Double-layer gas atomizing nozzle suitable for field of metal powder preparation

An atomization nozzle and gas atomization technology, which is applied in the field of gas atomization to prepare metal powder and metal powder preparation, can solve the problem of increasing the particle size of metal powder, affecting the flow shape of metal liquid flow and the jet field at the nozzle outlet, and affecting the metal powder Product quality and other issues, to achieve the effect of enhancing applicability, improving energy utilization rate, and simple structure

CN109894623AInactive Publication Date: 2019-06-18BEIHANG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2019-06-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a double-layer gas atomizing nozzle suitable for the field of metal powder preparation. The double-layer gas atomizing nozzle mainly comprises a straight air inlet, an upper atomizing nozzle, a liquid guiding pipe and a lower atomizing nozzle; during the atomization process of the metal powder, the upper nozzle and the lower nozzle are used for atomizing the molten metal flowing out of the liquid guide pipe at the same time, the lower-layer nozzle provides high-speed jet flow for melt-liquid atomization, the upper-layer nozzle is used for preventing backflow generatedby atomization of the lower-layer nozzle, and providing an appropriate outlet suction negative pressure for the outlet of the diversion pipe. The double-layer gas atomizing nozzle solves the problem of obstruction of metal melt flow in a traditional restricted nozzle reflux area and has the characteristics of being simple in structure, convenient to adjust and high in reliability.
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Description

technical field

[0001] The invention relates to the technical field of metal powder preparation, in particular to the technical field of gas atomization to prepare metal powder. Background technique

[0002] Metal powder is an important basic industrial raw material, widely used in high-tech fields such as automobile, metallurgy, national defense, electronics, chemical industry, medicine and biology, environmental protection, home appliances, aerospace, nuclear industry, etc. Among them, the preparation of fine metal powder and its subsequent deep processing technology have attracted more and more attention from developed countries in the world with the rapid development of high technology in the world.

[0003] Compared with other powder making methods, the atomization method has high productivity and relatively simple equipment. It is one of the main metal powder preparation methods. The powder produced by the atomization method has accounted for about 50% of the total pow...

Examples

Embodiment Construction

[0021] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] figure 1 It is a cross-sectional view of a double-layer gas atomization nozzle of the present invention, in figure 1 The Nakamoto atomizing nozzle is mainly composed of straight air inlets 1 and 5, the upper layer atomizing nozzle 2, the guide tube 4, and the lower layer atomizing nozzle 6. When atomization starts, the gas source is directed to air inlets 1 and 5, and the air in the atomization chamber is evacuated to provide inert gas protection for the molten metal; secondly, the molten metal is poured from the guide tube 4 to protect the molten metal. The gas is ejected from the outlet 3 of the jet annular seam of the atomizing nozzle 2 on the upper layer. Unde...