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After the construction of the high-temperature kiln is completed, the oven must be dried for some time. The oven is very important for the high-temperature kiln. If the oven is not used properly, it will cause the refractory material to peel off and reduce the service life of the kiln. Therefore, in the oven, you must strictly follow the oven precautions when drying the oven correctly. Today I will take you to understand the precautions for operating a silica brick hot blast stove oven. 1. The oven is required to heat up according to the oven curve. 2. Before igniting the oven, the hot blast furnace flue valve is open and other valves are closed. During the oven, a low negative pressure needs to be maintained in the hot blast furnace (the opening of the flue valve is adjusted according to the flue gas temperature and top suction force). In the early stage of ignition, an ignition gun is used to raise the temperature. One flue valve can be completely closed and the other flue valve can be adjusted for valve opening. 3. When the gas pipeline network pressure is low, contact dispatch in time to ensure the gas supply...
Overview of the Production Process of Refractory Castables Overview of the production process of refractory castables: 1. Crushing: A jaw crusher is used for the coarse crushing of raw materials, mainly used for the coarse crushing of large pieces of material. 2. Crushing: Medium and fine crushing of refractory raw materials. Equipment includes cone crushers, roller crushers, dry mills, etc. 3. Screening: Screen the crushed materials according to particle size. The equipment includes a fixed inclined screen and an electromagnetic vibrating screen. 4. Fine grinding: To produce refractory powder, the equipment includes a ball mill, tube mill vibration mill, etc. 5. Premixing: Premix powder materials such as additives, admixtures, binders, and fine powders in advance. The equipment is a double spiral conical mixer, etc. 6. Ingredients scale: Electronic weighing is generally used to ensure accurate weighing. 7. Mixing: Use a forced mixer to mix the materials. The mixture can be fed into the packaging machine and then packaged, or it can be directly packaged into bags from the outlet of the mixer. 8. Distribution and sealing: Use dispensing equipment for dispensing, and then use a sealing machine to seal the bag or tape to seal the box. 9. Finished product...
Quick-drying explosion-proof refractory castable is a castable material with high performance, high strength, corrosion resistance, and explosion resistance. It is mainly composed of bauxite clinker, alumina powder, aluminate, and other materials, with an appropriate amount of binders, additives, etc. Quick-drying explosion-proof refractory castables have the following characteristics: Good quick-drying performance: it can reach high strength in a short time and can eliminate a lot of moisture in a short time. Good explosion-proof performance: Because it is exposed to severe corrosive and humid environments during production and use, it has good explosion-proof performance and will not rupture or explode due to sudden temperature rise or external collision. Good fire resistance: It can withstand extreme working conditions such as high temperature and flame impact. It has good corrosion resistance and can be used in strong corrosive media such as acid, alkali, and heat. Good pouring performance: It has good fluidity and slump properties, and can well maintain the shape of the cast parts. Quick-drying explosion-proof refractory castables are widely used in the maintenance, reinforcement, renovation, and new construction of various high-temperature industrial equipment. Such as various furnaces, pipes, chimneys, boilers, and other equipment in electric power, petrochemical, metallurgy, cement, glass, paper, and...
Clay refractory mud is a refractory material with clay and fine stone powder as the main materials. It is mainly used for repairing high-temperature furnaces, ovens, chimneys, stoves, fireplaces, and other refractory structures, sealing boundary interfaces, laying refractory bricks, and bonding insulation materials. Clay refractory mud has high-temperature resistance and fire resistance. It can still maintain stable performance under high-temperature conditions below 1500°C and is not easy to fall off or crack. In addition, clay refractory clay also has good plasticity and adhesion, so it can be easily shaped into various complex shapes and structures. Clay mud with a specific viscosity is made by mixing powdered clay and water. When using, first clean the area to be repaired, stick the clay refractory mud to the location that needs to be repaired, and fully compact it. The clay refractory clay will then harden rapidly over time to form a strong repair layer that is very fire resistant. It is worth noting that clay refractory mud is only suitable for low-temperature combustion or heating places. If used at high temperatures, the clay refractory mud may fall off or crack, thereby reducing the performance of the clay refractory mud, for places used at...
Clay refractory bricks are a common type of refractory material with good fire resistance, corrosion resistance, and mechanical strength. They are widely used in various high-temperature environments in industrial equipment, furnaces, and buildings. Material composition and characteristics of clay refractory bricks The main components of clay refractory bricks are clay and kaolin, and a certain proportion of auxiliary materials such as quartz sand, bauxite, and coal gangue are usually added. The content of clay is usually between 50% and 70%, while the content of kaolin is between 10% and 30%. Clay refractory bricks have the following characteristics: 1. Good fire resistance: Clay refractory bricks have good high-temperature resistance, usually able to withstand temperatures above 1000℃, and some can even reach temperatures above 1500℃. 2. Strong corrosion resistance: Clay and kaolin in clay refractory brick materials contain high levels of silicates and aluminates, which can resist various acids, alkalis, salt, and other chemical corrosion. Therefore, they are widely used in fields such as chemical engineering, metallurgy, and power. 3. Good wear resistance: Clay refractory bricks have high hardness and density, and their surface is not easily worn, so they can maintain surface smoothness and mechanical strength for a long time at...
High aluminum wear-resistant castable is a specially designed refractory material with high fire resistance and good wear resistance. This material is mainly used for the refractory lining of various high-temperature industrial furnaces, especially those parts that need to withstand high wear. The following is a detailed introduction to high-aluminum wear-resistant castables. Main ingredients and raw materials High-aluminum wear-resistant castables are based on high-aluminum materials (such as alumina, corundum, etc.), and add other auxiliary materials (such as quartz powder, mica, calcium silicate, etc.). In addition, special wear-resistant materials such as zirconia, corundum, etc. are added to improve the wear performance of the material. Features and performance 1. Fire resistance: High aluminum wear-resistant castable has excellent fire resistance and can withstand high temperatures up to 1800°C. Its high fire resistance is mainly due to the high content of alumina and corundum, two materials with high melting points and good fire resistance. 2. Wear resistance: Special wear-resistant materials are added to high-aluminum wear-resistant castables to improve the hardness and wear resistance of the material. This gives it a long service life under high temperatures and high pressure conditions. 3. Slag resistance: High-aluminum wear-resistant castables have good slag resistance and can effectively resist the...
Silicon carbide, also known as emery or refractory sand, is a ceramic-like compound formed by bonding silicon and carbon. Emery exists in nature in the form of a rare mineral such as moissanite. There are very few natural ones, and the ones used in industry are all synthetic raw materials. Silicon carbide is the main raw material for silicon carbide bricks and silicon carbide castables. Today I will give you a brief introduction to some aspects of silicon carbide, hoping it will be helpful to you. There are at least 70 crystal forms of silicon carbide. α-SiC is the most common allomorph. It is formed at high temperatures above 2000℃. It has a hexagonal crystal structure (like wurtzite). The unit cell is a face-centered cubic structure. Each unit cell contains 4 C atoms and 4 Si atoms. Similar to diamond structure. β-SiC, with a cubic crystal structure, is similar to diamond. It is generated below 2000℃. β-SiC will transform into α-SiC above 2100℃. As for another type of silicon carbide, μ-SiC is the most stable and there is a more pleasant sound when colliding. These two types have not yet been commercially applied. The silicon carbide produced industrially in my...
Unshaped refractory materials mainly include three types: refractory castables, refractory mortars, and refractory cement. Refractory castables are the most widely used unshaped refractory materials. It is mainly used for the lining of heating equipment such as various heating furnaces and kilns. Some high-quality varieties can also be used for high-blast furnaces. Refractory mortar is a joint refractory material (available in powder form and mud form). Used as joint material for refractory masonry. It consists of refractory powder and admixtures, and of course, the finished product is usually mixed. Refractory cement comes in two forms: dry powder (in bags) and mud (in barrels). Refractory cement (not ordinary cement) is a refractory material used as a binder and refractory powder when manufacturing refractory castables. It is a semi-finished product. The summary is: that both castables and refractory cement are refractory products that can be used directly; while refractory cement is the binder of refractory castables (refractory concrete) and cannot be used alone. Fireclay as a raw material is often called “refractory clay” and is usually made into clay bricks and clay refractory castables. But for “refractory clay”, we generally should not think of it as “refractory mortar”. Usually refractory mortar is considered...
Refractory balls, also known as refractory ceramic balls, are usually made of industrial alumina and refractory kaolin as the main aggregates. They are known for their high mechanical strength, long life, strong chemical stability, and impressive heat resistance. , some variants of which are capable of withstanding temperatures up to 1900°C. Application of refractory balls Refractory balls are especially suitable for high and low-temperature conversion furnaces, reforming furnaces, hydro converters, desulfurization tanks, methanation furnaces, etc. in fertilizer plants. They disperse gases and liquids and support, cover, and protect catalysts. Additionally, these refractory ceramic balls are used in hot blast furnaces and heating retrofit equipment in the steel industry. Types and materials of fire-resistant balls 1. Based on refractoriness Refractory ceramic balls are divided into ordinary refractory balls and high alumina refractory balls. Ordinary refractory balls are suitable for converters and converters in the sulfuric acid and fertilizer industries, while high-aluminum refractory balls are suitable for hot blast furnaces and heating converters in urea, steel, and other industries. 2. Based on materials Refractory balls can be made from a variety of materials, including high alumina, silica, and magnesium aluminum, each with different properties making them suitable for specific applications: High aluminum...
The main ingredients in chrome corundum bricks are alumina and chromium, which are held together by a solid binder. The specific bonding mechanism can vary based on the manufacturing process and the specific composition of the brick. Chrome corundum bricks are known for their unique composition and properties. It is widely used. Today I will take you to understand its characteristics. 1. High-temperature resistance: Chrome corundum bricks have excellent thermal stability and are suitable for use in high-temperature environments. They can withstand temperatures up to 1800°C, making them ideal for applications in industries such as steel, cement, glass, and non-ferrous metals. 2. Chemical resistance: Chrome corundum bricks have strong resistance to chemical corrosion, especially to alkali, slag, and molten metal. This corrosion resistance allows it to maintain structural integrity and performance in harsh chemical environments, making it suitable for use in furnaces and kilns where corrosive materials are present. 3. Wear resistance: Chrome corundum bricks have excellent wear resistance, making them durable. They can withstand the aggressive action of abrasives and ensure a long service life even in highly abrasive environments such as cement kilns or ladles. 4. High Mechanical Strength: These bricks have high compressive strength and structural integrity,...
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