Ceramic fiber modules, especially zirconia-containing types, are increasingly used in high-temperature metallurgical furnaces due to their superior insulation performance, energy efficiency, and ease of installation. Below is an analysis of their key advantages and installation guidelines:
01 Key Advantages of Zirconia-Containing Modules for Metallurgical Furnaces
(1) Lightweight: As a type of lightweight refractory, ceramic fiber modules have only one-fifth the density of traditional castables. This significantly reduces the structural load on the furnace, extending its service life.
(2) High Flexibility: The modules are pre-compressed during manufacturing. After installation and removal of the packing strips, the lining expands in multiple directions, creating a tight seal that resists mechanical stress and compensates for shell deformation.
(3) Low Thermal Conductivity: With excellent resistance to thermal shock, ceramic fiber linings act as near-perfect insulators, minimizing heat loss and reducing fuel consumption.
(4) Diverse Anchoring Systems: A variety of anchoring options at the back of folded modules allow flexibility in different furnace conditions.
(5) Low Initial Investment: Once installed, the lining requires no drying or curing period and can be put into immediate operation.
02 Installation Guidelines for Zirconia-Containing Ceramic Fiber Modules
(1) When installing backing layers in composite linings, ensure the material is evenly compressed to the designed density and thickness. For multiple layers, stagger the joints by at least 100 mm.
(2) Select anchors based on the module structure and dimensions. During welding, the vertical deviation of anchors should be less than 3 mm. Any dimensional inaccuracies should be adjusted in the subsequent rows.
(3) At junctions between ceramic fiber modules and brickwork or other refractories, especially in non-folded directions, use folded ceramic fiber blankets to fill gaps caused by thermal contraction of adjacent materials. This prevents heat leakage and protects the steel structure.
(4) In row-based lining layouts, compress and fill shrinkage gaps between different rows with folded ceramic fiber blankets. When used in furnace roofs, secure the structure with heat-resistant alloy "U-pins".
