Wear-resisting fan Gy4 -73 boiler centrifugal fan is suitable for ventilation and induced draft fan system of 2-670 tph steam boiler in fossil-fuel power station. Gy4-73 can also be used for mine ventilation and general ventilation without other special requirements. The medium conveyed by the abrasion-resistant fan fan is air, the highest temperature shall not exceed 80OC, and the medium conveyed by the induced draft fan is flue gas, the highest temperature shall not exceed 250OC. Before the induced draft fan, it is necessary to install the dedusting device. According to the general use of power plant, the dedusting efficiency should not be less than 85% .