Analysis of the Difference Between Insulating Bricks and Refractory Bricks

The main role of insulation bricks is to keep heat and reduce heat loss. Insulation bricks are generally do not directly contact with the flame, and firebrick is usually in direct contact with flame. Firebricks are mainly used to withstand the flame of roasted. It is generally divided into two types, namely indefinite Unshaped refractory material and shaped refractory material.

Unshaped Refractory Material
The castables refractory material are mixed powdery particle composed of a variety of aggregates or aggregates and one or more binders. The use must be mixed with one or more liquids, with strong fluidity.

Shaped Refractory Material
In normal conditions, the shape of refractory bricks have a standard size, can also be customized according to customer requirements.

The Main Differences Between Insulation Bricks & Firebricks

1. Insulation Performance
The thermal conductivity of insulation bricks is generally 0.2-0.4 (average temperature 350±25°C)w/m.k, and the thermal conductivity of firebrick is above 1.0 (average temperature 350±25°C)w/m.k. Therefore, the thermal insulation performance of insulation brick is much better than that of fire bricks.

2. Refractoriness
The refractoriness of the insulating brick is generally below 1400 degrees, and the refractoriness of the refractory brick is above 1400 degrees.

3. Density
Insulation bricks are lightweight insulation materials, the density of insulation bricks is generally 0.8-1.0g/cm3 and the density of refractory bricks is basically above 2.0g/cm3.

In summary, the refractory brick has high mechanical strength, long service life, good chemical stability, no chemical reaction with the material and good high temperature resistance, and the maximum heat resistant temperature can reach 1900°C. Refractory bricks is particularly suitable for use in high-low temperature shift converters, reformers, hydrogenation converters, desulfurization tanks, and methanation furnaces of chemical fertilizer plants to play a role in dispersing gas liquids, supporting, covering, and protecting catalysts. Fire refractory bricks can also be used in hot stoves and heating conversion equipment in the steel industry.

Firebricks have the advantages of high density, high strength, wear resistance, good corrosion resistance, low thermal expansion coefficient, high grinding efficiency, low noise, long service life, and non-contaminating materials. It is a good grinding medium that is suitable for various grinding machines.

Refractory bricks and insulation bricks are very different, their use of the environment, scope and role are not the same. Different materials will be used in different locations. When purchasing materials, we have to decide which kind of refractory materials are suitable for our own use according to our actual situation.

Post time: Oct-22-2021