What are the differences between insulation bricks and refractory bricks?

The main function of the insulation brick is to keep warm and reduce the loss of hot stars. The insulation bricks generally do not directly contact the flame, and the refractory bricks directly contact the flame. Refractory bricks are mainly used to withstand the flame roasting. Generally divided into two types, namely, amorphous refractories and shaped refractories.

 

Unshaped refractory material:

Also known as castable, it is a mixed powdery granule composed of a variety of aggregates or aggregates and one or more binders. It must be mixed with - or a variety of liquids to be evenly mixed. fluidity. Shaped refractory materials: -Generally made refractory bricks, the shape of which has standard rules, and can be temporarily processed when needed.

The main differences between insulation bricks and refractory bricks are as follows:

1. Insulation performance

The thermal conductivity of the insulating brick is generally 0.2-0.4 (average temperature 350 soil 25 ° C) w / m.k, while the thermal conductivity of the refractory brick is 1.0 (average

The temperature is 350+25°C) w/m.k or more, from which it can be concluded that the insulation performance of the insulation brick is much better than that of the refractory brick.

2. Refractoriness

The refractoriness of insulating bricks is generally below 1400 degrees, while the refractory bricks have a refractoriness of more than 1400 degrees.

3. Density

Insulation bricks are generally lightweight insulation materials, generally having a density of 0.8-1.0 g/cm3 and refractory bricks having a density of 2.0 g/cm3 or more.

In general, refractory bricks have high mechanical strength, long service life, good chemical stability, no chemical reaction with materials and high temperature resistance, and the highest heat resistant temperature can reach 1900. It is especially suitable for high and low temperature shifting furnaces, reforming furnaces, hydroconverters, desulfurization tanks and methanation furnaces in fertilizer plants. It acts to disperse gas and liquid, and to support, cover and protect the catalyst. It can also be used in hot air furnaces and heating converters in the steel industry.

The refractory brick has the advantages of high density, high strength, good wear resistance, good corrosion resistance, small thermal expansion coefficient, high grinding efficiency, low noise, long service life and no contamination of materials. It is a high-quality grinding medium suitable for various grinding machines.

 

Refractory bricks are very different from insulating bricks, and their environment, scope and function are different. Different locations will use different

The materials, when purchasing materials, we have to decide which refractory material is suitable for our own use according to our actual situation.