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The advantages and disadvantages of wear-resistant ceramic lining pipes with different processes

Number of visits: Date:2018-12-05 08:42
According to different production processes, wear-resistant ceramic lining pipes are divided into patch method, integral molding method and centrifugal casting method. The following is a brief introduction to several pipe processes.
The patch method is to lining the corundum-like ceramics formed by high-temperature calcination into the steel pipe. Depending on the working mode and environment, the lining method is divided into: straight-bonding method, spot-welding type, and bolt-loading type. , swallowtail card type and so on. It is suitable for pipes and elbows, and can also be used for various equipment linings. It is widely used in anti-wear engineering in various industries.
The utility model has the advantages that the wear-resisting effect is good, and the wear-resisting effect for the pipeline inner liner is twice that of the self-smoke-fired ceramic composite pipeline; the construction is convenient and flexible, and is not limited by the size of the equipment, the partial peeling can be replaced, and the cost is moderate.
The disadvantage is that the production process is relatively complicated and the production cycle is long.
The integrated molding method (RHS) uses selected alumina particles to fire the inner liner pipe by various molding methods, and then casts the integrally formed pipe inside the steel pipe with a special filler. The pipe formed by this method is different from the ceramic composite pipe formed by the self-grown combustion technology.
The utility model has the advantages that the inner wall of the pipeline is smooth and has good wear resistance, and is suitable for the slag and ash removal system with high requirements on the material of the pipeline, but the cost is high.
Centrifugal casting is a composite pipe made of "self-grown high-temperature synthesis-high-speed centrifugal technology" to form a uniform, dense and smooth surface ceramic layer and transition layer at high temperature and high speed.
Advantages: The self-grown ceramic composite pipe can be applied to high temperature areas, with simple production, convenient construction and low cost.
Disadvantages: Due to the short reaction time, the separation of low-temperature phase alumina and molten iron is not complete, resulting in the ceramic layer not dense, loose particles, micro-cracks, brittle, easy to partially fall off, and can not be repaired after falling off. The pipe diameter is not more than 600mm, and the wear resistance is lower than that of the ceramic patch pipe. Can only be made into a straight tube. If the elbow is made, the straight pipe must be welded in sections. The formed elbow is not streamlined, which hinders the material transportation and reduces the output force of the equipment.

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