Fire clay bricks are shaped refractory materials made from refractory clay with 30–48% Al₂O₃, calcined at high temperature. They are widely used in standard furnace lining structures in industries such as metallurgy, power, chemical, and building materials, serving as foundation bricks for industrial furnaces and kilns.

      Fire clay bricks are mildly acidic refractory products, resistant to acidic slags and gases, but less resistant to alkaline substances. They exhibit good high-temperature resistance and withstand rapid heating and cooling. Their refractoriness is comparable to silica bricks, ranging from 1690 to 1730 °C, but their load softening temperature is over 200 °C lower than silica bricks, due to the presence of nearly half low-melting-point amorphous glass phase alongside high-refractory mullite crystals.

      Within a temperature range of 0–1000 °C, volume expands uniformly, with a nearly linear expansion rate of 0.6–0.7%, roughly half that of silica bricks. Above 1200 °C, the bricks begin to shrink from their maximum expansion, as low-melting-point components gradually melt and particles are held together by surface tension. Residual shrinkage may cause mortar joint loosening and cracking, which is a key limitation of clay bricks.

      Made from refractory clay with 40–48% Al₂O₃, fire clay bricks are widely used in industrial kilns such as power plant boilers, cement and lime kilns, chemical kilns, coking kilns, blast furnaces, and glass kilns, as well as in high-temperature equipment including circulating fluidized beds, hot blast stoves, steel ladle linings, and steel casting facilities.

●Packaging and Quality Control:
      To ensure fire clay bricks remain intact during transportation and storage, the company employs robust industrial packaging and standard handling procedures. Each batch undergoes thorough visual and dimensional inspections before packaging.

●Reinforced Packaging for Overseas Shipment:
      For international customers, a variety of reinforced packaging options are available, including fumigated wooden crates, steel-strapped frames, and reinforced pallets. These are designed to withstand vibrations, salt exposure, and container load pressure during long-distance sea transport, ensuring products arrive safely.

●Transportation Handling:

      Suitable for truck, container, or pallet forklift transport, all packaging has passed shock-resistance testing to prevent cracking or corner damage during handling.

●Storage Requirements:

      Store in a dry, well-ventilated warehouse with pallets or raised flooring to prevent water or ground moisture exposure, ensuring optimal product performance.

Q1: What is the refractoriness of fire clay bricks?
A: Typically 1680–1750 °C, suitable for medium and medium-high temperature applications.

Q2: Which industries are they suitable for?
A: Widely used in metallurgy, building materials, power, chemical, and other industries, including heating furnaces, incinerators, industrial boilers, and kiln linings.

Q3: Can they be used in conjunction with lightweight bricks or castables?
A: Yes. Often combined with lightweight mullite bricks, lightweight castables, and ceramic fiber modules to form energy-efficient composite furnace linings.

Q4: Do they support customization?
A: Yes. They can be processed into irregular bricks, arch bricks, wedge-shaped bricks, and even complex structures according to drawings.

Q5: What is their typical lifespan?
A: Under proper operating conditions, clay bricks provide stable operation, often extending service life by 15–25% compared to ordinary low-grade refractories.

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