The wear-resistant ceramic lined pipe is light in weight, and the wear-resistant ceramic lined with hardness is anti-wear, which solves the problem of wear-resistant products with thickness in the past. According to different production processes, wear-resistant ceramic linings are divided into the patch method, integral molding method, and centrifugal casting method. The following is a brief introduction to several pipeline processes.
The patch method is to line the flaky corundum ceramics formed by high-temperature calcination into the steel pipe. According to different working methods and environments, it can be used for the lining of various equipment and is widely used in various anti-wear projects. The advantage is that the wear resistance is good, and the wear resistance of the pipeline lining is twice that of the self-propagating ceramic composite pipeline; the construction is convenient and flexible, not limited by the size of the equipment, the local shedding can be replaced, the cost is moderate, and the disadvantage is that it is not resistant to high temperature.
The one-piece molding method uses selected alumina particles to fire the lined pipes by various molding methods, and then pours the one-piece pipes inside the steel pipes with special fillers. The pipes formed by this method differ from the ceramic composite pipes created by the self-propagating combustion technology. The lined ceramic crystals are exactly the same as the patch ceramics. The advantages are that the inner wall of the pipe is smooth and the wear resistance effect is good. The slag conveying and ash removal system has the disadvantage of high cost.
Centrifugal casting is a composite pipe manufactured by “self-propagating high-temperature synthesis-high-speed centrifugal technology”, which forms a uniform, dense and smooth surface ceramic layer and transition layer at high temperature and high speed. Advantages: Self-propagating ceramic composite pipes can be used in high-temperature areas, with simple production, convenient construction, and low cost. Disadvantages: Due to the short reaction time, the low-temperature phase alumina is not entirely separated from the molten iron, resulting in a non-dense ceramic layer, loose particles, many microscopic streaks, brittleness, and it is easy to partially fall off and fail, and it cannot be repaired after falling off. If it is made into an elbow, the straight pipe must be welded in sections (shrimp joints).