Material of Acid-resistant Refractory Bricks

Acid-resistant refractory brick is a kind of refractory brick that can withstand acid and alkali. Its main component is silica, with a content of about 70%. It has the characteristics of acid and alkali resistance, oxidation resistance, and corrosion resistance, and is widely used in the chemical industry. In the fields of petroleum, and smelting electric lights, the emergence of acid-resistant refractory bricks is to solve some high-temperature kilns where some media are corrosive. Today, I will give you a brief introduction to the materials and characteristics of acid-resistant refractory bricks. Material of acid-resistant refractory bricks The main raw materials of acid-resistant refractory bricks are quartz, feldspar, and clay. They are corrosion-resistant materials made by high-temperature oxidation and decomposition. The main one is silica, which can form a large amount of mullite under high-temperature roasting. This is a substance with excellent acid resistance. Characteristics of acid-resistant refractory bricks 1. Strong acid resistance The silica content in acid-resistant refractory bricks accounts for about 70%. This substance can form a large amount of mullite in high-temperature environments. It has strong acid resistance and can withstand the erosion of acidic media. At the same time, its water absorption rate is very high. It...

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Use Temperature of Refractory Bricks

The use temperature of refractory bricks should be distinguished according to the material of the refractory bricks. For example, refractory bricks can be divided into five categories according to the different compositions of the refractory bricks: silicon-aluminum series refractory bricks, alkaline series refractory bricks, carbon-containing refractory bricks, Zirconium-containing refractory bricks and insulating refractory bricks have different temperatures depending on the raw materials. High-alumina refractory bricks are used in the high-temperature area of the kiln lining, and the use area is in the 1300-1400°C range. If the temperature exceeds 1400°C, anti-flaking high-alumina refractory bricks or corundum bricks must be used. The high-alumina refractory bricks used in the burner part should be mullite refractory bricks or corundum-mullite refractory bricks, with a service temperature of 1300 to 1600°C. That is, it is resistant to high temperatures, wear-resistant, corrosion-resistant, and flexible. If andalusite or cordierite is added to high alumina bricks, the service temperature of this special refractory brick is between 1350-1500°C. Ordinary clay refractory bricks have good thermal shock and are used for general kiln linings. The operating temperature is around 1250°C. If it is a low-gas clay brick, it can be used in glass kilns and some special kiln linings. The operating...

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Which Non-stick Aluminum Castable is Better?

Non-stick aluminum castable is a refractory castable used in the aluminum smelting industry. It is widely used in the aluminum melting and casting industry. Although the melting point of the aluminum solution is not high, the aluminum solution has high activity and can penetrate molten aluminum. Furnace lining can cause cracks and lining spalling in the aluminum melting furnace, as well as slag and nodules. To avoid such phenomena, non-stick aluminum castables specially used in the aluminum melting and casting industry have come out. Castables, so which non-stick aluminum castables are better? Xinhongji Refractory is a company engaged in the research, development, production, and sales of refractory materials. Since its establishment, the company has insisted on providing customers with high-quality, high-performance refractory materials products. The company has been committed to research and development to serve the refractory industry. Contributing to the development, the refractory materials produced by Xinhongji Refractory have been well received by customers. The non-stick aluminum castables of Xinhongji Refractory have the characteristics of high fire resistance, corrosion resistance, and non-stick aluminum. They can effectively avoid the above problems and can be used in the bottom of the aluminum melting furnace, the lower furnace wall, the slag removal...

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Introduction to High-Temperature Kiln Refractory Bricks

There are many types of industrial kilns, generally speaking, they are mainly divided into four types: hot blast furnaces, aluminum melting furnaces, cement kilns, glass kilns, ceramic kilns, coke ovens, fluidized bed incinerators, etc. During the construction process they all need refractory bricks, so what are the high-temperature kiln refractory bricks they use? Let me give you a brief introduction: 1. Refractory materials for glass tank kiln According to the working environment of the glass tank kiln, factors such as chemical erosion, mechanical erosion, temperature fluctuations, and high-temperature effects that cause kiln lining damage should be comprehensively considered. The selection of kiln materials mainly includes the following series: 1.1 Al2O3-SiO2 series: mainly includes clay bricks and silica bricks. 1.2 Al2O3-ZrO2-SiO2 series: mainly includes zircon bricks and fused zirconium corundum bricks. 1.3 ZrO2-SiO2 series; 1.4 MgO-Al2O3, MgO-Cr2O3, MgO-SiO2 series; 1.5 Insulation materials   2. Cement kiln refractory materials The refractory materials used in cement kilns are a variety of materials and should be used in combination. There are mainly the following categories: 2.1 Alkaline refractory materials; the main varieties of alkaline refractory materials are: magnesia chrome bricks, magnesia bricks, spinel bricks, dolomite bricks, etc. Magnesia chromium bricks are divided into ordinary...

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High Temperature Refractory Castable Manufacturer

High-temperature refractory castable is a kind of charge often used in high-temperature kilns. It can protect the structure of the kiln and improve the efficiency of the kiln. It is mainly used for the lining of high-temperature industrial kilns such as steel, non-ferrous metals, glass, ceramics, etc. As a manufacturer specializing in the production of high-temperature refractory castables, Xinhongji Refractory has been deeply involved in the industry for many years, and its products have won praise from many customers. High-temperature refractory castables should have been used for a long time, and the future development potential is huge, mainly because with the continuous development of the smelting industry, the performance of the kiln will be required to be further improved, which requires high-temperature refractory castables for casting kilns. The continuous development and progress of materials. At the same time, the country’s emphasis on energy conservation and emission reduction is also increasing. As an important material that can improve kiln efficiency, high-temperature refractory castables will have further increasing market demand. The production process and technology of high-temperature refractory materials are the key to ensuring product quality. Xinhongji Refractory has a professional R&D team and production team, and the company currently uses advanced...

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Characteristics and Applications of Silicon Carbide Castables

Silicon carbide castable is generally a high-grade refractory material with silicon carbide as the main raw material. It has the characteristics of high strength, high wear resistance, and high slag resistance. Its operating temperature can reach about 1700°C and is generally used in high-temperature applications. In addition to being used alone, silicon carbide castables are often made into shaped refractory materials such as silicon carbide bricks for easily worn parts of the kiln. Currently, silicon carbide castables and silicon carbide products are widely used in high-temperature kilns. Works well in high-temperature kilns. Characteristics of silicon carbide castables 1. High intensity: Silicon carbide has very high strength and can maintain very good stability even at temperatures around 1700°C. 2. High wear resistance: Silicon carbide has a very high hardness, with a Mohs hardness of 9.5, second only to diamond. Therefore, silicon carbide castables have very high wear resistance and can withstand continuous erosion in high-temperature kilns. 3. High slag resistance: Since silicon carbide has good acid and alkali resistance, it can effectively resist the erosion of slag and metal oxides. 4. High refractoriness: The refractory temperature of silicon carbide castables can reach about 1700°C, so it is often used in some...

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How to Choose High Aluminum Castables

There are many types of high-aluminum castables, including non-stick aluminum castables, corundum castables, high-aluminum refractory cement, etc., but only those with an alumina content of more than 74% are called high-aluminum castables. There are so many types of high-aluminum castables. How do we choose during use? Next, the editor will help you to understand. First of all, we must understand that high-aluminum castables, as a kind of unshaped refractory material, are often used in kiln projects with irregular shapes. Generally, when we choose high-aluminum castables, we should base them on the purpose of the kiln and the type of materials used. Select the location, refractory temperature, whether it is corrosive, thermal shock resistance, etc., and then use it by pouring. When selecting high-aluminum castables, we need to judge what the kiln is used for. We separate each part of the kiln according to the purpose of use because the temperatures generated by different parts of the kiln during the smelting process are also different. Generally speaking, the working temperature of high-aluminum castables is between 1300℃-1400℃. When it exceeds 1400℃, corundum castables must be selected. Then we will judge whether the smelted material is corrosive. If it is acidic or alkaline...

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How Much Does Lightweight Insulation Brick Cost?

With the increasing awareness of energy conservation and environmental protection, lightweight thermal insulation refractory bricks have been widely used in kiln design in high-temperature industries. They not only conform to the concept of environmental protection skills but also greatly improve work efficiency and reduce the production investment cost of enterprises. First of all, lightweight insulation bricks refer to refractory products with high porosity, small volume, and low thermal conductivity. Their main features are porous structure (porosity is generally 40%~85%) and high thermal insulation performance. In terms of construction, lightweight insulation bricks are light in weight, which greatly reduces the weight of the kiln. The construction is simple and convenient, reducing labor intensity and improving work efficiency. What is the price of lightweight insulation bricks? I believe it is a question that most people are more concerned about. Henan Sun Hung Kai Refractory Materials Co., Ltd., a manufacturer of lightweight insulation bricks, gave some responses to this question: Due to the wide variety of lightweight insulation bricks, traditional lightweight insulation bricks include lightweight diatomaceous earth insulation bricks and lightweight mullite bricks, alumina hollow ball bricks, high alumina concentrating bricks, lightweight clay bricks, etc. In terms of the price of insulation bricks,...

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The Difference between Mash Materials and Castable Materials in Construction Methods

1. The difference between mash materials and castable materials in construction methods Pouring materials refer to on-site construction, which is mainly formed by pouring, vibration, or tamping methods. Fixed models can also be prepared in advance and ready for use. The use is more convenient, as long as the proportion specifications during the construction process are paid attention to. When used on site, high-aluminum ramming materials are mainly rammed with pneumatic picks or machines, and the wind pressure is not less than 0.5MPa. When less materials are used, the materials can also be fed manually. Relatively speaking, the construction operation without castables is simple, and the ramming intensity needs to be controlled. 2. Differences in raw materials Pounded materials are mixed with aggregates, powders, binders, and additives and can be divided into graphite, clay, silicon carbide, and magnesium. Castables are made of refractory materials with fixed binders and additives. They have high fluidity and are divided into main components and additional components. Subdivisions can also be divided into refractory castables such as lightweight castables, high-aluminum castables, corundum castables, and steel fiber castables. Better and richer performance than pounded material. 3. Different applications under specific application conditions Although mash materials and...

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Industrial High-temperature Kiln Special-shaped Bricks

Industrial high-temperature kiln special-shaped bricks are a type of refractory bricks with special specifications in high-temperature kilns. The shapes of these refractory bricks are irregular and are usually customized according to the specific place and environment where the kiln is used. Not only that, the raw material ratio of special-shaped bricks for industrial high-temperature kilns is also based on the actual use occasion. Industrial high-temperature kilns special-shaped bricks, as special refractory bricks, play a very important role in the construction of high-temperature kilns. They are usually specially applied in certain parts. During the production process, the shape and specifications of the special-shaped bricks are also required. Make special molds. The quality of the mold directly affects the shape and size of the brick. Features of special-shaped bricks for industrial high-temperature kilns 1. Excellent high-temperature performance: Special-shaped bricks for industrial high-temperature kilns are made of materials with excellent high-temperature performance, which can maintain excellent performance at high temperatures and ensure the safe operation of industrial kilns. 2. Strong corrosion resistance: Since the materials in industrial kilns will corrode refractory bricks, the special-shaped bricks in industrial high-temperature kilns have strong corrosion resistance and can effectively protect the kiln. 3. High mechanical strength:...

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