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High alumina bricks and clay bricks are common refractory materials, and their quality can be judged from the following aspects. Clay bricks and high-alumina bricks have different aluminum content, and the color is different. The clay is red, the aluminum content is high, yellow, and the higher the aluminum, the whiter. 1. Appearance quality: Appearance quality is one of the important criteria for judging the quality of bricks. Generally speaking, the appearance of high alumina bricks is relatively flat and smooth, without obvious damage and cracks, and the color is uniform. The appearance of clay bricks may have some irregular surfaces, and the color will be slightly different, but there should not be too many defects such as damage and cracks. 2. Dimensional accuracy: Dimensional accuracy is another important indicator for judging the quality of bricks. High alumina bricks generally have high dimensional accuracy, and the differences in parallelism and verticality between bricks are small. Clay bricks may have some deviations in dimensional accuracy, which need to be screened or classified according to standards. 3. Sound detection: Gently tap the bricks with your hands to judge whether the sound is crisp or not. This is another way to judge the...
Foundry electric furnace is a kind of equipment that melts metal or alloy material and then casts it into shape. Its internal temperature is as high as hundreds to thousands of degrees Celsius, so it needs to be lined with high-temperature refractory materials. Common refractory materials for foundry electric furnaces include: High alumina brick: made of kaolin, alumina, and other raw materials, it has the characteristics of high strength, strong corrosion resistance, high-temperature resistance, etc., and is usually used for the lining of electric furnace walls, furnace roofs, furnace bottoms, and other parts. Silica bricks: made of silicon raw materials, have the characteristics of high refractoriness, good wear resistance, acid, and alkali corrosion resistance, etc., usually used for the lining of the furnace wall, furnace throat, and other parts of the electric furnace. Magnesia brick: It is made of raw materials such as light-burned magnesium powder and light-burned magnesia powder. It has the characteristics of high-temperature resistance, good thermal conductivity, and alkali resistance. It is usually used for the lining of the furnace body and throat of the electric furnace. Carbon brick: made of coke, graphite, and other raw materials, it has the characteristics of high-temperature resistance and good electrical...
Zirconia corundum brick is a high-temperature material mainly composed of zirconia (ZrO2) and alumina (Al2O3). The name of the zirconia corundum brick comes from the corundum (Al2O3) in its main components, zirconia (ZrO2) and alumina (Al2O3). Zirconium corundum brick is a white solid formed by melting alumina powder and zircon sand containing 65% zirconia and 34% silicon dioxide in an electric furnace and then pouring it into the model to cool. The composition of the eutectoid and the glass phase of the stone is a eutectoid of the corundum phase and the zirconite phase, and the glass phase is filled between their crystals. Zirconium corundum bricks have high compressive strength, high-temperature stability, and corrosion resistance, so they are widely used in high-temperature industries and scientific fields. It can withstand use under severe conditions such as high-temperature thermal shock, thermal stress, and chemical erosion. Common applications include high-temperature furnaces, melting furnaces, electrolytic cells, etc. The load-softening temperature of zirconium corundum bricks is around 1700°C. Zirconium corundum brick is a high-temperature material, mainly composed of zirconia and alumina, which has good high-temperature stability and corrosion resistance, so it is widely used in industrial and scientific fields under high-temperature environments. The load softening...
The thermal shock resistance of refractory materials plays a vital role in industrial production and experiments in high-temperature environments. This article introduces some effective measures that can help improve the thermal shock resistance of refractory materials to ensure the stability and reliability of materials in high-temperature and deformation environments. To improve the thermal shock resistance of refractory materials, the following measures can be taken: 1. Optimize formula design: through optimizing formula design, select appropriate materials and proportions to improve the high-temperature resistance and thermal shock resistance of materials. 2. Adding micro-strengthening agent: Adding micro-strengthening agents, such as fibers, particles, grains, etc., to the refractory material can increase the interface strength of the material, thereby improving the thermal shock resistance. 3. Increase the porosity of the material: Appropriately increasing the porosity of the material can improve the thermal expansion and energy absorption capacity of the material, thereby enhancing its thermal shock resistance. 4. Improve the thermal stability of the material: By improving the chemical composition and structure of the material, its thermal stability at high temperatures is improved, thereby improving its thermal shock resistance. 5. Adopt composite structure design: By adopting composite structure design, such as multi-layer composite structure, cross-layer structure,...
Rotary kiln is an important production equipment, mainly used in cement, steel, chemical, and other industries. For the selection of rotary kiln lining materials, both castables and refractory bricks can be used. Here is a comparison of the two materials: Casting Material Casting material refers to the material that is poured into the lining mold after mixing the materials. Its advantages include that it can meet the needs of various shapes, can reduce brick joints, has wear resistance and impact resistance, and is easy to use. However, the production of castables requires a high level of technology, and the consistency of material properties is difficult to ensure, so the production process needs to be carefully controlled to ensure the stability of material quality. In addition, castables have a relatively short service life and need to be replaced frequently. Refractory Brick Refractory brick is a material made of bricks fired at high temperatures. Its advantages include good high-temperature stability, high mechanical strength, strong corrosion resistance, etc., and can be used for a long time. However, the production and installation of refractory bricks require certain skills and experience, and the shape and size of the bricks are fixed, so correct measurement and...
Mechanical grate incinerator is a common solid waste treatment equipment, which achieves purification and environmental protection by burning waste and treating flue gas. The working principle of a mechanical grate incinerator can be summarized as the following steps: Waste feed: Waste is fed into the incinerator through the feed port. Mechanical grate: A mechanical grate is installed in the incinerator, and the waste is pushed into the furnace by a mechanical device. Ignition: The igniter ignites the waste in the furnace and the pilot fuel begins to burn. Air duct introduction: the heat generated by the combustion in the furnace is introduced into fresh air through the air duct in the furnace to enhance the combustion effect. Fly ash separation: After the waste is burned, a large amount of ash will be produced, and the fly ash will be separated by the fly ash separation device in the equipment. Flue gas purification: The flue gas contains a large number of harmful gases and particles, which need to be treated by the purification device in the equipment to reduce environmental pollution. Emission: The purified flue gas is discharged into the atmosphere to complete the waste treatment process. In general, the working...
Looking for a professional refractory castable manufacturer Comprehensive strength: Choose a refractory castable manufacturer with strong comprehensive strength, including production equipment, technical team, and quality control system. These factors directly affect the quality and stability of the product. Technology research and development capabilities: The research and development and innovation capabilities of refractory castables are important indicators for evaluating the level of manufacturers. An excellent manufacturer should have a strong R&D team and laboratory facilities, and be able to provide customized product solutions according to customer needs. Qualification certification: Refractory castable manufacturers should have relevant qualification certifications, such as ISO9001 quality management system certification, ISO14001 environmental management system certification, and OHSAS18001 occupational health and safety management system certification. These certifications can prove that the manufacturer has a certain level of management and product quality assurance capabilities. Inspect product quality and performance Composition and formula: The composition and formula of refractory castable directly determine its performance such as temperature resistance, wear resistance and chemical corrosion resistance. When choosing a manufacturer, you should pay attention to the ingredients and formula of its products, compare them with other manufacturers, and choose the product that is most suitable for your engineering needs. Technical parameters: Knowing...
As an important building material, refractory castable has the characteristics of high-temperature resistance, wear resistance, and chemical corrosion resistance, and is widely used in metallurgy, chemical industry, electric power and construction, and other fields. This article will introduce the definition, characteristics, and application of refractory castables in different fields. 1. Definition and characteristics of refractory castables Refractory castable is a building material with high-temperature durability prepared based on refractory materials through appropriate formulas and processes. Its main features include: High-temperature resistance: refractory castables can maintain stable physical and chemical properties in high-temperature environments, and are not easily affected by thermal expansion, melting, or burning. Wear resistance: Due to the high hardness and wear resistance of refractory castables, they can effectively resist mechanical wear and friction and prolong the service life of the equipment. Chemical corrosion resistance: Refractory castables are not easily corroded by acids, alkalis, salts, and other chemical substances, and can maintain stable performance in corrosive media. 2. Application fields of refractory castables Metallurgical industry: In metallurgical furnaces, converters, electric furnaces, and other high-temperature equipment, refractory castables are widely used as lining materials to protect equipment from high temperature and chemical substances. Chemical industry: Refractory castables are used in...
The fluidized furnace is a special industrial furnace. Its working principle is to mix materials and gas at high temperatures and form a gas-solid two-phase flow in the furnace, so as to achieve the technical purposes of drying, pyrolysis, and calcination. In order to ensure the normal operation of the fluidized furnace, various parts need to use different types of refractory materials. The following is an introduction to the refractory materials used in various parts of the fluidized furnace. Furnace: The furnace is the core part of the fluidized furnace, and the refractory materials used in it need to have the characteristics of high refractoriness, high corrosion resistance, and high mechanical strength. Commonly used refractory materials include high alumina, silicate, and silicon carbide. Among them, high-alumina refractories have the characteristics of high refractoriness, high mechanical strength, and high thermal stability, and are one of the commonly used furnace materials. Dispersion plate: The dispersion plate is an important part of the fluidized furnace, and the refractory material used in it needs to have good wear resistance and heat resistance. Commonly used refractory materials include high alumina and silicon carbide. Nozzle: The nozzle is the key part of gas injection and gas...
The characteristics of refractory bricks for hot blast stoves mainly include the following aspects: High-temperature resistance: the working temperature of the hot blast furnace is generally above 1000 ℃, and the refractory brick has excellent high-temperature stability and can be used stably for a long time in a high-temperature environment without problems such as falling off and cracking. Thermal shock resistance: During the working process of the hot blast furnace, the temperature changes rapidly, while the refractory brick has good thermal shock resistance and can withstand the stress caused by rapid temperature changes without cracking or cracking. Wear resistance: The working conditions of hot blast stoves are relatively harsh, and there are erosion and wear of particles, smoke, burning substances, etc., while refractory bricks have excellent wear resistance and can maintain stable surface hardness and strength for a long time. Chemical erosion resistance: There are acidic or alkaline gases, liquids, and other media in the hot blast stove. These media have a corrosive effect on refractory materials, while refractory bricks have excellent chemical erosion resistance and can be used stably for a long time under the erosion of these media. Construction convenience: refractory bricks are easy to construct, can be...
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