Aluminum Silicate Fiber Board 1260°C – Rigid Ceramic Fiber Insulation for Industrial Furnaces

Aluminum Silicate Fiber Board Application Scenarios

• Aluminum Silicate Fiber Board in Industrial Furnaces and Heat Treatment Lines

  ✅Key Advantages

  1. Stable furnace lining for 1260°C cycles
  Aluminum silicate fiber board forms a rigid insulation layer that withstands repeated heat treatment cycles up to around 1000–1100°C in many continuous and batch furnaces.

  2. Reduced shell temperature and heat loss
  With thermal conductivity around 0.12–0.17 W/m·K at 600°C, the board helps keep steel shell temperatures at safer levels and improves furnace energy efficiency.

  3. Shorter installation time compared to brick linings
  Large-format aluminum silicate fiber boards cover more area per piece than traditional bricks, reducing installation and repair time on furnace walls and doors.

  ✅ Problem Solved

  A heat treatment furnace operator replacing part of a traditional brick back-up layer with aluminum silicate fiber board can often reduce external shell temperature by 20–40°C on critical surfaces, lowering heat loss and improving working conditions near the furnace. In a line operating continuously, energy assessments have shown insulation upgrades of this type contributing to fuel savings in the range of 3–5% for certain applications when combined with other measures. Maintenance teams also report shorter shutdowns, because pre-cut board panels can be installed and aligned more quickly than small refractory bricks on vertical walls.

• Aluminum Silicate Fiber Board in Metal Casting and Non-Ferrous Melting

  ✅Key Advantages

  1. Lightweight lining for aluminum and copper holding furnaces
  Aluminum silicate fiber board provides a rigid back-up layer behind refractory hot face linings in aluminum and copper holding furnaces, reducing overall refractory weight.

  2. Improved temperature stability around launder and trough sections
  The board’s low thermal conductivity supports more uniform metal temperature along launders and transfer channels.

  3. Easier access and replacement for localized repairs
  Damaged sections of aluminum silicate fiber board near furnace doors or launders can be replaced in panels, limiting the area that needs demolition.

  ✅ Problem Solved

  In non-ferrous foundries running multiple aluminum holding furnaces, energy audits often identify heat loss through doors and upper sidewalls as a significant factor in metal temperature fluctuations. By upgrading these areas with aluminum silicate fiber board of appropriate thickness, operators can reduce temperature variation at the metal surface during holding and transfer, supporting more consistent casting quality. When furnace doors or launders require lining repair, maintenance staff can cut and replace single panels rather than demolishing a thicker brick layer, shortening downtime windows that may otherwise lead to production losses.

• Aluminum Silicate Fiber Board in Boilers, Incinerators and Energy Systems

  ✅  Key Advantages

  1. Back-up insulation for boiler and incinerator walls
  Aluminum silicate fiber board is used as a rigid back-up layer behind hot face refractories in combustion chambers, limiting heat transfer to the steel casing.

  2. Support for emission and efficiency upgrades
  Improved insulation helps maintain steady combustion temperatures, supporting efficient fuel burnout and better process stability in waste and biomass systems.

  3. Reduced external surface temperature for operator safety
  The board contributes to lower casing temperatures, improving compliance with workplace temperature guidelines around boilers and incinerators.

  ✅  Problem Solved

  In retrofit projects for waste incinerators or small biomass boilers, engineers often need to upgrade insulation without significantly increasing the total thickness of the lining. Replacing older, heavier back-up materials with aluminum silicate fiber board allows similar or improved thermal resistance at lower weight, supporting structural checks on the casing and support steel. Measurements after retrofit frequently show casing temperature reductions that help meet site safety criteria and allow operators to work closer to the boiler walls during inspection and maintenance activities.

Aluminum Silicate Ceramic Fiber Board Usage Guide

• Installation

  1. Confirm that the supporting steel or refractory surface is clean, dry and free of loose debris before installing aluminum silicate fiber board.
  2. Plan the panel layout so that joints are staggered, and cut boards accurately to achieve tight-fitting joints with minimal gaps.
  3. Fix boards using suitable anchors, screws or adhesives designed for ceramic fiber products, avoiding excessive mechanical stress on individual panels.
  4. Where tongue-and-groove or chamfered edges are used, orient the panels consistently to minimize heat leakage lines.

• Operation and Use

  1. Use aluminum silicate fiber board within the recommended continuous service temperature for the selected grade, allowing a margin below its classification temperature.
  2. During initial heating, follow a controlled heating schedule if specified, so that binders can burn out gradually and steam can escape without causing cracking.
  3. Avoid direct flame impingement on the board surface unless the design and grade have been selected for that specific duty.

• Storage

  1. Store aluminum silicate fiber board indoors or under cover to protect it from rain and standing water.
  2. Keep panels on flat pallets or shelves to prevent bending and warping during long-term storage.
  3. Maintain original wrapping as long as possible to limit dust and contamination until installation.

• Cleaning and Maintenance

  1. Remove loose dust with a soft brush or low-pressure vacuum fitted with appropriate filtration to prevent fiber release into the workplace.
  2. Inspect panel joints and anchor locations during scheduled shutdowns, and replace damaged or eroded sections before they affect the main lining.
  3. When cutting or trimming in the workshop, use appropriate dust extraction and personal protective equipment according to local guidelines for handling ceramic fibers.

• Common Misuse and Correction

  1. Using the board above its classification temperature
  Misuse: Selecting a 1050°C or 1260°C aluminum silicate fiber board for continuous service close to or above its classification temperature.
  Correction: Choose a grade with a higher classification temperature and adjust lining design to keep the board within a suitable operating range.

  2. Over-tightening mechanical fixings
  Misuse: Applying anchors, screws or clamps with excessive force, leading to localized compression and cracking.
  Correction: Follow recommended fixing spacing and torque, and consider using washers or clips that distribute load across the board surface.

  3. Outdoor storage without protection
  Misuse: Leaving pallets of aluminum silicate fiber board exposed to rain, which can introduce moisture and weaken the binder near the surface.
  Correction: Store under a roof or waterproof cover, and if panels are exposed, allow sufficient drying during preheating or replace visibly damaged boards.

FAQ – Aluminum Silicate Ceramic Fiber Board

1. Q: What is aluminum silicate fiber board used for in industrial furnaces?
   A: Aluminium silicate fiber board is used as a rigid high temperature insulation layer in the walls, doors and roofs of industrial furnaces, kilns, boilers and incinerators to reduce heat loss and lower shell temperature.
2. Q: What temperature can aluminum silicate fiber board withstand?
   A: The classification temperature of aluminum silicate fiber board is typically 1050°C, 1260°C or up to around 1350–1430°C depending on grade, with recommended continuous service kept below these values for long-term stability.
3. Q: How does aluminum silicate fiber board differ from ceramic fiber blanket?
   A: Aluminum silicate fiber board is a rigid, pre-formed panel with higher compressive strength and dimensional stability, while ceramic fiber blanket is flexible; the board is preferred where flat surfaces, mechanical fixing and defined thickness are needed.
4. Q: Is aluminum silicate ceramic fiber board suitable for boiler insulation?
   A: Yes, aluminum silicate ceramic fiber board is commonly used as a back-up insulation layer in industrial boilers and combustion chambers, behind hot face refractory materials or metal liners.
5. Q: How do I select the thickness of aluminum silicate fiber board for my furnace?
   A: Thickness selection depends on target shell temperature, operating temperature and available space; many industrial furnaces use 25–50 mm of aluminium silicate fiber board as part of a multi-layer lining design.
6. Q: Can aluminum silicate fiber board be machined or cut to complex shapes?
   A: Aluminium silicate fibre board can be cut with hand tools or machine tools to create openings, chamfers and stepped profiles, and can be supplied as custom-shaped parts based on customer drawings.

Aluminum Silicate Fiber Board Reviews

• ⭐️⭐️⭐️⭐️⭐️
  We switched part of our furnace door lining to aluminum silicate fiber board from ADCERAX and noticed a clear reduction in shell temperature. The rigid ceramic fiber boards are easy to cut to size and have held up well after repeated cycles.
  -- Mark Jensen – Maintenance Manager, Nordic Steel Heat Treatment AB
• ⭐️⭐️⭐️⭐️⭐️
  For a boiler retrofit project we needed lightweight back-up insulation panels. The custom-sized aluminum silicate ceramic fiber boards arrived according to our drawings, which helped us keep the shutdown within the planned schedule.
  -- Laura Martínez – Project Engineer, Iberia Thermal Systems
• ⭐️⭐️⭐️⭐️⭐️
  ADCERAX supplied aluminum silicate fiber board in several densities for different areas of our kilns. The dimensional tolerances were consistent, and our installation team appreciated the clean cuts and stable surfaces.
  -- Kevin Park – Purchasing Supervisor, Seoul Industrial Furnace Co.
• ⭐️⭐️⭐️⭐️⭐️
  We use aluminum silicate ceramic fiber insulation board from ADCERAX in various furnace repair jobs. The combination of low thermal conductivity and rigid structure works well for door panels and back-up layers behind castables.
  -- David Collins – Technical Director, Refractory Service Solutions Ltd.