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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...
Refractory plastic and refractory castable are both important materials for high-temperature industrial kiln masonry and are mainly used for high-temperature industrial kiln masonry. Although both can be used in industrial kilns, there are great differences between the two in essence. So what is the difference between refractory plastic and refractory castable? 1. Different material forms Refractory plastic usually exists in the form of solids, powders, or granules. It needs to be mixed with water under certain conditions to form a plastic paste before construction; while refractory castable exists in the form of dry powder or granules. It needs to be mixed with water before construction to form a slurry, and then poured or sprayed. 2. Different material composition Refractory plastic is mainly composed of high-temperature anti-burning materials, fillers, and adhesives. It is a plastic material designed for high-temperature environments. It is usually used for insulation, thermal protection, and coating of thermal equipment such as furnaces, kilns, chimneys, etc. Refractory castables are usually mixed with refractory cement, refractory aggregates, and additives. They are a type of casting material used for high-temperature masonry, suitable for refractory masonry, filling, and repair in high-temperature environments. 3. Different uses Refractory plastics are mainly used for...
Grate bricks can improve the heat exchange efficiency and heat storage capacity of the heat storage chamber. To further improve the heat storage capacity and heat transfer efficiency of the heat storage body, the arrangement of grate bricks is very important. Usually, the grate bricks in the heat storage chamber have a specific order of arrangement. This aims to ensure uniform heat transfer and more effective heat storage. The grate stripe arrangement is a common arrangement of grate bricks in heat storage chambers. Its arrangement is mainly staggered in the vertical and horizontal directions to form a lattice structure like a chessboard. In this arrangement, the surface area can be increased to improve heat transfer efficiency and reduce heat waste. Another common arrangement of grate bricks in heat storage chambers is the stacking arrangement. It arranges that each layer of grate bricks will be slightly offset from the previous layer, forming a staggered arrangement effect. This arrangement can increase the heat storage capacity and improve the heat transfer efficiency. The arrangement of grate bricks in the heat storage chamber affects the heat storage capacity and heat transfer efficiency of the entire heat storage chamber. The specific arrangement method will vary...
In modern industrial production, high-temperature industrial kilns are indispensable. They play a key role in smelting and production. The construction of high-temperature kilns is inseparable from refractory castables. Its main function is to protect the inner wall of high-temperature equipment from high temperature, corrosion, and wear. It also has good thermal conductivity and mechanical strength. Today, the editor will take you to understand the use of refractory castables in high-temperature kilns in various industries. In the metallurgical industry, refractory castables are often used for the lining of smelting equipment such as aluminum melting furnaces, open furnaces, alloy furnaces, converters, arc furnaces, and smelting furnaces. The use of refractory castables can protect the furnace walls and furnace bottoms that need to contact with high-temperature media and avoid high-temperature erosion and severe corrosion and wear. The use of refractory castables can effectively extend the service life of high-temperature smelting furnaces and improve production efficiency. In the cement industry, in cement kilns, the temperature of clinker burning can reach hundreds of degrees Celsius or even higher, which places extremely high demands on the lining materials of the kiln. Using refractory castables as kiln linings can effectively reduce kiln wear and corrosion, extend the...
Refractory castables are commonly used refractory materials for the lining of kilns in the thermal industry. They are widely used in the construction and maintenance of high-temperature kilns, ironmaking furnaces, glass kilns, and other equipment. Correctly selecting suitable refractory castables is the premise for ensuring the stable operation of the kiln, and it is also the key to improving the overall service life of the kiln. So what are the selection tips for using refractory castables to choose suitable refractory castables? 1. Determine the working environment and conditions of the kiln When selecting refractory castables, first determine the working environment of the kiln, such as working temperature, working medium, thermal shock resistance, chemical erosion resistance, etc. After understanding the working environment of the kiln, select the appropriate refractory castable. 2. Determine the material of the refractory material The main raw materials of refractory castables include alumina, silicate, silicon carbide, etc. It is crucial to select suitable refractory materials according to the use environment and requirements. For example, in high-temperature environments, alumina refractory castables usually have better high-temperature resistance; while silicon carbide refractory castables are suitable for occasions with high requirements for chemical corrosion resistance. 3. Consider the performance of refractory...
After pouring, refractory castables need to be hardened and baked before they can be used. How many days does this process usually take before they can be put into use? When using refractory castables for equipment lining or repair, the curing and use time after pouring is an important issue in project implementation. First, we want to understand the construction process of refractory castables. After the refractory castables are poured, they need to go through a hardening process. After the initial hardening is completed, the casting body needs to be de-molded. After demolding, the refractory castables need to be baked before they can be put into use. This is a process that refractory castables need to go through before they can be put into use. Next, I will briefly tell you about the time of these processes of some common refractory castables. The process from pouring the refractory castable to hardening and demolding generally takes 36-48 hours, which is the hardening to demolding time of some common refractory castables. After that, it needs to be cured for some time before it can be baked. The curing time is generally 3-7 days. The refractory castable that has been cured needs to...
High-aluminum castable is a kind of high-aluminum refractory material frequently used in metallurgy, building materials, glass, and other industries. Its refractoriness directly affects the stability of the production process and the guarantee of product quality. The refractoriness of 75 high-aluminum castable is one of the focuses of attention in the industry. 75 high-aluminum castable mainly refers to refractory castable with an alumina content of more than 75%. This castable is widely used in the lining of high-temperature industrial equipment such as metallurgical furnaces, converters, electric furnaces, glass kilns, etc. due to its excellent refractoriness. Under normal circumstances, the refractoriness of 75 high-aluminum castable is above 1650℃. This temperature range just covers the working temperature of most high-temperature industrial equipment, ensuring its stability and durability in high-temperature environments. Although 75 high-aluminum castable can reach more than 1650℃, its refractoriness is often affected by factors such as material formula, production process, construction method, and use conditions. Therefore, when selecting and using it, it is necessary to make comprehensive considerations according to the specific situation. Therefore, when choosing a supplier of 75 high-aluminum castables, you also need to consider their production process level, quality control capabilities, and after-sales service. Only by choosing a...
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