Gas atomization powder making nozzle device

Abstract

The invention relates to a gas atomization powder manufacturing nozzle device which comprises a melt chamber, a gas source chamber and an atomizing nozzle, a metal solution is slowly poured into the melt chamber and flows out from a metal solution outlet, a gas inlet in the top of the gas source chamber is connected with a gas source, high-speed gas enters from the gas inlet and is sprayed out from a gas outlet, and in the process, the atomizing nozzle is sprayed out from the gas source chamber. The high-speed air flow acts on the metal solution to effectively crush the metal solution for the first time to crush the metal solution into fine flaky melts; then, the flaky melts enter the circulating holes, high-speed gas enters from a gas source inlet and is sprayed out from a gas source outlet, and metal melt particles are further refined; and through the high-speed air flow of the air source outlet and the specific atomization technology, the flaky melt is strongly sheared and impacted again, so that secondary atomization is realized, uniform and fine metal particles are finally obtained, and the metal atomization efficiency is improved.

Description

Technical Field

[0001] The invention relates to a metal powder making device, in particular to an aerosolized powder making nozzle device. Background Art

[0002] Metal powder is an important metal raw material in the fields of thermal spraying, powder metallurgy, 3D printing, etc. At present, the most widely used powder preparation method in industrial production is vacuum gas atomization powder preparation. The alloy powder prepared by this method has the advantages of high purity, high sphericity, and low oxygen content; however, there are still problems such as low atomization efficiency and insufficient powder particle size in the gas atomization powder preparation process; currently, there is a similar technical solution that uses high water flow to impact metal melt to form metal powder; this method can prepare metal powder to a certain extent, but there are some problems, such as the sphericity of the powder, the degree of oxidation of the powder, etc.

[0003] In summary, how to improve the atomization efficiency of metals and obtain metal powders with smaller particle sizes has become an urgent problem that researchers in this field need to solve. Summary of the invention

[0004] The technical problem to be solved by the present invention is: how to improve the atomization efficiency of metal and obtain metal powder with smaller particle size;

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] The present invention is an aerosol powder making nozzle device, comprising: a melt chamber, wherein the melt chamber has a metal liquid containing cavity with an opening facing upward, and a metal liquid outlet is provided at the bottom; a gas source chamber arranged in the melt chamber, wherein the top of the melt chamber has an air inlet, and the bottom of the melt chamber has an air outlet, wherein the air outlet is coaxially arranged with the metal liquid outlet, and a gap is formed between the air outlet and the metal liquid outlet; an atomizing nozzle arranged outside the melt chamber, wherein the center of the atomizing nozzle has a flow hole through it, wherein the flow hole is coaxially arranged with the metal liquid outlet, the atomizing nozzle has an air source inlet, and an annular structure is provided at the flow hole, and the air source outlet is obliquely downward;

[0007] In this scheme, the molten metal is slowly poured into the melt chamber, and the molten metal flows out from the molten metal outlet. At the same time, the air inlet at the top of the air source chamber is connected to the air source, and high-speed gas enters from the air inlet and is ejected from the air outlet. In this process, the high-speed airflow acts on the molten metal, effectively breaking the molten metal for the first time and breaking it into fine flake melts.

[0008] Subsequently, these flake melts enter the flow holes, and high-speed gas enters from the gas source inlet and is ejected from the gas source outlet to further refine the metal melt particles. Through the high-speed airflow at the gas source outlet and the specific atomization technology, the flake melt is again subjected to strong shearing and impact, thereby achieving a second atomization, and finally obtaining uniform and fine metal particles, which improves the atomization efficiency of the metal.

[0009] The gas source outlet is arranged obliquely downward so that the metal particles finally obtained move downward.

[0010] In order to illustrate how the gas source chamber and the melt chamber are connected, the present invention adopts that the inner wall of the melt chamber and the inner wall of the gas source chamber are connected by a connecting rod;

[0011] The gas source chamber and the melt chamber are connected via a connecting rod.

[0012] In order to explain how the melt chamber and the atomizing nozzle are connected, the present invention adopts that the outer wall of the melt chamber and the inner wall of the atomizing nozzle are connected by a threaded pair;

[0013] The connection between the melt chamber and the atomizing nozzle is achieved through the cooperation of internal and external threads.

[0014] In order to enable the metal solution to flow out from the metal solution outlet, the present invention adopts that the metal solution chamber is provided with a tapered surface inclined downward near the metal solution outlet;

[0015] The conical surface plays a guiding role, and the molten metal can flow out from the molten metal outlet through the guidance of the conical surface.

[0016] In order to prevent the molten metal from being affected by the airflow and flowing back from the molten metal outlet, the bottom of the air outlet is lower than the bottom of the molten metal outlet in the present invention;

[0017] In this way, the air flow at the outlet is sprayed downward, and the bottom of the molten metal outlet is higher than the bottom of the outlet, which can avoid the backflow of the molten metal.

[0018] In order to achieve the sequential impact crushing of the molten metal, the present invention adopts that the gas source outlet is lower than the gas outlet;

[0019] In this way, the gas source outlet is lower than the gas outlet and lower than the metal liquid outlet, so that the metal liquid can be impacted once by the high-speed gas at the gas outlet and then impacted twice by the high-speed gas at the gas source outlet, thereby achieving the impact and crushing of the metal liquid in sequence, thereby obtaining smaller metal particle powder.

[0020] It should be noted that before using the device, ensure that the gas flow rate at the gas outlet and the gas source outlet is stable; this step is crucial, as it lays a solid foundation for the subsequent metal atomization process and ensures the uniformity and efficiency of the atomization.

[0021] The beneficial effects of the present invention are as follows: the present invention is an aerosol powder making nozzle device, in which a molten metal is slowly poured into a melt chamber, and the molten metal flows out from a molten metal outlet. At the same time, an air inlet at the top of the gas source chamber is connected to a gas source, and high-speed gas enters from the air inlet and is ejected from the air outlet. In this process, the high-speed airflow acts on the molten metal, and the molten metal is effectively crushed for the first time, breaking it into fine flake melts; subsequently, these flake melts enter the flow holes, and high-speed gas enters from the gas source inlet and is ejected from the gas source outlet, further refining the molten metal particles; through the high-speed airflow at the gas source outlet and a specific atomization technology, the flake melt is subjected to strong shearing and impacting effects again, thereby realizing a second atomization, and finally obtaining uniform and fine metal particles, thereby improving the atomization efficiency of the metal. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 is a cross-sectional view of the present invention;

[0025] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0026] In the figure: 1-melt chamber, 11-metal liquid cavity, 12-metal liquid outlet, 13-conical surface, 2-gas source chamber, 21-gas inlet, 22-gas outlet, 3-atomizing nozzle, 31-flow hole, 32-gas source inlet, 33-gas source outlet, 4-connecting rod, 5-thread pair. DETAILED DESCRIPTION

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0028] like Figure 1-3 As shown, the present invention is an aerosol powder making nozzle device, comprising: a melt chamber 1, wherein there is a metal liquid cavity 11 with an upward opening, and a metal liquid outlet 12 is provided at the bottom thereof; a gas source chamber 2 arranged in the melt chamber 1, wherein a gas inlet 21 is provided at the top thereof, and a gas outlet 22 is provided at the bottom thereof, wherein the gas outlet 22 is coaxially arranged with the metal liquid outlet 12, and a gap is formed between the gas outlet 22 and the metal liquid outlet 12; an atomizing nozzle 3 arranged outside the melt chamber 1, wherein a flow hole 31 is provided through the middle thereof, wherein the flow hole 31 is coaxially arranged with the metal liquid outlet 12, and the atomizing nozzle 3 is provided with a gas source inlet 32, wherein the flow hole 31 is provided with an annular structure, and a gas source outlet 33 is obliquely downward;

[0029] In this solution, the molten metal is slowly poured into the melt chamber 1, and the molten metal flows out from the molten metal outlet 12. At the same time, the air inlet 21 at the top of the air source chamber 2 is connected to the air source, and high-speed gas enters from the air inlet 21 and is ejected from the air outlet 22. In this process, the high-speed airflow acts on the molten metal, effectively breaking the molten metal into small flake melts for the first time.

[0030] Subsequently, these flake melts enter the flow hole 31, and high-speed gas enters from the gas source inlet 32 ​​and is ejected from the gas source outlet 33 to further refine the metal melt particles; through the high-speed airflow at the gas source outlet 33 and the specific atomization technology, the flake melt is again subjected to strong shearing and impact, thereby achieving a second atomization, and finally obtaining uniform and fine metal particles, thereby improving the atomization efficiency of the metal.

[0031] The gas source outlet 33 is arranged obliquely downward so that the metal particles finally obtained move downward.

[0032] like Figure 1-2 As shown, in order to illustrate how the gas source chamber and the melt chamber are connected, the present invention adopts that the inner wall of the melt chamber 1 and the outer wall of the gas source chamber 2 are connected by a connecting rod 4;

[0033] The gas source chamber 2 and the melt chamber 1 are connected via a connecting rod 4 .

[0034] like Figure 2 As shown, in order to illustrate how the melt chamber and the atomizing nozzle are connected, the present invention adopts that the outer wall of the melt chamber 1 and the inner wall of the atomizing nozzle 3 are connected through a thread pair 5;

[0035] The connection between the melt chamber 1 and the atomizing nozzle 3 is achieved by the cooperation of the internal and external threads.

[0036] like Figure 2 As shown, in order to enable the metal solution to flow out from the metal solution outlet, the present invention adopts a downwardly inclined conical surface 13 at the metal solution chamber 11 near the metal solution outlet 12;

[0037] The conical surface 13 plays a guiding role, and the molten metal can be guided by the conical surface 13 to flow out from the molten metal outlet 12 .

[0038] like Figure 2-3 As shown, in order to prevent the molten metal from being affected by the airflow and flowing back from the molten metal outlet 12, the present invention adopts that the bottom of the gas outlet 22 is lower than the bottom of the molten metal outlet 12;

[0039] In this way, the airflow at the outlet is sprayed downward, and the bottom of the molten metal outlet 12 is higher than the bottom of the outlet 22, so that the backflow of the molten metal can be avoided.

[0040] like Figure 2-3 As shown, in order to achieve the sequential impact crushing of the molten metal, the present invention adopts that the gas source outlet 33 is lower than the gas outlet 22;

[0041] In this way, the gas source outlet 33 is lower than the gas outlet 22 and lower than the metal liquid outlet 12, so that the metal liquid can be impacted once by the high-speed gas from the gas outlet 22, and then impacted twice by the high-speed gas from the gas source outlet 33, thereby achieving the impact and crushing of the metal liquid in sequence, thereby obtaining smaller metal particle powder.

[0042] It should be noted that before using the device, the gas flow rate at the gas outlet 22 and the gas source outlet 33 must be stable; this step is crucial as it lays a solid foundation for the subsequent metal atomization process and ensures the uniformity and efficiency of the atomization.

[0043] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An aerosol powder making nozzle device, characterized in that: include: A melt chamber (1) having a molten metal chamber (11) with an upward opening and a molten metal outlet (12) at the bottom; An air source chamber (2) disposed in the melt chamber (1), having an air inlet (21) at the top and an air outlet (22) at the bottom, wherein the air outlet (22) is coaxially disposed with the molten metal outlet (12), and a gap is formed between the air outlet (22) and the molten metal outlet (12); An atomizing nozzle (3) is arranged outside the melt chamber (1), and a circulation hole (31) is arranged through the center thereof. The circulation hole (31) is arranged coaxially with the molten metal outlet (12). An air source inlet (32) is opened on the outer peripheral wall of the atomizing nozzle (3), and an annular structure is arranged at the circulation hole (31), and an air source outlet (33) is obliquely downward.

2. The aerosol powder making nozzle device according to claim 1, characterized in that: The inner wall of the melt chamber (1) and the outer wall of the gas source chamber (2) are connected via a connecting rod (4).

3. The aerosol powder making nozzle device according to claim 1, characterized in that: The outer wall of the melt chamber (1) and the inner wall of the atomizing nozzle (3) are connected via a threaded pair (5).

4. The aerosol powder making nozzle device according to claim 1, characterized in that: The molten metal chamber (11) is provided with a tapered surface (13) inclined downward near the molten metal outlet (12).

5. The aerosol powder making nozzle device according to claim 1, characterized in that: The bottom of the gas outlet (22) is lower than the bottom of the molten metal outlet (12).

6. The aerosol powder making nozzle device according to claim 5, characterized in that: The gas source outlet (33) is lower than the gas outlet (22).

Images