When the air blower is running in the workplace with more air particles or dust, the impeller blades are easy to be scratched, resulting in different degrees of wear of the shell and impeller of the air blower, which directly affects the production in some places, so the wear-resistant structure design and process measures are very critical, otherwise it will be difficult to ensure the reasonable service life of the rotor.Suitable for 4-72, 4-68, 6-51 and other series, generally suitable for cement plants, steel mills, power plants waste heat cycle and other bad environment with large dust content.