First, the reason analysis of the slow material of powder material is that the main factors are the poor material in the powder tank of the concrete mixing station and the damage of the screw conveyor. The form of the powder is not smooth, such as powdered arch, material caking at the outlet of the powder jar, the opening of the butterfly valve, and the shortage of the material in the powder tank. But the main damage of the screw conveyor is the deformation of the spiral blade, which can not be conveyed normally. Solution: open air blowing arch breaking device; opening check powder tank unloading valve, and the valve is in full open position; check whether the material outlet of the powder tank caking; spiral blade deformation inspection, such as deformation correction or replacement demolition. Two. Powder name