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The heat storage ball is an indispensable energy storage material for high-temperature industrial kilns. It is used as a medium for heat storage and release in high-temperature processes. It is generally used in the combustion chamber and heat exchange area of the kiln to absorb and release heat, thereby improving the thermal efficiency and stability of the kiln. These balls can help the kiln use heat energy more effectively under high-temperature conditions, thereby reducing energy consumption and improving production efficiency. The amount of aluminum in the heat storage ball generally affects its refractory temperature, compressive strength, creep resistance, and other physical and chemical indicators. So how much aluminum does the general heat storage ball contain? At present, the main materials of heat storage balls are high-aluminum heat storage balls and corundum heat storage balls. Their aluminum content is also different. The more common aluminum content is 65%, 70%, 75%, 85%, etc. According to the different aluminum content, their refractory temperature and creep resistance are different. At the same time, the price of heat storage balls with different aluminum content is also different. The higher the aluminum content, the more expensive the price, so we should choose according to the actual...
The maintenance of refractory castables is a crucial step after the kiln is cast. Good maintenance can ensure that the kiln has a good working performance after it is put into use, and it can also increase its service life. During maintenance, the refractory castable can gradually reach the design strength while avoiding quality problems such as cracking and delamination. Next, let the editor take you to understand in depth why refractory castables need to be maintained: 1. Improve the strength of refractory castables Through proper maintenance, refractory castables can reach the design strength in a shorter time, ensuring that the refractory castables have sufficient refractoriness and wear resistance after being put into use. 2. Prevent refractory castables from cracking After the refractory castables are put into production, the rapid high temperature will cause thermal expansion of the refractory castables. If the maintenance is not in place, the internal moisture cannot be fully volatilized, and the refractory castables are prone to cracking. Therefore, oxidation before the initial production can allow the moisture in the refractory castables to fully volatilize, which can effectively reduce the occurrence of cracks. 3. Prevent refractory castables from falling off During the maintenance process of refractory...
The reduction of refractory castable strength can easily lead to the peeling and slag falling of the high-temperature kiln as a whole. In severe cases, it can even lead to the collapse of the kiln as a whole. There are many reasons for the reduction of castable strength. It may be a problem in the early construction or a problem of improper operation in the later stage. Therefore, the specific reasons are analyzed in detail. Today, the editor will introduce some common reasons for the reduction of castable strength: 1. Water-cement ratio is too high: ash ratio refers to the ratio of water to raw materials. If the water-cement ratio is too high, the moisture content in the refractory material will be too high, resulting in the overall fluidity of the refractory castable being too strong, and the whole will become loose, resulting in reduced strength. Therefore, in the process of adding water, water must be added strictly according to the water addition ratio. 2. Refractory material quality problem: If the quality of the refractory castable is too low, or too many foreign impurities are mixed in during the construction process, the overall strength of the refractory castable will be...
The T3 model represents the brick number of refractory bricks, also known as standard bricks. Its size is generally the most basic size of refractory bricks and is also the most widely used size of refractory bricks. The size of refractory brick T3 is 230mm×114mm×65mm, which is a standard rectangular block, representing its length, width, and height respectively. Its volume is generally 1704.3 cm3, which is one of the most common sizes of refractory bricks. T3 refractory bricks are straight refractory bricks, which are often used for the masonry of some conventional walls, such as some rectangular and square high-temperature kilns and other regular walls. In the masonry of some irregular walls, there are many other brick numbers and sizes of refractory bricks that can be used, so when masonry, it is necessary to select according to the masonry diagram in the drawing. At present, in addition to T3 refractory bricks, there are also common refractory brick sizes such as T38, T20, and T46, which are all used for the construction of refractory walls of different shapes and structures. There are thousands of sizes of refractory bricks according to the refractory brick size table. When choosing the size of refractory...
Hollow alumina balls are a high-temperature insulation material that can be made into various refractory and insulation products. The maximum use temperature is 1800℃. The products have high mechanical strength and low volume density. They are lightweight, hard, high temperature resistant, and corrosion resistant. The following will introduce some of the main applications of hollow alumina balls. 1. Hollow alumina balls are widely used in the field of filling materials Because hollow alumina balls have a low specific gravity and low thermal conductivity, they have good insulation properties, and can effectively reduce heat conduction and improve insulation effects, so they are often used in various insulation products, such as insulation surface layers, insulation wall panels, and insulation pipes. 2. Alumina hollow balls are also used to prepare lightweight materials Because alumina hollow balls have the characteristics of low volume density and high compressive strength, they are often used to make fillers for some lightweight composite materials. While reducing the weight of the product, the strength can also be guaranteed. By mixing alumina hollow balls with other basic materials (such as polymers, rubber, etc.), lightweight composite materials such as automotive parts, aerospace components, and sports equipment can be prepared. 3. Alumina...
The service life of refractory castables usually affects the life of the entire high-temperature kiln. The longer the service life, the longer the durability of the high-temperature kiln. Therefore, the service life of refractory castables is crucial. So, what are the factors affecting the service life of refractory castables? 1. Reasonable selection: When choosing refractory castables, we must make reasonable choices based on specific use occasions, use media, use temperature, and other factors, such as high temperature, chemical corrosiveness, thermal stability, creep resistance, and other factors. In this way, the refractory castable can resist the erosion of the corresponding medium during use and extend its service life; 2. Construction quality: The construction quality of refractory castables directly affects its service life. If the construction is not standardized and the bonding is not firm, the refractory castable will be easily damaged. 3. Hardening and baking: After the construction of the castable is completed, it must be hardened and dried for a certain period. After the hardening is completed, the refractory castable must be baked. During the baking process, it must be reasonably heated and baked according to the heating curve to avoid rapid cooling and heating to ensure that the castable...
There are many sizes of refractory bricks, which are generally selected according to the usage scenarios and needs. Reasonable sizes can increase the masonry speed of refractory bricks and improve the construction progress. Not only that, but the reasonable selection of refractory brick sizes is also the key to ensuring the performance and tightness of high-temperature industrial kilns. When choosing the size of refractory bricks, many factors need to be considered, including application scenarios, temperature requirements, structural design, etc. Generally speaking, the standard size of refractory bricks is 230*114*65 (mm), and the label of this size is T3. This brick is used more when building straight-up and down walls, such as furnaces, smelting furnaces, kilns, etc. However, not all applications are suitable for standard-sized refractory bricks. Sometimes, larger or smaller refractory bricks need to be customized according to specific needs to ensure the performance and safety of the equipment. There are hundreds of sizes of refractory bricks at present. Other common ones include T1, T20, T38, T46, two-piece, four-piece, four-piece, eight-piece, etc. Their sizes are 230*114*100mm, 230*114*(65/45)mm, 230*114*(65/55)mm, 275*230*150(mm)*60°, 230*114*20mm, 230*114*40mm, 456*230*65mm, 912*230*65, etc. Different equipment may have different internal space structures, so it is necessary to choose the appropriate...
Grate bricks are mainly used at the bottom of the kiln. They are arranged between the burner bricks and the heat storage honeycomb body. They play the role of fire blocking and fixing and protecting the heat storage body. They have an important impact and protective effect on the service life of the heat storage body. They can not only reduce the radiation effect of high-temperature furnace gas on the front heat storage body but also resist the erosion of some iron oxide sheets on the front heat storage body. In the coke oven, where are grate bricks mainly used? In the coke oven, grate bricks are used to build grate bars to support coke. In the Coke oven, grate bricks are usually located at the bottom of the Coke to support and fix the Coke to prevent the Coke from collapsing. Grate bricks are one of the key components in coke oven equipment. Their reasonable arrangement and fixed position are of great significance to the normal operation and production efficiency of the coke oven. Specifically, grate bricks are usually located at the bottom of the coke slag trough of the coke oven, or the grate trough and gaps are...
High alumina bricks and corundum bricks are both types of refractory bricks. Generally, high alumina bricks are more widely used, and the quality and refractoriness of corundum bricks are higher than those of high alumina bricks, so they are often used on special occasions. Therefore, its application range is narrower than that of high alumina bricks. Although the application fields are different, they show their unique performance advantages in different working environments. So what are the differences between high alumina bricks and corundum bricks? 1. Composition 1. High alumina bricks are a refractory material made of high alumina bauxite as the main raw material. At present, the common ones are special high alumina bricks, first-grade high alumina bricks, second-grade high alumina bricks, and third-grade high alumina bricks. 2. Corundum bricks are refractory materials made of high-purity corundum as the main raw material. At present, the common ones are chrome corundum bricks, zirconium corundum bricks, white corundum bricks, brown corundum bricks, etc. 2. Physical and chemical indicators 1. Refractoriness The refractoriness of high-alumina bricks is generally 1600-1780℃, while the refractoriness of corundum bricks can generally reach above 1800℃. The refractoriness of corundum bricks is higher than that of high-alumina bricks, so...
High-alumina castables are a common refractory material for the refractory layer of thermal equipment. They have excellent fire resistance, high-temperature resistance, and chemical stability. High-alumina castables are widely used in metallurgy, cement, glass, mining, aluminum, and electricity industries. In these industries, what are high-alumina castables mainly used for? 1. Metallurgical industry: In the metallurgical industry, high-alumina castables are widely used in the lining and refractory layer of equipment such as steelmaking furnaces, converters, and electric arc furnaces. Due to its excellent fire resistance and high-temperature resistance, it can effectively protect smelting equipment from high temperature and corrosion, thereby extending the service life of the equipment and improving production efficiency. 2. Cement industry: In the cement industry, high-alumina castables are often used for the lining of rotary kilns, cement calciners, calciners, and other kilns. It can withstand impact and erosion at high temperatures, protect the kiln wall from damage by heat and chemicals, and ensure the normal progress of cement production. 3. Glass industry: In glass melting furnaces and glass kilns, high-aluminum castables are used as lining materials, which can withstand the corrosion and erosion of high-temperature glass liquid, protect the furnace structure from damage, and ensure the stable production of...
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