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 > News
Steel fiber reinforced corundum and high-alumina refractory castables for rotary kiln mouths are prone to cracking and peeling after many years of use, that is, poor thermal shock resistance and low service life. It is well known that clay bricks are better than high-alumina bricks in thermal shock resistance and alkali resistance because of low aluminum content; high strength, good wear resistance, and poor shock resistance. In the castables for kiln mouths, the Al2O3 content is 50% to 70%, the strength is moderate (taking into account both wear resistance and suitable thermal shock resistance), and the drying and compressive strength (1100℃) are about 40MPa and 70MPa respectively. It should be pointed out that refractory castables are composed of aggregates, powders, binders, and admixtures (substances). The phase composition in the matrix is in a non-equilibrium state before use. When used under high temperatures, the components in the matrix will follow the phase equilibrium relationship to re-form a new phase equilibrium (that is, obtain excellent performance and in-situ reaction). Therefore, suitable component materials should be selected and the batch design should be optimized to achieve good sinterability, volume stability, corrosion resistance, and high-temperature mechanical properties. Selection of main materials The front kiln...
As a high-performance refractory material, chrome corundum bricks are mainly used in industrial fields that need to withstand high temperatures, high pressures, and corrosive environments. Their excellent fire resistance, flexural strength, high-temperature creep, high-temperature volume stability, and corrosion resistance make them a key component in many industrial furnaces. The following are the main areas of application of chrome corundum bricks: 1. Metallurgical industry Steel smelting: Chromium corundum bricks are widely used in rolling heating furnaces in the steel industry, especially in parts prone to wear such as slide rails, tapping channels, and grooves. Its high wear resistance and long life (up to 10 to 18 months) significantly reduce refractory materials’ consumption and maintenance costs and increase the furnace’s overall life and output value. Non-ferrous metal smelting: In the process of non-ferrous metal smelting, chrome corundum bricks are used as linings for copper smelting furnaces, zinc smelting electric furnaces, and other equipment due to their superior wear resistance and corrosion resistance, effectively resisting high-temperature melts and corrosion—the erosion of sexual atmosphere. 2. Petrochemical industry Chrome corundum bricks also have important applications in gasifi ers in the petrochemical industry. These gasification furnaces have been exposed to high temperatures (1350~1450℃), high pressures (3.1~8.53MPa),...
There are significant differences between alkali-resistant castables and high-aluminum castables in many aspects. These differences are mainly reflected in composition, performance, use, and structural characteristics. 1. Differences in ingredients Alkali-resistant castable: The main components are MgO, MgO-Al2O3, MgO-CaO, MgO-CaO-SiO2, etc. These ingredients give the alkali-resistant castable excellent alkaline corrosion resistance. High aluminum castable: The main component is Al2O3, and the high alumina content makes it perform well in high-temperature environments. 2. Performance characteristics Alkali-resistant castable: It has high strength, alkali resistance, and excellent corrosion resistance. It can withstand the erosion of various slag materials, such as slurry, molten slag, limestone, etc., without causing erosion. At the same time, alkali-resistant castables also have good alkali-resistant aggregate reaction properties, thermal shock stability, wear resistance, and air permeability. High-aluminum castables: famous for their excellent high-temperature resistance, thermal shock resistance, chemical erosion resistance, and load resistance. At high temperatures, high-aluminum castables will not expand, crack or soften, and can withstand changes such as alternating hot and cold, rapid heating, and rapid cooling. In addition, its structure is dense, able to withstand various loads and vibrations, and is not prone to problems such as cracks and collapse. 3. Different uses Alkali-resistant castables: widely used in...
When comparing the density of high alumina cement and aggregate, we need to clarify the physical properties of the two and their respective density ranges. 1. Density of high alumina cement The density of high alumina cement, also known as high alumina cement, is a basic physical parameter of cement materials. According to information from different sources, the density of high alumina cement is usually between 2.9~3.0g/cm³, which is similar to the density of common cement types such as Portland cement. High alumina cement is widely used in construction and industry due to its excellent fire resistance, corrosion resistance, and fast setting time. 2. Density of aggregate Aggregate, as an important component of concrete, has an important influence on the performance of concrete. The density of aggregate varies according to its type and characteristics. Generally speaking, aggregate can be divided into ordinary aggregate, light aggregate, and heavy aggregate. The density of ordinary aggregate is roughly 2500~2700kg/m³; the density of light aggregate is lower, usually between 0~1000kg/m³, such as ceramsite, expanded perlite, etc.; while the density of heavy aggregate is higher, which may reach 3500~4000kg/m³, such as iron ore, barite, etc. 3. Density comparison From the absolute value point of view,...
There are many reasons why corundum refractory castable is so expensive. Usually, its price is 2-3 times higher than that of ordinary high-alumina bricks. So what are the reasons for its high price? Today, the editor will give a brief introduction: 1. High cost of raw materials The raw material of corundum refractory castable is mainly corundum. Corundum is a high-purity, high-quality refractory mineral. Its mining and purification process is relatively complicated. Not only that, the alumina content in corundum bricks generally needs to reach more than 90%, which requires the purity of corundum to be high enough to meet this standard. At present, my country’s corundum storage resources are relatively small, and the mineral content in the ore is relatively low. At present, artificial corundum is still the main one used on the market, so the cost of corundum raw materials remains high. 2. Complex production process The production process of corundum refractory castables is relatively complex and generally has high requirements for the process. Only in this way can the standard of more than 90% content be met, and the proportion of corundum refractory castables also needs to be very precise, so producers need to invest a lot...
In the process of building kilns in the high-temperature industrial field, to meet the needs of various complex industrial kiln lining structures, special-shaped refractory bricks are very important. They can be selected according to the specific shape of the kiln lining, and are often used in the masonry of some special-shaped kilns such as round and arched ones. Common special-shaped refractory bricks 1. Arch foot bricks Arch foot bricks are a kind of trapezoidal refractory bricks, mainly used in the corners of the vaults of industrial furnaces, bearing high temperatures and structural stresses. They are widely used in the blast furnace vaults of steel plants to ensure the stability and sealing of the furnace roof structure. 2. Knife-shaped bricks Knife-shaped bricks are a kind of refractory bricks with a wide top and narrow bottom. They are shaped like a kitchen knife, so they are called knife-shaped bricks. They are mostly used in special-shaped furnace doors, observation holes, and other parts. Around the furnace door of the heat treatment furnace, knife-shaped bricks can effectively prevent heat leakage. 3. Anchor bricks Anchor bricks usually have anchor claws or holes, which can be firmly connected to the furnace shell or steel structure. They...
The use of refractory castables affects the quality of the entire project. If it is not used in a standardized manner, it is easy to cause problems in the project, thus affecting the commissioning and use. So how should the castables be used, and what should be paid attention to? 1. Preparation: Before construction, all construction tools and areas should be cleaned to avoid the performance degradation of refractory castables due to impurities. If necessary, the foundation or support should be repaired and reinforced first. 2. Mixing refractory castables: When mixing refractory castables, a forced mixer should be used for stirring. When adding water, clean water with clean water quality should be used. Sewage and water containing harmful impurities should not be used. The amount of water added should be strictly added according to the manufacturer’s requirements. When mixing, first pour the dry material and additives into the mixer, dry mix for 2-3 minutes, then add water until the material is evenly mixed before discharging, and the mixed refractory castable should be used within 30 minutes. 3. Pretreatment of pouring: Before pouring, butter or engine oil should be applied to the pouring surface of the casting mold to facilitate demoulding....
Refractory bricks are also called fire bricks. They are a kind of shaped refractory material that is indispensable in high-temperature environments. They have the characteristics of high-temperature resistance, creep resistance, earthquake resistance, and corrosion resistance. They can resist high-temperature erosion and medium corrosion, so they are often used for the lining of high-temperature equipment and furnaces, such as aluminum melting furnaces, blast furnaces, trolley furnaces, glass kilns, etc. They are widely used in metallurgy, construction, chemical industry, power, and other industries. The reason why refractory bricks are also called fire bricks is because they have very high refractoriness. The refractory temperature of some common refractory bricks can reach 1790℃, and the refractory temperature of some high-quality refractory bricks can even reach about 2000℃, such magnesium bricks and corundum bricks. It is precisely because of its excellent refractory temperature that it is widely used in high-temperature industries to ensure the stability of the working environment of smelting furnaces in high-temperature industries and to provide stable assistance for the development of high-temperature industries. At the same time, its development is also the key to restricting the development of high-temperature industries. The higher the refractory temperature, the higher the melting point of high-temperature...
Phosphate refractory bricks are a type of refractory material, mainly composed of phosphate compounds and high-temperature resistant materials. They are widely used in some high-temperature and acid-base corrosive occasions. At present, phosphate refractory bricks mainly include phosphate-bonded high-alumina bricks and phosphate-bonded high-alumina wear-resistant bricks. The phosphoric acid solution in the manufacturing process is about 42.5%-50%, and the alumina content of phosphate refractory bricks is generally 75%-77%. It has excellent high-temperature resistance and corrosion resistance. The refractory temperature of phosphate refractory bricks can generally reach 1250℃-1350℃, which can withstand the high-temperature environment in the kiln. At the same time, it also has very good corrosion resistance, so it is often used in some environments with corrosive media to ensure the stability and service life of the kiln. Not only that, phosphate-bonded high-alumina refractory bricks show good thermal shock resistance. This means that they can withstand rapid temperature changes without cracking or peeling. This feature is essential for applications with frequent thermal cycles (such as furnaces or kilns). Not only that, it also has good wear resistance and can withstand abrasive forces and mechanical wear, which makes it very suitable for applications where bricks face high wear. Since phosphate refractory bricks improve...
T38 refractory brick is a common refractory brick size, which is often mentioned by people. It is also called knife-shaped brick or big knife brick. T38 represents the size of refractory brick, which is 230*114*65/55 (mm). This brick is thick on the top and thin on the bottom like T20 refractory brick. It looks like a knife from the side, so it is called a knife-shaped brick. It is often used for the masonry of the arched part of the kiln. The reason why T38 refractory brick is designed to be thick on the top and thin on the bottom is mainly to meet the needs of arc-shaped kiln masonry. This can meet the diversity of kiln shapes. After masonry, the refractory bricks can be more closely laid, making the kiln more closed and effectively resisting high-temperature erosion and pressure. It is usually used in combination with T20 refractory bricks to make the masonry of arc-shaped or circular kiln parts more convenient. At present, the materials of T38 refractory bricks mainly include high alumina, clay, magnesium, silicon carbide, corundum, and other materials. Reasonable selection should be made according to the actual situation of the kiln, such as the operating temperature...
Home Tel Email Inquiry
