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

Wear-resistant ceramic liner, also known as alumina liner, alumina wear-resistant liner, or alumina ceramic liner, the main component is aluminum oxide, namely aluminum oxide (Al2O3), which is a kind of corrosion-resistant surface of industrial equipment, Excellent non-metallic material with wear resistance, high-temperature resistance and impact resistance. The wear-resistant ceramic liner is a white rectangular parallelepiped. According to different shapes, it is divided into the adhesive liner, welded liner, trapezoidal pipe liner, and arc-shaped cyclone liner. 1. The bonding liner is a solid white cuboid, and the common specifications are 150*100, 150*50, 120*80, and other models. Fix the ceramics on the steel plate with glue during construction.   2. There is a round hole in the middle of the welding lining plate, which is fixed by sticking and welding. The iron cap is welded through the middle round hole and the steel plate, and then a porcelain cap is used to protect the welding point. Compared with the adhesive liner, the welded liner has stronger impact resistance and can withstand higher temperatures, which solves the limitation of the temperature influence of the glue.   3. The vertical section of the trapezoidal pipe liner is a trapezoid, and it is a ceramic liner used for small pipe diameter (diameter less than 600mm) pipes. Common specifications are 150*45/40*25, 150*50/47*20, 150*40/37*20 and other models. The trapezoidal liner is self-arching in the pipe into a circle. In addition to the adhesive force of the ceramic glue, there is also pressure between each other, so it is stronger.   4. The arc-shaped cyclone liner is a kind of arc-shaped liner customized according to different cyclone sizes. Each circle requires a set of molds, which is relatively expensive. The arc-shaped plate can completely fit the inner wall of the cyclone vertebral body and can play a very good abrasion resistance on the inner wall of the cyclone with considerable impact force and serious wear. Its thickness is generally 20mm or 25mm. The wear-resistant ceramic liner has the characteristics of wear resistance, corrosion resistance, high-temperature resistance, impact resistance, and convenient construction. It is used as materials for electric power, metallurgy, coal, petroleum, cement, chemical, machinery, and other industries (ash slag, coal powder, mineral concentrate) , Tailings, etc.) ideal material for the wear-resistant surface of conveying equipment.

Wear-resistant ceramic pipes are widely used in industrial enterprises such as electric power, steel, cement, metallurgy, coal, petroleum, chemical, ports, mining, and construction machinery. When transporting abrasive particles and powders, ordinary pipes wear very quickly, especially the outer arc of the elbow, which is subject to material impact and abrasion, and the service life is much lower than that of straight pipes. When transporting highly corrosive media in the pipeline, attention should also be paid to the selection of anti-wear materials for the pipeline to prevent the pipeline from being quickly damaged due to corrosion, leading to material leakage and affecting enterprise safety production. When high-temperature materials are transported in the pipeline, the use of high-temperature resistant steel pipes is expensive and has other problems. In the ash conveying pipe, the amount of ceramic wear-resistant elbows is increasing, and the price of ceramic wear-resistant elbows varies greatly. Many customers only choose lower-priced products without considering the quality.   The model specifications of wear-resistant ceramic pipe elbows mainly consist of the following parts: 1. The outer steel pipe of the wear-resistant ceramic pipe elbow is mainly composed of 10#, 20# steel, or stainless steel and other materials; 2. Make the corresponding length according to the customer's requirements, and determine whether the pipeline needs to be welded in sections according to the size of the diameter. Generally, it needs to be sectioned if it exceeds 3 meters; 3. The wall thickness of the steel pipe is generally 6-10, and the thickness of the inner ceramic layer is generally 5-30mm; 4. General wear-resistant ceramic pipe elbows are guaranteed to be connected with the same inner diameter, except for customer requirements to ensure the same outer diameter connection; 5. Other models and specifications are produced according to customer requirements.  

Wear-resistant ceramic pipes mainly play a role in the connection between equipment and equipment, transport materials from one equipment to another, and transport gas, liquid, or fluid with solid particles. The difference between wear-resistant ceramic pipes and ordinary pipes is that the ceramic wear-resistant pipes will be lined with corundum ceramics through techniques such as pasting, welding, or isostatic pressing inside the ordinary pipes, as the anti-wear layer of the pipes, and protect the outer steel pipes from materials. The direct wear and corrosion of the pipeline greatly extend the service life of the pipeline. The ceramic lining of the wear-resistant ceramic pipeline can choose alumina ceramics or silicon carbide wear-resistant ceramics. Compared with alumina wear-resistant ceramics, silicon carbide wear-resistant ceramics have better wear resistance, higher hardness, and longer service life. Long, and silicon carbide wear-resistant ceramic is a kind of high-temperature resistant ceramic, which can run effectively in high-temperature environments for a long time and is suitable for use in high-temperature environments. At present, alumina ceramics are widely used as the lining material for wear-resistant ceramic pipes. From the actual use effect, the wear-resistant ceramics of the same specification have an isostatic pressure integral ceramic pipe and a welded wear-resistant ceramic pipe in order of their service life. Ceramic pipes and paste-type wear-resistant ceramic pipes, although paste-type wear-resistant ceramic pipes have the third highest service life, are still more than ten times that of ordinary steel pipes, and the process is simple and the cost is low. Therefore, the paste-type wear-resistant ceramic pipes are still At present, the most widely used and most cost-effective wear-resistant pipeline.

Ceramic wear-resistant liner is a kind of wear-resistant liner formed by using corundum wear-resistant ceramics as the main material, which is combined with steel plate or rubber through pasting, welding, vulcanization and other methods. According to different materials or shapes, ceramic resistant There are many types of grinding liners.   Wear-resistant ceramic liners can be divided into the following categories according to the combination method: 1. Adhesive wear-resistant liners using adhesive wear-resistant ceramics as the main material are mainly combined with wear-resistant ceramic adhesives and steel plates. The cost-effectiveness is relatively high, the construction period is short, but it is not resistant to high temperatures and is suitable for lower temperatures under working conditions. Used in the environment; 2. The welded wear-resistant lining board using welded wear-resistant ceramics as the main material is mainly used to combine wear-resistant ceramics with steel plates through stud welding nails, which can withstand high temperatures of 300°C and is suitable for use in environments with more complex working conditions; 3. Dovetail type wear-resistant lining board using dovetail type wear-resistant ceramics as the main material. Use dovetail strips to install the ceramics on the steel plate, usually with a certain curvature on the surface, which can disperse the impact force of the material and can be at a temperature below 800°C. Normal use in medium, suitable for use in environments with very harsh working conditions;

With the rapid development of China's new energy and the strengthening of awareness of environmental protection, environmentally friendly and clean new energy has been favored by people, and the lithium battery industry will usher in a blowout development. The positive and negative materials of lithium batteries need to use pneumatic conveying pipes to convey material powder in the production process, and the wear of conveying pipes has become a prominent problem, If the wear problem is not solved effectively and timely, the production of lithium battery enterprises will be affected due to equipment failure, which will seriously affect the production efficiency and competitiveness of enterprises. Traditional pneumatic conveying pipelines generally use 304 stainless steel and are lined with glass. However, because the glass is not wear-resistant, it is easy to wear under the continuous erosion of the lithium battery raw material powder, especially the elbow, because the airflow changes the flow direction on the side of the bend. The outer side of the head wears very badly.   Aiming at the wear conditions of lithium battery raw material transportation pipelines, our company recommends the use of 95 wear-resistant ceramic pipes. This wear-resistant ceramic pipe is a wear-resistant ceramic composite steel pipe composed of three layers of steel, viscose, and ceramic, and the steel is made of 304 stainless steel. The tube and ceramic are bonded to the inner wall of the steel part with high-strength viscose, and cured by heating to form a firm anti-wear layer. This product is suitable for pneumatic conveying of powder, and it will not age or fall off for a long time in an environment below 150°C. Its life span is more than 4-5 times that of glass pipes.   The pneumatic conveying pipeline produced by the company is specially designed for the powder and slurry conveying system which is particularly severely worn. The outer shell is 304 stainless steel, and the inner lining is alumina ceramics with ultra-high hardness and excellent wear resistance, combined with ceramic wear resistance, Corrosion resistance and the advantages of high strength and toughness of stainless steel, integrated design, lightweight and easy installation. It is an excellent choice for the transportation of positive and negative materials in the lithium battery industry. It not only exerts the high-temperature wear and corrosion resistance of ceramics but also exerts the characteristics of high strength and high toughness of metal materials, integrated design, and easy replacement and install.

Many customers will ask us in the inquiry communication whether the wear-resistant ceramics will fall off when they are attached to the pipes. I now make the following analysis on this problem. We have conducted a systematic collection of the problems frequently mentioned by customers. The reasons for the porcelain drop are as follows: 1. The phenomenon of ceramic drop caused by high temperature; 2. Porcelain drop caused by improper construction of ceramic sheets; 3. Porcelain will drop out when the selected process is inconsistent with the mining industry. How to solve the problem of ceramic falling off due to high temperatures? The temperature of the ceramic patch tube is generally about 100℃, 200℃ has reached the highest value, some ceramic tubes have not reached the interim point of this temperature, the porcelain is lost, and the second is the glue problem, we will according to the operating temperature of the on-site equipment Match the glue of the corresponding temperature. When the temperature exceeds 200 degrees, the ceramic patch process may be replaced with high-temperature welding ceramic construction to solve this problem.   How to solve the problem if the ceramic sheet is not properly constructed and the ceramic is dropped? Many manufacturers order paste ceramics, which is prone to large-area loss of ceramics. Our company adopts the dislocation method of ceramics in construction, which can form a mechanical self-locking arch relay between the ceramics, and there will be no ceramic loss.   How to solve the problem of ceramics falling off due to the discrepancy between the construction process and the equipment site? According to the operating conditions of the equipment: the size of the conveying material particles, the operating speed, the temperature, etc., select the appropriate ceramic technology, including ceramic patch pipes, welding ceramics, dovetail ceramics, and the ceramic thickness can be selected from 5mm-7mm-10mm-15mm-20mm, etc.

Influence of raw material powder: The most important raw material of alumina wear-resistant ceramics is high-purity alumina powder. Its performance and content have a great influence on alumina wear-resistant ceramics. It is inevitable to introduce impurities during the preparation process of ceramic powder. The organic impurities will be burned off during the sintering process, and irregular pores will be formed during the densification process. Inorganic impurities may interact with the ceramic powder at high temperatures. React or remain in the matrix to form microcracks. These microstructure defects caused by impurities have a significant impact on the densification of alumina wear-resistant ceramics. The particle size of the raw material powder also has a great influence on the performance of the product. Only the raw material is fine enough, the final fired product may form a microcrystalline structure, which makes it have good wear resistance. Therefore, high-purity, fine-grained alumina is used. Powder is an important prerequisite for the preparation of alumina wear-resistant ceramics with excellent performance.   Influence of molding method: Production practice and a large number of studies show that alumina ceramics with low porosity and high density have excellent structural properties. High density means that the crystal grains in the ceramic body are tightly arranged, and it is not easy to form destructive breakthrough points when subjected to external loads or corrosive substances. To obtain a high-density ceramic body, the molding method is the key. The forming of alumina wear-resistant ceramics generally adopts methods such as dry pressing, isostatic pressing, and hot die casting. Different methods have different characteristics and have different effects on the sintering performance and microstructure of alumina ceramics. Generally, grouting or hot die-casting processes are mainly used for products with complex shapes, and dry products can be used for products with simple shapes. Compression molding. The influence of sintering: sintering is a key stage of ceramic preparation, and the sintering atmosphere has a great influence on the preparation of ceramic materials. Too high a sintering temperature or too long a holding time will promote crystal growth, so that the fine raw materials will develop into coarse grains at high temperatures, and the amount of liquid phase will increase. This will not only decrease the strength but also weaken the wear resistance. Of course, if the temperature is too low, the sintered body will not be dense, and the wear resistance of the product will not be good. The use of advanced electric kiln sintering can precisely control the heating, heat preservation, and cooling process of sintering, which plays an important role in improving the performance of wear-resistant ceramics. However, the sintering cost of electric kilns and the consumption of refractory materials are higher than that of gas kilns and coal kilns.   Sintering aid: A suitable sintering aid reduces the sintering temperature, improves the microstructure of the ceramic, improves the mechanical properties, and then improves the wear resistance of alumina wear-resistant ceramics.  

In the process of handling and installation, wear-resistant ceramic pipes should be handled with care to avoid serious collisions. In particular, avoid direct contact with or impact on end ceramics by metal equipment.   When the wear-resistant ceramic pipeline needs to be cut during installation, it can be cut with a silicon carbide grinding wheel or plasma cutting machine, and gas cutting is not allowed. When the wear-resistant ceramic pipeline is installed, the pipeline and the center line of the pipeline should be aligned to ensure that the two ends are connected accurately, and the amount of misalignment of the two ends should be controlled within 1.0mm.   When the flexible pipe socket is used to connect and install the pipeline, the length of the double-end insertion in the flexible pipe sleeve is adjusted symmetrically. Since the coefficient of thermal expansion of the wear-resistant ceramic pipe is 1/2 of that of the steel pipe, the expansion gap can be reduced by 3-5mm.   When using a flange connection, the flange end surface must be flush with the wear-resistant ceramic pipe end surface to ensure the reliability of the connection method.

The sand-making equipment and beneficiation equipment in the mining equipment industry wear very seriously during the production process, especially the sand-making machine, sand washing machine, vibrating screen, crusher, etc. in sand-making equipment, which collide with stones or other materials for long time during the production process, The equipment wears out very quickly. Given the working conditions of the mineral processing equipment, the importance of wear-resistant ceramic liner lining the mineral processing equipment is emphasized. The wear-resistant ceramic lining is a special corundum ceramic product made of alumina as the main component, rare metal oxide as the flux, and calcined at a high temperature of 1700 degrees. It has the advantages of high strength, excellent wear resistance, lightweight, and long service life. At the same time, the use of wear-resistant ceramic sheets is also quite common. It is used in many fields such as the chemical industry.   Alumina ceramic pipes lined with strong wear resistance can be used to resist the damage to the pipes caused by the erosion and abrasion of the mixed air flow. The high-temperature wear resistance and corrosion resistance of the alumina ceramics are fully utilized, and the high strength and high toughness of the metal are fully utilized. Advantages, integrated design, easy to replace and install.   Wear-resistant ceramic sheets can be used directly on the inner or outer walls of metal pipes. It is famous for its high-cost performance, high hardness, good wear resistance, high-temperature oxidation resistance, good corrosion resistance, powder erosion resistance, particle impact resistance, and high-temperature resistance. It is widely used in severely worn industries such as thermal power, steel, cement, smelting, mining, chemical industry, machinery, paper industry, aluminum industry, and lithium battery.

Wear-resistant ceramics are made of AL2O3 as the main raw material, rare metal oxides as the flux, artificially synthesized raw materials, formed and sintered by a precise control process, with excellent wear resistance, light weight, strong bonding, and good heat resistance. The wear-resistant ceramics mainly include zirconia wear-resistant ceramics, ZTA zirconia toughened alumina ceramics, and alumina wear-resistant ceramics (92%, 95%, 99%)    Ceramic patch specifications (partial) 10×10×1.5mm 10×10×3mm 10×10×5mm 10×10×7mm 10×10×10mm 17.5×17.5×5mm 17.5×17.5×7mm 17.5×17.5×10mm 17.5×17.5×12mm 17.5×17.5×15mm 24×24×15mm 24×24×20mm 25*25*20mm 50×50×20mm 50×25×20mm Cylindrical ceramics Φ16×20、Φ20×10、Φ23×25 Alumina ceramic tiles 150×100×15mm 150×100×20mm 150×100×25mm 150×100×30mm 100×100×15mm 100×100×25mm 100×100×20mm 150×50×12mm 150×50×10mm 100×50×12mm 150×50×15mm 150×50×20mm 150×50×25mm 120×80×15mm 120×80×20mm 90×60×10mm 100×60×10mm 100×60×12mm 100×50×20mm 100×80×20mm 150×100×20mm 150×100×25mm 150×100×50mm 200×200×10mm 200×200×20mm Dovetail Ceramics 60*40*20 40*80*27 40*80*22 75*25*25 72*25*25 130*25*25 Alumina wear-resistant ceramic models can be customized according to customer needs