Plasma atomizing powdering device applicable to high-melting-point metal

Abstract

A plasma atomizing powdering device applicable to a high-melting-point metal comprises a material conveying device, a vertical melting chamber, an atomizing chamber, a powder collecting device, a vacuum pumping system and a cooling gas supplying and conveying device, wherein the feeding end of a flow guide pipe communicates with a liquid draining hole in the bottom part of the melting furnace, andthe discharging end of the flow guide pipe is positioned in the atomizing chamber and is right above a collecting area of plasmas which are injected through a plasma torch assembly; a heating and heat preserving device is arranged at the outside of the flow guide pipe; and a blocking rod for blocking the liquid draining hole and a lifting driving device for driving the blocking rod to ascend anddescend are arranged in a vertical melting barrel body. The plasma atomizing powdering device applicable to the high-melting-point metal is simple in structure, capable of heating and preserving the heat of molten metal in high-melting-point metal atomizing powdering, and high in powdering efficiency; a cooling assembly is capable of efficiently cooling plasma atomized droplets, so that the uniformity and stability of the metal atomizing powder are improved; the metal atomizing powder can be micronized into nanometer powder; and the micronized metal powder can be efficiently separated througha high-speed turbine separator.

Description

[0001] The invention relates to a powder metallurgy equipment, in particular to a plasma atomization powder making equipment suitable for high melting point metals. Background technique [0002] In recent years, "3D printing" and other additive manufacturing methods have attracted people's attention. It can directly produce metal products without forging, turning, milling, planing and grinding, which greatly reduces energy consumption and saves materials. The metal injection molding method, selective laser melting method and selective laser sintering method are all additive manufacturing methods, which are suitable for the production of powder metallurgy small parts with complex shapes. These methods have high requirements on the morphology, particle size distribution, oxygen content, etc. of the metal powder, and the metal powder produced by the gas atomization method can meet these requirements. Due to the specific reaction conditions of gas atomization powder production, th...

AI Technical Summary

Problems solved by technology

However, the temperature of the melt in the draft pipe assembly of the tower-type metal atomization plasma generator will gradually drop during the process of flowing down, which will affect the fluidity of the melt, resulting in a low melt delivery speed and even condensation of the molten metal. The guide tube is blocked on the wall of the guide tube, thereby reducing the efficiency of metal atomization and pulverization

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