Knowledge on types of ceramic wear-resistant elbows
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Ceramic wear-resistant elbows are generally divided into two types: one is the self-igniting ceramic elbow produced using high-temperature self-igniting centrifugal composite technology, and the other is the ceramic patch wear-resistant elbow. I. Self-igniting ceramic composite pipes are likely to be quite common. Such pipes consist of three layers, from the inside out: corundum ceramic, a transition layer, and steel. The ceramic layer inside can form dense corundum ceramics at temperatures above 2,200 degrees Celsius, and it can also form a strong bond with the steel pipe through the transition layer ； There are many small-diameter types, which are widely used in pneumatic ash conveying, dust removal, wear-resistant elbows, and wear-resistant pipes in power plants. http://www.bhgdzb.com/UploadFiles/news/2021/9/202109121633551958.jpg Ash-transferring wear-resistant ceramic elbows http://www.bhgdzb.com/UploadFiles/news/2021/9/202109121634293477.jpg Dust-removing wear-resistant elbows. II. Ceramic-coated composite pipes, as one type of ceramic composite pipe, not only take full advantage of the strengths of steel pipes such as high strength, good toughness, impact resistance, and excellent weldability, but also benefit from the advantages of corundum ceramics, including high hardness, high wear resistance, corrosion resistance, and heat resistance. They can even overcome the weaknesses of steel pipes, such as low hardness, poor toughness, and weak wear resistance ； With a hardness of over 85, the thickness of the corundum ceramic can be selected according to actual conditions, facilitating its use. It is widely used in coal powder delivery pipelines in power plants, wear-resistant pipelines in coal washing plants, and dust removal wear-resistant pipelines in cement plants and steel mills.
Self-propagating ceramic composite elbow: The self-propagating ceramic composite elbow is a type of composite pipe manufactured using the \"self-propagating high-temperature synthesis high-speed centrifugation technique,\" which results in the formation of a uniform, dense, and smooth ceramic layer as well as a transition layer at high temperatures and high speeds. Ceramics do not fall off at high temperatures, and they are relatively light in weight; composite ceramics possess high hardness and good wear resistance. Self-igniting ceramic straight pipes, wear-resistant elbows, ceramic tees, etc. have found extensive use in industries subject to severe wear, especially in dust removal and ash conveying pipelines, where they yield significant results.
Ceramic wear-resistant elbows are commonly used in power plants for handling coal powder and ash, in cement plants for cyclones, in steel mills for dust removal systems, in mines for handling mineral powder, tailings, and backfill materials, as well as in coal mines and coal washing plants for wear-resistant pipelines. They are also used in coking plants for handling coke particles and in sintering plants for transporting materials. Their service life is more than 20 times longer than that of ordinary steel pipes, and they can also be used for transporting molten aluminum and corrosive substances.
In that wear-resistant industry, wear-resistant elbows are generally impact elbows with a back arc. The eroded curved surface is prone to wearing through. This reduces the service life of the wear-resistant elbow. The current design, which features a back arc and a backpack on the wear-resistant elbow, **extends its service life. Ceramic tubes are cast by segmented centrifugal method. Ceramic wear-resistant tees consist of a elbow and a filling cover that is attached to the outer wall of the elbow. The elbow is a hollow curved pipe with open ends at both sides; ribs are installed on the outer side of the circumferential walls on either side of the elbow’s axis. The length of these ribs is the same as that of the elbow, and their curvature matches that of the elbow. A filling cover wraps around the outer surface of the elbow’s protruding part, with its sides connected to the ribs; the filling cover is filled with filler material. The filler is usually a wear-resistant ceramic coating, which has high wear resistance.