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

The wear-resistant elbow of the powder feed pipe mainly starts from the air box at the outlet of the pulverized coal mixer and the powder exhaust fan to the burner and the tertiary air outlet and connects the recirculation air duct from the outlet air box of the powder exhaust fan to the inlet of the coal mill. The elbow part in the pipeline, because it mainly transports solid powder media, has relatively strong abrasion strength. The selection of wear-resistant materials for the powder-feeding pipeline wear-resistant elbow should have high toughness and impact resistance, high hardness and cutting Strong wear-resistant ceramic material.   The wear-resistant elbow of the powder-feeding pipe is lined with wear-resistant ceramic material. The wear-resistant performance of the powder pipe is very good, the hardness reaches about HV1800, and the wear resistance is more than 10 times that of ordinary steel; it also has good Impact resistance, even in harsh working conditions, you can easily face it; corrosion resistance is also particularly good, after lining wear-resistant ceramics, it will not react with acid and alkali, and will not be oxidized, resulting in The rust is mixed into the pulverized coal, causing incomplete combustion.   The use of wear-resistant ceramics as wear-resistant materials for powder-feeding pipe wear-resistant elbows is the most cost-effective choice. Wear-resistant ceramics can make the inner wall of the pipe very smooth and smooth without causing powder bulk material. The use effect is very good. The service life is very long, generally about 10 times that of ordinary elbows. Wear-resistant ceramics are currently one of the most popular wear-resistant materials for powder-feeding pipe wear-resistant elbows.  

The wear-resistant pipe is used for the serious part of the engineering wear, and the internal addition of a composite pipe of the wear-resistant layer is added to energy conservation and emission reduction, wear-resistant and anti-corrosion.   Depending on the abrasion conditions, there are also different material selections on the wear-resistant pipeline liner. Continuous wear-resistant ceramic pipe (liner differential aluminum, silicon carbide, boron nitride, etc.), abrasion-resistant alloy tube, turtle-resistant mill, wear-resistant cast stone tube, self-propagating composite pipe, etc. Wear-resistant ceramic composite pipes with conventional steel pipes, wear-resistant alloy cast steel tubes, cast stone tubes, and self-propelled tubes. The outer layer of the wear-resistant pipe is a seamless steel pipe, and the inner layer is corundum ceramics. The hardness of the corundum is up to HV1100-1400, and wear resistance is 20 times higher than the carbon steel tube. Wear-resistant pipeline anti-wear is mainly against the inner lining of alumina ceramics.   Wear-resistant ceramic composite pipelines quickly occupy the market, in addition to high quality, and good performance, but also its performance ratio is higher than other wear-resistant pipes. In terms of wear-resistant pipelines of the same specifications and unit lengths, the wear-resistant ceramic composite pipe weight is only about one or more of the wear-resistant alloy casting steel pipe, and its project cost is reduced by 20% -30%.   The wear-resistant ceramic composite tube is a corundum ceramic (A-Al2O3), Moh's hardness can reach 9.0 equivalent to HRC90 or more, the wear-resistant life is ten times more than ten times, and the inner surface is smooth, which is small. The weight of the pipe is light, the welding performance is good, which can be welded, flange fast linkages, etc., the construction is convenient, and the installation fee can be reduced.    

With the development of each city and the heating up of infrastructure, the cement industry has also begun technological innovation. On the one hand, in order to increase productivity and improve the working environment, on the other hand, the problem of equipment wear has become more and more urgent to solve.   Equipment wear and tear has seriously affected the normal production of the cement industry and has led to an increase in production costs and maintenance costs. The application of wear-resistant ceramics in the cement industry greatly extends the service life of wear-resistant parts, which is of great significance in improving equipment production efficiency, reducing production costs, and saving resources. According to the mechanism and form of wear, wear can be divided into abrasive wear, erosive wear, and corrosive wear. Different wear-resistant ceramic processes are used according to the wear of the equipment.   The base material of equipment in the cement industry is composed of steel, and steel abrasion is the external manifestation of equipment abrasion. As the wear problem generally only occurs on the surface and part of the part, the use of surface protection measures to control and delay the damage of the surface has become an effective method to solve the wear problem. In the course of decades of development, the research and innovation of wear-resistant materials have never stopped. Cast stone, cast steel, alloy steel, thermal spraying, wear-resistant coating, wear-resistant mortar and other materials. Among them, alumina ceramics has become one of the most widely used wear-resistant materials due to its high wear resistance, high hardness, oxidation resistance, corrosion resistance and extremely high resistance to high and low temperature strength. In the coal and ash of cement plants, the hardness of almost all hard mineral particles is higher than that of ordinary carbon steel, but generally does not exceed the hardness of wear-resistant ceramics, which is second only to diamond in hardness.   According to the principle of equipment wear in cement plants, the equipment is divided into pneumatic conveying equipment and material conveying equipment. The anti-wear of pneumatic conveying equipment is mainly to increase the hardness of the surface material, and the anti-wear of the material conveying system is mainly to increase the toughness of the anti-wear material. , Supplemented by hardness.   Grasp the wear of the equipment and the respective characteristics of commonly used wear-resistant materials, and then select suitable wear-resistant materials and anti-wear methods according to the wear of different parts, in order to effectively improve the wear resistance of the equipment, thereby increasing the overall life of the equipment.    

Corrosion resistance, anti-scaling Because the steel ceramic layer is (a-AL2O3), it is neutral. Therefore, it has acid and alkali resistance and seawater corrosion resistance, while having the characteristics of anti-scaling.   Good performance Because the corundum ceramic (a-AL2O3) is a single stable crystalline structure, therefore, the composite pipe can operate normally in the temperature range of -50-900℃ for a long time. The coefficient of linear expansion of the material is 6-8×10-6/0C, which is about 1/2 of that of the steel pipe. The material has good thermal stability.   Low project cost The ceramic composite pipe is light in weight and reasonable in price. It is 50% lighter than the cast stone pipe of the same inner diameter; 20-30% lighter than the wear-resistant alloy pipe, and has good wear and corrosion resistance. Because of the long service life, the support and hanger costs, handling costs, installation costs, and Operating costs are reduced. Comparing the project budget and the actual project by the relevant design institutes and construction units, the project cost of the pipe is equivalent to that of cast stone. Compared with the wear-resistant alloy pipe, the project cost is reduced by about 20%.   Convenient installation and construction Because the tube is light in weight and has good welding performance. Therefore, welding, flanges, quick coupling, etc. can be used, which is convenient for construction and installation and can reduce installation costs.