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Anti-seepage castable is usually a common refractory castable used for the anti-seepage layer of kilns. It can effectively prevent the penetration and erosion of kiln media to kilns. It is currently widely used in the anti-seepage layer of furnace linings such as power stations, boilers, casting, heating, soaking, heat treatment, and induction furnaces. It is generally used for the next anti-seepage layer of the refractory layer to improve the anti-seepage ability of the kiln. So which anti-seepage castable is better and how much does it cost? According to the different alumina content, anti-seepage castables are currently mainly divided into 40% and 45% content. According to the other use temperatures, the refractory temperature of lightweight thermal insulation castables with an aluminum content of 40% is generally in different types of anti-seepage castables. The specific choice must be selected according to the actual use location and temperature. Under working conditions, it has the characteristics of high-temperature resistance, small expansion coefficient, no cracking, pressure resistance, and strong bending resistance. At the same time, it can resist the penetration of cryolite and aluminum melt, and resist chemical erosion. At the same time, it is also convenient for construction during construction, saving a lot of...
When refractory bricks are subjected to high temperatures, within a reasonable temperature range, no obvious chemical reaction will occur, because they have excellent high-temperature resistance and chemical corrosion resistance. However, when the temperature continues to rise, the refractory bricks will change thermal expansion, thermal shock resistance, compressive strength, flexural strength, and bulk density. Generally, when refractory bricks encounter high temperatures, their chemical reactions and properties mainly depend on their chemical composition and mineral composition. Refractory bricks will undergo thermal expansion and contraction when they encounter high temperatures. At a reasonable temperature for refractory bricks, they can resist such thermal expansion and contraction. However, as the temperature rises and reaches the limit temperature of refractory bricks, refractory bricks may suffer stress due to rapid thermal expansion and contraction, resulting in cracking and damage of refractory bricks. Some refractory bricks will react with oxygen at high temperatures to form oxides. For example, chromium-aluminum refractory bricks may undergo oxidation reactions with oxygen at high temperatures to generate oxides such as Cr2O3 and Al2O3. In addition, the bulk density, apparent porosity, load softening temperature, thermal shock resistance, compressive strength, and flexural strength of refractory bricks will change under high temperatures, especially the load softening...
Refractory castable is a material used for high-temperature industrial kiln masonry. It is in powder form under normal conditions. When used, it must be stirred with pure water until it becomes dense for pouring. It can resist high-temperature erosion. There are hundreds of common refractory castables, such as high-aluminum castables, non-stick aluminum castables, corundum castables, silicon carbide castables, etc. Different refractory castables have different components, and there are also differences in physical and chemical indicators. Therefore, when choosing, it is necessary to choose according to the actual environmental characteristics. Refractory castables have the characteristics of high-temperature resistance, thermal shock resistance, creep resistance, etc., and can usually withstand high temperatures above 1450℃. Some refractory castables with specific proportions, can not only withstand high temperatures but also have wear resistance and very good wear resistance, such as high-strength wear-resistant refractory castables. To resist the erosion of the furnace wall by acidic and alkaline media, refractory castables need to be alkali-resistant and acid-resistant, such as acid-resistant castables and alkali-resistant castables. Some highly active media, such as molten aluminum, can corrode the furnace wall, so specific refractory castables are needed, such as non-stick aluminum castables. Not only that, but there are also magnesium castables...
Alumina hollow ball brick is a commonly used thermal insulation refractory material. It has low density, light texture, good thermal insulation, and thermal stability, and can effectively resist high temperature, corrosion, and thermal shock. We often see words like t38 on the purchase order of alumina hollow ball bricks during normal procurement. What does the code t38 of alumina hollow ball brick mean? T38 in alumina hollow ball brick represents the brick number of the brick body and also represents the size of the refractory brick. Its size is 230*114*65/55. The size of refractory bricks varies according to the brick number. Therefore, when purchasing, the brick number is generally used instead of the specific size. You can learn about the specific size of refractory bricks in the article “List of Refractory Brick Size Specifications”, which contains all the brick numbers and sizes of refractory bricks. Alumina hollow ball bricks are currently widely used in high-temperature insulation layers and flues. They not only have the advantages of good fire resistance and strong wear resistance but also can effectively reduce the weight of equipment and improve the thermal efficiency and service life of equipment. When purchasing alumina hollow ball bricks, we must...
High-alumina bricks are an important refractory material and play an important role in today’s industrial production. They can ensure the normal operation of high-temperature kilns. Their refractory temperature refers to the temperature range in which they can maintain structural integrity and performance stability under high-temperature conditions. So what is the refractory temperature of high-alumina bricks? At present, the refractory temperature of common refractory bricks is generally 1400℃-1750℃. According to the different alumina content inside, their refractory temperature also performs differently. Generally, the higher the alumina content, the higher the refractory temperature. Therefore, in the selection process of refractory bricks, we must first understand the general temperature of the high-temperature kiln masonry part, and then make a reasonable choice. High-alumina bricks have excellent refractory properties and chemical stability, making them an ideal choice for many high-temperature industrial equipment. They are currently widely used in the lining and insulation layer of various high-temperature equipment, such as blast furnaces, steelmaking furnaces, converters, glass kilns, cement kilns, and other equipment. In addition to ensuring the kiln’s overall structural stability, refractory bricks ensure that the kiln is not eroded by high temperature, ensuring the stability of the high-temperature kiln. There are four types of high-alumina...
Silicon carbide castables are a high-performance refractory material composed of silicon carbide particles and a binding phase, with high strength, high-temperature stability, wear resistance, and corrosion resistance advantages. According to different components and uses, silicon carbide castables can be roughly divided into several categories and are widely used in many industries. First, from the classification point of view, silicon carbide castables are mainly divided into aluminum silicon carbide castables and high aluminum-silicon carbide-carbon castables. Aluminum silicon carbide castables are made of high-alumina bauxite, plastic, and silicon carbide as the main materials, and are configured by adding explosion-proof fiber, kyanite, and other additives. They are often used in the lining and bottom of equipment such as steelmaking furnaces and converters. High aluminum-silicon carbide-carbon castables are made of corundum/super high-alumina bauxite clinker, silicon carbide, and carbon as the main raw materials, and are mainly used for the lining after the blast furnace is tapped. In terms of application, silicon carbide castables are widely used in many fields due to their excellent performance. In the steel industry, silicon carbide castables are used for patching and repairing high-temperature equipment such as steelmaking furnaces and ironmaking furnaces to improve the fire resistance and service life...
In today’s industrial production, high-temperature kilns play an important role in coloring and assisting in industrial production. The refractory castables that make up high-temperature kilns are the key to ensuring the normal operation of kilns. They are mainly used for the lining and insulation layer of high-temperature kilns, steelmaking furnaces, ironmaking furnaces, and other equipment. However, due to the harsh working environment and the influence of factors such as high temperature and corrosion, the service life of refractory castables is often limited. To extend the service life of refractory castables, we need to take certain measures to ensure their service life and ensure the stability and long service life of high-temperature kilns during the smelting process. 1. Choose the right refractory castable In high-temperature kilns, since the working environment is often high temperature and high-intensity work when choosing refractory castables, it is necessary to reasonably select refractory castables according to the environment of use and to consider factors such as refractory temperature, whether the medium is corrosive, wear resistance, and creep resistance. According to these factors, choosing refractory castables that can resist these factors is the key to extending the service life. 2. Strictly follow the construction specifications for construction...
The problem of refractory castables falling off has always been a headache for users. The falling off of refractory castables can easily lead to danger during use, and the service life of the refractory castables after falling off will be greatly reduced, and it will also lead to a decrease in the service life of high-temperature industrial kilns. So what are the general reasons for the falling off of refractory castables? 1. Mechanical shock: Under the impact of external machinery, such as collision, vibration, etc., it is easy to cause the surface of refractory castables to fall off, so we must avoid intense mechanical shock during use. 2. Rapid temperature changes: Under rapidly changing temperature conditions, the thermal expansion and contraction of refractory castables will cause stress in the material, thereby causing falling off. Therefore, during use, the phenomenon of rapid cooling and heating of high-temperature kilns should be avoided. 3. The moisture is not fully volatilized: During the maintenance of refractory castables, if the moisture in the refractory castables is not fully volatilized, it is easy to cause expansion and castable shedding during work in a high-temperature environment. 4. Quality problems of refractory castables: If there are problems with...
Corundum castable is a high-performance refractory castable composed of alumina and silicon oxide, with excellent refractory and corrosion resistance. Due to the characteristics of corundum, it is widely used in key parts of high-temperature kilns such as glass kilns and high-temperature reactors, providing reliable protection and support for the production process of kilns. Corundum castable plays an important role in the metallurgical industry. In the process of metal smelting such as steelmaking, ironmaking, and copper smelting, traditional refractory bricks are easily damaged due to high temperatures and strong acid and alkali corrosive environments, while corundum castable can effectively extend the service life of furnaces and melting furnaces and improve production efficiency due to its high hardness and corrosion resistance. Corundum castable is also widely used in the glass manufacturing industry. Inside the glass kiln, it is often faced with a high temperature and high pressure environment. At the same time, the glass solution usually has corrosive properties, and traditional refractory castables are difficult to meet the requirements. Corundum castable has excellent refractory properties and thermal shock stability, can effectively resist high-temperature corrosion, protect the internal structure of the glass kiln, and ensure the normal progress of glass production. Corundum castables...
Anti-seepage castables are a kind of refractory material used for the anti-seepage layer of high-temperature industrial kilns. They have low thermal conductivity and strong anti-penetration properties. They can prevent the penetration and erosion of aluminum liquid and liquid. While protecting the insulation layer, they also protect the kiln and increase the service life of the kiln. They are widely used in different parts of the furnace lining such as melting furnaces, heating furnaces, soaking furnaces, and heat treatment furnaces. So what should be paid attention to during the use of anti-seepage castables? 1. Preparation before construction Before construction, the construction site should be cleaned and organized to ensure that the casting surface is clean and flat. At the same time, the construction tools should be cleaned to avoid the mixing of impurities. 2. Material mixing According to the instructions provided by the manufacturer, stir the anti-seepage castable correctly to ensure that the materials are evenly mixed. Strictly control the amount of water added and the quality of water. Clean drinking water should be selected for mixing to avoid construction quality problems due to misproportioning. 3. Temperature and humidity During the construction process, pay attention to the influence of ambient temperature...
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