Pouring argon protection structure for producing ultra-pure steel

Abstract

The utility model discloses a pouring argon protection structure for producing ultra-pure steel, which comprises a water gap body, a molten steel channel is arranged in the water gap body, the molten steel channel is arranged along the length direction of the water gap body, and the two ends of the water gap body are observed; the sealing unit is arranged at one end of the water gap body, and the sealing unit is used for sealing the end part of the water gap body; the gas injection unit is arranged on the water gap body, and gas can be introduced into the water gap body through the gas injection unit; the gas injection unit comprises a gas channel, a gas inlet hole and a gas outlet hole, the gas channel is arranged in the nozzle body and extends in the direction of the nozzle body, the first end of the gas inlet hole is arranged on the outer wall of the nozzle body, the second end of the gas inlet hole is communicated with the gas channel, and the first end of the gas outlet hole is communicated with the gas channel. The second end of the air outlet communicates with the molten steel channel. According to the utility model, the gas injection unit is arranged, so that argon can be uniformly distributed in the molten steel channel.

Description

Technical Field

[0001] The utility model relates to the technical field of steel smelting, in particular to a pouring argon protection structure for producing ultra-pure steel. Background Art

[0002] The ladle shroud is used between the ladle and the tundish to protect the molten steel from secondary oxidation and prevent the steel flow from splashing. Otherwise, cracking, breaking and other accidents are prone to occur during pouring. It has strong adaptability to steel types and good corrosion resistance. When in use, it is necessary to blow inert gas such as argon into the ladle shroud to exhaust the air in the ladle shroud to prevent oxidation of the molten steel.

[0003] In the prior art, the patent document with application number: CN202021877223.3 discloses an inert gas blowing structure for a large ladle long shroud used in steelmaking, comprising a shroud inner layer and a shroud outer layer, the outer ring of the shroud inner layer is provided with a shroud outer layer, a first annular box is fixed to the upper part of the shroud outer layer, a first blowing joint is connected to the side wall of the first annular box, a breathable layer is circumferentially provided on the upper side of the shroud inner layer, a blowing hole is provided between the first annular box and the shroud outer layer, and an overflow zone is provided between the blowing hole and the breathable layer. The beneficial effect of the utility model is that inert gas such as argon can be input from the upper part of the large ladle long shroud, and the air at the upper end of the large ladle long shroud can be emptied.

[0004] However, the existing inert gas blowing structure of the large ladle long nozzle is only provided with blowing holes on the upper part of the outer layer of the nozzle, and the inert gas cannot be fully and evenly distributed inside the entire nozzle, thereby affecting its protective effect and causing the purity of the manufactured steel to decrease. Therefore, it is necessary to improve such a structure to overcome the above defects. Utility Model Content

[0005] The purpose of the utility model is to provide a casting argon protection structure for producing ultra-pure steel, which is used to solve the problem that the existing large-scale long nozzle inert gas blowing structure is only provided with blowing holes on the upper part of the outer layer of the nozzle, resulting in the inert gas being unable to be fully and evenly distributed inside the entire nozzle, thereby affecting its protection effect.

[0006] The above technical objectives of the utility model are achieved by using the following technical solutions:

[0007] A pouring argon protection structure for producing ultra-pure steel, comprising:

[0008] The nozzle body has a molten steel channel in it, which is arranged along the length direction of the nozzle body and is observed at both ends of the nozzle body;

[0009] A sealing unit, which is arranged on one end of the nozzle body and is used to seal the end of the nozzle body;

[0010] A gas injection unit, the gas injection unit is arranged on the nozzle body, and gas can be passed into the nozzle body through the gas injection unit; the gas injection unit includes a gas channel, an air inlet and an air outlet, the gas channel is arranged in the nozzle body and extends along the direction of the nozzle body, the first end of the air inlet is arranged on the outer wall of the nozzle body, the second end of the air inlet is connected to the gas channel, the first end of the air outlet is connected to the gas channel, and the second end of the air outlet is connected to the molten steel channel, and argon can enter the molten steel channel through the air inlet, the gas channel and the air outlet.

[0011] The utility model is further configured as follows: the sealing unit comprises:

[0012] A sealing end cover is sleeved on the end of the nozzle body, and an injection port is opened on the sealing end cover, and the injection port runs through both ends of the sealing end cover;

[0013] The sealing ring is arranged on the contact surface between the sealing end cover and the nozzle body, and is used to improve the sealing between the nozzle body and the sealing end cover.

[0014] The utility model is further configured as follows: a through hole is provided on the sealing end cover, a first end of the through hole is communicated with the outside, and a second end of the through hole is communicated with the air inlet.

[0015] The utility model is further configured as follows: the sealing ring is a component made of high temperature resistant material.

[0016] The utility model is further configured as follows: a first sealing groove for accommodating a sealing ring is provided on the top surface of the nozzle body.

[0017] The utility model is further configured as follows: a second sealing groove for accommodating a sealing ring is provided on the bottom surface of the sealing end cover.

[0018] In summary, the utility model has the following beneficial effects:

[0019] 1. High sealing performance: Through the sealing unit, especially the sealing ring and the sealing groove on the nozzle body and the sealing end cover, the end of the nozzle body is tightly sealed. This design effectively prevents the leakage of molten steel during the pouring process, and also provides a closed environment for the injection of argon.

[0020] 2. Uniform argon distribution: The design of the gas injection unit enables argon to be evenly distributed in the molten steel channel. In particular, the gas outlet holes are distributed from top to bottom on the inner wall of the nozzle body, ensuring that argon can cover the molten steel in all directions, effectively reducing the contact between the molten steel and air or other impurities. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 It is a partial enlarged view of the utility model.

[0023] Numbers: nozzle body 1, molten steel channel 2, gas channel 3, air inlet 4, air outlet 5, sealing end cover 6, sealing ring 7, through hole 8 DETAILED DESCRIPTION

[0024] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with illustrations and specific embodiments.

[0025] like Figures 1 to 2 As shown, the utility model proposes a pouring argon protection structure for producing ultra-pure steel, comprising a nozzle body 1, a molten steel channel 2 is opened in the nozzle body 1, and the molten steel channel 2 is arranged along the length direction of the nozzle body 1 and observes the two ends of the nozzle body 1; a sealing unit, the sealing unit is arranged on one end of the nozzle body 1, and the sealing unit is used to seal the end of the nozzle body 1; a gas injection unit, the gas injection unit is arranged on the nozzle body 1, and the gas can be passed into the nozzle body 1 through the gas injection unit; the gas injection unit includes a gas passage The gas channel 3, the gas inlet hole 4 and the gas outlet hole 5 are arranged in the nozzle body and extend along the nozzle body direction. The first end of the gas inlet hole 4 is arranged on the outer wall of the nozzle body, the second end of the gas inlet hole 4 is connected with the gas channel 3, the first end of the gas outlet hole 5 is connected with the gas channel 3, and the second end of the gas outlet hole 5 is connected with the molten steel channel 2. Argon can enter the molten steel channel 2 through the gas inlet hole 4, the gas channel 3 and the gas outlet hole 5. The gas outlet holes 5 are distributed on the inner wall of the nozzle body from top to bottom. Argon can be evenly distributed into the molten steel channel 2 through the gas outlet hole 5.

[0026] In this embodiment, the sealing unit includes a sealing end cover 6, which is sleeved on the end of the nozzle body 1. An injection port is opened on the sealing end cover 6 to reserve space for the injection of molten steel, and the injection port runs through both ends of the sealing end cover 6; a sealing ring 7, which is arranged on the contact surface between the sealing end cover 6 and the nozzle body, and the sealing ring 7 is used to improve the sealing between the nozzle body and the sealing end cover 6.

[0027] In this embodiment, a through hole 8 is provided on the sealing end cover 6, a first end of the through hole 8 is connected to the outside, and a second end of the through hole 8 is connected to the air inlet 4. When in use, the input end of the argon source is connected to the through hole 8, so that the argon gas can easily enter the air inlet 4 from the outside through the through hole 8, and then enter the gas channel 3 and the molten steel channel 2, thereby realizing the injection of argon gas, effectively reducing the contact between the molten steel and the air or other impurities, thereby improving the quality and purity of the steel.

[0028] In this embodiment, the sealing ring 7 is a component made of high temperature resistant material. Preferably, the sealing ring 7 is made of polytetrafluoroethylene, which has good high temperature resistance and can maintain integrity for a long time in a high temperature environment.

[0029] In this embodiment, a first sealing groove for accommodating the sealing ring 7 is opened on the top surface of the water outlet body, and a second sealing groove for accommodating the sealing ring 7 is opened on the bottom surface of the sealing end cover 6. One end of the sealing ring 7 is located in the first sealing groove, and the second end of the sealing ring 7 is located in the second sealing groove. The first sealing groove and the second sealing groove limit the sealing ring 7, thereby avoiding the problem of sealing failure caused by improper installation or position displacement.

[0030] The use process and principle of the utility model are as follows: First, the sealing end cover 6 is sleeved on the end of the nozzle body 1 to ensure that the sealing ring 7 is correctly placed in the first sealing groove and the second sealing groove. Then, space is reserved for the injection of molten steel through the injection port, and the input end of the argon source is connected to the through hole 8 on the sealing end cover 6. Ensure that the connection is tight to prevent argon leakage, start the argon source, and evenly distribute the argon to the molten steel channel 2 through the air inlet 4, the gas channel 3 and the air outlet 5, and inject molten steel through the injection port. During the pouring process, monitor the flow rate and pressure of the argon to ensure that it is stably and evenly injected. If necessary, the output parameters of the argon source can be adjusted according to actual conditions. After the pouring is completed, turn off the argon source and disconnect the through hole 8. After the nozzle body 1 cools down, perform necessary cleaning and maintenance work for the next use.

[0031] In the description of the present utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the equipment or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "connection" and the like should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0032] Any details not mentioned in the above specific embodiments of the present invention belong to the known technologies in the art and can be implemented with reference to the known technologies.

[0033] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A pouring argon protection structure for producing ultra-pure steel, comprising: The nozzle body has a molten steel channel in it, and the molten steel channel is arranged along the length direction of the nozzle body and observes the two ends of the nozzle body; it is characterized in that: A sealing unit, wherein the sealing unit is arranged on one end of the nozzle body and is used to seal the end of the nozzle body; A gas injection unit, wherein the gas injection unit is arranged on the nozzle body, and gas can be introduced into the nozzle body through the gas injection unit; the gas injection unit comprises a gas channel, an air inlet and an air outlet, wherein the gas channel is arranged in the nozzle body and extends along the direction of the nozzle body, the first end of the air inlet is arranged on the outer wall of the nozzle body, the second end of the air inlet is connected to the gas channel, the first end of the air outlet is connected to the gas channel, and the second end of the air outlet is connected to the molten steel channel, and argon can enter the molten steel channel through the air inlet, the gas channel and the air outlet.

2. A pouring argon protection structure for producing ultra-clean steel according to claim 1, characterized in that: The sealing unit comprises: A sealing end cover, which is sleeved on the end of the nozzle body, and is provided with an injection port, which runs through both ends of the sealing end cover; A sealing ring is arranged on the contact surface between the sealing end cover and the nozzle body, and is used to improve the sealing performance between the nozzle body and the sealing end cover.

3. A pouring argon protection structure for producing ultra-clean steel according to claim 2, characterized in that: The sealing end cover is provided with a through hole, a first end of the through hole is communicated with the outside, and a second end of the through hole is communicated with the air inlet.

4. The pouring argon protection structure for producing ultra-clean steel according to claim 2, characterized in that: The sealing ring is a component made of high temperature resistant material.

5. The pouring argon protection structure for producing ultra-clean steel according to claim 1, characterized in that: A first sealing groove for accommodating a sealing ring is provided on the top surface of the nozzle body.

6. The pouring argon protection structure for producing ultra-clean steel according to claim 2, characterized in that: A second sealing groove for accommodating a sealing ring is provided on the bottom surface of the sealing end cover.

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