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Preparation process of wear-resistant and refractory castables: Ingredients: Select appropriate refractory aggregates, powders, additives, and binders according to the required properties, and proportion them in a certain proportion. Mixing: Mix the prepared ingredients to ensure that the various ingredients are evenly distributed. Pouring: Pour the mixed castable into the prepared mold and vibrate or compact it to ensure that the castable fills the mold and expels air bubbles. Hardening: Place the poured refractory castable in an appropriate environment for hardening. Hardening times and temperatures will vary depending on the specific bond. Demoulding: After waiting for the refractory castable to harden, demould it from the mold. At this time, the refractory castable has been initially formed. Drying and Curing: The castables after demoulding need to be dried and cured. This process usually requires placing it in a constant temperature and humidity environment so that it gradually loses moisture and increases strength. The length of drying and curing time depends on the specific binder and environmental conditions. Heat Treatment: To make the refractory castable have better high-temperature resistance, it needs to be heat treated. This usually involves heating and holding at a certain temperature. The heat treatment temperature and time will vary...
Wear-resistant refractory castable is an amorphous material widely used in metallurgy, petrochemicals, building materials, electric power, and other industries. This material has the advantages of high-temperature resistance, wear resistance, and corrosion resistance. It is used to repair and protect the lining of high-temperature equipment such as furnaces and boilers to increase the service life of the equipment. The main components of wear-resistant refractory castables include refractory aggregates, powders, additives, and binders. Wear-resistant refractory castables are widely used in the manufacturing and maintenance of various high-temperature industrial equipment, such as steel, non-ferrous metals, chemicals, petroleum, electric power, ceramics, and other fields. Specific application scenarios include: 1. Maintenance and protection of the lining, furnace mouth, hearth, and other parts of metallurgical furnaces such as blast furnaces, converters, and electric furnaces. 2. Refractory lining for high-temperature equipment such as gasifiers, circulating fluidized bed boilers, and waste incinerators. 3. Wear-resistant and fire-resistant protection for chemical equipment such as petrochemical reactors, cracking furnaces, and hydrogenation units. 4. Refractory lining for high-temperature building materials equipment such as glass furnaces and ceramic kilns. 5. Fire protection for power generation equipment such as thermal power plant boilers, thermal power plants, etc. 6. Wear-resistant and refractory castables have good...
The composition of fire-resistant and wear-resistant plastics is similar to other amorphous refractory materials. It is composed of refractory aggregates and powders, binders, and plasticizers. Special admixtures can be added according to different use requirements. There are many types of fire-resistant and wear-resistant plastics. According to the binding agent, they are clay-bonded plastics, phosphate-bonded plastics, aluminum sulfate-bonded plastics, tar-asphalt or resin-bonded plastics, etc.; according to the materials, they are silicone, clay, high alumina, corundum, zircon, carbon or silicon carbide, magnesia, and magnesium chromium, etc. Commonly used refractory plastics are mainly aluminum silicate (clay or high alumina) plastics. Fire-resistant and wear-resistant plastics have good medium and high-temperature bonding strength, good wear and thermal shock resistance, and are resistant to peeling. Fire-resistant and wear-resistant plastics are widely used in industrial kilns in the metallurgy, petrochemical, electric power, and machinery industries. They are mainly used as thermal shock-resistant, erosion-resistant, and wear-resistant linings; such as burners for heating furnaces and cement rotary kilns. The discharge port, the feed port of the vertical kiln, the lining of the high-temperature cyclone separator, the roof and furnace wall lining of the steel rolling heating furnace, and can also be used as the lining of various heat treatment...
The demand for refractory materials continues to grow in industry and construction. Wear-resistant and fire-resistant plastic, as a new type of refractory material, has gradually become an ideal choice in many fields with its unique properties and excellent wear-resistant and fire-resistant properties. Xinhongji Refractory will introduce in detail the performance and application of wear-resistant and refractory plastics. Wear-resistant and refractory plastic has the following properties: 1. High wear resistance: Refractory plastic contains special wear-resistant ingredients in its composition, allowing the material to maintain good wear resistance at high temperatures. This makes it highly practical in environments with high temperatures, high pressure, and severe wear. 2. Excellent fire resistance: This material has good fire resistance and can withstand extremely high temperatures (usually above 1000°C). In the event of fire or other high-temperature conditions, wear-resistant and fire-resistant plastics can effectively prevent the spread of fire and protect equipment and building structures. 3. Good plasticity: Compared with other refractory materials, wear-resistant refractory plastics have better plasticity and can be easily molded into various shapes and sizes to adapt to the application needs of different scenarios. 4. Low thermal conductivity: Wear-resistant and refractory plastics have low thermal conductivity, which can effectively slow down the...
High-temperature ceramic wear-resistant castable is a castable made of high-temperature ceramic particles and wear-resistant materials mixed through a special process. Its main feature is that it has extremely high wear resistance and high temperature resistance, and is suitable for use in high temperature and heavy load conditions. The following is an introduction to high-temperature ceramic wear-resistant castables: Composition High-temperature ceramic wear-resistant castables mainly comprise high-temperature ceramic particles, wear-resistant materials, binders, and other ingredients. Among them, high-temperature ceramic particles are a kind of high-temperature ceramic material, mainly composed of alumina, zirconia, yttria, and other materials, which have excellent high-temperature wear resistance. Wear-resistant materials are added to improve the wear resistance of the castables, and materials such as silicon carbide and boron carbide are usually used. Binders are added to improve the adhesion and plasticity of castables, and materials such as aluminum silicate are generally used. Performance Characteristics 1. High-temperature resistance: High-temperature ceramic particles have extremely high-temperature stability and can maintain stable performance in high-temperature environments. The use temperature of wear-resistant castables is generally above 1500°C. 2. Wear resistance: The mixture of high-temperature ceramic particles and wear-resistant materials can greatly improve the wear resistance of the castable, making it have excellent wear...
High-temperature-resistant cement, as the name suggests, is a special cement that performs well in high-temperature environments. It has high compressive strength, heat resistance, chemical corrosion resistance, and low thermal expansion coefficient. It is suitable for engineering projects in harsh environments such as slag, high-temperature gas, and chemical corrosive substances. High-temperature resistant cement is mainly used in high-temperature industrial fields such as metallurgy, petrochemicals, and electric power, as well as in the construction and maintenance of high-temperature facilities such as furnaces, chimneys, smelting furnaces, and chemical equipment. (High-temperature resistant cement also becomes aluminate cement, refractory cement, and high alumina cement) The main features of high-temperature resistant cement are as follows: 1. High-temperature resistance: The sintering temperature of high-temperature resistant cement is as high as 1300-1600 degrees Celsius, which can maintain stable performance in a long-term high-temperature environment and is suitable for various high-temperature facilities and equipment. 2. High compressive strength: High temperature-resistant cement has high compressive strength and can withstand large mechanical loads, making it suitable for high-strength and high-pressure engineering applications. 3. Good chemical corrosion resistance: High-temperature-resistant cement has good corrosion resistance against various chemical media such as acids, alkalis, and salts, and can maintain a long service life in...
Aluminous Cement, also known as high alumina cement or calcined aluminate cement, is a special refractory cement made from ores (such as kaolin, bauxite, gangue, etc.) and calcined at high temperatures. The main component of aluminate cement is calcium aluminate (CA), which has a high aluminum oxide (Al2O3) content, usually between 40% and 70%. Aluminate cement has the following characteristics 1. Shorter initial and final setting times: Compared with ordinary Portland cement, aluminate cement sets faster and can reach a certain strength in a short time, which is beneficial to shorten the construction period. 2. Suprior high-temperature performance: Aluminate cement has high fire and heat resistance, and can maintain stability and mechanical properties in high-temperature environments. Therefore, it is often used in refractory materials and high-temperature equipment. 3. Chemical corrosion resistance: Aluminate cement has good acid resistance, alkali resistance, salt-resistance, and corrosion resistance, and is suitable for use in chemical, petroleum, and other industries where chemical corrosion may occur. 4. Thermal shock resistance: Since aluminate cement has a low thermal expansion coefficient, it can better resist thermal stress when temperature changes and has strong thermal shock resistance. 5. Anti-permeability: Aluminate cement has good anti-permeability, which can effectively prevent the penetration...
Ladle castable is made of high-quality high-alumina bauxite clinker and silicon carbide as the main materials, and is composed of pure aluminate cement binder, dispersant, anti-shrinkage agent, coagulant, explosion-proof fiber, and other admixtures. Shaped refractory castables are also called aluminum silicon carbide castables due to their good effect on the working layer of the molten iron ladle. The working environment of Ladle The temperature of molten iron is 1300-1450℃. The reason why the lining material of the ladle requires frequent inspection or maintenance is due to the working environment that is better than that of high-temperature resistant materials: 1. When containing molten iron, the lining is impacted by high-temperature molten iron, causing erosion and wear and strong thermal shock stress; 2. During the period of holding molten iron, it is subject to chemical erosion by molten iron and slag and oxidation in the air; 3. When pouring molten iron, it will be washed away by the molten iron and oxidized at high temperature; 4. After the molten iron in the molten iron ladle is emptied, the temperature drops sharply, causing the ladle lining to cool rapidly and be exposed to the air and oxidize; In such a process, the lining...
Refractory concrete is a material composed of refractory aggregate, refractory powder, and cement or additional additives in a certain proportion. After mixing, shaping, and curing, it can be used directly. Composition of refractory concrete 1. Refractory aggregate: Refractory aggregate is the skeleton of refractory concrete and plays an important role in the high-temperature physical and mechanical properties of refractory concrete. 2. Refractory powder: Refractory powder can improve some properties of cement binders, reduce the amount of cement, increase the workability of refractory concrete mixtures and the tightness of concrete, and improve fire resistance. 3. Cementing agent: The main function of the cementing agent is to gel and combine refractory aggregates and refractory powders to form refractory concrete with certain properties. 4. Admixtures: There are many admixtures, such as coagulants, water-reducing agents, mineralizers, and expansion agents. Generally, the dosage is small, and its main function is to improve and enhance the performance of refractory concrete to better meet the requirements of construction and use. Characteristics of refractory concrete 1. The production process is simple, the production cycle is short and the efficiency is high. 2. It is easy to construct and manufacture and can be arbitrarily shaped to meet various requirements...
For large-scale construction of phosphoric acid and phosphate refractory castables using vibration molding and other methods, trapping materials is an effective and economical method, so it is widely used. After weighing the trapped material, add coagulant and stir evenly, then add the remaining cement and continue stirring for 1 to 2 minutes before it can be used for molding. The material trapping time is mainly determined based on the chemical reaction speed between the cement and the metal contained in the refractory aggregate and powder, as well as environmental temperature and other conditions. Phosphoric acid combined refractory castable samples were stored indoors, in the open air, and castable standard curing rooms. As the storage time increased, their normal temperature compressive strength increased, but indoor storage was better than outdoor storage. After 3 months of standard curing, the intensity tends to decrease slowly. When stored indoors, the compressive strength after burning is more than 10Mpa higher than that in the open air. The post-burning compressive strength stored in a standard curing room is also better than that in the open air. Samples stored in the open air may have lower performance than refractory castables due to changes in cold and heat...
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