Flexible Aluminum Silicate Ceramic Fiber Paper for Heat Treatment Equipment

Aluminum Silicate Fiber Paper Applications

• Aluminum Silicate Fiber Paper in Industrial Furnaces & Heat Treatment

  ✅Key Advantages

  1. Precise sealing of furnace doors and access ports
  Provides a compressible sealing layer between metal doors and refractory linings, reducing heat loss and air infiltration at temperatures up to 1260 °C.

  2. Thin back-up insulation behind dense refractories
  Adds a low-thickness thermal break behind refractory bricks or castables, improving shell temperature control without major redesign.

  3. Stable performance during thermal cycling
  Resists thermal shock and mechanical vibration in repeated heat-up and cool-down cycles typical of batch furnaces and heat treatment lines.

  ✅ Problem Solved

  A heat treatment plant operating several batch furnaces at 900–950 °C used rigid brick linings and loose ceramic fiber strips at the door interface. In practice, door leakage caused uneven temperature near the charge and increased gas consumption. After replacing the loose strips with 3 mm aluminum silicate fiber paper gaskets, door leakage was reduced, temperature uniformity improved by about 10–15 °C across the working zone, and fuel consumption decreased by approximately 3–5% based on their own metering. Maintenance intervals for door seals extended from monthly checks to quarterly inspections.

• Aluminum Silicate Fiber Paper in Non-Ferrous Metal Casting & Launder Systems

  ✅Key Advantages

  1. Clean separation and gasketing around launder covers
  Forms a stable sealing layer between launder lids, trough sections and filter boxes, helping control heat loss and metal temperature.

  2. Low wetting by molten aluminum
  Proper alumina–silica paper grades show low reactivity with molten aluminum alloys, which helps maintain clean metal and reduces build-up on sealing surfaces.

  3. Fast replacement during maintenance stops
  Paper gaskets and strips can be quickly removed and replaced, shortening casting line downtime during scheduled stops.

  ✅ Problem Solved

  An aluminum casting line running at metal temperatures around 700–730 °C experienced frequent leakage of metal fumes near launder covers, making local working conditions difficult and forcing unplanned shutdowns. Switching from rigid fiberboard seals to 2–3 mm aluminum silicate fiber paper gaskets cut on-site to size allowed the maintenance team to achieve more uniform compression and tighter seals. Over the following six months, unplanned stops related to launder sealing were reduced by more than 50%, and operators reported visibly lower fume escape around the covers.

• Aluminum Silicate Fiber Paper in Glass & Ceramic Kilns

  ✅  Key Advantages

  1. Interface layer for protecting product surfaces
  Acts as a soft contact layer between kiln furniture and delicate glass or ceramic ware, helping reduce surface marks and chipping.

  2. Thermal break at kiln doors and observation ports
  Provides thin thermal insulation around doors, peep holes and burner blocks without adding much thickness to the design.

  3. Support for controlled cooling and temperature gradients
  In multi-zone kilns, strips of aluminum silicate fiber paper can be used to fine-tune heat flow and reduce hot spots or cold areas along the ware path.

  ✅  Problem Solved

  A glass bending kiln for architectural glass had persistent complaints about minor surface impressions where glass contacted kiln furniture. By adding a 1–2 mm layer of aluminum silicate fiber paper between the refractory supports and the glass, visible impressions were reduced in more than 80% of panels. Scrap due to surface marking dropped from roughly 5% of production to below 1%, with no major change to cycle time.

Usage Guide – Aluminum Silicate Fiber Paper

• Installation

  1. Cut aluminum silicate fiber paper using a sharp knife, scissors or die to the required size, keeping edges clean and square.
  2. Install the paper on clean, dry metal or refractory surfaces; remove loose dust, scale or old gasket residues before installation.
  3. For vertical or overhead applications, temporary mechanical fixing (clips, pins or light adhesive dots outside the hot face) helps positioning before compression.

• Use

  1. Ensure the paper is compressed evenly when used as a sealing layer; excessive local compression can reduce service life.
  2. During first heat-up, increase temperature gradually so the organic binder can burn off without causing blistering. Follow your furnace commissioning curve.
  3. For frequent door operations, check seal condition regularly; replace sections that show cracking, severe compression set or mechanical damage.

• Storage

  1. Store rolls and sheets in their original packaging, in a dry, ventilated area away from direct sunlight or water.
  2. Keep material off the floor on pallets or racks to avoid moisture uptake and mechanical damage.
  3. Avoid stacking heavy items on top of paper cartons to prevent distortion of thin grades.

• Cleaning and Maintenance

  1. For light dust, gently brush or blow with dry compressed air before installation.
  2. Do not wash the paper with water or solvents; moisture may change its structure and drying may not be uniform.
  3. Remove and discard heavily contaminated or chemically attacked pieces instead of reusing them.

• Common Misuse and Practical Solutions

  1. Misuse: Over-tightening doors or flanges until the paper is fully crushed
  Result: Loss of elasticity and sealing performance after a few cycles.
  Solution: Adjust closing mechanisms to compress the gasket within a recommended percentage of its original thickness rather than to a fixed mechanical stop.

  2. Misuse: Rapid heat-up on first use with thick layers of paper
  Result: Sudden binder burnout causing local swelling, smoke and surface defects.
  Solution: Use a staged heat-up program for new linings and gaskets, allowing organic binder to burn off in a controlled way.

  3. Misuse: Using low-temperature grade paper above its classification temperature
  Result: Excessive shrinkage, embrittlement and premature failure.
  Solution: Match aluminum silicate fiber paper grade to the maximum operating temperature and atmosphere; use high-temperature grades when continuous exposure is near 1260 °C or higher.

Aluminum Silicate Ceramic Fiber Paper FAQ

1. Q: What is aluminum silicate fiber paper used for in industrial furnaces?
   A: Aluminum silicate fiber paper is used as a thin high-temperature insulation and sealing layer in industrial furnaces, including furnace door gaskets, peep-hole seals, burner block interfaces and back-up insulation behind refractory bricks.
2. Q: What is the maximum service temperature of aluminum silicate fiber paper?
   A: Standard aluminum silicate fiber paper is typically classified for continuous service up to around 1260 °C, with special grades available for higher temperatures when required by the process.
3. Q: Can aluminum silicate fiber paper be die-cut into complex gasket shapes?
   A: Yes, aluminum silicate fiber paper can be die-cut or water-jet cut into rings, flanges and complex gaskets, which makes it suitable for access doors, inspection covers and expansion joints.
4. Q: Is aluminum silicate fiber paper suitable for contact with molten aluminum?
   A: Properly selected aluminum silicate fiber paper shows low wetting by molten aluminum and is often used as a separation and sealing material around launder covers and distribution boxes in casting lines.
5. Q: How does aluminum silicate fiber paper compare with ceramic fiber blanket?
   A: Aluminum silicate fiber paper is much thinner and denser than ceramic fiber blanket, giving a smoother surface and better sealing capability in narrow gaps, while blanket is preferred where thicker insulation layers are needed.
6. Q: Does aluminum silicate fiber paper contain asbestos?
   A: No, modern aluminum silicate fiber paper is asbestos-free and manufactured from alumina–silica fibers with carefully controlled shot content and organic binder.

Aluminum Silicate Ceramic Fiber Paper Reviews

• ⭐️⭐️⭐️⭐️⭐️
  During our furnace refurbishment project we needed thin insulation layers that could be installed without modifying the steelwork. The aluminum silicate fiber paper supplied by ADCERAX provided the exact thickness and density we specified. It bonded smoothly behind our refractory tiles and allowed us to achieve the shell temperature drop required by the engineering team.
  -- Emma Rodriguez, Furnace Rebuild Coordinator, NorthBridge Thermal Solutions
• ⭐️⭐️⭐️⭐️⭐️
  Our casting line requires frequent replacement of sealing materials around the filter box. The aluminum silicate fiber paper from ADCERAX has been stable in shrinkage and is easier to cut into precise strips compared with the previous supplier. This consistency helped cut our maintenance time by nearly half during scheduled stops.
  -- David Chen, Senior Process Engineer, Pacific Alloy Components
• ⭐️⭐️⭐️⭐️⭐️
  We use aluminum silicate fiber paper as an interface layer around electric heating elements. What stood out was its uniform thickness, which allowed us to maintain tight tolerances in our assembly. The dielectric stability at elevated operating temperatures has been reliable across multiple production batches.
  -- Sofia Müller, Quality & Reliability Specialist, ThermoKraft Industrial Heating
• ⭐️⭐️⭐️⭐️⭐️
  We were looking for a compressible gasket material that could tolerate the constant opening and closing of furnace doors. ADCERAX recommended a suitable grade of aluminum silicate fiber paper, and after months of use we noticed better heat retention and fewer temperature alarms during production. The material holds its shape well even after repeated cycles.
  -- Robert Hayes, Operations Manager, SteelCore Heat Treatment Centre