Application of Ceramic Fiber Modules in High-Temperature Metallurgical Furnaces

1. Key Advantages of Zirconia-Containing Ceramic Fiber Modules for High-Temperature Metallurgical Furnaces

•  Lightweight – Ceramic fiber modules are lightweight refractory materials, with a density only about 1/5 of castable refractories. This significantly reduces furnace body stress and helps extend furnace life.
• Good Elasticity – Pre-compressed ceramic fiber modules expand after removing the packing straps. The insulation layers compress in multiple directions, resisting mechanical forces and accommodating furnace shell deformation, forming a dense, seamless insulation system.
• Low Thermal Conductivity – Low thermal conductivity and excellent thermal shock resistance make the furnace walls near-adiabatic, minimizing heat loss and reducing fuel consumption.
• Flexible Anchoring Options – Various anchoring designs on the backside of folded modules provide adaptability for different furnace conditions.
• Low Installation Effort – Ceramic fiber module linings can be used immediately after installation, eliminating long drying or curing times.

2. Installation Guidelines for Zirconia-Containing Ceramic Fiber Modules in High-Temperature Metallurgical Furnaces

•  Backing Layer Installation – For composite linings using ceramic fiber modules with blanket backing, the backing layers should be evenly compressed to the required density and thickness. If multiple backing layers are applied, seams between layers must be staggered by at least 100 mm.
• Anchoring – The type and positioning of anchors depend on module structure and size. During welding, vertical deviation must be less than 3 mm, and dimensional deviations should be compensated in subsequent module rows.
• Interface with Other Refractory Materials – At connections between ceramic fiber modules and brick or other refractory linings, especially in the non-folding direction of folded modules, thermal expansion and shrinkage must be considered. Ceramic fiber blankets should be compressed into expansion gaps to prevent heat loss and protect steel structures.
• Composite Lining in Sequential Arrangements – For row-by-row arrangements, shrinkage joints between rows must be compressed using folded ceramic fiber blankets to compensate for fiber shrinkage. For roof applications, high-temperature alloy “U-shaped nails” must be used for secure fastening.