Introduction of wear-resistant ceramic pipe manufacturers Ceramic pipe features
I. Types of wear-resistant ceramic pipe
1. Self-spreading combustion high-temperature synthesis technology
Wear-resistant ceramic pipe is manufactured by adopting a high-technology production process - self-spreading combustion high-temperature clutch synthesis method. The tube from inside to outside by corundum ceramics, transition layer, steel three-layer composition, ceramic layer is formed at a high temperature of more than 2200 ℃ dense corundum ceramics (AL2O3), through the transition layer with the formation of a solid bond with the steel pipe. Small diameter ceramic wear-resistant pipe corrosion-resistant direct 2, paste technology
Strong adhesive, welding or set of alumina ceramics pasted on the inner wall of the pipe, cured by the temperature to form a solid anti-friction layer. The production process is simple, the production cycle is long, not suitable for large quantities.
Two, wear-resistant ceramic pipe features
1, wear-resistant ceramic pipe lined with corundum ceramic AL2O3, Mohs hardness of up to 9.0 equivalent to HRC90 or more, and its wear-resistant life is hardened steel ten or even dozens of times.
2, wear-resistant ceramic pipe internal surface smooth, and never rust, not like seamless steel pipe internal surface convex spiral line exists, the smoothness of the internal surface is better than any metal pipeline, the clear resistance coefficient of 0.0193, slightly lower than the seamless pipe. Therefore, it has the characteristics of small running resistance and so on, which can reduce the running cost.
3. The ceramic layer is AL2O3, which is neutral in character. Therefore, it is resistant to acid and alkali and seawater corrosion, and at the same time has the characteristics of anti-scaling.
4, the ceramic layer is a single stable crystalline organization, wear-resistant ceramic pipe can be in the -50 - 700 ℃ temperature range of long-term normal operation, the material coefficient of linear expansion of 6-8 × 10-6/0C, about 1/2 of the seamless steel pipe.
5, wear-resistant ceramic tube light weight, price is appropriate. 60% lighter than the same inner diameter of the cast stone pipe; 20-30% lighter than the weight of wear-resistant alloy pipe, and wear-resistant, corrosion-resistant, because of the long service life, and thus the cost of the support bracket, handling costs, installation costs, as well as operating costs are reduced. By the relevant design institutes and construction units engineering budget and the actual comparison of the project, the pipe project cost is comparable with the cast stone, compared with the wear-resistant alloy pipe, the project cost decreased by about 20%.
6, due to wear-resistant ceramic pipe weight is light, and good welding performance. Therefore, welding, flange, quick connection and other methods can be used, construction and installation is convenient, and can reduce installation costs.
Third, the application of wear-resistant ceramic pipe
Ceramic wear-resistant pipe used in which industries
Because the pipe has wear-resistant, corrosion-resistant, heat-resistant performance, so it can be widely used in electric power, metallurgy, mining, coal, chemical industry as the transmission of sand, stone, coal dust, ash, aluminum liquid and other grinding particles and corrosive media, is an ideal wear-resistant corrosion-resistant pipe.
1, metallurgy, electric power industry applications
Metallurgy, electric power industry conveying coal dust, ash, mud, lime gypsum slurry and so on need to consume a large number of metal pipes every year. The use of ceramic composite pipe to replace other pipes, with high wear resistance, long life, easy to install, the characteristics of significant economic benefits. Shandong Liaocheng Changrun Thermal Power Plant, Liaocheng Zhonghua Power Plant, Beijing Beixin Building Materials Group, Henan Hebi Power Plant, Gansu Pingliang Power Plant, Taiyuan Coal Preparation Plant, Hunan Shimen Power Plant, Hebei Jinniu Energy Company Limited Gequan Coal Preparation Plant, Xingtai Coal Preparation Plant, and other industrial operations, its operating life is more than ten or even dozens of times that of steel pipe.
2, mining, coal industry applications
(1) mining: mine filling, concentrate powder and tailings delivery of serious wear and tear on the pipeline, the previous use of ore powder conveying pipeline, such as Panzhihua, Daye mines, etc. service life of less than a year, changed to the pipe can make the life of about 5 times higher.
(2) coal: coal and long-distance pipeline coal conveying commonly used wet conveying, the requirements of both wear-resistant and corrosion-resistant conveying pipe, the use of the pipe can be used as a long-life conveying pipe, the economic benefits can be considerable.
3, other
(1) the pipe does not contaminate and non-adhesion of molten aluminum. Manufacturing sensitive to iron pollution, and after the use of heavy labor is required to organize and repair the molten aluminum equipment, aluminum liquid conveying pipe, rising liquid pipe is currently the ideal material.
(2) the tube due to good wear resistance and resistance to thermal corrosion. Suitable for conveying corrosive materials containing solid particles and high-temperature corrosive gases, sulfur-containing geothermal water and other corrosive media.
Four, wear-resistant ceramic pipe precautions
1, the inner layer of ceramic hardness, toughness, but in the handling, installation process should be light to avoid serious collision, especially to avoid direct contact with metal instruments or impact on the end surface ceramic layer.
2, the installation of wear-resistant ceramic pipe, pipe centerline should be correct, the height should be leveled to ensure that the two ends of the accurate, the two end of the face of the amount of misalignment should be controlled within 1.0mm.
3, the use of flexible pipe sleeve connection installation of wear-resistant ceramic pipe flexible pipe sleeve insertion length of the two ends should be adjusted symmetrically, due to the thermal expansion coefficient of wear-resistant ceramic pipe for the steel 1 / 3 or so, so the expansion gap can be reduced to 3-5mm.
4, the use of flange connection, the flange end face and wear-resistant ceramic pipe end face flush.
5, due to the excellent welding performance of wear-resistant ceramic pipe, so the pipe connection is carried out by welding, in the welding of its bevel 70 ° - 90 °, blunt edge of 2 -4mm without leaving a gap, it is recommended to use small current welding.
Five, wear-resistant ceramic pipe manufacturers profile ceramic pipe characteristics picture