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

Silicon carbide wear-resistant ceramic pipes are a kind of ceramic-lined steel pipes. The lining is made of high-temperature resistant silicon carbide ceramics. It has stable organic chemical properties, a high heat transfer coefficient, a 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 effect.   Silicon carbide wear-resistant ceramic pipes are a kind of ceramic-lined steel pipes. The lining is made of high-temperature resistant silicon carbide ceramics. It has stable organic chemical properties, a high heat transfer coefficient, a 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 effect.    Silicon carbide ceramic composite pipes make full use of the characteristics of seamless steel pipes with high hardness, good ductility, impact resistance, good welding performance, high strength of corundum porcelain, wear resistance, corrosion resistance, and good temperature resistance, and get rid of seamless steel pipes. Low strength, poor wear resistance, poor ductility of porcelain. Therefore, silicon carbide wear-resistant ceramic pipes have good comprehensive properties such as wear resistance, high-temperature resistance, corrosion resistance, mechanical equipment impact resistance, high-temperature impact resistance, and good welding performance. It is a good wear-resistant and corrosion-resistant pipeline, such as the transportation of particulate raw materials, cutting and eroding substances.   Silicon carbide wear-resistant ceramic pipes are mainly used in logistics conveying systems in high-temperature environments. They have strong wear resistance and corrosion resistance and are cost-effective pipes in high-temperature conveying systems.  

The main component of an alumina ceramic sheet is alumina. Because of its high hardness and outstanding wear resistance, it has become the main product in the anti-wear industry, but the wear-resistant ceramic sheet itself does not have the function of sticking and needs to be used with ceramic glue. How to choose the ceramic glue is also a very particular problem, because the ceramic glue is used as the adhesive when the ceramic sheet is installed. Only by choosing the correct ceramic glue can the strength of the ceramic sheet achieve the best effect. The commonly used ceramic adhesives are roughly divided into three kinds:   1. Normal temperature type; the use temperature is within 150 degrees, which has a good sticking effect, and is also a commonly used model and variety, but its temperature-resistant area can only be within 150 degrees, and the sticking performance will decrease when it exceeds 150 degrees. The rise will gradually lose the sticking ability.    2. Medium temperature type; when the operating temperature is within 250 degrees, its bonding performance is the same as that of normal temperature glue, but its temperature resistance is as high as 250 degrees, and the top and side surfaces of the bonding equipment have a very good effect. Due to its high-temperature resistance, it is relatively It is relatively viscous, and it has a good effect on bonding large ceramic plates. There will be no problems such as falling off or flowing the ceramic plate before it is cured after pasting.   3. High-temperature type; Temperature-resistant ceramic glue is developed and produced for the use part of 350 degrees, and has a good effect on the high-temperature part, but the overall price will rise due to the high cost.  

The pulverized coal pipeline is used to transport high-temperature gas mixed with hard particles. Its operating characteristics are high temperature, high flow rate, high particle hardness, and serious equipment wear, especially the elbow part, without any protective measures. Put on. Most of this equipment is mounted on high-altitude supports, which are inconvenient for maintenance. Once worn out, the safe use of the equipment will be seriously affected.   The service life of the pulverized coal conveying pipeline is greatly improved after being lined with wear-resistant ceramics. The corundum ceramic lining is a material with wear resistance, high-temperature resistance, high hardness, acid and alkali corrosion resistance, and very high thermal stability. The steel pipe is bonded by wear-resistant ceramic adhesive, which is convenient for construction, has high bonding strength, and the lining is smooth and does not accumulate material.    Ceramic pipes are lined with corundum ceramics, which is generally ten times or even dozens of times that of ordinary steel pipes, and has a qualitative leap in wear resistance with wear-resistant alloy cast steel pipes and cast stone pipes. The service life of ordinary steel pipes is half a year to one year, and the service life of wear-resistant ceramic pipes can reach 5 to 10 years, which greatly reduces the number of equipment downtime and maintenance, and saves a lot of manpower and material costs for enterprises. It is a very cost-effective anti-wear scheme for pulverized coal conveying pipelines.

Wear-resistant ceramic glue is the main tool for fixing wear-resistant ceramic tube lining ceramics. Its use method is very different from ordinary glue. Let's talk about the specific use steps of wear-resistant ceramic glue. Grinding and dust removal: Before pasting the wear-resistant ceramic sheet, first grind and dust off the steel parts of the porcelain pasting equipment to remove rust until the original color of the metal is exposed.   Glue.:Under normal temperature conditions, mix according to the ratio of AB glue 2:1, and stir evenly, after the preparation is completed, try to use it up within 30 minutes to prevent the glue from curing.    Apply: Apply glue to the ceramic parts that have been polished and cleaned, and be sure to apply it fully, and there should be no glue shortage. Make sure that the front and all sides of the ceramics are covered with adhesive, and the gaps between the ceramics should also be filled with adhesive.   Bonding: After the gluing is completed, use a blade to cut the adhesive tape, and use a wooden hammer to compact the ceramic sheet to let the excess glue flow out. To ensure the adhesive strength, the thickness of the glue should be kept within 0.5mm.   Patching: The gap between the ceramic sheets should be filled with wear-resistant ceramic glue, the size of the gap should be kept within 1mm, the glue should be evenly filled, and there should be no glue leakage. Curing: After the ceramic sheet is pasted, it can be put into use after curing for 24 hours to 48 hours.

The installation process of alumina ceramic tube is mainly divided into three steps: porcelain ring splicing, porcelain ring pasting and grinding. Porcelain ring splicing: Porcelain rings are spliced with glue according to the requirements of the drawings to ensure that the interior is flat. Porcelain ring paste: apply the adjusted adhesive on the inner wall of the pipe to ensure that it is even, and then apply the adhesive on the spliced ceramic ring to ensure that the entire pipe is pasted on the inner wall of the pipe at one time. After fixing, check whether there is any dislocation and leakage of glue on the inner wall of the pipe. After checking, place the pasted pipe in the designated position. Grinding: After the adhesive is completely cured, grind the excess ceramic rings on both sides of the pipe to ensure that it is flat and does not damage the flange.

When the flow direction changes, the acting torque of the fluid on the wear-resistant ceramic compensator cancels each other out, and there is no undercut phenomenon of the wear-resistant ceramic compensator, so the dynamic stability is relatively good. The pressure drop inspection of the wear-resistant ceramic compensator is carried out during the clean water simulation debugging.   During the full stroke operation of the wear-resistant ceramic compensator, check the pressure drop changes at both ends of the wear-resistant ceramic compensator, whether there is noise caused by cavitation or flash evaporation, how the flow rate changes, and whether it meets the designed flow characteristics Wait. Start timing when the wear-resistant ceramic compensator changes and the time required for the valve position of the wear-resistant ceramic compensator to reach 63% of the steady state position is the response time, and the time should meet the operational requirements of the process production process.    The thickness of the ceramic patch has reached 8-10mm. Adding a 10mm thick wear-resistant layer to some large-diameter corrugated compensators is equivalent to reducing the inner diameter by 20mm. If the diameter is large, it may not be obvious. However, it is prominent in some pipelines, such as stainless steel corrugated compensators with a diameter of around DN200. At this time, we need to consider the problem of inner diameter.   If you want to keep the inner diameter of the stainless steel corrugated compensator with normal specifications, then you need to enlarge the overall outer corrugated pipe to ensure the inner diameter of the finished product. The valve body of the wear-resistant ceramic compensator is straight-through, and the fluid is blocked by the ceramic inner wall moving down and pressing the valve body. Because the valve body is straight-through, the fluid blocking and sealing ability is not as good as the weir-type wear-resistant ceramic compensator.   Affected by the ceramic inner wall and lining material, the wear-resistant ceramic compensator cannot be used in high-temperature and high-pressure conditions. The general working pressure is not more than 1.6MPa, and the working temperature is not more than 150℃. The wear-resistant ceramic compensator seals the fluid with a ceramic inner wall, therefore, no packing is required, which reduces the dead zone limit and avoids leakage. However, due to the material characteristics of the ceramic inner wall, its reproducibility is not high, and there is a large hysteresis.   The flow characteristic of the wear-resistant ceramic compensator is similar to the quick-opening characteristic, that is, it presents a linear characteristic within 60% of the stroke, and after more than 60% of the stroke, the flow changes very little. The flexural deformation of the bending arm of the wear-resistant ceramic compensator enables the wear-resistant ceramic compensator to press the sealing ring tightly to ensure a good seal, and the standard leakage is less than 0.01% ℃.

The effect of wear-resistant ceramics is mainly reflected in the wear resistance of ceramic materials. To obtain Al2O3 ceramic material with high wear resistance, it is necessary not only to make it have high density, flexural strength, and compressive strength but also to improve its hardness and fracture toughness, which is consistent with the microstructure of Al2O3 ceramics (pore closure, grain size, glass distribution state, etc.) and its wear mechanism are closely related.   During the preparation process, various process conditions of alumina ceramics have a great influence on its sintering and microstructure. These techniques include the powder preparation process, particle size distribution, molding method, billet density, sintering temperature, heating rate, holding time, atmospheric heating, pressure, etc. Control the three main factors affecting the performance of wear-resistant ceramics, namely better alumina raw materials and their grinding grades, preparation methods of high-density green bodies, reasonable combustion temperature and holding time, so that the comprehensive performance of the produced wear-resistant ceramics is excellent, The microstructural display is also very beneficial for wear resistance.     High-purity Al2O3 powder is an important raw material for wear-resistant ceramics, and its properties and content have a great influence on alumina ceramics. During the preparation of ceramic powder, impurities are inevitably introduced, organic impurities are burned during the sintering process, and irregular pores appear during the densification process; inorganic impurities may react with the ceramic powder at high temperature, or leave microcracks in the matrix. These microstructural defects caused by impurities seriously affect the compactness of alumina ceramics. High-purity Al2O3 powder is an important prerequisite for the preparation of alumina ceramics with excellent properties.   Wear-resistant ceramics are wear-resistant ceramic powders purified from industrial sintered powders through multiple processes. According to product requirements, formula mixing, molding, sintering, and other processes. The wear-resistant ceramics produced by this method have good performance, but due to the long process, the production cost is high. To save costs, minerals such as kaolin are also used directly as the main raw material on the market, with a small amount of sintered alumina added. At present, the existing alumina ceramic waste is used as the main raw material. The alumina ceramics that form the α phase cannot organically combine with the surrounding molecules, resulting in poor compact wear resistance. Therefore, there is a huge price difference in the market for wear-resistant ceramics.

Hunan Yibeinuo New Material Co., Ltd. is one of the very professional equipment anti-wear enterprises, focusing on the research and development of wear-resistant ceramics, new materials, and anti-wear and energy-saving technologies, dedicated to cement, thermal power, steel, coal, ports, chemicals, Mineral processing, petroleum, machinery and other industries provide a set of anti-wear technical services such as technical consultation, engineering design, equipment production, and equipment installation to achieve energy saving and consumption reduction of enterprises.    The application scope of wear-resistant ceramics in the mineral processing industry mainly includes the following aspects: 1. Material conveying system: bucket wheel side guard, bucket wheel feed chute, belt drum, belt cleaner, ceramic bearing idler, stacker feed bin, coke hopper, hopper, vibrating feed screen castor plate, Zipper feeding chute, screw conveyor rotor, ore transfer hopper, etc. 2. Medium-speed grinding (vertical grinding): vertical grinding feed trough. Three lock dampers. Vertical grinding roller sealing ring. Vertical grinding cylinder. Vertical grinding of the inner vertebral body. Select the cone of the powder machine. Select the static blade of the powder machine. Select the support rod for the powder machine. Select the shell of the powder machine. Vertical mill outlet air duct. Cyclone etc. 3. Slurry conveying system: tailings slag discharge pipe, elbow, ceramic valve, rubber hose, ceramic pinch valve, screw conveyor, pulp conveying pipe, pump casing, distributor, etc. 4. Separation system: cyclone, cyclone bottom push, magnetic separator cylinder, ceramic vacuum filter, etc.  

According to the structure and use, wear-resistant ceramic pipes can be divided into four categories: composite wear-resistant ceramic pipes, installation wear-resistant ceramic pipes, integral wear-resistant ceramic pipes, and ceramic rubber hoses. More commonly used is the installation of wear-resistant ceramic pipes, which are cost-effective and suitable for straight pipes, elbows, and tees.   The structural characteristics and uses of ceramic pipes are as follows: 1. Composite wear-resistant ceramic pipeline: It is formed by self-diffusion high-temperature centrifugal casting. The pipeline is composed of three layers of corundum ceramic, a transition layer, and steel. It is used for straight pipe transportation, and the price is better than the other three wear-resistant ceramic pipelines. 2. Install wear-resistant ceramic pipes: by sticking, stud welding, or dovetail interlocking, install wear-resistant ceramic sheets on the inner wall of the pipe to form a firm wear-resistant layer. Parts with severe erosion and wear such as elbows and tee distributors have superior wear resistance and corrosion resistance and have a high cost performance. It is one of the most widely used pipes at present. 3. Overall wear-resistant ceramic tube: Prefabricated high-purity ceramic tube by isostatic pressing technology, and then poured into the inner wall of the steel tube. Different from the composite wear-resistant ceramic tube, the density, hardness, and wear resistance of the lining ceramic layer have a qualitative leap, and the service life is more than 10 times that of the composite material. The integral molding has no gaps and is usually used to transport strong corrosive slurries. 4. Ceramic rubber hose: The advanced vulcanization technology introduced from abroad is used to vulcanize high-quality wear-resistant ceramics in the rubber hose, which not only has wear resistance but also has the flexibility of rubber. It has good flexibility and wear resistance and can be used to isolate mechanical vibrations or connect non-fixed equipment instead of expansion joints or expansion joints.  

As a very important connection point in the powder conveying system for the production of lithium battery materials, the service life of the pipeline often determines the maintenance time and work efficiency of the entire transportation system. Due to material erosion, bent pipes need to withstand greater impact and wear than straight pipes. Alumina has been widely used in powder conveying systems in the lithium battery industry because of its super wear resistance.   Before the application of wear-resistant ceramic elbows, the pipes of the cathode material of lithium batteries were mainly made of glass material. The advantage is that it can isolate metal pollution and ensure the quality of lithium batteries. The disadvantage is that it is brittle, weak in impact resistance, and easily damaged and broken. The wear resistance of ordinary glass materials is relatively weak.   Compared with glass, wear-resistant ceramic materials have greater advantages. It can also isolate metal pollution, and its hardness far exceeds that of metal and glass. It has excellent wear resistance and guaranteed impact resistance.   To sum up, wear-resistant ceramic pipes in lithium battery powder conveying systems are popular, mainly because they are reasonably priced, can isolate metal pollution, and are wear-resistant and impact-resistant, which can greatly extend the life of the pipeline and improve the working efficiency of the material conveying system.