Unfired Clay Brick Natural Clay Refractory Brick for Kiln Furnace Construction

Product Description

Product Description

Fireclay refractory bricks are high-quality refractory materials manufactured from selected fireclay and refractory aggregates through high-temperature firing. These bricks offer excellent thermal stability, high refractoriness, and good resistance to thermal shock.

Due to their stable chemical composition and mechanical strength, fireclay bricks are widely used in industrial furnaces, boilers, kilns, and high-temperature equipment linings.

Fireclay bricks provide reliable insulation and structural strength for high-temperature environments. Their excellent durability and cost-effectiveness make them one of the most commonly used refractory materials in the steel, cement, glass, and petrochemical industries.

With good resistance to abrasion and thermal cycling, fireclay bricks maintain stable performance under long-term high-temperature operation.

Features

High Temperature Resistance
Fireclay bricks can withstand temperatures up to 1400°C–1700°C, depending on the alumina content and grade.

Good Thermal Shock Resistance
The bricks maintain structural integrity under rapid heating and cooling conditions.

Excellent Mechanical Strength
Fireclay refractory bricks offer high compressive strength and abrasion resistance.

Stable Chemical Performance
They show strong resistance to slag, corrosion, and chemical attack in industrial environments.

Cost-Effective Refractory Material
Compared with high-alumina bricks, fireclay bricks offer reliable performance at a more economical price.

Wide Application Range
Suitable for various industrial furnaces, kilns, and high-temperature equipment.

Applications

Steel Industry
Reheating furnaces, soaking pits, and heat treatment furnaces.

Cement Industry
Rotary kilns, preheater systems, and kiln inlet sections.

Glass Industry
Glass furnace structures and insulation layers.

Ceramic Industry
Ceramic kilns and high-temperature firing furnaces.

Power Plants
Boiler linings and high-temperature equipment insulation.

Petrochemical Industry
Reactor furnaces and cracking furnaces.

Description		DN-17	DN14	DN12	SK34	SK33	SK32
Refractoriness  (SK)		34	34	34	34	33	32
Bulk density (g/cm3)		2.25	2.34	2.40	2.20	2.17	2.15
Cold Crushing Strength (MPa)		50	65	70	40	35	30
Apparent Porosity(%)		17	14	12	23	24	26
Permanent linear change  @1400ºC*2hrs(%)		±0.1~-0.2	±0.1~-0.2	±0.1~-0.2	±0.3	±0.5	±0.5
Thermal Linear expansion @1000ºC		0.6	0.6	0.5	0.6	0.6	0.6
Refractoriness under Load (ºC)@0.2MPa		1430	1470	1500	1350	1300	1250
Chemical Analysis (%)	Al2O3	42	45	46	42	38	35
	Fe2O3	1.7	1.5	1.3	2.0	2.2	3.0

1.What is the difference between SK32 and SK34 fireclay bricks?
SK34 bricks contain higher alumina content and have better refractoriness compared with SK32 bricks.

2.What is the standard size of fireclay bricks?
The standard size is 230 × 114 × 65 mm, but customized sizes can also be produced.

3.Can you produce special-shaped refractory bricks?
Yes, we can manufacture customized shapes according to drawings or furnace design requirements.

4.What industries use fireclay bricks?
Fireclay bricks are widely used in steel plants, cement plants, glass furnaces, and ceramic kilns.