SK32/34/36/38 Kiln Fire Clay Brick
Fire clay brick
Refractory clay brick is a common refractory material, which is
widely used in the high temperature environment of many industries,
including ceramic industry, cement industry, steel industry, power
industry, petrochemical industry, etc. Refractory bricks have many
Can work in high temperature environment
Good thermal shock resistance
High fire load
AL2O3 % (min)
Refractoriness under load, 0.2MPa, (°C)
Apparent porosity (%)
Bulk density (g/cm³)
Cold crushing strength (MPa)
Thermal expansion at 1000°C (%)
What is fire clay brick?
Refractory clay bricks refer to commodities with a long history as
refractory products. When referring to products, it refers to
materials that can still work in an environment with a temperature
higher than 1580°C without losing strength. Refractory clay brick
is an economical refractory brick because its cost is much lower
than that of high alumina brick. Although the cost of refractory
clay bricks is very low, it has many excellent functions like high
Where can I buy fire clay bricks?
China is a big country with a large amount of refractory minerals,
which is the key reason why refractory bricks are so cheap in
China. Many countries in China are providing refractory bricks.
Among them, LAURENT NEW MATERIALS is the leader. For two decades,
LAURENT NEW MATERIALS has been doing very well in China's
refractory industry. We have four sophisticated factories that
produce large quantities of refractory bricks every month. Our
hardworking workers and skilled technicians are determined to
overcome every difficult task provided by our customers. Our sales
company can provide customers with quality after-sales service and
create the best business experience.
Properties of fire clay bricks
Refractory clay brick is a weak acid refractory product. It can
resist acid slag and gas. The resistance of alkaline substances is
relatively poor. The bricks have good thermal properties and good
rapid quenching properties.
Fire clay brick composition
Refractory clay brick is an aluminate silicate refractory material.
The key component of high temperature resistance in refractory
bricks is alumina (30% to 40% of the total alumina). Refractory
clay bricks are made of 50% soft clay and 50% hard clay.
The main mineral components of refractory clay bricks are:
And 6%~7% foreign matter (including potassium, sodium, calcium,
titanium, iron oxides)
Manufacturing process of fire-resistant clay brick
This is the process of making refractory clay bricks. Choose raw
materials according to the particle size. Then the particles are
mixed with other substances according to the scientific
composition. After molding and drying, the material is sent to the
oven and heated to 1300~1400°C to complete the production process.
During the heating process, kaolinite continuously loses water and
decomposes into mullite crystals (3Al2O3•2SiO2). In this process,
SiO2 and Al2O3 react with other additives to form eutectic eutectic
silicate, and the reactant will be wrapped around the mullite
Refractory clay refractory brick VS silicate refractory brick
The melting point of refractory clay refractory bricks is almost
the same as that of silicate refractory bricks, between 1690 and
However, the refractoriness of refractory clay is lower than that
of silicate brick by more than 200°C. This is because in addition
to high melting point mullite crystals, some amorphous glass phases
with low melting points account for half of the total composition.