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

The radius of the ceramic wear-resistant elbow, also known as the bending radius R, refers to the radius of the circle. The larger the radius, the larger the circle and radian, and the more similar to a straight line. Therefore, the larger the radius of curvature, the smaller the resistance of conveying materials, and the smaller the radius, the greater the resistance.    The size of the radius of curvature is generally determined in multiples of the pipe diameter. Such as DN100, the radius of curvature is R10D, then the radius of curvature of the elbow is R1000. 1. The radius of curvature of the elbow of the power plant boiler powder feeding pipeline should be determined according to the requirements of the drawings, generally six to ten times. The ash conveying pipeline is severely worn for a long time, and the radius of curvature should be as large as possible. If the radius is small, the service life will be reduced. 2. Generally, the radius of curvature of tailings slurry in mine transportation is 2D to 5D. 3. The curvature radius of ceramic wear-resistant elbows generally used in cement plants to transport pulverized coal is 10D to 15D. 4. The radius of curvature of the elbow of the chemical ash conveying pipeline is 10D.   If there is a space limitation on the installation part of the ceramic wear-resistant elbow, we recommend that the minimum be not lower than R3.5D, and make a thickened backpack on the back to increase the service life of the small-radius elbow.  

The origin of the Dragon Boat Festival: The Dragon Boat Festival is also known as the Duanyang Festival, Chongwu Festival, Dragon Boat Festival, Dragon Day Festival, Zhengyang Festival, Yulan Festival, and Tianzhong Festival. It is the first festival in China to be selected as an intangible cultural heritage in the world. It originated in ancient China and is dated every year. The fifth day of the fifth lunar month. The Dragon Boat Festival was originally a festival to drive away the gods of plague and sacrifice to dragons in summer. There are folk customs such as "stealing the dragon boat", "eating zongzi", "putting paper kites", and "hanging wormwood and calamus". There are at least four or five theories about the origin of the Dragon Boat Festival. So far, the most influential point of view on the origin of the Dragon Boat Festival is to commemorate Qu Yuan. Legend has it that after Qu Yuan threw himself into the river, the local people injured him and died, so they tried their best to rescue him by boat, because of the custom of racing; it is also said that people often put food into the water to sacrifice Qu Yuan, but most of them were eaten by dragons, and only neem was used because of Qu Yuan's prompting. Rice is wrapped in leaves and wrapped with colored silk to make the later dumplings. In order to commemorate this day, people set it as the Dragon Boat Festival. The Dragon Boat Festival, the Spring Festival, the Qingming Festival, and the Mid-Autumn Festival are also known as the four traditional Chinese festivals.   The customs of the Dragon Boat Festival The Dragon Boat Festival customs mainly include shoveling the dragon boat, offering sacrifices to dragons, picking herbs, hanging wormwood and calamus, worshiping gods and ancestors, washing herbal water, playing water at noon, immersing in dragon boat water, eating rice dumplings, putting paper kites, watching dragon boats, tying five-color silk threads, and smoking Atractylodes, sachets, etc. Dragon boat racing is very popular in the coastal areas of southern China. After it was spread abroad, it was deeply loved by people from all over the world and formed an international competition. The custom of eating rice dumplings on the Dragon Boat Festival has been prevalent in all parts of China since ancient times and has become one of the most influential and wide-ranging folk eating customs of the Chinese nation. During the Dragon Boat Festival, traditional folk activities are performed, which can not only enrich the spiritual and cultural life of the masses but also inherit and carry forward traditional culture well. The Dragon Boat Festival has a wide influence in the world, and some countries and regions in the world also have activities to celebrate the Dragon Boat Festival. 1. Dragon Boat Race (Dragon Boat Row): Dragon Boat Race (Dragon Boat Row) is a symbolic activity of the Dragon Boat Festival, and it is a competition for many people to paddle. Every year on the fifth day of May, dragon boat races are held all over the country to commemorate the patriotic poet Qu Yuan. After the dragon boat race was spread abroad, it was deeply liked by the people of every country and formed an international competition. 2. Eating zongzi: Eating zongzi is one of the important customs of the Dragon Boat Festival. At the end of April and the beginning of May every year, people start to soak glutinous rice, clean the zongzi leaves, and wrap the zongzi to commemorate the great patriotic poet Qu Yuan in our country. 2022 Dragon Boat Festival: The holiday will be from 6.3 to 6.5, a total of 3 days.  

There are many factors that affect the price of corundum wear-resistant ceramic elbows, as follows: 1. Different production processes: there are pipeline lining ceramic patches, integral ceramic rings, stud welding ceramics, dovetail ceramics and other processes. Different production processes have different prices. The manufacturer will recommend it according to the on-site working conditions provided by the customer. Appropriate materials and workmanship;    2. The price of raw materials is different: if the price of corundum wear-resistant ceramic elbows of the same material is different, it may also be that the price of raw materials is different.   3. The freight is different: the location of different manufacturers may also be different, the distance between the place of delivery and the place of receipt is also different, and the corresponding freight will be slightly higher or lower.  

Transparency is a key property of alumina ceramics, which is not only related to the basic chemical composition of the material but also depends on the microstructure of the material. Therefore, the transparency of alumina ceramics depends on factors such as porosity, grain size, grain boundary structure, and surface finish of the ceramics.   The preparation process of alumina ceramics is essentially a densification process that eliminates microscopic pores during the sintering process. The size, number, and type of pores in the material will have a significant impact on its transparency. In addition to porosity, the diameter of the pores also has a great influence on the transmittance of alumina ceramics. When the diameter of the pores is equivalent to the wavelength of the incident light, the transmittance is the lowest.   The grain size of the alumina ceramic polycrystal also has a great influence on the light transmittance. When the incident light wavelength is equivalent to the grain diameter, the light scattering effect is the largest and the light transmittance is the lowest. Because of this, to improve the light transmittance of alumina ceramics, the grain size should be controlled outside the wavelength range of incident light.   It is understood that the grain boundary is one of the important factors that destroy the optical uniformity of the alumina ceramic body, thereby causing light scattering and reducing the light transmittance of the material. Moreover, the greater the composition difference of the materials, the greater the difference in refractive index, and the lower the light transmittance of the entire alumina ceramic.   In addition, the transmittance of alumina ceramics is also affected by the surface roughness, which is not only related to the fineness of the raw materials, but also related to the machining finish of the ceramic surface. The surface of the untreated alumina ceramic after sintering has a large roughness, so the light incident on this surface will have diffuse reflection, resulting in light loss.  

The design process of impact-resistant and wear-resistant ceramics is to prevent the wear-resistant ceramics from cracking and falling off under the impact of bulk materials. The toughening formula is used, and a spherical structure is added to the shape design, which can disperse the force from the impact of materials. Combined with the fixing process of stud welding and wear-resistant ceramic AB glue, the wear-resistant ceramic can be tightly combined with the equipment to a large extent, and it is not easy to fall off.   The impact resistance of impact-resistant and wear-resistant ceramics is very good. The hardness of wear-resistant ceramics is very high. The toughening formula enhances toughness and spherical structure design, and triple protection greatly enhances the service life of impact-resistant and wear-resistant ceramics.   The fixing process of stud welding and wear-resistant ceramic AB glue can make the wear-resistant ceramic tightly fixed on the surface of the equipment, and it can be easily faced even when working in a relatively harsh working environment.   In addition to the above advantages, impact-resistant wear-resistant ceramics also have wear resistance, corrosion resistance, self-lubrication, and other characteristics of wear-resistant ceramics. It is the best choice for anti-wear in bulk material conveying systems.  

Wear-resistant ceramic pipes are widely used. According to the operating conditions of the equipment, the operating temperature, the size of the material particles, the height of the drop, and the pressure environment, the design of the pipe lining ceramics is also different, which is mainly reflected in the radius of curvature of the elbow and the length of the pipe. , the thickness of ceramics, etc., only a reasonable design can really play the role of wear-resistant ceramic pipes. The ceramic wear-resistant elbow used in the powder feeding pipeline of the power plant boiler, the curvature radius of the elbow is generally 6-10 times the bending degree. To effectively alleviate the wear degree of the pipeline, try to use the elbow with a larger design curvature radius. higher.   When the tailings slurry is transported in the mining industry, the radius of curvature of the wear-resistant elbow is generally between 2D and 5D, which can achieve better results.   When transporting pulverized coal pipelines in the cement and coal industry, the radius of curvature of the wear-resistant elbows used is generally between 10D and 15D, which can ensure that the transported powder can be transported smoothly, and the pipeline wear is relatively small.   Stainless steel integral ceramic lined elbows or straight pipes are mainly used in the lithium battery industry, suitable for pneumatic conveying of powders, and will not age or fall off under long-term operation in an environment below 150 °C. Its life is more than 4-5 times that of ordinary pipes.   Therefore, it is very necessary to design reasonable wear-resistant ceramic elbows for different working conditions. Try to give full play to the wear resistance of ceramics and improve the service life of the pipeline.  

Bulletproof ceramics have become a new star in the bulletproof industry. Its high strength, hardness, and lower density than metal make it a popular bulletproof material. Ceramic bulletproof sheets are also called ceramic bulletproof plates or ceramic bulletproof inserts. The main types are silicon carbide ceramics, boron nitride ceramics, and alumina ceramics. Today we will learn about alumina bulletproof ceramics.   Alumina ceramic bulletproof sheets are inserted in high-strength and high-modulus fiber composite panels. Its high specific stiffness, high specific strength, and chemical inertness in many environments make it almost impossible to plastic deformation. When the ceramic layer collides, the ceramic layer shatters or cracks and diffuses around the impact point to consume most of the energy of the projectile. Then the high-modulus fiber composite plate further consumes the remaining energy of the projectile, and the warhead will be due to its high strength. And hardness characteristics and passivation or even broken, to achieve the purpose of bulletproof.   From the perspective of material, principle, and target test, the application of alumina ceramic bulletproof sheet in armor system is very attractive, and it has become a protective armor widely used in body armor, vehicles, aircraft, and other equipment.

The two commonly used methods for installing ceramic linings in wear-resistant ceramic pipes are direct paste type and stud welding type, both of which can improve the service life of the pipe and protect the inner wall of the pipe steel from the impact wear and corrosion of the material. , but the two are different in cost, process, and use effect. Let's take a look at the advantages and disadvantages of pasted ceramic linings and welded ceramic linings in wear-resistant ceramic pipes.   The advantages of the paste-type wear-resistant ceramic lining are that the construction cost is relatively low, the process is relatively simple, and it can be installed in small pipes with a diameter of about 80mm. Even equipment with a slightly more complex internal structure can also install paste-type wear-resistant ceramics; The disadvantage of the paste-type wear-resistant ceramic lining is that the connection between the ceramic and the equipment mainly depends on the ceramic adhesive. The temperature exceeds 200°C, and the ceramic may fall off when the material is impacted. Therefore, the process of directly pasting the ceramic sheet is not suitable for application at high temperatures. and impacted areas.      The advantage of the welded wear-resistant ceramic lining is that it is fixed by a combination of stud welding studs and inorganic adhesives, which can run at a high temperature of 600 ° C for a long time. Because the fixing is more firm, it can be used in high-speed machines and other moving parts. The wear resistance and impact resistance are better when used in equipment or parts that are subjected to greater impact; the disadvantage of welded wear-resistant ceramic linings is that the construction cost is relatively high, the process is more complicated, the labor cost is higher, and welding is required. equipment, cannot be used in small pipes.   The adhesive type wear-resistant ceramic and the welding type wear-resistant ceramic lining have their advantages and disadvantages, which need to be selected according to the actual situation, but the wear-resistant ceramic adhesive used needs to be carefully selected, because the ceramic is difficult to combine with other materials, if the ceramic is bonded If the agent is not selected properly, the ceramic may fall off because the connection is not tight, resulting in bad influence.  

Ceramic-lined flexible hoses are very suitable for equipment with high mobility requirements, such as pump hoses and equipment that requires frequent replacement of conventional rubber hoses, expansion joints, or bellows connections to transport highly aggressive materials. Ceramic rubber hoses can also be used to isolate mechanical vibrations or connect non-fixed equipment.    The ceramic rubber hose has the following characteristics: 1、The ceramic lining of the ceramic rubber hose is 12 times more wear-resistant than stainless steel; The ceramic rubber hose is very impact-resistant - it is difficult to damage the ceramic sheet by the direct impact of the material; 2、Ceramic rubber hose is very flexible - its bend radius is approximately 12 times the inner diameter of a normal hose 3、Ceramic rubber hose is very corrosion resistant - compatible with most chemicals in slurries 4、The ceramic rubber hose has a variety of connection methods, and the installation is very convenient;   Ceramic rubber hose can support customization. To achieve a better use effect, it is recommended that the length of the ceramic rubber hose can reach more than 650mm, which can ensure better flexibility.  

In addition to the high wear and tear of the top discharge tank of the blast furnace in the steel mill, the coke and auxiliary materials falling from the top will also carry high temperatures and cause a strong impact. Most steel mills use manganese steel lining plates, which are seriously worn and need to be replaced frequently.    In addition, to wear resistance, the wear-resistant lining plate of the feeding tank also needs to have strong impact resistance and high-temperature resistance. The high temperature and impact-resistant ceramic lining plate of the blast furnace blanking tank of the steel mill can completely solve this problem.   A certain proportion of zirconia and other materials are added to the impact-resistant wear-resistant ceramic lining plate of the blast furnace blanking tank of the steel mill to increase the impact resistance of the ceramics. The unique spherical convex design can further buffer and reduce the impact force.   The main material of the wear-resistant ceramic liner is alumina, which is calcined at a high temperature of 1700 ° C and has excellent high-temperature resistance. In order to avoid the influence of high temperature on the ceramic adhesive, we use stud welding to fix, install the ceramic on the steel plate, and then install it on the equipment by welding or countersunk head bolts. The installation is simple and can be installed at 250 ° C Long-term operation at high temperature ensures that the ceramic does not fall off.