Application Fields of Corundum Mullite Castables

Corundum mullite castables are a kind of ceramic material composed of corundum and mullite, which has the characteristics of high strength, high hardness, high wear resistance, and high-temperature stability. Corundum mullite castables are widely used in the industrial field, such as wear-resistant linings of high-temperature bearings, support linings of high-temperature furnace tubes, high-temperature kiln tools, etc. Its excellent performance makes it widely used in the field of high-temperature industry and can meet the requirements of high-temperature industry for high-temperature wear resistance, high-temperature strength, and other properties. In addition, corundum mullite castables can also be used in the field of aerospace, such as nozzles and combustion chamber linings of high-temperature aircraft engines. The application in the field of aerospace can improve the strength and service life of high-temperature components, which plays an important role in improving the performance and safety of aerospace vehicles. In short, corundum mullite castables have excellent performance and application range and have broad application prospects in high-temperature industry and aerospace.

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How to Choose Refractory Bricks for Hazardous Waste Incinerators

Selecting refractory bricks for use in hazardous waste incinerators requires consideration of a variety of factors, including fire resistance, chemical stability, corrosion resistance, and the ability to adapt to specific process conditions. The selection should be based on the chemical composition of the incinerated materials and the type of kiln. Here are some suggestions for choosing refractory bricks: Refractory temperature: Choose refractory bricks that meet or exceed the operating temperature of the incinerator. Generally, bricks with high refractory temperatures are required under high-temperature conditions. For example, for high temperatures exceeding 1500 degrees Celsius, you may need to choose corundum, mullite, silicon carbide, chromium-containing refractory materials, etc. Corrosion resistance: The gases produced by hazardous waste incinerators may contain acidic or alkaline substances, so corrosion-resistant refractory bricks are required. Materials such as alumina and aluminum silicate usually have good corrosion resistance. Thermal shock stability: Incinerators may experience rapid changes in temperature during operation, so refractory bricks are required to have good thermal shock stability to prevent the bricks from cracking or breaking due to temperature changes. Chemical stability: Choose refractory bricks that can withstand the chemical reactions and high-temperature conditions that occur during incineration. Ensure that the refractory bricks will not react...

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Refractory Materials Required for Acidic Environment of Push Plate Kiln

In the acidic environment of the push plate kiln, acid-resistant refractory materials need to be used to protect the kiln body from corrosion and high-temperature damage. A push plate kiln is a type of kiln used to produce ceramic products. It is an intermittent kiln that is loaded and unloaded periodically. It usually consists of a kiln body, a fire channel, a combustion chamber, and a smoke exhaust system. The working principle of the push plate kiln is that ceramic products undergo a series of heating, sintering, and cooling processes in the kiln. There are a series of push plates inside the kiln body. Ceramic products are pushed into the kiln through these push plates. After a certain time and temperature treatment, they are pushed out of the kiln by the push plate on the other side. The following are some commonly used acid-resistant refractory materials: Acid-resistant bricks: Such as aluminosilicate bricks (often called silica-alumina bricks), silicon carbide bricks, etc., which have high acid resistance and high-temperature resistance. Acid-resistant castable: For example, aluminum silicate castable is an acid-resistant refractory material used to cast the inside of the kiln body and can provide effective protection. Acid-resistant coating: Some special acid-resistant coatings...

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Composition and Classification of Corundum Bricks

Corundum brick is a high-temperature refractory material whose main component is alumina. Corundum is a crystal structure formed from aluminum oxide that is highly hard and wear-resistant. Corundum bricks can be divided into several main categories based on other ingredients and uses in corundum bricks: Ordinary corundum bricks: The main component is alumina and does not contain other special additives. This type of corundum brick is usually used in general high-temperature fire-resistant situations. Zirconium corundum bricks: Add a certain amount of zircon stone to alumina to improve the fire resistance and thermal shock stability of corundum bricks. This kind of corundum brick is suitable for harsh high-temperature process conditions. Chrome corundum bricks: Adding a certain amount of chromium oxide to alumina can improve the corrosion resistance of corundum bricks and is suitable for some high-temperature environments with corrosive atmospheres. Silicon carbide corundum brick: Silicon carbide is added to corundum brick to improve its wear resistance and impact resistance. This kind of corundum brick is often used in some industrial situations that require high wear and impact. Mullite corundum bricks: Adding an appropriate amount of mullite to corundum bricks can improve their slag resistance and thermal shock resistance. The classification of...

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Should the Kiln Use T3 Clay Bricks or High Alumina Bricks?

The choice of T3 clay bricks or high alumina bricks for the kiln depends on many factors, including the kiln’s usage environment, process requirements, budget, and required fire resistance. Usage environment: If the working temperature of the kiln is high and there are high-temperature heat and chemical corrosive substances, such as metal smelting furnaces, glass kilns, etc., it may be more suitable to choose high alumina bricks, because high alumina bricks have better performance at high temperatures: thermal shock resistance and corrosion resistance. If the kiln operates at a lower temperature and does not require particularly high fire resistance, such as a brick kiln, etc., T3 clay bricks may be a more economical and suitable choice. Process requirements: If the process in the kiln requires special treatment of the product, such as high-temperature calcination, chemical reaction, etc., the stability and durability of the material need to be considered. In this case, high-alumina brick may be more suitable because of its higher resistance to thermal shock and erosion. If the process requirements in the kiln are not high and only general firing or heating is performed, T3 clay bricks may be a more economical and suitable choice. Budget: Considering budget factors,...

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Introduction to Aluminum-chromium Amorphous Refractory Technology for Plasma Incinerators

Aluminum chromium amorphous refractory materials for plasma incinerators This technology uses thermal spraying technology to spray it directly to the surface of aluminum chromium bricks to protect the aluminum chromium bricks of the furnace wall from further eroded, which greatly extends the service life of the refractory material of the working layer, improves the plasma incineration furnace, work rate. It has the characteristics of high bonding strength with the original brick lining refractory materials, wear resistance, earthquake resistance, peeling resistance, strength, and durability, construction is not affected by seasonal climate and temperature, and is fast and convenient. The main innovation points are 1. The main raw materials are based on jade and chromium-oxide microfilming. 2. Adopt a new composite binding agent, so that the material has a good attachment performance, the rebound rate is low, and the loss of the material in the construction. 3. At the same time, it is ensured that the aluminum-chromium amorphous refractory material has a higher melting point during use and that the aluminum-chromium amorphous refractory material does not peel or peel during the heating process. The technical achievements of this project overall increased the use of refractory materials for the kiln working layer, ensured...

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How is White Corundum Produced in Refractory Materials?

White corundum is a high-purity alumina ceramic material. Its production process usually includes the following steps: Raw material preparation: Select high-purity alumina powder as raw material. These alumina powders are usually prepared by chemical methods, metallurgical methods, or high-temperature calcination methods. Ingredients and Mixing: The selected alumina powders are mixed in specific recipe proportions. During the mixing process, some auxiliaries or additives, such as binders, thickeners, etc., can be added to improve the molding performance and processing performance of the material. Molding: The mixed powder material is passed through a molding process, such as pressing, injection molding, or extrusion molding, to form a white corundum body with the required shape and size. The choice of molding method often depends on application requirements and product design. Sintering: After the white corundum body is formed, it needs to be sintered at high temperatures. During the sintering process, the white corundum body is placed in a high-temperature environment, usually between 1900°C and 2200°C, for continuous heat treatment. During this process, alumina powder particles are combined and rearranged to form a dense structure. Finishing and surface treatment: The sintered white corundum body can be finished and surface treated, such as cutting, grinding, polishing, etc.,...

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Can Inorganic Insulation Materials Be Used Instead of Fiber Products for Kiln Insulation?

Inorganic insulation materials can be used to replace fiber products for kiln insulation. Inorganic thermal insulation materials are a type of material with excellent thermal insulation properties in high-temperature environments. They are usually made of inorganic minerals, such as alumina, silicon oxide, magnesium oxide, etc. Compared with fiber products (such as refractory fibers), inorganic thermal insulation materials have some advantages and applicability, such as: High-Temperature Resistance: Inorganic insulation materials are generally able to withstand higher temperatures because they are composed of inorganic minerals that are resistant to high temperatures. Resistance to vibration and mechanical stress: Due to their hard nature, inorganic insulation materials have better resistance to vibration and mechanical stress and are suitable for some environments that require higher durability. Resistance to chemical corrosion: Inorganic insulation materials have good resistance to chemical corrosion and can be used in some applications involving corrosive gases or chemicals. Stability: The performance of inorganic thermal insulation materials is relatively stable under long-term high temperatures and is not prone to pyrolysis, decomposition, or reduction of thermal insulation performance. However, some issues need to be noted Weight: Inorganic insulation materials are generally dense and relatively heavy. This may affect the design of some applications. Thermal...

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How to Achieve Energy Saving and Heat Preservation in Rotary Kiln

Recommendations for high-strength thermal insulation materials: ultra-high-strength ultra-microporous thermal insulation modules. This product combines the compressive strength of heavy bricks with a body density of 2.3g/cm3 or above, and the light weight of a body density of 0.8g/cm3. Thermal conductivity of quality bricks. 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. A medium-sized clinker line with a daily output of 5,000 tons can save about 5,500 tons of standard coal annually. The rotary kiln in the cement industry alone can save companies 20 billion in fuel costs every year. Various types of rotary kilns are used in more than a dozen industries and can save companies hundreds of billions every year. The ultra-high-strength ultra-microporous thermal insulation module not only takes into account the compressive strength of heavy bricks with a body density of 2.3g/cm3 or...

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High-Temperature Corrosion Resistance of Chrome Corundum Bricks

Chrome corundum brick is a high-performance refractory material with good high-temperature corrosion resistance. Here are some of the key features of chrome corundum bricks: High-temperature resistance: Chrome corundum bricks can withstand very high temperatures, usually reaching more than 2000 degrees Celsius. This makes it perform well in high-temperature industrial environments, such as metallurgy, glass, cement, and other industrial fields. Corrosion resistance: Chrome corundum bricks have good resistance to chemical corrosion and acid and alkali corrosion. This allows it to maintain stable performance in the presence of some corrosive gases and chemicals. Thermal shock resistance: Chrome corundum bricks have good thermal shock resistance and can maintain structural integrity in environments with rapid temperature changes. High strength and hardness: Chrome corundum bricks have high strength and hardness, allowing them to withstand high temperatures, high pressures, and mechanical shocks. Generally speaking, chrome corundum brick is a refractory material that performs well in high-temperature and corrosive environments. It is often used in the linings, furnaces, and other parts of high-temperature industrial equipment. However, the specific performance may also vary due to manufacturing processes, material formulations, and other factors. It is recommended to understand the technical specifications and performance parameters of the specific product before...

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