Controllable atomizing device for producing aluminum powder and atomizing method thereof

Abstract

The invention provides a controllable atomizing device for producing aluminum powder and an atomizing method thereof. The controllable atomizing device comprises a heat-preserving furnace and an atomizer, wherein a liquid outlet of the heat-preserving furnace is communicated with a liquid inlet of the atomizer through a constant-temperature pipe, the constant-temperature pipe is a hollow sleeve pipe, the inner part of the constant-temperature pipe is provided with a molten-aluminum flow passage, the pipe wall of the constant-temperature pipe comprises an inner wall and an outer wall, a hollow interlayer is positioned between the inner wall and the outer wall, the inner part of the hollow interlayer is introduced with high-temperature inert gas, a gas inlet and a gas outlet are arranged on the hollow interlayer, and a regulating valve is arranged at the connecting part of the constant-temperature pipe and the atomizer. The constant-temperature pipe and a flow-quantity regulating valve are added between the heat-preserving furnace and the atomizer of high-temperature molten aluminum, the molten aluminum flows through the inner part of the constant-temperature pipe, the temperature of the molten aluminum is always kept within the temperature range suitable for atomization through the constant-temperature pipe, the phenomenon of ultrahigh temperature or ultralow temperature cannot appear, the uniform flow quantity of the molten aluminum entering the atomizer can be ensured through the flow-quantity regulating valve, thereby the quality of the atomized aluminum powder is ensured, the granularity of the aluminum powder is uniform, and the fine-powder rate is high.

Description

Technical field: [0001] The invention belongs to the technical field of metal powder production, and in particular relates to a controllable atomization device for aluminum powder production and an atomization method thereof. Background technique: [0002] At present, domestic and foreign aluminum powder manufacturers, when atomizing high-temperature aluminum liquid, almost all use high-temperature aluminum liquid to come out of the holding furnace and directly enter the atomizer, and then spray out at high speed through the nozzle of the atomizer for atomization. With this atomization method, when the high-temperature aluminum liquid flows from the holding furnace to the nozzle of the atomizer, the temperature of the aluminum liquid will change, and an oxide layer will appear on the surface of the aluminum liquid, which will affect the quality of the aluminum powder; before atomization Cooling, the lowering of the temperature of the aluminum liquid affects the particle si...

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Problems solved by technology

[0003] In summary, in order to overcome the deficiencies of the prior art problems, the present invention provides a controllable atomization device for aluminum powder production and an atomization method thereof, It is to add a constant temperature tube and a flow regulating valve between the holding furnace of the high-temperature aluminum liquid and the atomizer. The aluminum liquid flows through the constant temperature tube, and the constant temperature tube ensures that the temperature of the aluminum liquid is always kept within the temperature range suitable for atomization. If the temperature is too high or the temperature is too low, the flow regulating valve can ensure the uniform flow of aluminum liquid entering the atomizer, so as to ensure the quality of the atomized aluminum powder, the particle size of the aluminum powder is uniform, and the fine powder rate is high

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