Powder spraying device capable of achieving pressure relief and accurately controlling spraying amount

Abstract

The invention discloses a powder spraying device capable of achieving pressure relief and accurately controlling the spraying amount. The powder spraying device comprises a machine base. A dividing part is arranged in the middle of the machine base, and the interior of the machine base is divided into a stock bin and a mixing bin. A blanking opening is formed in the dividing part and is connectedwith the stock bin and the mixing bin. An inserting groove is formed in the dividing part in the horizontal direction, a sliding quantitative baffle is arranged in the inserting groove, and a quantitative opening is formed in the sliding quantitative baffle. A pull rod is arranged at the tail end of the sliding quantitative baffle, a high-pressure air inlet pipe is arranged on the side edge of themixing bin and connected with an air distributing part, and the air distributing part is provided with an air spraying pipe and a constant-pressure pipe. The air spraying pipe is inserted into the mixing bin, and the constant-pressure pipe is connected with the top of the stock bin. A molten aluminum pool is formed in the side edge of the mixing bin, the mixing bin is provided with an extending graphite pipe, and the graphite pipe is inserted into the molten aluminum pool. The spraying amount of a refining agent can be rapidly and accurately controlled, it is guaranteed that the concentrationof a sprayed gas-powder mixture is continuous and stable, and the conveying of the refining agent can be suspended when a spray rod is blocked.

Description

technical field [0001] The invention relates to a powder spraying device which has a pressure relief function and precisely controls the spraying amount. Background technique [0002] The refining agent is a white powder or granular flux, which is prepared by mixing various inorganic salts in a certain proportion after drying. It is mainly used to remove hydrogen and floating oxidized slag inside the aluminum liquid. [0003] In the aluminum alloy refining process, a powder spraying device is required to spray the refining agent. However, the powder spraying device in the prior art has the following disadvantages: it is difficult to adjust the delivery amount of the refining agent in time according to the spraying situation ahead, and it cannot be conveniently adjusted according to the needs. Adjust the concentration of the injected gas-powder mixture, and the concentration of the injected gas-powder mixture cannot be guaranteed to be continuous and stable; when the graphite...

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Problems solved by technology

[0003] In the aluminum alloy refining process, a powder spraying device is required to spray the refining agent. However, the powder spraying device in the prior art has the following disadvantages: it is difficult to adjust the delivery amount of the refining agent in time according to the spraying situation ahead, and it cannot be conveniently adjusted according to the needs. Adjust the concentration of the injected gas-powder mixture, and the concentration of the injected gas-powder mixture cannot be guaranteed to be continuous and stable; when the graphite tube or the spray rod is completely blocked, the refining agent delivery mechanism may not be able to obtain the feedback signal in time, and it is still Transportation, resulting in excessive accumulation of refining agent in the entire pipeline, it is difficult to clean up; the delivery speed of refining agent will be related to the amount of refining agent in the container, and the delivery speed of refining agent is uneven

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