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Refractory brick is a kind of refractory material, which is widely used in the construction of high-temperature environments and refractory structures. It has excellent fire resistance and good heat resistance and can maintain stable physical and chemical properties under high-temperature conditions. There are many types of refractory bricks, and some common refractory bricks will be introduced in detail below. 1. Aluminum silicate refractory bricks: Aluminum silicate refractory brick, also known as high alumina brick, is a refractory material made of high alumina and silicate as the main raw materials. It has the advantages of high strength, good resistance to molten slag, and strong oxidation resistance. It is often used in high-temperature equipment such as furnaces, converters, and glass kilns. 2. High-alumina refractory bricks: High-alumina refractory bricks are made of high-alumina alumina powder and silica fume as the main raw materials, which are made by mixing, molding, drying, and calcination. It has good thermal stability, corrosion resistance, and high-temperature strength, and is widely used in iron and steel, non-ferrous metal smelting, and other industries. 3. Mullite refractory bricks: Mullite refractory brick is a kind of refractory material made of mullite as the main raw material. It has good high-temperature resistance, excellent...
Corundum refractory brick is a high-temperature refractory material made of corundum minerals. The following are related characteristics and technologies The main component of corundum mineral is alumina, which has the characteristics of high hardness, high density, and high melting point, so corundum refractory bricks have the following characteristics. High-temperature stability: It can maintain stability at high temperatures for a long time, and it is not easy to burn out or burn brittle. Corrosion resistance: It has good acid and alkali resistance and oxidation resistance, and can resist chemical corrosion at high temperatures. Wear resistance: It has high hardness and density, which can resist mechanical wear at high temperatures. Pressure resistance: It has high compressive strength and can withstand pressure at high temperatures. Due to the above characteristics, corundum refractory bricks are widely used in the lining and insulation layer of high-temperature furnaces, electric furnaces, glass kilns, steel smelting, and other industries, which can ensure the normal operation of the equipment and prolong the life of the equipment. Corundum refractory brick technical parameters Key Ingredients: Corundum Mineral. Compressive strength: generally above 100MPa, can reach about 200MPa. Refractoriness: The refractoriness of corundum refractory bricks is generally above 1750°C, and can reach above...
The cooling zone of the rotary kiln is an important piece of equipment in the production process of the rotary kiln. The falling of refractory bricks in the cooling zone will have a bad influence on production. If this happens, the following measures need to be taken in a timely manner: Shutdown for maintenance: stop the machine in time to check the status of the cooling zone, confirm the number and location of the fallen refractory bricks, and replace the fallen refractory bricks in time. Maintenance: Strengthen the maintenance of the cooling belt, regularly check the condition of the refractory bricks on the cooling belt, and replace the aging bricks in time. Management: Strictly abide by the management regulations, keep the workplace clean and tidy, and reduce the accumulation of materials and the impact on the cooling zone. Improve operating skills: improve the skills and work experience of operators, strengthen operating specifications, and reduce damage to equipment caused by misoperation. Periodic inspection: conduct a comprehensive inspection regularly, including the transmission mechanism, bearings, lubrication system, etc., to find and deal with problems in time. It should be noted that if the refractory bricks on the cooling belt fall seriously, it is...
Refractory castable is a kind of unshaped refractory material. It has high fluidity and is constructed by pouring, so it is also called castable. Generally, it is cast on-site by pouring, vibration, or tamping. Refractory castables are different according to different usage occasions. So what are the types of refractory castables? 1. According to chemical properties, it can be divided into acid-resistant castables, alkali-resistant castables, neutral castables, and corrosion-resistant castables. 2. According to the density, it can be divided into light castable and heavy castable. 3. According to the composition of refractory raw materials, it can be divided into high alumina castables, silicon castables, mullite castables, corundum castables, silicon carbide castables, clay castables, etc. 4. According to the characteristics of use, it can be divided into high-temperature resistant castables, steel fiber castables, acid and alkali resistant castables, low cement castables, high strength wear-resistant castables, slag-resistant wear-resistant castables, anti-skinning castables, non-stick aluminum castables, etc. 5. According to the composition of the binder, it can be divided into organic bonded castables and inorganic bonded castables, such as resin-bonded castables and cement-bonded castables. 6. According to the bonding method of the selected binder, it can be divided into hydraulic c bonded castables, air-hardened...
Lightweight acid-resistant castables are mainly used in anti-corrosion flue and chimney linings, acid storage tanks, pickling tank linings, nitric acid shrinkage tower linings, acid recovery furnace linings, and other refractory castables that are corroded by acidic high-temperature gases. Lightweight Acid-resistant Castable Properties 1. It has the characteristics of light volume and high compressive strength. 2. It is resistant to acid and acid gas corrosion. 3. It has the characteristics of heat insulation, heat preservation, and low water absorption. 4. It can significantly improve the air tightness, integrity, and corrosion resistance of the inner lining Features of Lightweight Acid Resistant Castables 1. Low thermal conductivity. The thermal conductivity of lightweight acid-resistant castables is only 0.12-0.16W/(m·k), which is about 1/10 of that of ordinary concrete, so it can better play the role of thermal insulation. 2. High-temperature resistance. The castable can be used in a high-temperature environment of 1000°C for a long time without cracking or falling off and has excellent fire resistance. 3. Strong corrosion resistance. Lightweight acid-resistant castables have good acid and alkali corrosion resistance and can be used for a long time in strong acid, strong alkali, and other corrosive environments without damage or damage. 4. Simple construction. The...
High aluminum fire-resistant ball refers to a spherical refractory material with an alumina content of over 65%. It is widely used in equipment such as hot blast furnaces and heating transformation furnaces in urea, steel, and other industries. It has the characteristics of high-temperature resistance, low wear, corrosion resistance, and high strength. Due to the curved surface structure of the ball, it increases gas fluidity and plays a good role in preventing gas dust and ash from blocking and causing slag formation, so it is widely used, Today, Xinhongji Refractory will take you to briefly understand the dimensions of high aluminum fire-resistant balls. Generally speaking, high-alumina refractory balls will use refractory balls with different alumina content according to different use occasions. At the same time, according to the size of the furnace used and the different working conditions, refractory balls with different diameters will be selected. The types of alumina content of the more common high-alumina refractory balls on the market are 65%, 70%, 75%, and 85%. Currently, there are more high-alumina refractory balls used. 50mm, and 60mm, are relatively common high alumina refractory ball sizes. Some of the sizes of the high alumina refractory balls introduced above are relatively...
High-purity corundum brick refers to a high-temperature refractory brick with an alumina content of more than 90%. It is a refractory product with corundum as the main crystal phase. It has good chemical stability and is resistant to acidic or alkaline slag, metal Liquid glass, etc. have strong resistance. Characteristics of high-purity corundum bricks 1. It has high normal temperature compressive strength and high load softening start temperature. 2. It has good chemical stability and good corrosion resistance of molten glass. 3. Good wear resistance and erosion resistance, long service life The use of high-purity corundum bricks In the glass industry, high-purity corundum bricks are mainly used as the upper space of the glass kiln that is not in contact with the glass liquid, as well as the slides and rails of the steel rolling heating furnace, and can also be used as the residue gasifier, coal gasifier, carbon black reaction furnace, Lining material for pulp waste liquid gasifier and other industrial furnaces. The production process of high-purity corundum brick The production process of sintered corundum bricks is to crush the sintered corundum bricks to 3mm coarse particles and some fine powders less than 0.074mm, and some of them add...
Sintered AZS brick for glass kilns is a kind of refractory material used in glass kilns with zircon and alumina as the main raw materials. AZS stands for A12O3, ZrO2, and SiO2 respectively. It is an indispensable refractory for key parts of the glass kiln. The material can be in direct contact with the glass liquid and can resist the erosion of the glass liquid at the same time. Features of sintered AZS bricks for glass kiln 1. High refractoriness. Sintered AZS bricks have high refractoriness and can reach above 1790°C, which is a high-grade refractory material. 2. High softening temperature under load. Sintered AZS bricks have fewer impurities, and the load-softening temperature of aluminum-zirconium products can be above 1550-1650 °C. 3. Good thermal shock resistance. Sintered AZS bricks for glass kilns have good thermal shock resistance. 4. Good chemical corrosion resistance. Aluminum-zirconium refractory products are resistant to acid or alkaline slag, molten metal erosion, oxidation, and reduction reactions, and are enhanced with the increase of AL2O3 content and the decrease of harmful impurity content. The development of my country’s glass industry is relatively rapid, and it has been at the forefront of the world in recent years. The rapid...
The high-temperature flue with a diameter of 2 meters needs to use high-quality refractory bricks to ensure its stable operation and long-term use. When selecting high-temperature flue refractory bricks, the following factors need to be considered: Refractory grade: High-temperature flue requires the use of refractory bricks that can withstand high temperature and flue gas erosion. Commonly used fire resistance grades include SK-30, SK-32, SK-34, SK-36, SK-38, etc. Generally speaking, bricks with high refractory grades such as SK-36 or SK-38 can be selected for high-temperature flues with a diameter of two meters. Composition of materials: High-temperature flue refractory bricks are mainly composed of high-temperature refractory materials such as alumina and silicate and usually need to add a certain proportion of additives such as binders and combustion aids. Phosphate high alumina bricks with stable composition and reliable quality need to be selected. Brick shape and specification: The brick shape and specification need to be selected according to the actual shape and size of the flue. Common brick shapes include ordinary rectangular bricks, trapezoidal bricks, wedge-shaped bricks, etc. Common specifications include 230mm*114mm*65mm, 230mm*114mm*75mm, etc. Manufacturer reputation: The quality and performance of refractory bricks are closely related to the manufacturer’s production process, equipment, and...
Mix: 1. Equipment and tools: forced mixer, bucket scale, vibrator, tool shovel, trolley, etc. 2. Water consumption for construction: The amount of water added to steel fiber castables should be controlled at 7%-8%, and pure drinking water is required. 3. Requirements and control of construction environment temperature: The temperature of the construction site should be between 10-30 degrees Celsius. If the temperature of the construction site is lower than 10 degrees Celsius, it is necessary to adopt warming measures for construction. If the temperature at the construction site is higher than 30 degrees Celsius, necessary cooling measures must be taken before construction. Otherwise, it will cause difficulty in construction or performance degradation of this product, making it difficult to construct. 4. Mixing: Pour the bulk material and the small bag in the bag into the mixer for 3-5 minutes to make them mix evenly. When adding water, add 2/3 of the standard amount first, and then add the remaining water according to the specific construction requirements. Pour it into the mixed dry material and stir it fully for not less than 1–3 minutes to make it have suitable fluidity. 5. Precautions: The tools used in the construction process, such as...
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