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...