According to the different wear medium and erosion speed of the flue wear pouring material, generally in the duct, elbow and cyclone separator at the construction thickness of 20mm, local wear is serious parts, such as the separator cutting cone bucket, cutting chute, etc., can increase the construction thickness to 30mm or 40mm.If the construction thickness is more than 20mm, it is necessary to weld the isolation rebar on the equipment motherboard first.When the construction thickness is 30mm, 6mm steel bar shall be adopted.When the construction thickness is 40mm, 8mm-10mm steel reinforcement shall be adopted;Then weld the steel mesh on the rebar, stirring and daubing procedures are the same as when the construction thickness is 20mm.