Main function is used to heat preservation, heat preservation brick and reduce the loss of heat, heat preservation brick generally don't direct contact with the flame, and refractory brick generally direct contact with the flame. Refractory brick is mainly used for the flame burning. Generally fall into two kinds, namely not stereotypes refractories and refractory materials. Not stereotypes refractories: also called castable, is by a variety of aggregate or aggregate of one or more sticky and agent and mixed powder material, must be with one or more of the liquid mixing evenly, with strong liquidity. Stereotypes refractories: general refractory brick, the shape of standard rules, can also according to the need to cut up temporary processing.
Insulation bricks and refractory brick main differences are the following:
1. The thermal insulation performance
The coefficient of thermal conductivity of insulating brick is in commonly 0.2 0.4 (the average temperature of 350 + 25 ℃) w/m.k, and the coefficient of thermal conductivity of refractory brick (average temperature of 350 + 25 ℃) in 1.0 w/m.k above, which can be concluded that thermal insulation brick insulation heat preservation performance is much better than brick.
2. The refractoriness
Thermal insulation brick is in commonly 1400 degrees refractoriness, and refractory brick above 1400 degrees refractoriness.
Density of 3.
Insulating brick are generally light heat preservation material, generally in 0.8 1.0 g/cm3 density and the density of refractory brick basic is above 2.0 g/cm3.
In aggregate, high mechanical strength of refractory brick, use cycle is long, and good chemical stability, does not react with the material and high temperature resistant performance is good, the highest heat temperature can reach 1900 ℃. Especially suitable for the transformation of plant for high and low temperature transformation furnace, furnace, hydrogenation converter, desulphurization trough and methanation in the furnace, the scattered gas and liquid, and support, cover and protect the catalyst. Can also be used in the steel industry transformation stove and heating equipment.
Firebrick has big density, high strength, wear resistance, good corrosion resistance, small thermal expansion coefficient, high grinding efficiency, low noise, long service life, not waste material, etc. Is suitable for all kinds of grinding machines of high quality grinding media.
The difference between the refractory brick and thermal insulation brick is very big, they use environment, scope, function is different. Different position will use different material, when the choose and buy material, we should according to own actual situation, decided to use which kinds of refractory material is suitable for my own use.