High Alumina Bricks
Fused AZS Zirconia Corundum Bricks
Lightweight Mullite Bricks
Andalusite Bricks
Low Creep High Alumina Bricks
Fire Clay Bricks
Acid-Resistant High Alumina Bricks
Low Creep Fire Clay Bricks
High Alumina Insulation Bricks
Phosphate High Alumina Bricks
High Alumina Refractory Bubble Bricks
Corundum Bricks
Corundum Mullite Bricks
Chrome Corundum Bricks
High Alumina Refractory Castables
Corundum Castables
Corundum Mullite Castables
Zirconia-Corundum Casting Castables
Steel Fiber Castables
Mullite Castables
High Alumina Insulating Castables
Silicon Carbide Castables
Magnesia Alumina Spinel Castables
Refractory Ramming Mass
High Alumina Refractory Mortar
High Alumina Refractory Cement
Acid Resistant Castables
Alkali Proof Castables
Magnesia Bricks
Silica Bricks
Silicon Carbide Refractories
Refractory Precast Blocks
Chrome Corundum Casting Castables
Chrome Corundum Refractory Bricks
Refractory Ceramic Balls
Refractory Honeycomb Ceramic Regenerator
Refractory Corundum Ceramic Balls
Home > Knowledge
The steps to replace high alumina refractory bricks are as follows: 1. First lower the temperature of the furnace to room temperature and stop burning. 2. Then break the original high alumina refractory bricks and remove the residue. 3. Prepare new high-alumina refractory bricks and cut them into appropriate shapes and sizes as required. 4. Place the new high alumina refractory bricks in the corresponding position in the furnace. 5. Use refractory brick adhesive or refractory cement to bond the new high alumina refractory bricks to the original brick wall. 6. After the adhesive is dry, the furnace can be started again to let the new high alumina refractory brickwork together with other parts. The construction steps of high alumina refractory bricks are as follows: 1. Clean up the working surface and prepare the required tools and materials. 2. Cut the high alumina refractory brick according to the required shape and size. 3. Use refractory brick adhesive or refractory cement to bond high alumina refractory bricks to the required position. 4. After the adhesive or castable is dry, the furnace can be heated to make the high alumina refractory brickwork together with other components. It should be noted that the...
Rotary waste incinerator is a kind of equipment used to treat solid waste, which is usually in an environment of high temperature, corrosion, and high thermal stress. To meet these stringent conditions, commonly used refractory brick materials include: High alumina brick: High alumina brick is a refractory material whose main component is high-purity alumina. It has good heat resistance, wear resistance, and corrosion resistance, and is suitable for rotary waste incinerators in high-temperature environments. Aluminum silicate brick: Aluminum silicate brick is a refractory material mainly composed of alumina and silica. It has high fire resistance and thermal shock stability and performs well in high-temperature environments. Zirconium silicate brick: Zirconium silicate brick is a refractory material mainly composed of zirconia and silica. It has good fire resistance and corrosion resistance and can withstand high temperatures and corrosive gas. Corundum mullite brick: Corundum mullite bricks are made of corundum and mullite as the main raw materials, by adding the appropriate amount of alumina, silica ultrafine powder, and additives, and firing at high temperatures in an oxidizing atmosphere. anti-oxidation. It is not easy to react with O2, H2, CO, and other gases. Silicon carbide bricks: refractory bricks made of silicon carbide as the...
Refractory bricks usually need to be fired during the production process to ensure their mechanical properties and chemical stability. However, non-fired phosphate bricks do not use sintering and can achieve their dry basis by other means. Non-fired phosphate bricks have good chemical stability, high thermal strength, and good wear resistance. They are often used as the expansion port of the shaft kiln, the lining of the high-temperature zone kiln, and the cooling zone and transition zone of the rotary kiln. The corrosion resistance of wear-resistant bricks is better than that of phosphate bricks, and they are often used in the parts with severe abrasion above the iron bricks of the shaft kiln and the cooler and kiln mouth of the rotary kiln. Phosphate bricks use phosphoric acid solution with a concentration of 42.5% to 50% as a binder, and the aggregate is bauxite clinker calcined at a temperature above 1600°C in a rotary kiln. During the use of bricks, phosphoric acid reacts with the fine powder of fired bauxite in the bricks and refractory clay and finally forms a binder mainly composed of cristobalite-type aluminum orthophosphate. The drying principle is mainly realized by the evaporation and discharge of water. During...
Both corundum castables and corundum mullite castables are a type of refractory castables, both of which have high-temperature resistance and corrosion resistance, and are often used in the lining construction of high-temperature industrial kilns. Although they all contain corundum, there are great differences in the refractory temperature and physical and chemical indicators used. First of all, let’s first understand the “corundum” component contained in the two. Corundum is an oxide mineral whose main component is Al2O3. It has the characteristics of high hardness, high melting point, and corrosion resistance, so it is widely used in metallurgy and machinery. , chemical industry, electronics, aviation and national defense, and other industrial fields. As a refractory material, it has the characteristics of high-temperature resistance, corrosion resistance, and high strength, and is widely used in the lining of high-temperature kilns. The second is the “mullite” component in the corundum mullite castable. Mullite is a mineral formed by aluminosilicate at high temperatures. Mullite will be formed when aluminosilicate is artificially heated. Generally, mullite is Artificially synthesized, it has the characteristics of high melting point, creep resistance, low expansion coefficient, thermal shock resistance, and corrosion resistance. It is a high-quality refractory material, so it is widely...
Mullite insulation brick refers to a high-alumina refractory material with mullite as the main crystal phase. Mullite bricks have high refractoriness, which can reach above 1790°C. They are mainly used in the manufacture of high-temperature stoves, heaters, and industrial Insulation layers of kilns. It has excellent high-temperature resistance, high-temperature stability, and thermal conductivity at high temperatures, so it is often used in the core parts of high-temperature furnaces, such as furnaces, nozzles, high-temperature air, fuel conduits, etc. The advantages of mullite insulation bricks lie in their high-temperature stability, wear resistance, and corrosion resistance. It can still maintain its original structure and performance at high temperatures without deformation, cracking, or shrinkage, and it can also resist the erosion of various chemical substances. In addition, mullite insulation bricks also have low thermal conductivity, which can effectively reduce heat energy loss and improve the energy efficiency of the kiln. In practical applications, mullite insulation bricks are widely used in various high-temperature furnaces, glass manufacturing, steel smelting, chemical industry, and other fields. It can not only ensure the high efficiency and stability of the production process but also improve the quality and output of products. In addition, mullite insulation bricks are also widely used...
The basis for choosing refractory bricks mainly includes the following aspects: Thermal properties: Thermal properties are one of the important properties of refractory bricks, including thermal expansion coefficient, thermal conductivity, specific heat capacity, thermal shock resistance, etc. Different refractory bricks show different thermal properties at different temperatures, so it is necessary to choose the appropriate refractory brick according to the specific use conditions. Chemical stability: Refractory bricks need to withstand high temperatures and various chemical corrosion, so chemical stability is an important factor in choosing refractory bricks. Different chemical environments have different corrosive effects on refractory bricks. For example, alkaline environments have a greater corrosive effect on silicate ceramics, while acidic environments have a greater corrosive effect on silicon carbide. Therefore, it is necessary to select the appropriate refractory brick according to the specific use environment. Physical and mechanical properties: The physical and mechanical properties include the compressive strength, flexural strength, and wear resistance of refractory bricks. Different physical and mechanical properties directly affect the service life and use effect of refractory bricks, so it is necessary to choose refractory bricks with better physical and mechanical properties. Cost and use effect: The cost of refractory bricks is also one of...
Mullite castable is a refractory castable made of porous mullite aggregate as raw material, plus fine powder and additives. The critical particle size of mullite aggregate is 12mm; the long-term use temperature is 1350 degrees. The mullite castable has a high service temperature and can be used as a working lining in direct contact with the flame to achieve high temperature and energy saving. Among them, mullite is a very strong stone, which makes it an excellent castable. Due to its strength and robustness, mullite castables can be used in the construction of various structures such as high-rise buildings, bridges, roads, and embankments. It can also be used to make various building materials such as bricks, cement, and plasterboard. Secondly, mullite also has good fire resistance. These properties make it an excellent material for manufacturing goods in high-temperature environments, such as high-temperature furnaces and stoves. It can withstand high pressure and heavy pressure at high temperatures, making it an ideal material for making metals and glass. The corrosion resistance of mullite is also very high. This makes it an ideal material for use in the manufacture of chemical storage tanks and piping. It can withstand the erosion of various strong...
The lining of the intermediate frequency furnace is usually bundled with refractory materials of various particle sizes (commonly used refractory materials mainly include magnesium, quartz, aluminum, and composite materials). Cracking and spalling of intermediate frequency furnace linings are common problems, which can lead to premature failure of the furnace lining and shorten its service life. What is the reason for the falling off of the intermediate frequency furnace lining? The initial damage of the intermediate frequency lining is due to the corrosion of the front end caused by the dissolution of the refractory sintered layer in the slag, and the appearance of cracks caused by temperature cycles. Another factor that causes cracks to propagate throughout the liner is the stress created by heating to too high a temperature resulting in a difference in the coefficient of expansion between the “three bands”. The transverse cracks in the lining of the intermediate frequency furnace are due to the lack of degassing forks between the front and rear materials when the lining is knotted, resulting in delamination between the materials; secondly, the cooling speed of the backing of the upper mouth of the furnace is too fast. When the temperature difference with the...
The biomass boiler should choose the boiler lining according to the combustion materials. If it is biomass particles, the temperature in the furnace can reach about 1200 degrees, and coking will occur. The working conditions are very bad. High-quality refractory materials should be selected. If the material is logs, the impact is not significant. The selection of refractory materials for biomass boilers needs to consider the following aspects: High-temperature resistance performance: The working temperature of the biomass boiler is relatively high, so it is necessary to choose refractory materials that can withstand high temperatures, and generally require the ability to withstand high temperatures above 1000°C. Abrasion resistance: When a biomass boiler burns biomass, it may contain particulate matter, which will cause wear to the refractory material. Therefore, it is necessary to choose refractory materials with better wear resistance. Corrosion resistance: The gas produced by the combustion of biomass boilers may contain some corrosive chemicals, which will cause corrosion to refractory materials. Therefore, it is necessary to choose refractory materials with better corrosion resistance. Stability performance: choose a refractory material with better stability performance to ensure that its long-term use will not cause problems due to its own chemical changes. Cost...
Low creep and spalling resistance are two important performance indicators of refractory bricks, and their meanings are as follows: Low Creep: Creep refers to the continuous deformation of a material under stress for a long time at high temperatures. In high-temperature environments, refractory bricks are subject to thermal stress, and creep is the continuous deformation of the brick material under this stress. Low creep means that refractory bricks can maintain small deformation when used at high temperatures for a long time, reducing the adverse impact on the kiln structure. Anti-spalling (Anti-spalling): Anti-spalling refers to the ability of refractory bricks to resist spalling or cracking caused by thermal shock at high temperatures. Inside the kiln, due to high temperatures and thermal cycles, refractory bricks are subject to stress caused by thermal expansion and contraction and are prone to peeling or chipping. Refractory bricks with good peeling resistance can effectively resist this kind of peeling and chipping, and maintain the integrity and stability of the inner lining. Low creep and spalling resistance are important performance indicators of refractory bricks when they are used for a long time in high-temperature environments. Good refractory bricks should have low creep and good spalling resistance to...
Home Tel Email Inquiry
