Argon protection device for alloy smelting furnace mouth

Abstract

The argon protection device for the alloy smelting furnace mouth comprises an annular gas outlet round pipe, a transition gas pipe and a ventilation hose, an argon inlet and a receding notch facilitating material pouring of a furnace body are formed in the two opposite ends of the annular gas outlet round pipe in the circumferential direction respectively, and the argon inlet is located in the side wall of the centrifugal side of the annular gas outlet round pipe. A plurality of argon gas outlets are sequentially formed in the side wall of the centripetal side of the annular gas outlet round pipe in the annular direction, two ports, located at the receding notch, of the annular gas outlet round pipe are in a closed state, one end of the transition gas pipe is communicated with the argon gas inlet, and the ventilation hose is communicated with the other end of the transition gas pipe. The argon protection device for the alloy smelting furnace mouth can be flexibly and conveniently connected with various argon sources, argon can be uniformly and continuously introduced along the furnace mouth, the function of isolating air is realized at low cost, a large amount of nitrogen in the air is effectively prevented from entering the furnace, and meanwhile, the pouring of molten steel after smelting is not influenced.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal smelting, in particular to an argon gas protection device for an alloy smelting furnace mouth. Background Art

[0002] At present, since some alloy steel grades need to control nitrogen during the smelting process, argon gas needs to be introduced into the furnace mouth for air isolation protection and control during the whole smelting process to prevent a large amount of nitrogen in the air from entering the molten steel and causing nitrogen increase.

[0003] The existing argon protection device generally passes a large amount of argon in one direction of the furnace mouth, which easily causes argon waste. At the same time, it is difficult to flexibly and conveniently connect various argon gas sources, which is inconvenient to use. Therefore, how to economically and conveniently pass argon into the furnace mouth for protection has become a problem that needs to be solved. Utility Model Content

[0004] In view of the above technical problems, the utility model provides an argon protection device for an alloy smelting furnace mouth, which is used to solve the problem of how to economically and conveniently introduce argon into the furnace mouth for protection.

[0005] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] An argon protection device for an alloy smelting furnace mouth comprises an annular gas outlet pipe, a transition gas pipe and a ventilation hose, wherein an argon gas inlet and a clearance gap for facilitating furnace dumping are respectively provided at two opposite ends of the annular gas outlet pipe in the circumferential direction, the argon gas inlet is located on the side wall on the centrifugal side of the annular gas outlet pipe, and a plurality of argon gas outlets are sequentially provided on the side wall on the centripetal side of the annular gas outlet pipe along the annular direction, wherein two ports on the annular gas outlet pipe at the clearance gap are in a closed state, one end of the transition gas pipe is connected to the argon gas inlet, and the ventilation hose is connected to the other end of the transition gas pipe.

[0007] Optionally, a plurality of argon gas outlets are evenly distributed on the side wall of the annular gas outlet circular tube on the centripetal side.

[0008] Optionally, the central axis of each argon gas outlet intersects with the center of the annular gas outlet circular tube, and is located on the transverse symmetry plane of the annular gas outlet circular tube.

[0009] Optionally, two ports on the annular gas outlet circular tube located at the clearance gap are symmetrically located on both sides of the argon gas inlet.

[0010] Optionally, the transition air pipe is a straight round pipe.

[0011] Optionally, one end of the transition air pipe is vertically connected to the annular air outlet circular pipe toward the center of the annular air outlet circular pipe. Optionally, the annular air outlet circular pipe and the transition air pipe are connected by welding.

[0012] Optionally, the ventilation hose is detachably connected to the other end of the transition air pipe.

[0013] Preferably, the other end of the transition air duct is tapered.

[0014] Compared with the prior art, the alloy smelting furnace mouth argon protection device of the utility model can be flexibly and conveniently connected to various argon gas sources, and can evenly and continuously introduce argon along the furnace mouth, thereby realizing the function of isolating air at a low cost, effectively preventing nitrogen in the air from entering the furnace in large quantities, and at the same time not affecting the pouring of molten steel after smelting. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an argon gas protection device for an alloy smelting furnace mouth in one embodiment of the utility model at one viewing angle;

[0016] Figure 2 It is a schematic structural diagram of an argon gas protection device for an alloy smelting furnace mouth in another perspective according to an embodiment of the utility model. DETAILED DESCRIPTION

[0017] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the present invention is described in detail below with reference to the embodiments.

[0018] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0019] Please refer to Figure 1 and Figure 2 , an argon protection device 100 for an alloy smelting furnace mouth, comprising an annular gas outlet round pipe 1, a transition gas pipe 2 and a ventilation hose 3.

[0020] The two opposite ends of the annular gas outlet pipe 1 are respectively provided with an argon gas inlet 11 and a clearance gap 12 for convenient furnace dumping. The argon gas inlet 11 is located on the side wall of the centrifugal side of the annular gas outlet pipe 1.

[0021] A plurality of argon gas outlets 13 are sequentially provided on the centripetal side wall of the annular gas outlet circular tube 1 along the annular direction, wherein two ports located at the clearance gap 12 on the annular gas outlet circular tube 1 are in a closed state.

[0022] One end of the transition gas pipe 2 is connected to the argon gas inlet 11 .

[0023] The ventilation hose 3 is connected to the other end of the transition gas pipe 2. This makes it easy to connect various argon gas sources.

[0024] Optionally, a plurality of argon gas outlets 13 are evenly distributed on the side wall of the annular gas outlet circular tube 1 on the centripetal side. This arrangement facilitates balanced gas outlet in the annular direction.

[0025] Optionally, the central axis of each argon outlet 13 intersects with the center of the annular outlet tube 1 and is located on the transverse symmetry plane A of the annular outlet tube 1. This arrangement makes the argon outlet smoother.

[0026] Optionally, the two ports located at the gap 12 on the annular gas outlet circular tube 1 are symmetrically located on both sides of the argon gas inlet 11. This arrangement makes the argon gas inlet and outlet more balanced.

[0027] Optionally, the transition gas pipe 2 is a straight round pipe, which is convenient for processing and facilitates smooth flow of argon gas.

[0028] Optionally, one end of the transition air pipe 2 is vertically connected to the annular gas outlet circular pipe 1 toward the center of the annular gas outlet circular pipe 1. In this way, the argon gas can enter the annular gas outlet circular pipe more smoothly.

[0029] Optionally, the annular air outlet circular pipe 1 and the transition air pipe 2 are connected by welding, which is convenient for connection and has good air tightness.

[0030] Optionally, the ventilation hose 3 is detachably connected to the other end of the transition air pipe 2. This arrangement facilitates the replacement of ventilation hoses of different specifications to connect to different air sources.

[0031] Preferably, the other end of the transition air pipe 2 is tapered, which facilitates the insertion and removal of the ventilation hose.

[0032] The use principle of the alloy smelting furnace mouth argon protection device 100 according to one embodiment of the utility model is as follows:

[0033] When in use, the annular air outlet tube 1 is placed at the furnace mouth so that the gap 12 avoids the position where the furnace body is dumped, and the ventilation hose 3 is connected to the gas source (such as an argon gas bottle) to introduce argon gas. At this time, the argon gas passes through the ventilation hose 3 and the transition gas pipe 2 in turn and enters the argon gas inlet 11, and then continuously discharges from multiple argon gas outlets 13, thereby isolating a large amount of air above the furnace mouth from entering the furnace.

[0034] The utility model discloses an argon protection device for alloy smelting furnace mouth, which can be flexibly and conveniently connected to various argon gas sources, and can evenly and continuously introduce argon gas along the furnace mouth, thereby realizing the function of isolating air at a low cost, effectively preventing nitrogen in the air from entering the furnace in large quantities, and at the same time does not affect the pouring of molten steel after smelting.

[0035] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any changes and modifications made without departing from the spirit and scope of the present invention are within the scope of patent protection of the present invention.

Claims

1. An argon protection device for alloy smelting furnace mouth, characterized in that: It includes an annular air outlet pipe, a transition air pipe and a ventilation hose; The two opposite ends of the annular gas outlet tube are respectively provided with an argon gas inlet and a clearance gap for facilitating the unloading of the furnace body. The argon gas inlet is located on the side wall of the centrifugal side of the annular gas outlet tube. A plurality of argon gas outlets are sequentially provided on the centripetal side wall of the annular gas outlet tube along the annular direction, wherein the two ports on the annular gas outlet tube located at the gap are in a closed state; One end of the transition gas pipe is connected to the argon gas inlet; The ventilation hose is connected to the other end of the transition air pipe.

2. The argon protection device for alloy smelting furnace mouth according to claim 1, characterized in that: The plurality of argon gas outlets are evenly distributed on the side wall of the annular gas outlet tube on the centripetal side.

3. The argon protection device for alloy smelting furnace mouth according to claim 1, characterized in that: The central axis of each argon gas outlet intersects at the center of the ring and is located on the transverse symmetry plane of the annular gas outlet tube.

4. The argon protection device for alloy smelting furnace mouth according to claim 1, characterized in that: The two ports on the annular gas outlet pipe, which are located at the clearance gap, are symmetrically located on both sides of the argon gas inlet.

5. The argon protection device for alloy smelting furnace mouth according to claim 1, characterized in that: The transition air pipe is a straight circular pipe.

6. The argon protection device for alloy smelting furnace mouth according to claim 1, characterized in that: One end of the transition air pipe is vertically connected to the annular air outlet circular pipe toward the center of the annular air outlet circular pipe.

7. The argon protection device for alloy smelting furnace mouth according to claim 1, characterized in that: The annular air outlet pipe and the transition air pipe are connected by welding.

8. The argon protection device for alloy smelting furnace mouth according to claim 1, characterized in that: The ventilation hose is detachably connected to the other end of the transition air pipe.

9. The argon protection device for alloy smelting furnace mouth according to claim 8, characterized in that: The other end of the transition air duct is tapered.

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