A high-pressure water atomizing nozzle

Abstract

The invention discloses a high-pressure water atomizing nozzle, which comprises a sleeve and a nozzle core. An annular groove is arranged on the outer wall of the nozzle core, and two rings of inner and outer water spray holes are arranged on the lower bottom surface of the annular groove. It is streamlined, and its axis forms an angle of 12° to 22° with the axis of the nozzle core. The water outlet of the water spray hole faces the axis of the nozzle core; the sleeve and the nozzle core form a closed annular space with the water spray hole. In the present invention, two converging points with different heights will be formed on the axis of the nozzle core when the nozzle is jetting, and the negative pressure area formed by the water column of the jet will increase, and the suction effect on the molten metal will be enhanced, ensuring that the molten metal is It enters the atomization area at a uniform speed and stably, which improves the stability and continuity of the atomization process. This jet form can crush the metal solution to the maximum and quickly condense it into metal powder, which improves the atomization efficiency of the nozzle and the product. fine powder rate. At the same time, the nozzle involved in the present invention also has the effects of reducing jet flow resistance and saving energy.

Description

technical field [0001] The invention relates to the technical field of hydraulic atomization metal powder preparation, in particular to a high-pressure water atomization nozzle. Background technique [0002] In the production of powder by atomization, water atomization is one of the main production methods. On the one hand, because the atomization medium water is cheap and easy to obtain, on the other hand, from the perspective of atomization efficiency, the water atomization method performs better. [0003] In addition, compared with air atomization powder making, since the specific heat capacity of water is much greater than that of compressed air, the broken metal droplets can be solidified into dendritic metal powder more quickly during the water atomization process. The powder prepared by the method has small particle size, large specific surface area, low powder oxidation rate and good activity. [0004] In the water atomization pulverization process, the high-pressu...

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Problems solved by technology

[0010] In the prior art, the fine powder rate of the metal powder produced by the ring-hole high-pressure water atomizing nozzle and the combined high-pressure water atomizing nozzle is low. Usually, the fine powder rate of 60 mesh can only reach about 60%, and the metal powder of 30 mesh to 60 mesh Powder accounts for about 35%

In addition, in the actual production of the high-pressure water atomizing nozzles in the prior art, the metal liquid often sprays back, thereby clogging the nozzles and interrupting the production, which seriously affects the product quality and production efficiency

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