Gas atomization pulverization tundish crucible

Abstract

The utility model discloses a gas atomization pulverization tundish crucible which is formed by combining a crucible upper end and a crucible lower end, the crucible upper end is provided with a liquid collecting cavity, the bottom of the crucible upper end is provided with a flow dividing structure, the lower end of the flow dividing structure is provided with flow dividing holes, and the lower end of the crucible is provided with a confluence cavity and a liquid outlet hole. The tundish crucible for the gas atomization powder making is developed by combining the current situation of the existing gas atomization powder making process, and not only has a certain filtering effect on dregs, but also can prevent the phenomenon of tundish blockage, so that the production efficiency of the gas atomization powder making process is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas atomization powder making, and particularly relates to an intermediate ladle crucible for gas atomization powder making. Background Art

[0002] As the most important preparation technology for metal powders used in additive manufacturing at present, the gas atomization powder making technology has many advantages such as simple process, high production efficiency, wide application range, high powder sphericity, and controllable particle size. However, in production, the metal melt often contains some impurities, such as metal oxides, refractory dross, etc. These dross not only affect the product quality, but also seriously block the flow guide pipe, causing the problem of blocked ladle, which leads to the failure of the atomization process for this furnace, greatly reducing the production efficiency.

[0003] The Chinese utility model patent with the patent number CN217798952U discloses a slag filtering structure for the heat preservation crucible of a gas atomization powder making device, including: an insulating pressure ring arranged at the upper opening of the heat preservation crucible, and an insulating connecting rod hanging down at the inner edge of the insulating pressure ring; several groups of symmetric fixing blocks are arranged on the insulating connecting rod to form a bearing part for placing multi - stage filter sheets layer by layer; and the last - stage filter sheet is placed at the upper opening of the flow guide pipe. After the metal melt passes through the multi - stage filter sheets, it enters the atomizer through the last - stage filter sheet and the flow guide pipe.

[0004] The above - mentioned technology uses multi - stage filtration, and it is very difficult for slag to reach the flow guide pipe. However, in the later stage of atomization, due to the decrease in the temperature of the metal melt, the fluidity becomes poor, and the bottom of the crucible at the position of the last - stage filter sheet is too flat, which is not conducive to the outflow of the melt in the later stage of atomization. At the same time, if slag accumulates at the last - stage filter sheet at the upper opening of the flow guide pipe, it is easy to cause the ladle itself to be blocked. Summary of the Invention

[0005] The purpose of the utility model is to provide an intermediate ladle crucible for gas atomization powder making that can not only filter slag to a certain extent but also prevent the occurrence of blocked ladle phenomenon.

[0006] The technical scheme adopted by the utility model is as follows:

[0007] An intermediate ladle crucible for gas atomization powder making is composed of an upper crucible end and a lower crucible end. A liquid collecting cavity is arranged at the upper end of the crucible, a flow - dividing structure is arranged at the bottom of the upper end of the crucible, a flow - dividing hole is arranged at the lower end of the flow - dividing structure, and a confluence cavity and a liquid outlet hole are arranged at the lower end of the crucible.

[0008] Preferably, the upper crucible end and the lower crucible end are connected in a nested manner.

[0009] Preferably, the flow - dividing structure is composed of a circular flow - dividing unit and four fan - shaped ring flow - dividing units.

[0010] Preferably, the shunt holes include a circular hole and four fan-shaped annular holes.

[0011] Preferably, the passing rate of each shunt hole is less than that of the liquid outlet hole.

[0012] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0013] The setting of the single-layer multi-unit shunt structure can not only play a certain filtering role, but also when a certain shunt hole is blocked by dross, other shunt structures and shunt holes can still work, preventing the occurrence of the phenomenon of blocked packets caused by the poor fluidity of the molten liquid in the later stage of atomization, and ensuring the smooth progress of the atomization process of this furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a front view of the upper end of the crucible;

[0016] Figure 3 is a left view of the upper end of the crucible;

[0017] Figure 4 is a top view of the upper end of the crucible;

[0018] Figure 5 is a front view of the lower end of the crucible;

[0019] Figure 6 is a left view of the lower end of the crucible;

[0020] Figure 7 is a top view of the lower end of the crucible.

[0021] In the figure: the upper end of the crucible 1, the liquid collecting cavity 2, the shunt structure 3, the shunt holes 4, the lower end of the crucible 5, the confluence cavity 6, the liquid outlet hole 7. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the purpose, technical solutions and advantages of the present utility model more clear and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0023] As Figures 1-7 shown, an intermediate ladle crucible for gas atomization powder making is composed of an upper end 1 and a lower end 5 of the crucible. The upper end 1 of the crucible is provided with a liquid collecting cavity 2, the bottom of the upper end 1 of the crucible is provided with a shunt structure 3, the lower end of the shunt structure 3 is provided with a shunt hole 4, and the lower end 5 of the crucible is provided with a confluence cavity 6 and a liquid outlet hole 7. The purpose of each shunt structure 3 corresponding to a shunt hole 4 is that when a shunt hole 4 is blocked by dross or the outflow speed becomes slow due to the falling of dross, other shunt structures 3 and shunt holes 4 can work normally to prevent the occurrence of blocked packets.

[0024] In this embodiment, the device is made of alumina. The upper end 1 and the lower end 5 of the crucible are connected in a nested manner, which not only ensures the connection strength but also facilitates disassembly. Since the lower end 5 of the crucible needs to be bonded to the flow guide tube (not shown in the figure) using a high-temperature binder, the lower end 5 of the crucible is a disposable product. However, if there are no cracks or other damages after the upper end 1 of the crucible is used, it can be reused after cleaning the residue on the inner wall, saving some resources.

[0025] In this embodiment, the flow splitting structure 3 is composed of a circular flow splitting unit and four fan-shaped ring flow splitting units. Each flow splitting unit has a flow guiding structure to facilitate the downward flow of the molten metal.

[0026] In this embodiment, the flow splitting holes 4 include a circular hole and four fan-shaped ring holes. Each flow splitting hole 4 is provided at the bottom of each flow splitting unit.

[0027] In this embodiment, the passing rate of each flow splitting hole 4 is less than that of the liquid outlet hole 7, so as to ensure that larger slag will be left at the upper end 1 of the crucible. Even if some slag enters the lower end 5 of the crucible, it is relatively small and will not block the liquid outlet 7 and the flow guide tube (not shown in the figure) connected thereto.

[0028] The above is only a preferred embodiment of the present utility model and is not used to limit the present utility model. For those skilled in the art, the present utility model can be changed and varied. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An intermediate ladle crucible for gas atomization powder making, characterized in that: It is composed of the upper end (1) and the lower end (5) of the crucible. The upper end (1) of the crucible is provided with a liquid collecting cavity (2), and a flow dividing structure (3) is provided at the bottom of the upper end (1) of the crucible. The flow dividing structure (3) is composed of a circular flow dividing unit and four sector-shaped ring flow dividing units. A flow dividing hole (4) is provided at the lower end of the flow dividing structure (3). The lower end (5) of the crucible is provided with a confluence cavity (6) and a liquid outlet hole (7).

2. The tundish crucible for gas atomization powder making according to claim 1, characterized in that: The upper end (1) and the lower end (5) of the crucible are connected in a nested manner.

3. The tundish crucible for gas atomization powder making according to claim 1, characterized in that: The flow dividing hole (4) includes a circular hole and four sector-shaped ring holes.

4. A tundish crucible for gas atomization powder making according to claim 1, characterized in that: The passing rate of each flow dividing hole (4) is less than the passing rate of the liquid outlet hole (7).

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