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Silica mullite bricks are widely used in some high-temperature industrial equipment. Due to its composition and preparation process, silica mullite bricks generally have the following characteristics and uses: High-temperature resistance: Silica mullite bricks can withstand high-temperature environments and maintain the stability and durability of the structure. It can provide good protection in high-temperature furnaces and furnace walls. Corrosion resistance: Silica mullite bricks have good corrosion resistance in the face of a chemical attack. It is resistant to acidic and alkaline substances and is suitable for environments requiring protection against corrosive gases and liquids. Anti-wear properties: Silica mullite bricks usually have good anti-wear properties, which can resist the erosion and wear of materials. This makes it widely used in industrial equipment that needs to be resistant to wear. The load-softening temperature of silica-mole bricks is above 1550°C, especially the compact structure of the product, which is composed of high-hardness minerals, corundum, silicon carbide, and mullite. It has particularly good wear resistance and is an ideal brick for the transition zone. The compressive strength and load softening temperature are significantly higher than the spalling-resistant high-alumina bricks. Its thermal shock stability, corrosion resistance, wear resistance, and low thermal conductivity are exactly what the...
To improve the operating life of waste incinerators, the following measures can be taken: Choose the right refractory material: Refractory materials used in waste incinerators need to have high-temperature resistance, corrosion resistance, and impact resistance. Choose high-quality refractory materials, such as high-alumina bricks, acid-resistant ceramics, etc., to ensure their stability and durability under high temperatures and corrosive environments. Optimizing the combustion process: A reasonable combustion process can reduce corrosion and thermal stress in the waste incinerator, thereby prolonging the service life of the furnace body. Reduce damage to refractories by optimizing combustion parameters, controlling combustion temperature and gas distribution, etc. Furnace protection measures: Use refractory materials such as ceramic bricks and refractory castables to protect the furnace wall in the garbage incinerator. In addition, metal covering or coating can be used to increase the anti-corrosion layer on the surface of the furnace body and improve the corrosion resistance of refractory materials. Regular maintenance and overhaul: Regular maintenance and overhaul of waste incinerators, including furnace body cleaning, refractory repair, replacement, etc. Timely deal with problems such as ash accumulation and slagging in the furnace to prevent erosion and damage to refractory materials. Control the chemical reaction in the furnace: For the...
Electric kiln is a device that uses electric energy as a heating source. Corundum brick is a high-performance refractory brick made of corundum and other refractory materials, which can be used for a long time at a high temperature of 1600 degrees. Electric kilns are often used in processes such as high-temperature sintering, melting, and heat treatment. Since the working temperature of electric kilns is usually high, reaching or even exceeding 2000 degrees Celsius, it is necessary to use refractory materials that can withstand high temperatures. Corundum bricks are widely used in the lining of electric kilns because of their excellent high-temperature performance. Corundum has a melting point of more than 1900 degrees and good high-temperature resistance and can maintain stability in high-temperature environments. Corundum brick not only has good refractory performance, but also has high thermal conductivity and excellent wear resistance, and can withstand high temperatures and chemical corrosion inside the electric kiln. Corundum bricks are commonly used in the inner wall of the furnace cavity, furnace bottom, and furnace roof in electric kilns. They effectively insulate the high temperature inside the cavity, provide even heat distribution and protect the structure of the cavity from damage. It should be...
The heating furnace is mainly composed of a regenerator that is insulated by refractory materials, a furnace body that supports and transports heating elements, a furnace body, and a heat recovery system. The heating furnace uses oil, natural gas, electricity, and coal as the main fuel as the heat source. Of course, the furnace temperature and pressure can also be controlled manually. The main function of the heating furnace is to heat the billet (billet, bloom, slab, ingot) to 1000-1250°C (rolling temperature) until it has enough plasticity to be rolled to the desired Section, size, or shape. Depending on the chemical composition and grade of the material, the required rolling temperature also changes. Depending on the metallurgical properties of the raw material and the productivity, the heating rate of the furnace is also adapted to meet specific requirements and goals. During furnace processing, a stream of material runs continuously through the furnace, heating the raw material to a certain temperature. The heating furnace is divided into continuous heating furnaces, push steel heating furnaces, regenerative heating furnaces, and roller bottom heating furnaces. Depending on the heating capacity, material grade, and material shape, choose the appropriate furnace type. Furnaces used for the...
Lightweight refractory materials are widely used in modern industrial production and construction industry because of their many advantages, such as low density, high-temperature resistance, corrosion resistance, heat insulation, etc. Different lightweight refractory materials have different properties and use. First of all, we need to know what lightweight refractories are. Lightweight refractory materials can be divided into two types: organic and inorganic. Organic materials mainly refer to materials made by adding lightweight aggregates based on organic adhesives. Inorganic materials are based on refractory materials and processed by adding foaming agents and other auxiliary materials. Inorganic lightweight refractories usually use materials such as fire clay or ceramsite as the basis, which can maintain stability at high temperatures. Next, we need to know the application range of lightweight refractories. Lightweight refractories can be widely used in petroleum, chemical, metallurgy, machinery, ceramics, glass, and other industries. In the construction industry, lightweight refractory materials are also used for thermal insulation and fire protection. For example, the use of lightweight refractory materials on top of buildings can protect buildings from fire. Among lightweight refractories, perlite bricks are a better choice. Perlite brick is a new type of lightweight refractory material, which is mixed with perlite, diatomaceous...
In the production process of titanium dioxide, multiple high-temperature equipment and reactors are involved, and some refractory materials are required to withstand high temperatures and chemical corrosion. Here are some refractory materials that may be used: Titanium dioxide calcination kiln: The calcination kiln is used to calcine the titanium dioxide precursor material at high temperatures to form the final product of titanium dioxide. Refractory materials are used in the lining, furnace wall, and combustion chamber of the kiln to resist high temperatures and chemical erosion. Reactor: In the process of titanium dioxide production, some reactors may be involved, such as chlorination reactor and titanium sulfate reactor. These reactors usually require the use of refractory materials to construct parts such as lining, reaction chamber, and outlet to withstand the corrosion caused by high temperature and chemical reactions. Filters and Dryers: In titanium dioxide production, filters and dryers may be required to handle and separate solid particles. The interior of these devices may require the use of refractory materials to withstand high temperatures and particulate attacks. Conveying pipelines and storage equipment: During the production process of titanium dioxide, pipelines, and storage equipment are needed to transport and store raw materials and finished...
The main reason why high-temperature industrial kilns need to use insulation materials is to reduce heat energy loss, improve energy utilization efficiency and protect equipment structure. The following are several important functions of insulation materials in high-temperature industrial furnaces: Reduced thermal energy loss: High-temperature industrial furnaces often need to operate at very high temperatures, while the surrounding environment may be room temperature or cooler. Insulation materials can effectively reduce the loss of heat energy to the surrounding environment through conduction, radiation, and convection, thereby reducing energy consumption. This reduces fuel consumption and running costs. Energy saving: By using ideal insulation materials, the high temperature inside the kiln can be better kept within the required process temperature range. The thermal resistance performance of the insulation material can reduce the loss of heat, so that the kiln can maintain a stable operating temperature with lower energy input, thereby improving energy utilization efficiency. Environmental protection: High-temperature industrial kilns usually produce a lot of waste heat and exhaust gas. Thermal pollution to the environment can be reduced by using thermal insulation materials to reduce thermal energy loss. In addition, the insulation material can also reduce the temperature of the outer surface of the kiln...
Lightweight acid-resistant castables are made of a water glass as a binder, acidic or semi-acidic refractory materials as aggregates and powders, and a small amount of coagulant. It has good physical and chemical properties and has a small volume density. , Add water to solidify quickly, and use high temperature, compressive strength increases with the increase of temperature and acidity, small thermal conductivity, small linear expansion coefficient, and so on. Lightweight heat-insulating and acid-resistant castable have good workability, convenient construction, and a moderate initial setting, and final setting time, the strength continues to increase after high-temperature baking, and it is impermeable and acid-resistant. Lightweight heat-insulating and acid-resistant castable have good physical and chemical properties, so it is widely used, mainly used as anti-corrosion flue and chimney lining, acid storage tank, pickling tank lining, nitric acid concentration tower lining, acid recovery Furnace lining and other container linings corroded by acidic high-temperature gas, etc. Precautions for construction of light acid-resistant castable 1. Lightweight heat-insulating and acid-resistant castables cannot be used in a short period of time and in a working environment with large temperature differences. 2. The construction environment of lightweight heat-insulating and acid-resistant castables needs to be kept dry, and its...
The refractory material of the gasifier can be divided into three parts: cone bottom, cylinder and vault. There is a certain expansion space between the vault and the furnace shell, so that the lining refractory bricks expand upward when the gasifier is running. It can be divided into several levels from inside to outside. Taking the cylindrical refractory material as an example, it is divided into four layers: fireproof refractory material layer, backing layer, heat insulation layer and compressible layer (the vault is the same as the bottom of the cone), and there is an expansion of 3~5mm between the three layers gap. Expansion in a convenient radial direction is unrestricted. 1. Refractory brick veneer The working environment of refractory bricks is very harsh, and design units and users are very cautious about their structural design and material selection. Refractory surface layer: also known as hot face brick, is a high temperature resistant and corrosion resistant consumable layer. Typically, high chromium materials are required, which require high temperature chemical stability, high creep strength and thermal shock resistance. The thickness of the fire surface from the barrel to the CWS gasifier is about 230mm. Use 90 chrome aluminum zirconium bricks (high...
High alumina anchor bricks are refractory bricks used in heating furnaces. High alumina anchor bricks are also called hanging bricks. They are mainly used to connect and support structures of refractory bricks and ordinary fired bricks, for heating furnace roof walls, or other components. High-alumina anchor bricks use natural high-grade bauxite as the main refractory raw material, add soft or semi-soft clay as a binder to high-alumina clinker, start batching, mixing, molding, drying, and finally firing. Formed high alumina refractory bricks. Under normal circumstances, the alumina content of high-alumina anchor bricks is above 55%. High-alumina anchor bricks can be produced and processed according to customer needs. The load softening temperature of high-alumina anchor bricks can reach 1550°C, which can meet the requirements of heating furnace roof lining. performance requirements. Features of high alumina anchor bricks for heating furnace: 1. The volume is stable at high temperatures. 2. Good corrosion resistance. 3. High softening temperature under load. 4. Anti-peeling, high compressive strength. The high-alumina anchor brick is a special-shaped high-alumina refractory brick, including a column composed of a hanging end and an anchor body, and an interval separation groove is arranged on the surface of the anchor body along the length...
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