China Hunan Yibeinuo New Material Co., Ltd. Company News

Silicon carbide wear-resistant ceramic pipe is a kind of ceramic-lined steel pipe. The lining is made of high-temperature-resistant silicon carbide ceramics with stable organic chemical properties, high heat transfer coefficient, small linear expansion coefficient, good wear resistance, fire resistance, and heat preservation. , high-temperature impact resistance, small size, lightweight, high compressive strength, good environmental protection, and energy-saving effects, etc. Silicon carbide ceramic composite pipe makes full use of the characteristics of seamless steel pipe, such as high hardness, good flexibility, impact resistance, good electric welding performance, high strength of corundum porcelain, wear resistance, corrosion resistance, and good temperature resistance. It gets rid of the seamless steel pipe The characteristics of low strength, poor wear resistance, and poor flexibility of porcelain. Therefore, silicon carbide wear-resistant ceramic pipes have good comprehensive properties such as wear resistance, high-temperature resistance, corrosion resistance, mechanical impact resistance, high-temperature impact resistance, and good welding performance.   Silicon carbide ceramic pipe is a good wear-resistant and corrosion-resistant pipeline, such as transporting particulate raw materials and cutting and eroding substances. The wear-resistant elbow produced by the pipeline is produced by centrifugal separation produced by self-spreading high temperature. The melting point of corundum in ceramic steel pipe is 2045°C. Due to the processing technology, the corundum layer and the steel layer have unique structural characteristics and unique stress fields.   At room temperature, the porcelain layer is subjected to internal stress, and the steel layer is subjected to tensile stress. The two, in turn, become a stable whole. Only when the temperature rises above 400°C, because the expansion coefficients of the two are different, the new stress field caused by thermal deformation and the original stress field in the ceramic steel pipe offset each other, so that the two are in balance. When the temperature rises to 900°C, the silicon carbide wear-resistant elbow is put into cold water and soaked repeatedly, and the composite layer has no gaps or collapses, which mainly shows the high-temperature impact resistance that ordinary ceramics do not have.   Silicon carbide wear-resistant ceramic pipes are mainly used in logistics transportation systems in high-temperature environments. They have strong wear resistance and corrosion resistance. They are cost-effective pipes in high-temperature transportation systems.  

Metal pipes and ceramic pipes are two kinds of pipes that are more common in industrial production today. In addition to bearing the burden of material transportation, they also shoulder many responsibilities such as wear resistance, corrosion resistance, and safety protection. Then when ceramic pipes meet metal which one would you choose? Anti-wear: From the perspective of anti-wear, the most critical factor affecting wear resistance is the hardness of the material. Both metal and wear-resistant ceramics can increase the hardness by changing the formula and improving the process. However, the hardness and weldability of metal pipes conflict and restrict each other. When the hardness increases, the weldability will decrease significantly. If both are to be considered, the cost will rise linearly. In comparison, the hardness of ceramic pipes can reach HRA90 within the ordinary price range, the anti-wear ability is very strong, and the price-performance ratio is very high. Anti-corrosion: Anti-corrosion mainly refers to acid-base corrosion. Metal materials have active chemical properties and are easily corroded by acid-base reactions. Wear-resistant ceramics are calcined at a high temperature of 1700°C to convert alumina into α-alumina with very stable performance, which has excellent resistance to acid and alkali corrosion.   Safety performance: The so-called safety performance refers to the stability of the pipeline during use, that is, whether there will be problems such as material hanging or material leakage during material transportation, which mainly depends on the smoothness and connection of the pipeline. Firmness. The initial smoothness of metal pipes and ceramic pipes is relatively high, but the smoothness of metal pipes will decrease after wear, and wear-resistant ceramic pipes will become smoother as they are worn because of the addition of self-lubricating components. From the above three points, in general, in industrial applications, the performance of wear-resistant ceramic pipes with the same cost performance has obvious advantages, and in the emerging industry of lithium batteries, ceramic pipes can also isolate metal pollution, which the market has recognized—highly recognized.

Wear-resistant ceramic is a kind of wear-resistant pipeline lining material with ultra-high wear resistance, which is widely used in various fields. With the continuous development of industrial technology and increasing demand, the wear-resistant ceramics market has maintained a steady growth trend. This article collects relevant information such as historical conditions, development trends, and future prospects, and provides a reference for companies to understand the industry situation and formulate development strategies. Historical situation: Looking back, we find that the development of wear-resistant ceramic pipes began a long time ago. With the continuous development of science and technology and the development of industry, the requirements for pipeline materials are also getting higher and higher. Traditional materials such as wear-resistant steels are gradually showing some limitations in terms of wear resistance. Due to its high hardness and excellent wear resistance, wear-resistant ceramics have become a well-recognized new material and have begun to be applied in some special industries.   Development trend: As wear-resistant ceramics are better applied in some special industries, in order to fully understand the situation of the wear-resistant market, wear-resistant ceramic manufacturers have also analyzed different market segments and produced alumina ceramics, silicon carbide ceramics, etc., zirconia ceramics, titanium gold ceramics and other wear-resistant materials that meet the needs of various market segments and can be combined with steel plates, alloys, and rubber in a variety of ways, not only for pasting, welding but also for vulcanization and casting, centrifugal casting and other methods combined. These diversified products and targeted technologies have been recognized by most industrial enterprises, and wear-resistant ceramics have begun to further develop in industries such as steel, cement, thermal power, machinery, chemicals, and lithium batteries.   Prospects: Through the analysis of various market segments and continuous attempts, wear-resistant ceramic manufacturers have a better understanding of new market trends, determine the future development direction, formulate corresponding development strategies, and have achieved faster development. According to relevant reports, China currently occupies a relatively high position in the global alumina wear-resistant ceramics market, and its market share will reach an eye-catching percentage in 2022. It is estimated that in the next five years, the wear-resistant ceramics market in China will develop at a rapid rate.   Summary: In summary, the wear-resistant ceramics market is growing steadily and rapidly. Due to the development of industrial technology and demand, wear-resistant ceramics will be widely used in various fields. Through research on market size, development trends, market segmentation, and other aspects, companies in the industry can fully understand market conditions and formulate development strategies. This will lead to a better grasp of market dynamics, make informed decisions, and to achieve sustainable development.

Alumina wear-resistant ceramic linings include direct bonded flat plates, welded orifice plates, trapezoidal liners, special-shaped liners, curved liners, grooved liners, etc., widely used in mines, steel, thermal power, power generation, cement, ports Wear protection of other equipment.   The shape of the wear-resistant ceramic lining is different, and the construction plan is also different.   Direct-adhesive ceramic plate: In the early stage, the surface of the equipment needs to be polished and dusted. Apply the prepared ceramic glue on the liner, and then fix the wear-resistant ceramic liner on the steel part's surface as the equipment's wear-resistant layer. Welding orifice plate with iron wrist: first fix the iron wrist in the orifice plate, then select the ceramic lining plate on the surface of the steel part with ceramic glue, and then weld the iron wrist on the equipment surface by spot welding, which plays a double fixing role. It can work at a higher temperature for a long time. The direct-adhesive plate can work in an environment below 300 degrees for a long time, and the welded orifice plate is double fixed by the iron wrist and ceramic glue. It can work in an environment below 700 degrees for a long time.

What is a cermet-lined composite pipe?"Metal-ceramic-lined composite pipe" Many buyers feel a little strange when they see the name of this product. Why are there metal and ceramic? What exactly is a cermet-lined composite pipe?   The metal-ceramic-lined composite pipe is the ceramic pipe we are familiar with, because the outer steel pipe is made of metal (ordinary steel pipe or stainless steel pipe), and then lined with ceramics, so sometimes it is called a metal-ceramic-lined composite pipe. That is, take the material directly in the title name. Among them, there are also two types of lining ceramics. Although they are all alumina ceramics, the production process is different. One is a ceramic patch, and the other is self-propagating ceramics. The choice of lining ceramics is determined according to working conditions, conveying medium, expected service life, etc. Simply put, ceramic patches are more wear-resistant and have a longer service life, but are not resistant to corrosion and high temperature (due to glue), Self-propagating ceramics are not as wear-resistant as ceramic patches, but they are resistant to corrosion and high temperature.

According to different processes, ceramic lining plates can be divided into three types: adhesive ceramic lining plates, welded ceramic lining plates, and dovetail ceramic slot-type lining plates. Today, let's find out what kinds of wear-resistant ceramic lining plates can be classified according to different ceramic materials.   1. Ceramic rubber two in one composite lining plate, ceramic-rubber two-in-one composite lining plate adopts a cold vulcanization process, vulcanizing high-purity alumina wear-resistant ceramics on top of high-grade rubber with better material, forming impact resistance and wear resistance. The ceramic-rubber composite liner can be used in equipment with relatively high impact force, but because the rubber is not strong in high-temperature resistance, even if high-grade rubber with better material is used, try to ensure that the operating temperature is within 200 ℃.    2. Ceramic steel two-in-one composite lining plate, ceramic steel two-in-one composite lining plate is to install wear-resistant ceramics on various metal materials by sticking or welding + sticking, and then welding or bolting the ceramic steel two-in-one composite lining board. The one-in-one composite liner is installed in the equipment that needs anti-wear. Compared with installing the wear-resistant ceramic sheet directly in the equipment, the ceramic-steel two-in-one composite liner is more convenient to install and disassemble, and it is more convenient to replace. Serious parts can use ceramic steel two-in-one composite lining, which can be removed and replaced regularly. The construction is simple and fast, saving a lot of time and cost.   3. Steel-based cast ceramic liner, steel-based cast ceramic liner, also known as a fused ceramic liner, is different from the ceramic steel two-in-one composite liner in that the steel-based cast ceramic liner is an arrangement of wear-resistant ceramics in a certain way. Melted into steel, it not only retains the high wear resistance of ceramics but also retains the toughness of steel. Therefore, the wear resistance of steel-based cast ceramic linings is usually stronger than that of metal wear-resistant plates, and slightly lower than that of ceramic-steel two-in-one composites. Liner. However, because the toughness of steel is retained, the impact resistance and fracture resistance of steel-based cast ceramic linings are stronger than those of steel two-in-one composite linings, and the temperature resistance is higher than that of ceramic-rubber two-in-one composite linings. It is used in equipment with high impact in a high-temperature environment. http://www.ybnceramic.com/alumina-ceramic-liner/impact-resistant-linings.html  

Most ash conveying pipelines use pneumatic conveying, which has the characteristics of high airflow pressure, fast flow rate, and long conveying time. There are often hard particles in the conveyed materials, which seriously wear the ash conveying pipeline. Abrasion of the ash conveying pipeline will cause serious pulverized coal leakage, pollute the environment, and cause potential safety hazards and waste materials.    There are three common solutions: 1. Reducing the air pressure during ash conveying can reduce the material flow rate while saving energy, thereby reducing pipe wear. This method reduces the efficiency of ash conveying in the pipeline, and the effect is not ideal. 2. Make a backpack patch structure in the parts where the ash conveying pipeline has been worn or may be worn, and pour cement or wear-resistant materials into the backpack. The operation is simple and the cost is low, but it can only partially solve the problem and cannot fundamentally solve the problem. 3. Improve and optimize the wear resistance of the pipeline itself. The lining of the pneumatic conveying pipeline with alumina ceramics is an effective method to solve the wear of the ash conveying pipeline. Corundum is the main component of wear-resistant ceramics. Its hardness can reach above HRA88, and the wear resistance is far super metal. The service life is 7-10 times that of metal pipes.

The wear resistance of wear-resistant ceramic linings is widely recognized, and adhesive wear-resistant ceramic linings are widely used due to the advantages of easy installation, low cost, and saving maintenance time. However, in power plants and metallurgical plants, the temperature of equipment is generally high, and conventional wear-resistant ceramic adhesives are not resistant to high temperatures. Once operated under ultra-high temperature for a long time, the adhesive is easily aged and causes ceramics to fall off.    High temperature wear-resistant ceramic adhesive is AB double-group epoxy adhesive; white paste, can be cured at room temperature, heating and curing can obtain better bonding strength; long-term temperature resistance after curing 250 ° C, high-temperature resistance 280 ° C, aging resistance , Corrosion resistance, high strength, good toughness, strong adhesion, optimize the construction process and reduce construction costs. Commonly used for self-adhesion and mutual adhesion of metals, cement, ceramics and other materials, especially suitable for sticking wear-resistant ceramic sheets (linings) on the surface of equipment below 250°C. Such as the pasting of wear-resistant ceramic sheets at the outlet pipe of coal mills in thermal power plant, inner shell of powder discharger, dust removal system in steel plant, elbow of air duct, etc.

The wear resistance of the wear-resistant ceramic tube mainly depends on the wear resistance of the wear-resistant ceramic lining, and the wear resistance refers to the ability of the material to resist mechanical wear, which is mainly determined by the hardness, strength, and roughness of the material.   1. Hardness: The hardness of the material reflects the ability of the material to resist the material being pressed into the surface. The higher the hardness, the shallower the depth of the material intrusion, the smaller the volume of wear, and the higher the wear resistance. The alumina content of wear-resistant ceramics exceeds 92%, and the hardness reaches above HRA85, which is the basis for wear-resistant wear-resistant ceramic pipes.   2. Strength: With high strength, it can provide good support for resisting wear and give full play to the ability of anti-wear hard to resist wear, that is to say, strength and hardness complement each other. The flexural strength of wear-resistant ceramics reaches 300-450Mpa, and the compressive strength is as high as 1200-2500Mpa, which further strengthens the wear resistance of wear-resistant ceramic tubes.    3. Roughness: The smaller the roughness value, the higher the fatigue and wear resistance. The surface roughness of the ceramic has a certain relationship with the thickness of the powder particles under certain conditions. The wear-resistant ceramics have been ground and polished many times, and they are supported by high-quality fine powder. The smoothness is very high, which adds a third guarantee for the wear resistance of the wear-resistant ceramic tube.   4. High hardness, high strength, and smooth surface are the reasons for the wear resistance of wear-resistant ceramic tubes. On this basis, there are also integrated molding, staggered joints, etc. to reduce the erosion of wear-resistant ceramic tubes by gas and powder, so that The wear resistance of wear-resistant ceramic tubes has reached a new level.  

Wear-resistant ceramic pipes are different from ordinary steel pipes. The inner wall of wear-resistant ceramic pipes has wear-resistant ceramics as a wear-resistant layer, and wear-resistant ceramic adhesives are used to connect the wear-resistant layer and the steel wall. Steel pipes are different. Because welding will release a lot of heat in a short time and generate local high temperatures, the edge of ordinary steel pipe can usually be welded directly, but if the wear-resistant ceramic pipe is directly welded, the internal porcelain will be blackened, and part of it will be melted due to the high temperature released. Viscose causes the internal wear-resistant ceramic to peel off.    How to weld wear-resistant ceramic pipes? Under normal circumstances, before welding wear-resistant ceramic pipes, a welding space should be reserved when applying porcelain, and then normal welding is performed. After the welding is completed, wait for the pipes to cool down, and then clean up the welding slag and paste the remaining parts of the pipes.