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

The pulverizing, ash, dust removal, and coal conveying systems of coal-fired power plants are constantly affected by friction, corrosion, collision, impact and other factors of the medium during the operation of the equipment, and the system is prone to leakage, causing environmental pollution. For this reason, each power plant has adopted different leakage control methods accordingly; among them, wear-resistant ceramic liner is an ideal leakage control material, and its wear resistance, practicability and economy are superior to other wear-resistant materials.   The wear-resistant ceramic lining is made of Al2O3 as the main raw material, and then some metals are used as the oxide as the solvent, and is made of corundum ceramics after being calcined at a high temperature of more than 1,000 degrees, so the wear-resistant ceramic lining does not matter. It is very high in hardness and wear resistance. Under normal circumstances, it is no problem to use it for up to 10 years.   The installation of the wear-resistant ceramic lining plate is mostly by using strong adhesive to paste the wear-resistant ceramic on the surface of the mechanical spare parts. Provide protection.    Wear-resistant ceramic liners are industrial wear-resistant, impact-resistant and corrosion-resistant materials. Shock resistance and thermal expansion and contraction: the thermal expansion coefficient of viscose is between steel and ceramics, which can well adjust the extrusion of ceramics due to the inconsistent thermal expansion of ceramics and steel; at the same time, a variety of flexible fibers are added to the adhesive , to ensure that the ceramics will not fall off during long-term operation under the environment of vibration and frequent thermal expansion and contraction.   The wear-resistant ceramic lining plate can also be used as a wear-resistant material for the material conveying equipment of steel mills and power plants to flow through the surface of the pipeline. Its main function is to effectively resist the impact on the pipe wall and the corrosion of chemical substances when the material passes through. The thermal shock effect caused by the action and the passing of the material greatly reduces the wear and tear on the inside of the equipment components.  

A coal mill is a machine that crushes and grinds coal into pulverized coal. It is an important auxiliary equipment for pulverized coal furnaces. The coal grinding process is a process in which coal is broken and its surface area is constantly increasing, which is easy to wear. Coal pulverizers generally adopt ceramic chip wear-resistant protection. After a few years, the internal roller frame and hinge shaft, tripod, annular duct, and straight pipe, the inner wall of the separator, and the outlet powder pipe area of the coal pulverizer will be severely worn. , It is necessary to repair the severely worn and fallen parts of the wear-resistant ceramic sheet to ensure the safe and stable operation of the equipment.   Coal mill is a machine that crushes and grinds coal into pulverized coal. It is an important auxiliary equipment for pulverized coal furnace. The coal grinding process is a process in which coal is broken and its surface area is constantly increasing, which is easy to wear. Coal pulverizers generally adopt ceramic chip wear-resistant protection. After a few years, the internal roller frame and hinge shaft, tripod, annular duct and straight pipe, the inner wall of the separator, and the outlet powder pipe area of the coal pulverizer will be severely worn. , It is necessary to repair the severely worn and fallen parts of the wear-resistant ceramic sheet to ensure the safe and stable operation of the equipment.   Construction process of repairing ceramic sheet of coal mill: 1. The repairing construction process of the ceramic sheet of coal pulverizer: surface dust removal, mechanical rust removal → cleaning → coating ceramic sheet glue → pasting ceramic sheet → self-inspection and trimming.   2. Dust removal and rust removal on the surface of the coal mill: Use an angle grinder to clean up the floating dust and rust on the construction site, exposing the original steel body.   3. Manual mechanical polishing pretreatment: Use an angle grinder to clean and roughen it at a certain angle, and then clean the surface with alcohol to make it have a certain surface cleanliness and roughness, and the rust removal level is Sa2.   4. Cleaning of coal mill: clean the surface with cleaning agent after rust removal.   5. Apply wear-resistant ceramic viscose: mix ceramic sheet viscose and curing agent according to the ratio of 1/2, adjust the glue time in 2 minutes, so that the AB glue is evenly mixed, and then scrape coating on the construction site and the ceramic sheet, the adhesive Spread evenly, and there should be no leakage or air bubbles.   6. Paste the ceramic piece: repair the worn and uneven construction parts with a ceramic repair agent, and then paste the scraped ceramic pieces on the construction part in order and stagger, and tap it firmly with a rubber hammer. The welding seam is polished and smooth, the bonding is firm and smooth, and the gap between the ceramic sheets is not more than 0.5 mm.   7. Self-inspection and trimming: check after the paste is completed, the outer surface of the ceramic sheet is smooth and flat, without deep scratches and cracks, to ensure that the paste is flat and the surface is smooth, and the unqualified parts should be repaired in time.  

Wear-resistant ceramic adhesive, also called wear-resistant ceramic adhesive, refers to a high-performance adhesive specially used to paste wear-resistant ceramic sheets or linings to the surface of the equipment substrate to protect the equipment substrate from wear. Wear-resistant ceramic glue can stick the wear-resistant ceramic sheet tightly on the surface of damaged equipment such as metal, to extend the service life of these equipment, reduce the frequency of replacement, and save costs. Let's introduce to you today what are the special uses of wear-resistant ceramic glue.   1. Wear-resistant ceramic glue is used for sticking wear-resistant ceramic sheets on the top surface and the vertical surface of the equipment. With strong adhesion, ceramics will not fall off without other support measures during the construction process.   2. Wear-resistant ceramic glue is suitable for medium-speed coal mill cones, coarse powder separators, powder exhaust fans, pulverized coal pipelines, and other ash powder scouring equipment and steel, cement, coal, mining, and other industries that are subject to strong scouring of materials Or paste wear-resistant ceramic sheets on equipment that is eroded and worn.   3. It is difficult to achieve the connection between wear-resistant ceramics and metal parts of equipment through traditional connection methods such as welding. It is a practical test to use wear-resistant ceramic paste to bond to achieve the connection between wear-resistant ceramics and metal parts of equipment. A proven connection method. After development, this technology has now been extended to the power, metallurgy, mining, cement, and other industries and has been widely used and recognized. 4. The use of wear-resistant ceramic glue can bond the high-purity wear-resistant ceramic sheets very firmly to the surface of equipment that is severely washed by materials, prolong the service life of this equipment, and reduce the maintenance of such equipment, to reduce the replacement of new equipment and reduce The purpose of equipment operation and maintenance costs is to reduce production losses caused by downtime.   Instructions: 1. Substrate surface treatment: Grinding or sandblasting to remove dust, oil, and rust on the surface of the adherend, and finally clean it with a cleaning agent, and let it dry; 2. Glue preparation: mix the two components evenly in proportion; 3. Sizing coating: evenly apply the adjusted glue on the surface of the object to be adhered; 4. Adhesive layer curing: complete curing under the required conditions, and perform post-curing treatment.  

Since the birth of lithium electronic battery products in the early 1990s, it has been 30 years. In recent years, with the rapid expansion of my country's 3C market and new energy vehicle market, Chinese companies have risen rapidly and occupy the largest scale in the world. In 2016, China accounted for 15 of the world's TOP 20 lithium battery manufacturers. By 2019, CATL and BYD have ranked among the top in the world in terms of shipments. Around the upstream and downstream of lithium battery manufacturers, a large and complete industrial chain has already been formed in China.   As an important part of the lithium battery, the cost of the cathode material also accounts for about 50% of the overall battery, and its quality is closely related to the quality of the lithium battery. On the lithium battery cathode material production line, from raw material delivery, feeding, batching, mixing, sintering (including secondary or tertiary sintering) to final packaging, each link is connected by pipelines into a closed transportation system, so the amount of pipelines is relatively large. Big. In the early days, PU pipes, rubber pipes and stainless steel pipes were mostly used for conveying pipes.   In the past three years, the rapid development of the domestic new energy automobile industry has put forward higher requirements on the safety performance and energy density of battery materials, and the high nickel ternary has become the mainstream. Compared with traditional cathode materials such as lithium iron phosphate, high-nickel ternary materials have higher hardness and higher requirements on the wear resistance of transportation pipelines. At the same time, they are also more stringent in demagnetization (forbidden copper, iron and zinc). Some manufacturers continue to use FRP liners, PTFE liners, and even tungsten carbide spray tubes that have been used in the lithium iron phosphate preparation system. After use, they find that the service life is extremely short. Some use of FRP straight pipes have leaks in many places within less than six months of the production line, while FRP lined elbow pipes even lasted less than a year on the ferro-phosphorus production line.   In fact, the integral wear-resistant ceramic liner has long been widely used in lithium battery production lines in Japan and South Korea. The integral wear-resistant ceramic lined elbow has the characteristics of super wear resistance, corrosion resistance and high temperature resistance. At the same time, as a non-metallic lining material with ultra-high hardness, the ceramic lined elbow can effectively block the contact between powder and iron and other harmful substances, reduce the content of iron and other impurities in the cathode material, and improve the safety performance of the battery.   The integral wear-resistant ceramic pipe steel produced by ibeno is integrally formed of 304 stainless steel (integral hot bending, non straight pipe welding), the inner wall is lined with 95 or 99 high-purity alumina ceramic pipe fired at 1700 degrees (most of 90 or 92 porcelain in the market), and the ceramic and steel pipe layer are filled with special adhesive. Different from the general ceramic lined composite pipe, this kind of pipe has smooth inner and outer walls, unobstructed air flow, very low wear, good pressure resistance and corrosion resistance. Practice has proved that, The service life of ibeno wear-resistant ceramic pipeline in high nickel ternary production line is at least five years.  

Wear-resistant ceramic rubber liner is mainly divided into three-in-one ceramic rubber liners and two-in-one ceramic rubber liners. The three-in-one liner is a combination of ceramic + rubber + steel plate, and the two-in-one liner is mainly ceramic + rubber. , The ceramic-rubber composite board is a thermal vulcanization process to vulcanize alumina ceramics with rubber and steel plates. It is mainly used for wear resistance, impact resistance, corrosion resistance, and wear resistance of major industrial and mining equipment.    1. The three-in-one ceramic rubber liner is installed by bolt welding; 2. The two-in-one ceramic rubber lining board is connected by a special adhesive. The wear-resistant ceramic rubber lining board has strong wear resistance. The rubber layer in the middle can play a buffering role and solve the problem of wear-resistant ceramics. It is caused by the different expansion coefficients between the steel plate and the steel plate, and it buffers the impact on the wear-resistant ceramics, improves the impact strength of the composite plate, and makes the material performance fully play. The production of the wear-resistant ceramic rubber composite plate is completed at one time. The quality of the ceramic liner is guaranteed, and the installation is convenient and quick; the high-strength adhesive bonds the composite board to the steel plate of the equipment to form a strong and cushioning anti-wear layer; both installation methods are convenient and quick.

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  

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.

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.

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.  

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.