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Refractory brick is a shaped material used in high-temperature industrial kilns. It is mainly used for masonry furnace walls of high-temperature kilns. At present, refractory bricks are primarily divided into silicon-aluminum refractory bricks, alkaline refractory bricks, carbon-containing refractory bricks, chromium-containing refractory diamonds, zirconium-containing refractory bricks, magnesium-containing refractory bricks, etc., according to the composition. The types are very rich. At the same time, refractory bricks can be divided into standard refractory bricks, ordinary refractory bricks, and specific refractory bricks according to their shape. Therefore, refractory bricks can be made into refractory materials of different materials and sizes to meet the different needs of high-temperature industrial kilns. The physical and chemical indicators of refractory bricks are also very diverse. They are used to meet different working media. The refractory temperature is generally between 1350℃ and 1790℃. The refractory temperature of some refractory bricks with high-quality ingredients can reach about 2000℃. Not only that, refractory bricks also have a series of characteristics such as corrosion resistance, creep resistance, and thermal shock resistance. They can maintain stability under high-temperature environments and provide a stable working environment for kilns. Since refractory bricks are divided into different brands and types when we choose refractory bricks, we...
The construction of refractory castables should be carried out strictly by the construction specifications to ensure the construction quality and progress. During the construction period, the refractory materials should be kept in a ventilated and dry place. During summer construction, the refractory castables should be placed in a cool and dry place, and outdoor exposure is prohibited. The following is the construction process of refractory castables: 1. Before construction, the construction equipment and construction site should be cleaned. No mud, sand, lime, silicate cement, or other debris should be mixed into the castables, and all tools and equipment in contact with the castables should not be sticky with the above substances. 2. The mixing of castables should use a forced mixer, and the mixing water must be clean water with a pH value between 6-8 and a dosage of 7-8%. It is strictly forbidden to mix castables of different brands or manufacturers until the materials are uniform. 3. When mixing, pour all the materials in the bag (including the main material and small bags of auxiliary materials) into the mixer. No residue can be left, and no part can be taken out for use. First dry mix for 2-3 minutes,...
After pouring the refractory castable, you need to wait until the entire castable is poured before you can carry out normal furnace baking operations. So how long does it take to bake the furnace after the castable is finished? Generally speaking, after pouring the refractory castable, it takes 24 hours for the castable to harden before demolding, and then natural curing, which takes about 3 days to bake the furnace, to avoid the refractory castable from falling off or bursting during the furnace baking process due to inadequate hardening. The pouring quality of the refractory castable and the time of the middle road activation are directly related to the use effect and life of the furnace, so before the early production, this process must be there, and it takes a long time. In addition to natural solidification, furnace baking also takes a lot of time, and it must be carried out strictly by regulations, to ensure the quality of the refractory castable and the stability of the kiln after production. We all know that a refractory castable furnace is very important for refractory castable. For kiln, baking affects the service life of the kiln. If the furnace is not baked...
A ceramic heat storage body for the heating furnace is generally used in the heat storage chamber of the heating furnace. It can store heat at high temperatures and release heat at low temperatures so that the temperature in the heating furnace can be kept stable. It can improve the thermal efficiency inside the heating furnace, and reduce energy consumption and exhaust gas emissions. Therefore, it is a common refractory material in heating furnaces. So, which ceramic heat storage body for the heating furnace is cheaper? The price of ceramic heat storage bodies for heating furnaces is mainly affected by the specifications, brand, quality, and other factors of ceramic heat storage bodies. Not only that, whether it is a manufacturer is also a factor affecting its price, because it is directly the ex-factory price. As a manufacturer of ceramic heat storage bodies, Henan Xinhongji Refractory Materials has many years of production and research and development experience. The ceramic heat storage bodies it produces are widely used in high-temperature kilns in various industries. At present, the ceramic heat storage bodies produced by our factory have various specifications, strong heat storage capacity, high strength, and high-temperature resistance, and can be adapted to...
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...
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