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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...
High-strength refractory castables are mainly used in high-temperature and easy-wear parts of thermal kilns. For example, the front kiln mouth of the cement pre-calciner kiln, the three-channel coal injection pipe; the refining lance, and the pouring or ramming parts of the lining of the metallurgical furnace such as RH and DH vacuum degassing devices, and can also be used as heat-resistant linings in petroleum catalytic devices. 1. Storage of high-strength refractory castables High-strength refractory castables must be stored in dry warehouses. 2. Brief description of the construction of high-strength refractory castables 2.1 Water: Clean water must be used, with a pH value between 6-8. Mixing water should be accurately weighed. 2.2 Mixing: It is recommended to use a forced mixer. All mixing tools must be cleaned and mixed until the ingredients are uniform. 2.3 Summary of construction of high-strength refractory castables: 2.3.1 The pouring surface of all molds used should be coated with a layer of engine oil. 2.3.2 All embedded metal parts should be coated with a layer of asphalt paint before pouring. 2.3.3 The high-strength refractory castable should be used within 30 minutes after mixing. It should be poured to the specified thickness at one time and vibrated...
Alkali-resistant castables are mainly used as refractory and alkali-resistant linings in certain parts of kilns exposed to alkali erosion. For example, the cement kiln preheater system, piping system, and the end of the dry rotary kiln barrel. It can also be used as various kiln linings without alkali attack. High-quality products can also be used in parts with high strength and wear resistance requirements. Storage of alkali-resistant castables: This product must be stored in a dry warehouse. A brief description of the construction of alkali-resistant castables 1. Water must be clean drinking water. The pH value is between 6 and 8. Mixing water should be accurately weighed. The water consumption is as follows: 7% to 8% of the total material amount for high-quality products and 9% to 10% for first-class products. 2. Mixing It is recommended to use a 200~375 forced mixer. All mixing tools must be clean. Mix until the ingredients are uniform. 3. Construction Overview 3.1 The pouring surface of all molds used should be coated with engine oil. 3.2 All embedded metal parts should be coated with a layer of green paint before pouring. 3.3 The castables should be used within 0.5 hours after mixing. When the...
The general regulations for the use and preparation of refractory mud are as follows: 1. The refractory degree and chemical composition of the refractory mud used for masonry refractory products should be compatible with the refractory degree and chemical composition of the refractory products used. The type, grade, and other performance indicators of refractory mud should be selected by design based on the temperature and operating conditions of the furnace. 2. Finished refractory mud should be used for masonry blast furnaces, and the maximum particle size of the mud should not exceed 30% of the joints of the masonry bricks. 3. Before masonry of the blast furnace, the consistency and amount of water added to the refractory mud should be determined through tests according to the type of masonry. At the same time, check whether the masonry performance of the refractory mud (mainly the bonding time) can meet the masonry requirements. The bonding time of refractory mud depends on the material and dimensions of the refractory product and should be 1 to 1.5 minutes. 4. The consistency of the refractory slurry should be suitable for the type of masonry. 5. The consistency of refractory mud should be determined by the...
Magnesia-carbon bricks are a new refractory material that emerged in the 1970s. It is a non-burning refractory material made of high-temperature sintered magnesia or fused magnesia and carbon materials and various carbon binders. Magnesia-carbon bricks That is to say, it maintains the advantages of carbonic refractory materials, and at the same time completely changes the inherent shortcomings of previous alkaline refractories that have poor spalling resistance and are easy to absorb slag. So far, magnesia-carbon bricks are still widely used in the steel and metallurgical industry. The application of magnesia-carbon bricks has improved various technical and economic indicators of converters and reduced the consumption of refractory materials. In addition, as a non-fired product, compared with traditional fired magnesia dolomite bricks, the fuel consumption of magnesia carbon bricks is saved by at least 80%. 1. Properties of magnesia carbon bricks Magnesia-carbon bricks are composed of magnesium oxide and carbon, both of which have high melting points, and the two components do not solidify each other. Therefore, magnesia-carbon bricks have high melting resistance. Magnesia-carbon bricks are a composite structure. The main part is made of magnesium oxide clinker, which has strong resistance to alkaline slag corrosion, and carbon, which has poor wettability...
The cause of damage to the hot blast furnace lining is that when the dust content and operating temperature are constant, the choice of clay bricks reflects the relatively low melting temperature of the product, which produces a thin glass layer on the surface of the bricks and penetrates deep into the interior through the capillary tube, with a larger Corrosion depth; the maximum static load at the bottom of the regenerator checker brick is up to 8kg/cm, and the static load at the bottom lining of the combustion chamber is up to 4~5kg/cm. The pressure the furnace roof arch foot bricks bear is 02~20kg/cm2. Under the load of mechanical equipment and continuous high temperature, the brickwork will produce shrinkage deformation and industrial cracks, endangering the service life of the hot blast furnace. The structural types of hot air stoves are different, and the damage to the lining is also different. The most easily damaged part of the internal combustion hot blast stove is the partition wall, while the external combustion hot blast stove is the vault and bridge between the two rooms. The root causes of damage mainly include the following three aspects: 1. The effect of thermal stress....
Refractory bricks are mainly divided into clay refractory bricks, dense clay refractory bricks, high alumina poly light bricks, mullite insulation bricks, high alumina bricks, dense high alumina bricks, silica bricks, magnesia bricks, alumina magnesium bricks, high strength sintered refractory bricks, etc. Various refractory bricks have different raw material ratios and different volume densities, so what are their volume densities? The volume density of several common refractory bricks at present: the volume density of clay refractory bricks is generally 0.3-1.5g/㎝³, the volume density of dense clay refractory bricks is generally 2.05~2.30g/㎝³, the volume density of low-pore clay bricks The density is generally 2.15-2.25g/㎝³. The volume density of high-alumina polylight bricks is generally 0.6-1.0g/㎝³. The volume density of mullite insulation bricks is generally 0.8-1g/㎝³. The volume density of dense high alumina bricks is generally 2.3-2.6g/㎝³, the volume density of dense high alumina bricks is 2.5-2.9g/㎝³, the volume density of silica bricks is generally 1.80-1.95g/㎝³, and the volume density of magnesite bricks is average. The volume density of alumina bricks is 2.60-2.70g/㎝³, the volume density of alumina bricks is 2.90-3.0g/㎝³, the volume density of high-strength sintered refractory bricks is 2.0-2.3g/㎝³, and the volume density of silicon carbide bricks is generally 2.3 -2.6g/㎝³, etc....
As everyone knows about high-aluminum refractory bricks, special-shaped high-alumina refractory bricks are high-aluminum refractory bricks with an irregular shape. Their shapes can be said to be different. Such special-shaped high-alumina refractory bricks generally need to be re-opened. Mold, and then make the high-alumina refractory bricks into the shape we want according to the shape of the mold, which can meet the different needs of different high-temperature industrial kilns and facilitate construction. New special-shaped high-alumina refractory bricks generally adopt advanced manufacturing technology and have a new improvement in the ratio of raw materials and manufacturing technology. The new special-shaped high-alumina refractory bricks have higher refractoriness and lower thermal expansion coefficient. As well as better corrosion resistance, it is currently accepted by many high-temperature industrial kiln companies and is slowly becoming popular in the market. New special-shaped high-alumina refractory bricks are widely used in industries such as steel, non-ferrous metals, glass, ceramics, etc. The applications in these industries are mainly concentrated in key parts with special shapes that require fire-resistant properties. Such special-shaped bricks In addition to meeting all the indicators of refractory bricks, refractory bricks are also very convenient in construction. They are equivalent to a prefabricated part, speeding up the...
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