How Much Can the Temperature Drop after Refractory Bricks Are Insulated?

Refractory bricks are primarily used to protect structures or equipment from thermal radiation and chemical attack in high-temperature environments, rather than to reduce temperatures. Insulation bricks provide insulation by reflecting and isolating heat, but the actual degree of temperature reduction depends on several factors, including the material’s thermal conductivity properties, thickness, temperature differences inside and outside the kiln, and the use of other insulating materials.

Refractory bricks generally have low thermal conductivity properties, meaning they reduce the conduction of heat. However, they cannot reduce the temperature to a completely different level than the surrounding environment, because the temperature reduction mainly depends on the temperature difference between the materials and the thermal conductivity. The main function of refractory bricks is to maintain the stability of the internal structure and protect the surrounding environment from high temperatures.

To reduce the temperature, more insulation layers or materials need to be used, such as refractory fibers, insulation bricks, insulation materials, etc., to better isolate the heat source. These insulation materials typically have lower thermal conductivity properties and can reduce temperatures more effectively.

The degree to which kiln insulation reduces temperature depends on several factors, including the type of insulation, its thickness, the material’s thermal conductivity properties, and the temperature difference between the interior and exterior of the kiln.

The following are some factors that affect the extent to which the temperature outside the kiln decreases:

Insulation materials: Using high-performance insulation materials can reduce the temperature outside the kiln. For example, insulation materials such as insulation bricks, refractory fibers, and insulation castables have low thermal conductivity, which can effectively reduce the conduction of heat to the outside of the kiln.

1. Thickness of insulation layer: The thickness of the insulation material will affect the degree of temperature reduction. Thicker insulation generally provides better insulation.

2. Temperature difference: The greater the temperature difference between the inside and outside of the kiln, the more significant the heat insulation effect will be. If the internal temperature of the kiln is very high, using appropriate insulation materials can significantly reduce the external temperature.

3. Kiln design: The design of the kiln also affects the insulation effect. Some kiln designs allow for better insulation, such as a double-wall design so that the air layer between the inner and outer walls acts as an insulation layer.

4. Material thermal conductivity: Different materials have different thermal conductivity properties. The choice of insulation material should be determined based on the requirements of the specific application.

The exact degree of temperature reduction will vary depending on the specific parameters of the kiln and the choice of materials. In high-temperature industrial applications, engineers often perform thermal analysis and insulation design to select appropriate insulation materials and methods to minimize external temperatures and ensure operability and efficiency.

Inorganic insulation board
It is a new type of refractory insulation material made of pure inorganic materials and processed on a large-scale automatic continuous production line. The operating temperature ranges from 900°C to 1300°C and can be used for various industrial kiln backings, which can effectively solve the problem of kiln thermal insulation. It can be processed and produced with bulk density from 0.35-0.6g/cm³. Under the condition of 350℃, the thermal conductivity is controlled within the range of 0.11-0.13W/(m· K), the strength can be controlled within the range of 1-2Mpa, and large sizes can be processed into 1 meter * 2 meters.

Insulation brick series products
According to market demand, we can solve the problem of wall and bottom thermal insulation of various large-scale kilns. The operating temperature ranges from 600℃ to 1400℃. It has wide coverage, good thermal insulation performance, and high strength, and meets the energy-saving and environmentally friendly requirements of various kilns.

Ultra-high strength ultra-microporous thermal insulation module
It not only takes into account the compressive strength of heavy bricks with a body density above 2.3g/cm³ but also has the thermal conductivity of lightweight bricks with a body density of 0.8g/cm³.

The cold surface temperature of large-scale rotary kilns in the cement industry is generally 280-320°C. Because there are no materials with high strength and low thermal conductivity, effective insulation cannot be achieved, resulting in a huge waste of energy.

According to calculations, the use of 40-50mm thick ultra-high-strength ultra-microporous thermal insulation modules in conjunction with conventional cement kiln working layer materials can reduce the cold surface temperature of the kiln body by 100°C-130°C.

The exact degree of temperature reduction will depend on several factors, including the characteristics of the material, its use, its thickness, and the conditions of the surrounding environment. In high-temperature applications, engineers and designers often perform thermal analysis to select appropriate insulation materials and designs to meet specific temperature reduction needs.