The reason why lightweight bricks can be insulated is because the bricks contain a small amount of pores (including open pores and open pores).  Lightweight bricks poor slag resistance, poor thermal vibration resistance, and cannot be in direct contact with glass liquid or flame.

1. Lightweight clay insulation brick

Clay thermal insulation bricks are thermal insulation refractory products with AL2O3 content of 30%-48% made of refractory clay as the main raw material.  Wide range of applications, mostly used in thermal equipment and thermal insulation of industrial furnaces.

2. Lightweight silica brick

Using finely divided silica as raw material, the critical particle size is usually not more than 1mm, and the particles smaller than 0.5mm are not less than 90%. Add flammable substances to the ingredients or use the gas generation method to form a porous structure, which is obtained by firing. Can also be made into non-fired products. It is mainly used for various parts of the kiln that require heat insulation or weight reduction without direct contact with the melt, without the action of corrosive gases, and without sudden temperature changes. It can be used at high temperature and cannot be in contact with basic refractory materials. According to different materials, the operating temperature is 1200-1550℃.

Lightweight silica brick is a very special material, mainly used in glass industry and steel industry. mainly the insulation of the kiln vault, thereby reducing heat loss and increasing the efficiency of the melting process. In the steel industry, lightweight silica bricks are used for the lightweight of hot blast stove walls and domes.

1. Lightweight silica bricks are used in the glass industry - thermal insulation of furnace vaults

During the glass melting process, very high temperatures are reached in the raised lower part of the dome. Depending on the type of glass, the temperature is around 1600°C. Lightweight layers are usually designed as two or more layers.

Lightweight silica bricks are primarily exposed to these temperature loads. It is expected that the single layers of the vault (structural and lightweight layers) have the same or similar expansion properties. Silica bricks with a bulk density of 1250kg·m-3 or 1000kg·m-3 can meet the requirements of the dense layer. The next layer uses silica bricks with a bulk density of 800kg·m-3 or 600kg·m-3.

2. Lightweight silica bricks are used in the steel industry - hot blast stove

The hot blast stove is often used for hot blast (called blast furnace blast), which is connected with the blast furnace exhauster. 1 range.

This entails calculating a comparison between hot blast stoves (different component sizes and locations of use) and glass kiln vaults at different levels and loads, with an emphasis on thermomechanical performance. For lightweight layers, bulk densities of 1250 kg·m-3 or 1050 kg·m-3 are used (mainly due to their higher strength).

3. High-alumina polylight brick