Refractory bricks are mainly used to protect structures or equipment from thermal radiation and chemical erosion in high-temperature environments, rather than to reduce temperatures. Insulating bricks provide insulation by reflecting and isolating heat, but the actual degree of temperature reduction depends on multiple factors. Including the thermal conductivity of the material, thickness, temperature differences inside and outside the kiln, and the use of other insulation materials.
Insulating Refractory Bricks generally have low thermal conductivity, which means that they can reduce the conduction of heat. However, they cannot reduce the temperature to a level that is completely different from the surrounding environment. Because the temperature reduction mainly depends on the temperature difference and thermal conductivity between the materials. 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, such as refractory fibers, insulation bricks, insulation materials, etc., are needed to better isolate the heat source. These insulation materials usually have lower thermal conductivity and can reduce the temperature more effectively.
The degree of temperature reduction of the kiln insulation depends on many factors, including the type of insulation material, thickness, thermal conductivity of the material, and the temperature difference between the inside and outside of the kiln.
Factors that affect the reduction of the external temperature of the kiln
The following are some factors that affect the degree of reduction of the external temperature of the kiln:
Type of insulation material: Using high-performance insulation materials can reduce the external temperature of the kiln. For example, insulation materials such as insulation bricks, refractory fibers, and insulation castables have low thermal conductivity and can effectively reduce the conduction of heat to the outside of the kiln.
Insulation layer thickness: The thickness of the insulation material affects the degree of temperature reduction. Thicker insulation layers generally provide better insulation.
Temperature difference: The greater the temperature difference between the inside and outside of the kiln, the more effective the insulation will be. If the temperature inside the kiln is very high, using the appropriate insulation material can significantly reduce the outside temperature.
Kiln design: The design of the kiln will also affect the insulation effect. Some kiln designs allow for better insulation performance, such as a double-wall design that allows the air layer between the inner and outer walls to act as a thermal insulation layer.
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 specific temperature reduction will vary depending on the specific parameters of the kiln and the choice of materials. In high-temperature industrial applications, engineers usually perform thermal analysis and insulation design to select the appropriate insulation materials and methods to minimize the external temperature and ensure operability and efficiency.
Rongsheng new refractory insulation material
Inorganic insulation board
It is a new type of refractory insulation material made of pure inorganic materials and processed by a large automatic continuous production line. The use temperature ranges from 900℃-1300℃, and it can be used for various industrial kiln backings, which is a good solution to the problem of kiln insulation. The volume density can be processed and produced from 0.35-0.6g/cm3. Under 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 the large size can be processed 1m*2m.
Insulation brick series products
According to market demand, it solves the wall and bottom insulation of various large kilns, and the use temperature ranges from 600℃-1400℃. It has a wide coverage, good thermal insulation performance, and high strength, meeting the energy-saving and environmental protection requirements of various kilns.
While taking into account the compressive strength of heavy bricks with a bulk density of more than 2.3g/cm3, it also has the thermal conductivity of lightweight bricks with a bulk density of 0.8g/cm3.
The cold surface temperature of large rotary kilns in the cement industry is generally 280-320°C. Because there is no material with high strength and low thermal conductivity, it is impossible to effectively insulate, resulting in huge energy waste. According to calculations, the use of 40-50mm thick ultra-high strength ultra-microporous insulation modules in combination with conventional cement kiln working layer materials can reduce the cold surface temperature of the kiln body by 100°C-130°C.
The specific temperature reduction will depend on several factors, including the characteristics of the material, its application, its thickness, and the conditions of the surrounding environment. In high-temperature applications, engineers and designers usually perform thermal analysis to select appropriate insulation materials and designs to meet specific temperature reduction needs. Rongsheng Refractory Bricks Manufacturer, supply high-quality thermal insulation bricks. Contact Rongsheng for more detailed information.
