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First of all, we need to understand what is a refractory material. Refractory materials generally refer to inorganic non-metallic materials with refractoriness above 1580°C. It includes natural ores and various products made through certain processes according to certain purposes. It has certain high-temperature mechanical properties and good volume stability and is a necessary material for various high-temperature equipment. It is very versatile. So what are the types of refractory materials? In terms of properties, refractory materials can be divided into acidic refractory materials, basic refractory materials, aluminum silicate refractory materials, cast refractory materials, neutral refractory materials, special refractory materials, and amorphous refractory materials. Today we will not give a detailed explanation of these refractory materials one by one. In the following encyclopedia knowledge, I will introduce them slowly. After understanding the classification of refractory materials, we are talking about the properties of refractory materials. It’s actually very simple, and I’ll give you a simple explanation. 1. Physical properties: including structural properties, thermal properties, mechanical properties, serviceability, and operational performance. The structural properties of refractory materials include porosity, bulk density, water absorption, air permeability, and pore size distribution. 2. Thermal properties: including thermal conductivity, thermal expansion coefficient, specific heat, heat capacity,...
Chrome corundum refractory bricks, also known as high wear-resistant chrome corundum tapping channel bricks, are high-end products that Xinhongji Refractory has introduced to the market for many years. It is made of pure alumina Al2O3 and chromium oxide Cr2O3 as the main raw materials. Compared with pure corundum bricks, it has more functions, such as fire resistance, load softening deformation temperature, flexural strength, high-temperature creep, high-temperature volume stability, and corrosion resistance. It is mainly used for slide rails, tapping channels, and bevels of steel rolling heating furnaces, which are easy to wear in industrial furnaces. Chrome corundum brick is a refractory material used in many rolling mills with a service life of 10 to 18 months. Application of chrome corundum brick 1. When used in the steel industry, the service life of chrome corundum bricks is more than twice that of corundum materials, such as breathable ladle bricks. ; The wear resistance and corrosion resistance of chrome corundum bricks used in the nonferrous metal smelting industry are obviously better than other bricks. 2. For the carbon black industry, the service life of chrome corundum bricks used by Guangdong Maoming Carbon Black Factory is twice that of corundum bricks used under...
Alkali-resistant refractory castable is a kind of refractory castable that can resist the erosion of metal oxides. It is mainly composed of refractory aggregate, binder aggregate, binder, and alkali-resistant agent. If it is divided by porosity If it is more than 45%, it is a light alkali-resistant refractory castable, and less than 45% is a heavy alkali-resistant refractory castable. Alkali-resistant refractory castable features: 1. Good high-temperature performance; 2. Strong alkali resistance and corrosion resistance; 3. Can resist the erosion of sodium salt melt; Alkali-resistant refractory castable scope of application: Alkali-resistant refractory castables are mainly used in industrial furnaces with alkali corrosion in industries such as iron and steel, nonferrous metals, glass, machinery, and petrochemical industries. Among them, heavy alkali-resistant refractory castables are mainly used in the kiln tail, kiln head, preheater, discharge port, tuyere, and other parts of the calcined alumina rotary kiln and cement rotary kiln. Lightweight alkali-resistant refractory castables are mainly used for the top cover of the preheater, cylinder body, and thermal insulation lining of the above-mentioned rotary kiln. The main components of refractory castables: 1. The chemical composition of light alkali-resistant refractory castables is generally: Al2O3 content of 30% to 55% and SiO2 content of 25%...
Refractory cement is a very common refractory castable, which is widely used in the construction of various high-temperature kilns. In the production and use of refractory cement, pouring construction is a crucial part. How to carry out good Construction, the construction team of refractory cement pouring manufacturers play a very important role. First of all, refractory cement must have rich experience and a professional technical construction team in the construction process. They are very familiar with the specificity and performance of refractory cement and can provide suitable solutions according to different construction environments and requirements. Whether it is a high-temperature furnace, chemical equipment, or building structure, they can formulate the best-pouring plan according to the specific situation. Secondly, the excellent construction team is equipped with professional construction equipment and tools, which can ensure the quality and efficiency of construction. At the same time, they also master advanced construction technology and operation methods, which can ensure the pouring quality and construction safety of refractory cement. During the construction process, the construction team also needs to communicate and confirm with the on-site personnel, which requires a construction team with strong professional capabilities. They will conduct detailed demand analysis and communication with customers...
There are many ways to build refractory bricks, such as the flat laying method, side laying method, and vertical laying method, and matching refractory mud is required for laying bricks. Refractory brick masonry method: 1. The refractory brick-flat laying method is mostly used for the furnace wall, and a few are used for the lower layer of the furnace bottom. In our country, the common flat masonry method is the brick wall “one along one top” masonry method. Ring bricks (such as blast furnace walls) are also laid flat. 2. Refractory bricks – side laying method The side laying method is mainly used for two parts: one is laying the bottom bricklayer, such as the bottom of the open hearth furnace and heating furnace; the other is the side vault, such as the tapping hole arch of the open hearth furnace. 3. Refractory brick-vertical masonry, also known as vertical masonry, is mainly used in two parts: one is the top layer of the furnace bottom, such as the bottom of the open hearth furnace and the bottom of the blast furnace; the other is the working layer of the furnace bottom, such as the bottom of the open hearth furnace....
With the continuous development and technological innovation in the global industrial field, refractory materials, as an important raw material, have also received extensive attention. Refractory materials play an extremely important role in various industrial fields. Under harsh working environments such as high temperature and chemical corrosion, they can maintain structural stability and have good mechanical strength and heat resistance. In the future, with the increasing demand for refractory materials in industrial production, the development prospects of refractory materials will become more and more broad. This article will analyze and expound the development trend and prospect of refractory materials. First, the development trend 1. Develop materials with more advanced refractories and higher performance In various industries, higher requirements are put forward for the performance and service life of refractory materials in extreme environments such as high temperature and chemical corrosion. Therefore, developing more advanced and higher performance refractories has become an important task for refractory manufacturers and researchers. For example, in response to the problem that existing refractory materials are prone to thermal shock brittle failure at high temperatures, new refractory materials have been developed to prevent thermal shock and brittle failure. In addition, scientists are developing new refractory materials to...
Can the new insulation brick with a density of 0.25 replace the clay insulation brick with a density of 0.6? The success of new insulation brick replacements depends on several factors, including the specific application involved, performance requirements, and technical specifications. Here are some factors to consider: Insulation performance: The new insulation brick with a density of 0.25 may have better performance in insulation performance than the clay insulation brick with a density of 0.6 because low-density materials usually have better insulation performance. However, it was crucial to ensure that the new insulation bricks would meet the required insulation requirements. Structural stability: Low-density materials may not be as structurally stable as high-density materials. In some cases, such as walls that support weight, lower-density materials may require additional support structures for stability. Load-bearing capacity: If the insulation is used to support the structure, it is necessary to ensure that the load-bearing capacity of the new insulation brick is sufficient for the expected load requirements. Durability: Clay insulation bricks with a density of 0.6 are generally durable enough to maintain performance under adverse environmental conditions. The durability of new insulation bricks is also a factor to consider. The convenience of construction: The...
Although high-alumina bricks and mullite bricks are mainly made of alumina, there are still differences between the two. High-alumina bricks are made of calcined bauxite, and mullite bricks are made of sintered or fused mullite. Not the same, please inquire about specific prices. High-alumina bricks are different according to the content of aluminum oxide (Al2O3). Currently, there are four grades commonly used: 55-60% (level III), 65-70% (level II), and 75% (level I) ), 80% (special). High-alumina products are a kind of neutral refractory material, which is made of bauxite or other materials with high alumina content and fired. It has high thermal stability, the refractory temperature is 1700°C, and the upper limit use temperature is 1300-1400°C. The production process of various grades of high alumina bricks is roughly the same as that of multi-clinker clay refractory bricks. The clinker calcined at high temperature is first coarsely crushed by a jaw crusher, then finely crushed, sieved into the required particle size, and then goes through the processes of batching, mixing, trapping, wet grinding, molding, drying, and firing. The production process of sintered mullite bricks is similar to that of high alumina refractory bricks. Synthetic mullite clinker is used as granular material,...
The aluminum content of high-alumina lightweight bricks is 50-52-56, and the density is 0.6/0.8/1.0g/cm3. According to the size and specifications, there are standard bricks and special-shaped bricks. The price is different. It is about a few yuan a piece. Please contact us for the specific price. The physical and chemical properties of lightweight high alumina bricks mainly depend on the basic components and are also closely related to the process. For general lightweight high alumina bricks, the main components are only listed. The content of Al2O3 and Fe2O3, in fact, CaO, MgO, TiO, K2O, Na2O, etc. are all molten components, which determine the content of the glass phase. The nature and quantity of the mullite crystal phase are ignored because most of its use temperatures are below 1400 °C. This product is a high-temperature insulation material. It is made from high alumina bauxite and clinker that combines raw meat with clay. At present, the foam method and burnout method are mostly used to obtain insulating brick aluminum bricks with high porosity, low bulk density, and low thermal conductivity. Its characteristic is that the lower the density, the better the thermal insulation performance. According to different products, lightweight high-alumina bricks can...
Masonry Requirements for Refractory Bricks in Rotary Kiln 1. The brick lining is reliably concentric with the barrel. 2. Grasp the construction quality of the brick lock area. 3. Minimize the amount of steel plate used. 4. Correctly handle the brick joints. 5. Brick joints should be horizontal and vertical. 6. It is strictly forbidden to use a hammer to lay bricks. Masonry method of rotary kiln 1. Ring reduction/and wrong/5 cut According to the different brick joints, the blasting method of cement rotary kiln refractory bricks is divided into two types: circular and staggered. It is better to build the cylinder with bricks and rings. The advantage of ring masonry is that it is easy to build and dismantle, but it is necessary to ensure that the brick type and the size of the brick joints meet the requirements. If the brick joints are too large, it is easy to cause dislocation and deformation of the kiln lining and even accidents such as drawing lots and falling bricks. If the brick joint is too small, the lining brick will be damaged in advance due to excessive thermal stress during use. The main disadvantages of the staggered masonry method are:...
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