Как выбрать лучший теплоизоляционный кирпич?

Thermal insulation bricks are a type of огнеупорный кирпич with heat-insulating capabilities. Их можно использовать в высокотемпературном промышленном оборудовании для сохранения тепла и уменьшения теплопередачи.. In order to meet the needs of different high-temperature environments, there are many varieties of thermal insulation bricks, and each type of brick has different advantages and characteristics.

Mullite thermal insulation bricks
Mullite thermal insulation bricks

Introduction to five common thermal insulation bricks

Кирпич с высоким содержанием глинозема

High alumina insulation bricks are used for the lining of high-temperature equipment, including ceramic tunnel kilns, доменные печи, coke kilns, и т. д.. They are generally not used in industrial equipment that needs to be in direct contact with flames or resist chemical erosion.

Кирпич с высоким содержанием глинозема

Al2O3, %: ≥48;
Теплопроводность, ж/(mk): 0.2-0.55;
Холодная прочность на раздавливание, МПа: 1.0-4.5;

Clay insulation brick

Clay refractory insulation bricks can be widely used in many industrial high-temperature equipment, including blast furnaces, доменные печи, cement kilns, стекольные печи, и т. д.. Clay insulation bricks can resist the erosion of acidic solutions. But it also cannot be directly exposed to flames.

Al2O3, %: 30-46;
Теплопроводность, ж/(mk): 0.23-0.65;
Холодная прочность на раздавливание, МПа: 0.8-6.0;

Clay insulation brick

Mullite insulation brick

Mullite insulation brick has many pores on the surface, so it has strong insulation ability. Кроме того, JM mullite insulation brick can also resist the erosion of acid and alkali. Поэтому, it can be used for the lining of high-temperature kilns such as glass melting furnace regenerators and ceramic sintering kilns. It is also used to top hot air kilns, и т. д..

Mullite insulation brick

Al2O3, %: 40-77;
Теплопроводность, ж/(mk): 0.18-0.56;
Холодная прочность на раздавливание, МПа: 0.9-3.5;

Silica insulation brick

Silica insulation brick is a kind of acidic insulation brick. It can resist the erosion of acidic chemical gas. There are many pores on the surface of silica brick. These pores reduce the weight of the brick. So silica insulation brick is lighter than other insulation bricks. Silica insulation brick is mainly used for the insulation layer of hot blast furnaces, steel rolling furnace tops, natural gas pipelines, and other blast parts.

SiO2, %: ≥91;
Теплопроводность, ж/(mk): 0.55-0.7;
Холодная прочность на раздавливание, МПа: 2-5;

Silica thermal insulation  brick

Alumina hollow ball brick

Alumina insulation bricks are usually used for lining of high-temperature industrial equipment such as ceramic kilns, cracking furnaces, стекольные печи, и мусоросжигательные заводы. Alumina hollow bricks have excellent thermal insulation properties. The bulk density and thermal conductivity are low. These properties enable alumina hollow bricks to maintain the temperature of industrial equipment.

Alumina hollow ball brick

Al2O3, %: 90-99;
Теплопроводность, ж/(mk): 0.9-1.2;
Холодная прочность на раздавливание, МПа: 6-18;