Dark brown, the first layer is an outer rigid body, the second layer is an adhesive layer, and the third layer is an alumina layer (innermost layer).
Self-propagating ceramic composite pipe
1. production process: self-propagating ceramic composite steel pipe is made by advanced self-propagating high-temperature centrifugal synthesis process. The pipeline consists of corundum ceramics, transition layer and steel body from inside to outside. The ceramic layer is a dense corundum ceramic formed at a high temperature above 2200 degrees, which is firmly combined with the steel pipe through the transition layer. The process adopts the method of self-propagating centrifugal casting, which mainly uses the chemical reaction of the substance itself to generate high temperature through exothermic combustion and synthesize new substances during the propagation of combustion waves.
2. Performance characteristics: good wear resistance. The lining is made of corundum porcelain (AL2O3), and Mohs hardness > 9.0 is equivalent to HRC > 90. Therefore, it has high wear resistance to any transmission medium such as electric power, metallurgy, mining, coal mine and chemical industry, and its service life is more than 10 times that of ordinary steel. Because the inner lining is made of corundum porcelain (AL2O3) with a single stable crystal structure, the linear expansion of the material is 6~8× 10-6/℃ after long-term operation at the temperature range of -50~600℃, and the inner surface of the composite steel pipe is smooth, with comprehensive properties such as low running resistance, corrosion resistance, anti-scaling and good welding performance. Direct welding, flange connection, quick pipe joint and other connection methods can be adopted, and the construction and installation are very convenient. 3. Wide application: Because of its wear resistance, corrosion resistance, heat resistance and other properties, the pipe can be widely used as abrasive particles and corrosive media in power, metallurgy, mining, coal, chemical industry and other industries, and it is an ideal wear-resistant pipeline.
1, used in metallurgy and power industry. Metallurgical and electric power industries need to consume a lot of metal pipes to transport pulverized coal, ash and mud every year. Replacing other pipes with ceramic composite pipes has the characteristics of high wear resistance, long service life, convenient installation and remarkable economic benefits, and its service life is ten times or even dozens of times that of steel pipes.
2. Application in mining and coal industry (1) mines: Mine filling and transportation of concentrate powder and tailings have serious wear on pipelines. The service life of the ore powder conveying pipelines used in Panzhihua and Daye Mine is less than one year. If this pipeline is replaced, the service life can be increased by about five times. (2) Coal: Wet transportation is widely used in long-distance transportation of coal preparation and coal slurry pipeline transportation, and the pipeline is required to be both wear-resistant and corrosion-resistant. It can be used as a long-life pipeline with considerable economic benefits.
3. Other tubes (1) do not pollute or adhere to molten aluminum. At present, it is an ideal material for manufacturing aluminum smelting equipment, aluminum liquid conveying pipes, liquid lifting pipes, etc., which are sensitive to iron pollution and need heavy labor for finishing and maintenance after use. (2) The pipe has good wear resistance and thermal corrosion resistance. It is suitable for conveying corrosive materials containing solid particles and corrosive media such as high-temperature corrosive gas and sulfur-containing geothermal water.