The Difference between Refractory Castables and Refractory Cement

For customers who do not understand refractory castables and refractory cement, these two products are easily confused. This article will give you an in-depth understanding of the differences between these two products so that you can better understand them. 1. Refractory castables Refractory castable is a kind of unshaped refractory material. It is made of refractory aggregates, powders, binders, and admixtures through batching and mixing. Depending on the selected aggregates and binders, the castables produced and the functions are also different. There are many types of refractory castables, and the corresponding castables can be selected for lining according to the industrial furnace environment. Refractory castables are usually used as overall kiln lining products. During on-site construction, the castables and binders need to be pre-mixed, then add appropriate water, stir evenly, and then pour into the installed lining mold. The vibrator is vibrated into shape and can be put into use after curing, demoulding, and baking. 2. Refractory cement Refractory cement is a refractory material used as a binder and refractory powder when making refractory castables. It uses high-quality bauxite and lime as raw materials and is mixed into an appropriate amount of raw material in a certain proportion. After sintering,...

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What are Refractory Bricks

Refractory brick is a kind of brick with refractory properties. It can withstand high temperatures of about 1500-1900℃. In addition, some high-quality refractory bricks are also anti-corrosion. Its main materials are high alumina bauxite and quartz. Made of refractory raw materials such as clay, feldspar, etc., they are usually used in the construction of various high-temperature kilns such as industrial furnaces, high-temperature furnaces, smelting furnaces, etc. Today I will introduce the types, characteristics, and physical and chemical properties of refractory bricks. In the indicators and other parts, I will tell you in detail what refractory bricks are. There are many types of refractory bricks. According to different temperatures and uses, they can be divided into ordinary refractory bricks, high-grade refractory bricks, lightweight refractory bricks, special-shaped bricks, etc. At present, our common refractory bricks include high-alumina refractory bricks, corundum bricks, and carbonized refractory bricks. Silica bricks, andalusite bricks, clay bricks, silica bricks, etc. are usually selected according to the location and temperature used. Among them, high alumina refractory bricks are the most common type of refractory bricks in high-temperature kilns. What we need to pay attention to when purchasing refractory bricks should be the various performance indicators of refractory bricks, such...

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How to Choose Flue Refractory Bricks

The flue is a tubular device for emitting waste gas and smoke. It is an essential part of a high-temperature kiln. Since the temperature of a high-temperature kiln is relatively high, the temperature of the flue gas produced can reach thousands of degrees. To ensure that the flue is normal for the operation and service life of the flue, the flue refractory bricks used in the process of building the flue are very important. They must have good heat resistance and chemical resistance. The selection of flue refractory bricks is generally based on lightweight refractory bricks, which can withstand high temperatures and reduce the weight of the flue, thus ensuring the normal operation of the flue. Generally, lightweight refractory bricks are mainly divided into light-quality mullite refractory bricks, lightweight clay refractory bricks, and lightweight silica bricks should be selected according to the properties of the flue gas produced by the medium, such as the temperature of the flue gas, whether the flue gas is corrosive, etc., so that Only in this way can we choose the right refractory bricks correctly. When purchasing refractory bricks for flues, we need to consider several factors. The first is the type and specification of...

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High-temperature Refractory Clay Price

High-temperature refractory mortar is an indispensable adhesive in the construction of refractory bricks. It is also called a high-temperature binder. It can bond and build refractory bricks with each other and maintain good stability in high-temperature environments. Because of its properties, it is widely used in industrial kilns, thermal power plants, petrochemical enterprises, and other fields. Today, the editor will take you to know the price of high-temperature refractory clay to help you when purchasing high-temperature refractory clay. High-temperature refractory clay is currently mainly divided into aluminum silicate refractory clay, high-alumina refractory clay, and carbon refractory clay according to raw materials. Among them, aluminum silicate refractory clay occupies a place in the market with its lower price and good fire-resistant performance; High-aluminum refractory cement is favored because of its excellent high temperature resistance and wear resistance, although the price is relatively high; carbon refractory cement is used in some special occasions because of its superior thermal shock resistance. Today, the editor mainly talks about the price of high-aluminum refractory clay that is used more frequently. At present, the price of high-aluminum refractory clay is generally 2600-2800 yuan/ton. Its price will also be affected by many factors, including raw material costs,...

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Precautions for Construction of Low-Cement Castables

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...

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Precautions for Using Aluminum Melting Furnace

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...

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Raw Materials, Characteristics, and Construction Methods of Castable Prefabricated Parts

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...

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How to Choose Suitable Refractory Castables for Square Aluminum Melting Furnaces

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...

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Applications and Characteristics of Lightweight Alkali-resistant Refractory Castables

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...

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Chimney Refractory Bricks: Building Safe and Efficient Industrial Chimneys

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...

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