Web Menu

Product Search

Language

Share

News

Home / News

  • What factors are related to the thermal insulation performance of Insulating Refractory Bricks?

    Insulating Refractory Bricks play an important role in high-temperature industrial applications, especially in furnaces and heat treatment equipment. The main function of these bricks is to provide good thermal insulation to reduce heat loss and improve energy efficiency. However, the thermal insulation performance of insulating refractory bricks is not static, but is affected by many factors. 1. Material compositionThe thermal insulation performance of insulating refractory bricks is closely related to its material composition. Common insulating materials are as follows.Lightweight refractory materials: Use lightweight refractory materials such as expanded clay or foam ceramics, which have low thermal conductivity, thereby effectively reducing heat conduction.Fiber materials: Adding fiber materials (such as ceramic fibers or aluminum silicate fibers) to insulating refractory bricks can further improve their thermal insulation performance and reduce the overall density.Pore structure: The pore structure in the brick body will also affect its thermal insulation performance. The presence of pores can reduce the conduction of heat and form an insulation layer. 2. Brick DensityThe density of the brick is an important factor affecting the thermal insulation performance. Generally speaking, the lower the density, the lower the thermal conductivity, which enhances the thermal insulation effect. This is because low-density bricks contain more pores, which can effectively prevent the conduction of heat. However, too low a density may affect the strength of the brick, so it is necessary to find a balance between thermal insulation and mechanical properties when designing. 3. Temperature RangeThe thermal insulation performance of insulating refractory bricks will vary at different temperatures. Generally speaking, at higher temperatures, the thermal conductivity of the brick will increase and the thermal insulation performance may decrease. Therefore, when designing insulating refractory bricks, it is necessary to consider their performance at actual working temperatures. 4. Brick ThicknessThe thickness of the brick directly affects its thermal insulation capacity. Thicker insulating bricks usually have better thermal insulation performance because heat needs to pass through a thicker material layer to conduct to the other side. However, too thick a brick will increase the weight and construction difficulty, so when choosing the thickness of the brick, it is necessary to comprehensively consider the needs of the actual application. 5. Construction QualityThe construction quality also has a significant impact on the thermal insulation performance of insulating refractory bricks. Improper treatment of gaps and joints between bricks will lead to heat leakage. Therefore, correct construction methods and good sealing are the key to ensure efficient insulation of insulating bricks. 6. Environmental factorsThe external environment will also affect the thermal insulation performance of insulating refractory bricks. For example, factors such as ambient air flow, humidity and air pressure may affect the thermal conductivity of bricks. In some applications, external thermal radiation will also affect the thermal insulation effect of bricks, so the comprehensive impact of the environment should be considered during design. 7. Service lifeWith the extension of service time, the performance of insulating refractory bricks may gradually decline, especially in high temperature and corrosive environments. Aging, thermal fatigue and chemical erosion may cause changes in the brick structure, thereby affecting the thermal insulation performance. Therefore, regular inspection and replacement of aging insulating bricks are important measures to maintain system performance.

    Read More

  • What factors affect the thermal shock resistance of Indefinite Refractory Castables?

    Indefinite Refractory Castables is a refractory material commonly used in high-temperature industries. It has strong plasticity and can be adjusted according to different application environments. This material is mainly used in steel, glass, cement, petrochemical and other fields, and plays a protective lining role in high-temperature equipment. Thermal shock resistance is one of the important properties of this material, which determines whether it can maintain structural stability under extreme temperature fluctuations. The following will introduce in detail the main factors affecting the thermal shock resistance of Indefinite Refractory Castables. 1. Composition of materialsThe thermal shock resistance of Indefinite Refractory Castables depends largely on the composition of its materials. Common components include refractory aggregates, binders and additives.Refractory aggregates: Materials such as high-alumina bauxite and magnesia can enhance the high-temperature strength of the material. The size distribution and shape of the aggregate particles and the thermal expansion coefficient of the material itself will affect the thermal shock resistance. Generally speaking, fine-grained aggregates are more likely to form a dense structure, thereby improving thermal shock resistance.Binder: High alumina cement or polymer is a common binder. Binder plays a role of bonding and structural support in refractory materials, but different types of binders have different effects on thermal shock resistance. Better binders can effectively resist thermal expansion stress when the temperature changes, thereby preventing the formation of cracks.Additives: By adding trace elements such as silica powder and alumina, the density and stability of the material can be enhanced. These additives can help reduce the thermal stress inside the material and reduce the risk of material cracking when the temperature changes. 2. Thermal Expansion CoefficientThe thermal expansion coefficient of the material directly determines the magnitude of its dimensional change under temperature changes. If the thermal expansion coefficient of the material is too large, it is easy to crack due to volume expansion or contraction when the temperature changes sharply.The thermal shock resistance of Indefinite Refractory Castables needs to consider the matching of thermal expansion coefficients between materials. By rationally selecting different refractory material components and optimizing the thermal expansion coefficients of each component, the stress between different materials can be effectively reduced, thereby improving the overall thermal shock resistance. 3. Density of materialsThe density of Indefinite Refractory Castables is another important factor that directly affects its thermal shock resistance. High-density materials can reduce the presence of pores, making the material more resistant to cracking under high temperature and rapid cooling and heating environments.Low porosity: Pores are weak points in the material and are prone to become stress concentration points. When the temperature changes rapidly, the stress around the pores is large, which may cause cracks. Therefore, controlling the density of the material can significantly improve the thermal shock resistance by reducing the presence of pores and cracks.Structural density: During the construction process, appropriate vibration treatment and molding technology can make the structure of the material denser, avoid the presence of voids inside, and thus improve the thermal shock resistance. 4. Number of thermal shock cyclesThe material will undergo multiple thermal shock cycles during use, that is, the temperature continues to drop from high temperature to low temperature, and then rise from low temperature to high temperature. The number and amplitude of thermal shock cycles have an important impact on thermal shock resistance.Low number of thermal shocks: Under a certain number of thermal shocks, the material may not show obvious cracks. However, as the number of thermal shocks increases, the microcracks in the material will gradually expand, eventually leading to material failure. Therefore, selecting materials that can withstand high temperatures and multiple thermal shock cycles is an important means to improve thermal shock resistance.Thermal shock temperature difference: If the temperature change is too large, the thermal stress inside the material will increase sharply, especially when the surface and internal temperatures are uneven, the thermal stress will be more obvious, leading to cracks. Therefore, Indefinite Refractory Castables need to have good thermal conductivity to reduce stress concentration caused by temperature differences. 5. Bonding strengthThe thermal shock resistance of a material is closely related to the bonding strength of its internal structure. The higher the bonding strength, the less likely the material will crack when dealing with external thermal stress.Material strength and toughness: Refractory materials need to have certain strength and toughness, especially in high temperature environments. If the strength of the material is insufficient, the thermal stress is likely to exceed its tolerance range, leading to material damage. Materials with good toughness can absorb part of the thermal stress and prevent crack expansion.Interface bonding: Indefinite Refractory Castables are composed of a variety of materials, so the interface bonding strength between different materials also affects the overall thermal shock resistance. If the bonding strength at the interface is insufficient, the material may easily delaminate or fall off when the temperature changes drastically.

    Read More

  • What factors affect the thermal stability of Heavy High Aluminum Brick?

    Heavy High Aluminum Brick is a refractory material with alumina as the main component. It is widely used in high-temperature industries such as metallurgy, chemical industry, and glass. Its thermal stability directly affects its service life and ability to adapt to harsh environments. Thermal stability refers to the ability of a material to maintain its physical, chemical, and mechanical properties at high temperatures, especially whether it can avoid cracking, deformation, or damage when the temperature changes sharply. 1. Alumina contentThe main component of Heavy High Aluminum Brick is alumina (Al₂O₃). The higher its content, the better the high temperature resistance and thermal stability of the brick. The high melting point of alumina (over 2000°C) enables high-alumina bricks to remain stable in extremely high temperature environments. The low thermal expansion coefficient of alumina makes its volume change less at high temperatures, reducing the thermal stress caused by temperature changes. If the alumina content is low, the refractoriness and thermal shock resistance of the brick will be reduced accordingly. Therefore, ensuring a high alumina content is the key to improving the thermal stability of high-alumina bricks. 2. Crystal structureThe microscopic crystal structure of Heavy High Aluminum Brick plays a vital role in its thermal stability. Alumina and other minerals form a dense crystal structure during high-temperature sintering, which can disperse the stress caused by temperature changes and reduce the risk of cracks inside the brick. In addition, the dense crystal structure also reduces the porosity of the material, thereby improving its resistance to thermal shock. If the crystal structure in the brick is uneven or the porosity is high, the material is prone to local stress concentration at high temperatures, resulting in cracking or peeling, affecting its thermal stability. 3. Manufacturing processThe manufacturing process of Heavy High Aluminum Brick has a direct impact on its thermal stability. The molding process of the brick body requires high-pressure pressing to ensure the density of the material. The higher the pressing density, the better the thermal stability of the brick body at high temperature, because its internal pores are less and the thermal stress distribution is more uniform. The firing temperature is also very critical. Generally speaking, the firing temperature of high-aluminum bricks is between 1400℃ and 1600℃. If the firing temperature is too low, the material is not dense enough, which can easily lead to uneven thermal expansion coefficient; if the firing temperature is too high, it may destroy the balance between alumina and other components, thus affecting thermal stability. 4. Thermal expansion coefficientThe thermal expansion coefficient of a material is an important parameter that affects its thermal stability. The smaller the thermal expansion coefficient, the smaller the size change of the brick during temperature changes, and the thermal stress is also reduced accordingly. Heavy High Aluminum Brick has a higher alumina content, which gives it a lower thermal expansion coefficient and makes it have better dimensional stability under high temperature conditions. Therefore, the brick can maintain structural integrity in a high temperature fluctuation environment and will not crack due to expansion or contraction. If the thermal expansion coefficient of the material is large, the stress generated during temperature fluctuations will be greater, resulting in a decrease in thermal stability.

    Read More

  • What factors affect the high thermal conductivity of Silicon Carbide Products

    Silicon Carbide, SiC is widely used in various industrial fields due to its good physical and chemical properties, especially its high thermal conductivity makes it perform well in occasions where heat dissipation is required. Siliconized carbon materials have the advantages of high thermal conductivity, high temperature resistance, wear resistance and corrosion resistance, and are widely used in electronic devices, heat exchangers, semiconductor manufacturing and other fields. However, the thermal conductivity of siliconized carbon is not fixed, and it is affected by many factors. The following will analyze the factors that affect the high thermal conductivity of siliconized carbon products from the perspectives of crystal structure, material purity, temperature, doping elements and processing technology. 1. Influence of crystal structureThe high thermal conductivity of siliconized carbon is related to its unique crystal structure. There are mainly two crystal structures of siliconized carbon: α-type (hexagonal structure) and β-type (cubic structure). At room temperature, the thermal conductivity of β-type siliconized carbon is slightly higher than that of α-type siliconized carbon. The atomic arrangement of β-type siliconized carbon is more compact, the lattice vibration is more orderly, and the thermal resistance is reduced. Therefore, choosing a suitable crystal structure can improve the thermal conductivity of the material.However, in high temperature environments, α-type silicified carbon gradually shows better thermal stability. Although its thermal conductivity is slightly lower at room temperature, it can maintain good thermal conductivity at high temperatures. This means that in specific application environments, it is crucial to choose the right crystal structure. 2. Influence of material purityThe thermal conductivity of silicified carbon materials is highly dependent on their purity. There are fewer impurities in silicified carbon crystals with higher purity, and the scattering of lattice vibrations during heat transfer is reduced, so the thermal conductivity is improved. On the contrary, impurities in the material will form lattice defects, hinder the transfer of heat flow, and reduce thermal conductivity efficiency. Therefore, maintaining the high purity of silicified carbon materials during production is crucial to ensure other high thermal conductivity.Some residual impurities, such as metal oxides or other amorphous substances, will form thermal barriers at the grain boundaries of silicified carbon crystals, significantly reducing the thermal conductivity of the material. These impurities will cause the thermal resistance at the grain boundaries to increase, especially at higher temperatures. Therefore, strictly controlling the purity of raw materials and production processes is one of the key steps to improve the thermal conductivity of silicified carbon. 3. Effect of temperature on thermal conductivityTemperature is one of the important factors affecting the thermal conductivity of carbon silicide. As the temperature increases, the lattice vibration in the material will be enhanced, resulting in increased phonon scattering, which will affect the conduction of heat. In low temperature environments, the thermal conductivity of carbon silicide materials is relatively high, but as the temperature increases, the thermal conductivity will gradually decrease.The thermal conductivity of carbon silicide varies in different temperature ranges. Generally speaking, the thermal conductivity of carbon silicide is more prominent at low temperatures, but when the temperature exceeds 1000°C, its thermal conductivity will gradually weaken. Despite this, the thermal conductivity of carbon silicide in high temperature environments is still better than most other ceramic materials. 4. Effect of doping elementsIn order to optimize the thermal conductivity of carbon silicide materials, some doping elements are usually introduced in the industry, which can change the crystal structure and electrical properties of the material, thereby affecting the thermal conductivity. For example, doping with elements such as nitrogen or aluminum can change the thermal conductivity of carbon silicide.However, doping may also cause negative effects. If the doping concentration is too high, the defects in the crystal structure increase, and the doped atoms interact with the lattice atoms, resulting in enhanced lattice vibration, increased thermal resistance, and ultimately reduced thermal conductivity of the material. Therefore, the type and concentration of the doping element need to be precisely controlled to minimize the negative impact on thermal conductivity while enhancing other properties (such as electrical conductivity). 5. Influence of processing technologyThe manufacturing process of siliconized carbon materials has a direct impact on their thermal conductivity. Different production methods such as sintering process, hot pressing molding, and vapor deposition will affect the grain size, density, and porosity of the material, all of which will affect thermal conductivity.For example, siliconized carbon materials produced by hot pressing sintering usually have higher density and fewer pores, shorter heat conduction paths, and therefore better thermal conductivity. Siliconized carbon materials prepared using conventional sintering methods may have more pores and microscopic defects, resulting in increased thermal resistance and reduced thermal conductivity.

    Read More

  • What is the impact of the design structure of the Burner Block on its durability?

    In the core equipment of the chemical industry, the Burner Block is a key component for flame stabilization and transmission. Its design structure is related to the combustion efficiency of the flame and directly affects its durability during use. A well-designed Burner Block can resist the erosion of high temperature, high pressure and corrosive media, thereby extending the service life of the equipment and ensuring the stable operation of the production line. 1. The flame guidance and distribution design of the Burner Block is crucial to its durability. Reasonable flame guidance can ensure that the flame is evenly distributed in the combustion chamber and avoid material ablation caused by local overheating. At the same time, by optimizing the design of the airflow channel, the airflow resistance can be reduced, the combustion efficiency can be improved, and the heat load borne by the Burner Block can be further reduced. This design extends the service life of the Burner Block and improves the stability and safety of the entire combustion system. 2. The design of heat dissipation and cooling structure is also an important factor affecting the durability of Burner Block. In high temperature environment, Burner Block needs to have good heat dissipation performance to prevent material performance degradation or damage caused by excessive temperature. In the design, measures such as increasing the heat dissipation area, setting cooling channels or using materials with good thermal conductivity are usually adopted to improve the heat dissipation efficiency of Burner Block. These designs help to reduce the working temperature of Burner Block and effectively extend its service life. 3. The design of sealing and protective structure should not be ignored. In chemical production, many media are highly corrosive. If the sealing performance of Burner Block is not good, it is easy to cause medium leakage, which will cause corrosion and damage to Burner Block. Therefore, in the design, attention must be paid to the design of the sealing structure, and high-quality sealing materials and advanced sealing technology must be used to ensure the reliable sealing performance of Burner Block. At the same time, corrosion-resistant coatings can be applied to the surface of Burner Block or other protective measures can be adopted to improve its corrosion resistance. 4. The design of stress distribution and structural optimization is also the key to improving the durability of Burner Block. Under high temperature and high pressure environment, Burner Block will be subjected to complex stress. If the stress distribution is uneven or the structural design is unreasonable, it is easy to cause material fatigue, cracking and other problems. Therefore, the characteristics of stress distribution need to be fully considered in the design. By optimizing the structural layout, adopting reasonable material thickness and shape and other measures, the stress concentration phenomenon can be reduced and the bearing capacity of Burner Block can be improved. The design structure of Burner Block has a far-reaching impact on its durability. By optimizing the design of flame guidance and distribution, heat dissipation and cooling structure, sealing and protection structure, stress distribution and structural optimization, etc., the durability of Burner Block can be significantly improved, providing a strong guarantee for the stable operation of chemical production.

    Read More

  • Why Indefinite Refractory Castables have good thermal shock stability

    In the field of high-temperature industry, rapid changes in temperature in the furnace are the norm. This frequent thermal shock poses a severe challenge to the furnace lining materials. Indefinite Refractory Castables stands out among many refractory materials due to its good thermal shock stability and has become an ideal choice to meet this challenge. So why does IRC have such good thermal shock stability? The outstanding performance of IRC's thermal shock stability is due to the scientific design of its material formula. During the research and development process, a variety of high-temperature resistant and low thermal expansion coefficient raw materials were selected for proportioning to ensure that IRC can maintain a stable volume and shape at high temperatures. In addition, by adding appropriate amounts of additives such as micropowders and fibers, the microstructure of IRC can be effectively improved and its thermal shock resistance can be improved. These additives can absorb and disperse stress during thermal shock and prevent the material from cracking due to stress concentration. Particle grading is one of the key factors affecting the thermal shock stability of IRC. Strictly control the particle size and distribution of raw materials to ensure that a reasonable pore structure and a dense skeleton structure are formed inside IRC. This structure can effectively disperse and transfer stress during thermal shock, reduce damage caused by stress concentration, and the dense skeleton structure can also improve the strength and toughness of IRC, further enhancing its thermal shock resistance. In addition to material formulation and particle grading, advanced production technology is also an important guarantee for the good thermal shock stability of IRC. During the production process, high-pressure molding, high-temperature sintering and other processes are used to form a close bond between the internal particles of IRC, thereby improving its overall strength and density. At the same time, by optimizing the sintering curve and atmosphere control, the microstructure of IRC can be further improved and its thermal shock resistance can be improved. Although IRC itself has good thermal shock stability, reasonable use and maintenance are also the key to maintaining its performance. During use, the rapid rise and fall and excessive fluctuation of the furnace temperature should be avoided to reduce thermal shock damage to the IRC. Regular inspection and maintenance of the furnace lining, timely detection and treatment of potential cracks and spalling problems are also important measures to extend the service life of IRC and maintain its thermal shock stability. Indefinite Refractory Castables havegood thermal shock stability due to the combined effect of many factors such as the scientific design of its material formula, fine particle grading, advanced production technology, and reasonable use and maintenance. These advantages enable IRC to operate stably and reliably in the high-temperature industrial field, providing a strong guarantee for the safe production and efficient operation of various furnaces.

    Read More

  • Why is Low-cement Prefab environmentally friendly?

    1. The core of Low-cement Prefab is its material composition and production process. Compared with traditional construction methods, this prefabricated building greatly reduces the use of cement during the manufacturing process. Cement production is one of the important sources of greenhouse gas emissions, especially carbon dioxide emissions. By reducing the amount of cement used, Low-cement Prefab reduces the carbon footprint of building materials and makes a positive contribution to addressing climate change. 2. In addition to reducing the use of cement, Low-cement Prefab also uses a variety of environmentally friendly materials and technologies. It uses recycled materials, industrial waste or natural minerals as alternative raw materials. These materials are widely available and can reduce the mining of new resources and reduce damage to the natural environment. At the same time, the production process of prefabricated buildings is completed in the factory, which reduces the noise, dust and waste emissions of on-site construction, and further improves environmental protection performance. 3. From the perspective of the entire life cycle of the building, Low-cement Prefab also performs well. Due to its structural design and optimized material selection, this type of building has better performance in thermal insulation, ventilation and lighting, and can reduce energy consumption and carbon emissions during the operation of the building. In addition, prefabricated buildings also have high durability and maintainability, which can extend the service life of buildings and reduce waste and carbon emissions caused by frequent demolition and construction. 4. In the process of promoting the development of Low-cement Prefab, policy support and market guidance have played an important role. Governments of various countries have introduced relevant policies to encourage the development of low-carbon and environmentally friendly buildings, providing a broad development space for innovative building methods such as Low-cement Prefab. With the improvement of consumers' environmental awareness, more and more companies and individuals have begun to pay attention to and choose low-carbon and environmentally friendly building products, providing strong support for the market promotion of innovative building methods such as Low-cement Prefab. Low-cement Prefab is a low-carbon and environmentally friendly building method with significant advantages in reducing greenhouse gas emissions, reducing building carbon footprint, and improving building performance. With the continuous improvement of global environmental awareness and the continuous advancement of technology, Low-cement Prefab is expected to play a more important role in the future construction field and contribute to the construction of a green, low-carbon and sustainable home on earth.

    Read More

  • Introduction to the specific production process of Heavy Clay Brick

    Heavy Clay Brick is a classic among building materials. It is durable and has high compressive strength, so it is widely used in the construction field. The following will introduce the specific production process of Heavy Clay Brick in detail, from raw material preparation to finished product production, showing the unique charm of this traditional process combined with modern technology. 1. The main raw material of Heavy Clay Brick is clay, which must have high plasticity, adhesion and fire resistance. In the raw material preparation stage, the clay must first be mined and screened to remove impurities and stones to ensure the purity of the raw materials. The screened clay is then crushed and mixed to form a uniform clay material. 2. Molding is a key link in the production of Heavy Clay Brick. Traditionally, clay materials are extruded into bricks by hand or mechanical means. With the development of science and technology, modern brick factories generally use molding equipment with a high degree of automation, such as brick presses and extruders. These devices can accurately control the pressure and flow of clay materials to ensure that the size and shape of the bricks meet the standards. During the molding process, the clay materials are squeezed into bricks with a certain strength and density, laying the foundation for subsequent drying and firing. 3. The formed bricks contain high moisture and need to be dried to reduce their moisture content. The drying process is usually carried out in a special drying room, using hot air or natural wind to heat and ventilate the bricks. The drying temperature and time need to be adjusted according to the properties of the clay materials and the size of the bricks to ensure that the bricks will not crack or deform during the drying process. After drying, the moisture content of the bricks will be reduced to a level suitable for firing. 4. Firing is the last process in the production of Heavy Clay Brick and is also a key link in determining the quality of bricks. The firing process is carried out in a kiln, and the clay materials undergo physical and chemical changes through high-temperature calcination to form hard bricks. The firing temperature is usually between 900-1200℃, and the specific temperature needs to be adjusted according to the type of clay materials and the purpose of the bricks. During the firing process, the moisture and organic matter in the clay material are discharged, and the clay particles are sintered to form a dense brick structure. The fired bricks have high strength, high durability and good thermal insulation performance. 5. After firing, the Heavy Clay Brick needs to undergo a strict inspection procedure to ensure that its quality meets the standards. The inspection content includes indicators such as the size, strength, and water absorption of the bricks. Qualified bricks will be packaged and stored and supplied to the construction market. The production process of Heavy Clay Brick is a complex and delicate process that requires strict control of the parameters and conditions of each link. Through the combination of traditional craftsmanship and modern technology, Heavy Clay Brick retains its sturdy and durable characteristics, and also achieves a dual improvement in production efficiency and product quality.

    Read More

  • How does temperature affect the production of Indefinite Refractory Castables?

    In the manufacturing and application process of Indefinite Refractory Castables, temperature is an important factor that cannot be ignored. It runs through every link from material preparation, mixing, molding and curing to final use, and has a profound impact on the performance, structure and final quality of the castable. 1. Temperature begins to play its role in the material preparation stage. For refractory aggregates and powders, their moisture content, temperature sensitivity, and changes in physical and chemical properties at different temperatures are directly related to the stability and processability of the castable. Some materials may undergo phase changes or chemical reactions at high temperatures, resulting in decreased performance; while excessive moisture content will affect the mixing uniformity and molding effect of the materials. In the process of material selection and processing, temperature conditions must be strictly controlled to ensure stable and reliable material quality. 2. Temperature is also an important parameter in the mixing and stirring stage. Temperature control during the stirring process not only affects the fluidity and mixing uniformity of the material, but may also have a significant impact on the activation effect of the binder. Some chemical binders will accelerate the reaction at high temperatures, causing the castable to harden prematurely; while too low a temperature may cause insufficient activation of the binder, affecting the strength development of the castable. During the mixing process, it is necessary to reasonably control the mixing temperature and mixing time according to the characteristics and usage requirements of the specific binder to ensure the quality of the castable. 3. The molding and curing stage is one of the links where temperature has significant impact. At this stage, the castable needs to harden and develop strength under certain temperature conditions. The temperature level and change rate directly affect the hardening speed and degree of the castable. Too high a temperature may cause the castable to harden too quickly, resulting in internal stress and cracks; while too low a temperature may cause the castable to harden insufficiently, affecting the final strength. Changes in temperature may also cause evaporation and phase change of water inside the castable, further affecting its performance. Therefore, during the molding and curing process, a reasonable curing system and temperature control plan must be formulated according to the characteristics and usage requirements of the castable to ensure that the castable can be fully hardened and achieve good performance. 4. Even if the castable has been made and put into use, temperature is still a factor that needs to be closely monitored. In a high-temperature working environment, castables need to withstand continuous thermal shock and temperature cycling changes, which places higher demands on its heat resistance, slag resistance and thermal shock stability. During use, it is necessary to regularly check the temperature distribution of the castable and take timely measures to prevent performance degradation or damage caused by overheating or overcooling.

    Read More

  • How is the manufacturing process of Alumina Bubble Brick carried out?

    1. Raw material preparationEverything starts with the careful selection and scientific proportioning of raw materials. Alumina Bubble Brick are the core raw materials. Their quality directly determines the performance of the final product. These tiny balls are made of high-purity alumina powder through a special process, with uniform pore size and good high temperature resistance. In addition to alumina hollow balls, an appropriate amount of alumina powder and other binders need to be added to adjust the density, strength and sintering properties of the material. During the raw material preparation stage, workers will mix them strictly according to the formula ratio to ensure that each batch of raw materials can reach the best state. 2. Molding processMolding is one of the key steps in the manufacture of Alumina Bubble Brick. At this stage, the evenly mixed raw materials are fed into the molding machine and formed into a blank with a certain shape and size through the pressing action of the mold. During the molding process, the size and distribution of the pressure need to be precisely controlled to ensure the density and uniformity of the blank structure. The design of the mold is also crucial, which determines the shape and dimensional accuracy of the final product. After the careful creation of the molding machine, a piece of regular and solid green body is born. 3. Drying treatmentThe green body after molding contains a certain amount of moisture. If this moisture is not removed in time, it will affect the subsequent sintering quality. Drying treatment has become an indispensable link. The green body is sent to the drying kiln and slowly dried under suitable temperature and humidity conditions. In this process, the moisture gradually evaporates and the green body structure gradually stabilizes. The length of the drying time depends on the thickness, humidity and performance of the green body. After sufficient drying treatment, the green body becomes harder and more durable. 4. High temperature sinteringHigh temperature sintering is the most critical link in the manufacturing process of Alumina Bubble Brick. At this stage, the dried green body is sent to a high temperature kiln for sintering. The temperature in the kiln gradually rises to above 1750 degrees Celsius, causing the alumina hollow balls and alumina powder in the green body to undergo chemical reactions and physical changes to form a dense sintered body. At high temperatures, the bonding force between alumina particles is enhanced, the porosity is reduced, and the strength and high temperature resistance of the material are significantly improved. High temperature also promotes the volatilization and removal of impurities in the material, further improving the purity of the product. After several hours of sintering, hard and high temperature resistant Alumina Bubble Bricks are born. 5. Finished product inspection and packagingThe last step is the inspection and packaging of the finished product. Each Alumina Bubble Brick needs to undergo strict quality inspection, including appearance inspection, size measurement, strength testing, etc. Only products that meet the standards can be allowed to be sold. In order to facilitate transportation and use, the finished product must also be properly packaged. The packaging material should have good shockproof and moisture-proof properties to ensure that the product is not damaged during transportation.

    Read More

  • What are the ingredients of Low-cement Prefab?

    In the wave of pursuing green buildings and sustainable development, Low-cement Prefab stands out for its unique environmental protection characteristics and efficient construction methods. This construction method not only reduces resource consumption, but also reduces the impact on the environment. So, Low-cement Prefab What exactly does cement Prefab consist of? The core ingredient of Low-cement Prefab is the low-cement concrete used in its prefabricated components. Compared with traditional concrete, low-cement concrete significantly reduces the amount of cement while maintaining sufficient strength. Cement is the main cementitious material in concrete, but its production consumes a lot of energy and generates carbon emissions. By reducing the amount of cement used, Low-cement Prefab reduces the carbon footprint from the source and achieves the goal of energy conservation and environmental protection. In addition to low cement, Low-cement Prefab's prefabricated components also contain auxiliary materials such as aggregates and additives.Aggregate: Aggregate is the main filler in concrete and usually includes coarse aggregate (such as gravel, pebbles) and fine aggregate (such as sand). In Low-cement Prefab, the selection and proportion of these aggregates are crucial to the strength and durability of the component. Reasonable use of aggregates can also reduce the amount of cement and further reduce carbon emissions.Additives: In order to improve the properties of low-cement concrete, such as increasing strength, improving fluidity, extending setting time, etc., some special chemicals are usually added as additives. These additives include water reducing agents, retarders, air entraining agents, etc., which play a vital role in concrete. It is worth noting that the use of additives should be strictly controlled to ensure that they do not cause negative effects on the environment and human health. In order to further improve the performance of Low-cement Prefab prefabricated components, fibers and reinforcing materials will also be added.Fiber: Such as steel fiber, polypropylene fiber, etc. These fibers can effectively improve the crack resistance and toughness of concrete, making prefabricated components more stable and reliable when withstanding external forces.Reinforcement materials: such as steel bars, steel mesh, etc., which are embedded in concrete to form a reinforced concrete structure to improve the load-bearing capacity and seismic resistance of components. Low-cement Prefab prefab components are mainly composed of low-cement concrete, aggregates, additives and possible fibers and reinforcing materials. These components work together to ensure the strength and durability of the components, and also achieve the goal of energy conservation and environmental protection. By reducing the amount of cement, optimizing the material ratio, and using environmentally friendly additives and fiber materials, Low-cement Prefab provides strong support for the sustainable development of the construction industry.

    Read More

  • What are the ingredients of Mullite Insulating Brick?

    In the world of refractory materials, Mullite Insulating Brick's unique combination of ingredients and excellent performance have gradually become an indispensable part of the high-temperature industry. This brick bears the heavy responsibility of resisting extreme high temperatures, and has also won wide recognition in the industry for its excellent thermal insulation performance and chemical stability. The core components of Mullite Insulating Brick are high-content mullite (3Al2O3·2SiO2) and alumina (Al2O3). Mullite is a mineral phase formed at high temperatures with an extremely high melting point, good thermal stability and chemical inertness. The formation of this mineral phase enables mullite insulation bricks to maintain a stable structure and performance in extremely high temperature environments, and is not prone to phase change or decomposition. Alumina is one of the main components of mullite and also occupies an important proportion in the brick body. Alumina itself has the characteristics of high melting point, high hardness, good wear resistance and chemical stability, which are fully reflected in mullite insulation bricks. The content of alumina may vary in different types of mullite insulation bricks, but it is usually kept at a high level to ensure that the brick has excellent high temperature resistance and chemical stability. In addition to mullite and alumina, Mullite Insulating Brick also contains a certain amount of siliceous materials (such as quartz sand, silica powder, etc.) and other auxiliary components. Siliceous materials help to adjust the thermal expansion coefficient and thermal conductivity of the brick, and can also improve the overall strength and thermal shock resistance of the brick. In order to firmly combine various raw materials to form a dense brick structure, mullite insulation bricks will also add an appropriate amount of binders during the production process. These binders can form a stable binding phase at high temperature to ensure the structural integrity and performance stability of the brick under high temperature environment. Thanks to its unique combination of ingredients and manufacturing process, Mullite Insulating Brick exhibits excellent comprehensive performance. It has the characteristics of good thermal insulation performance, high strength, low thermal conductivity and good chemical stability. These characteristics make mullite insulation bricks widely used in high-temperature kilns such as glass kilns, petrochemical kilns, roller kilns, tunnel kilns, etc. It is also suitable for various industrial furnaces and heat treatment equipment that require high-temperature insulation, providing these equipment with reliable thermal insulation protection and energy-saving effects.

    Read More

NEWs

PRODUCTS