apr-28-2025
