Ceramic Fiber Board

Introduction

 

Ordinary ceramic fiber, also known as alumino-silicate fiber, is referred to as "ceramic fiber" because alumina-one of its main components-is also the primary component of porcelain. Adding zirconia or chromium oxide can further increase the service temperature of ceramic fiber.

Ceramic fiber products are industrial materials made from ceramic fibers, characterized by being lightweight, highly resistant to high temperatures, having excellent thermal stability, low thermal conductivity, low specific heat, and strong resistance to mechanical vibration. They are specifically designed for various high-temperature, high-pressure, and high-wear environments.

As excellent refractory materials, ceramic fiber products offer advantages such as low weight, high-temperature resistance, low heat capacity, superior thermal insulation, excellent high-temperature stability, and non-toxicity.

Low Thermal Conductivity and High Thermal Resistance

Thermal conductivity is only 1/3 to 1/5 that of traditional refractory bricks, significantly reducing the temperature of furnace walls.

Low Heat Storage and Rapid Heating Capacity

Heat storage is just 1/10 that of refractory bricks (e.g., a 200 kg/m³ fiber board has a heat storage of 0.8 kJ/(m²·K), while refractory bricks reach 8 kJ/(m²·K)).

Kiln heating speed increases by 30–50%, shortening heat treatment cycles and boosting production efficiency.

Superior Compressive Strength over Fiber Blankets

Compressive strength reaches 1.5–3.0 MPa, enabling direct use as a load-bearing furnace lining to support refractory bricks or other equipment components.

Flexural strength of 0.8–1.5 MPa resists breakage, making it suitable for industrial environments with vibration.

Thermal Shock Resistance for Sudden Temperature Changes

The interwoven fiber structure and porous design buffer thermal stress, preventing cracking caused by thermal expansion and contraction.

Withstands sudden temperature changes exceeding 800°C without cracking, ideal for kilns with frequent start-stops.

Acid-Alkali Corrosion and High-Temperature Oxidation Resistance

Resists corrosion from acidic gases (SO₂, HCl) and alkaline atmospheres (K₂O, Na₂O).

Zirconium-containing fiber boards (15% ZrO₂) maintain structural stability in oxidizing atmospheres up to 1400°C, with no significant crystalline phase transition.

Resistance to Metal Melt and Slag Erosion

Exhibits excellent tolerance to molten aluminum, copper, and other metal melts, making it suitable as a lining material for non-ferrous metal smelting furnaces to reduce the risk of melt contamination.

Lightweight and Fast Installation

With a density of 180–400 kg/m³ (compared to refractory bricks at 2000–2800 kg/m³), it reduces equipment weight by 60–80%, minimizing the load on steel structures.

Installation efficiency is more than 4 times higher than refractory brick masonry. It can be cut, drilled, or slotted on-site to fit complex furnace shapes.

No Hazardous Substance Release

Contains no asbestos, heavy metals, or other hazardous substances. Compliant with the EU RoHS Directive, it emits no toxic gases at high temperatures.

 

Zinfon Refractory Technology Co.,Ltd.

 

We provide one-stop services from technical consultation to design, production, and after-sales support.

Manufacturer Direct

Factory Prices

Premium Service

Customization Available

Raw Materials

Bauxite (Al₂O₃)

Provides alumina, the structural component of ceramic fiber boards, accounting for 40%–60%. Its purity directly affects refractoriness.

Silica (SiO₂)

Provides silicon dioxide, accounting for 30%–50%. It combines with alumina to form an alumina-silica glass phase or mullite crystals, giving the board flexibility and chemical stability.

Requirement: Quartz sand with >99% purity and impurity content (Fe₂O₃, CaO) <0.5% to avoid reduced refractoriness.

Zircon Sand (ZrO₂·SiO₂)

Added at 10%–20% in high-end zirconium-containing boards to enhance refractoriness (up to 1400–1600°C) and improve thermal shock and slag erosion resistance.

 

Process Flow

Raw material selection and proportioning → Melt preparation → Fiberization (blowing method, centrifugal spinning method) → Fiber collection and treatment → Slurrying and forming (wet forming, dry forming) → Drying → Sintering and curing → Surface treatment and cutting.

 

Process Advantages

Highly controllable: Customizes different properties (e.g., high-density fire-resistant, low-density thermal-insulating) by adjusting raw material ratios and process parameters (e.g., fiberization method, sintering temperature).

Used for thermal insulation in blast furnace linings, reheating furnace walls, and annealing furnace insulation layers, withstanding 1000–1400°C to reduce heat loss and improve furnace efficiency.

Insulates high-temperature components (e.g., combustion chambers, flues) in coal-fired boilers and gas turbines, resisting flue gas corrosion and minimizing heat dissipation.

Serves as lining material and flue gas pipeline insulation in incinerators, withstanding 800–1200°C and corrosive gases (e.g., HCl, SO₂) to reduce heat conduction to the furnace body.

Provides thermal insulation for high-temperature sections of hydrogen production equipment (e.g., electrolyzers), resistant to alkaline electrolytes.

Insulates the roofs and walls of glass furnaces, minimizing heat loss from molten glass, and enhances sintering uniformity in ceramic kilns.

Insulates high-temperature areas of reaction kettles and distillation towers, resistant to organic media and corrosive gases (e.g., chlorine, sulfides).

Replaces traditional rock wool boards for insulation in industrial plant roofs and walls, suitable for environments at 200–600°C.

Core Advantages Summary

Ceramic fiber boards offer low density, high thermal insulation, a wide working temperature range (200–1400°C), and excellent thermal shock resistance. They are indispensable in scenarios that require a balance of high temperature, insulation performance, and lightweight construction-especially in corrosive or precision temperature control environments where traditional materials (e.g., refractory bricks, rock wool) fall short.

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