Which is the best cyclone lining cast iron, polyurethane or ceramic?

A cyclone is a device that uses centrifugal force to classify and separate in a rotating flow. When the cyclone is running, the solid-liquid two-phase flow makes a strong rotational motion. Under the violent scouring of the two-phase flow, the inner wall of the cyclone is very easy to wear. This will not only shorten the service life of the cyclone, but also reduce its classification and separation efficiency due to the change in the size of key parts, change the overflow and bottom flow, and thus deteriorate the operation effect.

Therefore, the cyclone has high requirements for wear resistance, and wear-resistant materials are generally used as linings. The materials usually used to make the cyclone lining are alloy cast iron, ceramic and polyurethane materials.

The alloy cast iron lined cyclone has poor wear resistance, a short service life, and heavy weight.

Ceramic Lined Cyclone
The hardness of alumina wear-resistant ceramics is as high as HRA85 or above, which is harder than most circulating materials, making it difficult for wear-resistant ceramics to be worn by other materials and have high wear resistance; alumina wear-resistant ceramics are chemically stable and will not react chemically with most acids and alkalis, making it difficult for wear-resistant ceramics to be corroded by other materials and have high corrosion resistance; the sintering temperature of alumina wear-resistant ceramics reaches 1700℃, and it is not easy to oxidize at high temperature, so that wear-resistant ceramics can operate in the range of 0℃-800℃ for a long time and have high temperature resistance; aluminum wear-resistant ceramics are added with toughening ceramic formula, coupled with a unique spherical design, so that wear-resistant ceramics can withstand the impact of large pieces of materials and have impact resistance.

Polyurethane cyclones have been used in recent years due to their light weight, good formability, high corrosion resistance and wear resistance. However, it has been found that polyurethane cyclones work better when conveying fine particles. When there are large particles with sharp edges in the material, the high speed of the solid-liquid two-phase flow in the cyclone will cause high stress impact, which can easily cause damage to the polyurethane lining.