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During the construction process, low cement castables must be constructed according to the requirements of the construction drawings. According to the technical requirements of the drawings, the furnace steel structure, baselines, holes, and other parts should be comprehensively and carefully inspected and accepted. Check the side wall insulation layer bricks and anchor bricks. The shape and size of the anchor bricks and hanging bricks should be inspected and accepted piece by piece. There should be no transverse cracks. The position of the bricks should meet the design requirements and keep the anchor hooks with the furnace shell. Or the furnace ceiling hanging beams are vertical. To prevent the side wall lightweight insulation bricks from absorbing water, a layer of asphalt should be painted on their surface. It is necessary to check whether the inner mold is firmly supported and cannot be moved. The surface should be wrapped with cloth; the template should also be firmly supported and the surface should be brushed with oil to facilitate demoulding. Check whether the mixer, vibrator, etc. are working normally; and whether the driving is normal. If a failure occurs, repair it in time or prepare other hanging equipment. You must ensure that pouring...
Aluminous Cement, also known as high alumina cement or calcined aluminate cement, is a special refractory cement made from ores (such as kaolin, bauxite, gangue, etc.) and calcined at high temperatures. The main component of aluminate cement is calcium aluminate (CA), which has a high aluminum oxide (Al2O3) content, usually between 40% and 70%. Aluminate cement has the following characteristics 1. Shorter initial and final setting times: Compared with ordinary Portland cement, aluminate cement sets faster and can reach a certain strength in a short time, which is beneficial to shorten the construction period. 2. Suprior high-temperature performance: Aluminate cement has high fire and heat resistance, and can maintain stability and mechanical properties in high-temperature environments. Therefore, it is often used in refractory materials and high-temperature equipment. 3. Chemical corrosion resistance: Aluminate cement has good acid resistance, alkali resistance, salt-resistance, and corrosion resistance, and is suitable for use in chemical, petroleum, and other industries where chemical corrosion may occur. 4. Thermal shock resistance: Since aluminate cement has a low thermal expansion coefficient, it can better resist thermal stress when temperature changes and has strong thermal shock resistance. 5. Anti-permeability: Aluminate cement has good anti-permeability, which can effectively prevent the penetration...
An aluminum melting furnace is a device used to heat and melt aluminum materials. It is usually used in casting metallurgy, manufacturing aluminum alloys, and other fields. 1. After starting the heating furnace of the aluminum melting furnace, adjust the heating parameters until they heating parameters are stable before normal heating production can be carried out. 2. Before starting the aluminum melting furnace, you must check whether the pushing and discharging devices, circulating water, and air pressure are normal, whether the limit switch, manual and automatic switch positions are in the required positions, check whether the materials on the workbench meet the requirements for forgings, and you must always pay attention to it. Cooling water, because cooling water is the lifeline of the induction furnace, the outlet water temperature must not exceed 60°C. 3. The aluminum melting furnace should be placed correctly during the charging process. All large pieces of aluminum need to be processed before being installed in the furnace, and attention needs to be paid to the method. The irregular side should be placed as upward as possible to avoid jamming the furnace lining. 4. When the aluminum melting furnace is first fired in the cold furnace, the...
Castable prefabricated parts generally refer to a special-shaped refractory workpiece that is cast in advance. Its main use is in some special parts or difficult-to-construct parts during the construction of high-temperature kilns. By placing these externally in the early stage the production of refractory materials with special shapes can not only reduce the difficulty of construction but also speed up the construction progress during the construction process and ensure the construction quality. Generally speaking, the shapes of prefabricated parts are all kinds of strange, and they are usually customized according to the actual conditions of use. Since they are cast through molds, they can be made into prefabricated parts of various sizes and shapes, which are more precise than machine pressing. Greater complexity, mass, and volume. 1. Raw materials for castable prefabricated parts The raw materials of castable prefabricated parts are generally proportioned according to the actual use conditions. Currently, common raw materials include high aluminum, clay, corundum, silicon carbide, and other raw materials. They are professionally prepared according to the actual use temperature and use environment. The proportions are then added, poured into the mold, air-dried, and finally calcined at high temperature to make the finished product. 2. Characteristics...
Industrial square aluminum melting furnace is a common aluminum melting equipment in the aluminum melting and casting industry. It can well meet the requirements of strict alloy composition, discontinuous production, large single furnace capacity, and other requirements in the green smelting industry, thereby reducing energy consumption. To ensure the stable operation of the aluminum melting furnace, the selection of refractory castables for each part in the initial construction is very important, so the square aluminum melting furnace How to choose the appropriate refractory castable for the furnace? Next, the editor will help you to understand. First of all, we need to understand the overall structure of the square aluminum melting furnace. Since the temperatures generated during the production process are different in different parts, different castables must be selected in different parts when selecting. The overall structure of the industrial square aluminum melting furnace includes: The furnace top, upper furnace wall, furnace door, furnace bottom and lower furnace wall, furnace door frame and surroundings, burner, and burner, its structure diagram is shown in the figure below: In the above structure, appropriate refractory castables must be selected according to different working conditions. The furnace top mainly includes the furnace top insulation...
Light alkali-resistant refractory castables are composed of lightweight alkali-resistant refractory materials as aggregates, different proportions of alkali-resistant refractory powders as matrix materials, and a certain proportion of binders. It has high strength, good volume stability, and resistance to the alkaline medium is highly corrosive. The lightweight alkali-resistant refractory castable can be used in the construction of flues and chimneys. It can not only resist the erosion of alkaline high-temperature flue gases but also reduce the weight of chimneys and flues. It can also be used in the construction of flues and chimneys. Alkali corrosion in industrial kilns in steel, non-ferrous metals, glass, machinery, petroleum, and other industries, such as the preheater top cover, cylinder, and kiln insulation lining of rotary kilns. The physical properties of lightweight alkali-resistant refractory castables are as follows: 110℃, 16 hours drying, bulk density 1.5~1.6g/cm3, flexural strength 3~6MPa, compressive strength 30~40MPa: bulk density 1.4~1.5℃, The temperature is 1100℃, after 3h, g/cm3, flexural strength 6.0~6.5MPa, compressive strength 40~45MPa, linear change after combustion -0.3%~0.5%: thermal conductivity is 0.4~0.5℃, temperature is 350 ℃W/(m·K). Construction requirements for lightweight alkali-resistant casting materials 1. Clean drinking water must be used. The pH value is between 6 and 8. Stirring water should be...
The chimney is an indispensable facility in industrial production. It undertakes the important task of discharging waste gas. It not only ensures the normal operation of the industry but also affects the safety of production operations. Therefore, the construction of the chimney is very important. In addition to being able can withstand high temperatures and resist flue gas erosion in harsh working environments. To meet such a working environment, it is very important to build chimney refractory bricks for chimneys. Chimney refractory brick is a brick that can withstand high temperatures. It not only needs to resist the high temperature of flue gas, but also needs to maintain stable physical and chemical properties at extremely high temperatures, and is not easy to be burned, corroded, or cracked. These advantages all make it outstanding in chimney construction, while ordinary bricks are difficult to meet such working conditions. Such high temperatures cannot be tolerated by traditional bricks. Thermal expansion and contraction will cause the bricks to crack and even cause the chimney to collapse. The composition of chimney refractory bricks is mainly made of alumina, silica, and other materials with high melting points. These materials are combined with binders, die-cast with high-pressure...
The price of castables has always been a topic that customers are more concerned about, and the prices online are all kinds of strange, which makes customers very confused. However, there are many types of castables, and each castable has different raw material ratios, different performance indicators, and raw materials. Cost and other factors are the main factors affecting the price of castables, so the price of castables fluctuates greatly. Castables can be divided into major categories such as corundum castables, non-stick aluminum castables, light acid-resistant castables, high-aluminum castables, silicon carbide castables, etc. There are dozens of major categories alone. There are many categories and models. Each castable has different uses, different proportions, and different performance indicators, so the price is difficult to determine. Generally speaking, the price range of castables ranges from 1,000 yuan to 15,000 yuan per ton. etc., so the specific price must be determined based on the specific needs and the fire resistance of the product before quoting. In the process of understanding the price of castables, we must first understand the main factors that affect castables, including raw material costs, transportation costs, performance indicators, construction environment, etc. The quotation staff will mainly based on your...
What we call standard refractory bricks generally refers to refractory bricks with a size of 230*114*65mm. Although the shape is fixed, there are actually many types of refractory bricks. The prices of different standard refractory bricks are also different because of their refractory properties. There are differences in temperature, use occasions, and raw materials, so when we understand the price of standard refractory bricks, we must make a judgment based on the use occasion and the physical and chemical indicators of the refractory bricks. There are actually many types of refractory bricks, but according to the ratio of raw materials, they mainly include aluminum-silicon series refractory bricks, silica refractory bricks, magnesia refractory bricks, corundum refractory bricks, silicon carbide refractory bricks, and mullite refractory bricks. , carbon bricks, zirconia refractory bricks, etc. Among them, the most common ones are high alumina bricks, and the price of high alumina bricks varies according to the alumina content. The price of common high alumina bricks is 2,800 yuan. / ton, the price of second-level high alumina bricks is 1,800 yuan/ton, the price of third-level high alumina bricks is 1,200 yuan/ton, and the price of high-aluminum two-piece pieces is 2 yuan/block. This is the price...
Although fireproof bricks and refractory bricks are both bricks, and their names are relatively similar, the difference between the two is quite big, and the occasions they are used are also different. What are the differences between fireproof bricks and refractory bricks? Today the editor will take you to understand the differences between the two. 1. Different usage scenarios The main usage scenario of fireproof bricks is in buildings. In buildings, they are generally used in fireproof zones. Fireproofing is carried out by building firewalls. It can prevent the spread of flames, buy valuable time for escape personnel and firefighters, and at the same time, it can block the Spread of flames, slowing down the spread of fire; The main use scenario of refractory bricks is in high-temperature industrial kilns. It needs to be in direct contact with the flame and needs to be in a high-temperature environment for a long time. Therefore, it has very good fire resistance and stability, which can ensure that high-temperature industrial kilns can work normally. 2. Different production processes The raw materials for the production of fireproof bricks are mainly non-combustible raw materials, such as mineral fibers, silicates, etc., which are then made through...
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