In order to ensure unobstructed powder cutting, a powder accumulation elimination system is provided, and air vibration is used. After the powder is accurately measured by the feeder, it is transported by a screw conveyor to the dissolving tank. The dissolved water is injected in a certain proportion at the same time, and a certain concentration of solution is formed by stirring through a mixer. The prepared solution is added from the screw pump to the dosing point, the dosing amount can be controlled quantitatively by frequency conversion, and the dosing point flowmeter is set at the dosing point, which can clearly and accurately display the dosing amount. The flow rate of the screw conveyor can be adjusted linearly according to the water inlet volume through the frequency converter to form a certain concentration of carbon slurry, and the dosing concentration can be set on the PLC as needed. The entire dosing system is automatically added according to the automatic control signal. When the dosing amount is large, the dosing can be achieved by changing the frequency and increasing the number of pump sets. When the dosing amount is small, the working conditions of the dosing pump can be met by reducing the dispensing concentration or reducing the operating pump set.