Cooling device for steelmaking

Abstract

The utility model provides a cooling device for steelmaking, which comprises a plurality of shells, heat exchange tubes are clamped among the shells, a liquid outlet is arranged at the upper end of each heat exchange tube, a liquid inlet is arranged at the lower end of each heat exchange tube, the lower surface of each heat exchange tube is communicated with a nozzle, heat exchange plates are fixedly connected with the inner walls of the shells, and the heat exchange plates are fixedly connected with the outer walls of the shells. During cooling, the heat exchange pipe is filled with the water pumping device, after the heat exchange pipe is filled with the water, the cooling medium conducts heat exchange on the heat exchange plate and the molten steel along the heat exchange pipe, meanwhile, a spray head arranged at the lower end of the heat exchange pipe sprays the molten steel to conduct cooling, and after cooling, the molten steel is sprayed into the heat exchange pipe through the spray head. And then the one-way valve is communicated with a sucking pump, gas is injected into the one-way valve for impurity removal, and the one-way valve blows inert gas into the molten steel to stir the molten steel, so that impurities on the surface are separated from the molten steel.

Description

Technical Field

[0001] This utility model relates to the field of steelmaking cooling, and more specifically, to a cooling device for steelmaking. Background Technology

[0002] Converter steelmaking uses molten iron as the main raw material. First, molten iron is poured into the converter, and then high-pressure oxygen is blown into the converter through an oxygen lance at the top. During oxygen blowing, impurities in the molten iron are oxidized, and slag is formed by adding solvents such as lime. The converter rotates continuously during the blowing process, ensuring thorough mixing of the molten iron and flux, resulting in a more uniform reaction. Once the chemical composition and temperature of the molten steel meet the requirements, it is poured into a ladle for further processing, such as refining and continuous casting. After refining, the quality of the steel is significantly improved, with noticeable enhancements in purity, uniformity, and mechanical properties. For the production of high-quality steel (such as automotive steel and aerospace steel), the refining process is essential to meet the stringent performance requirements of these high-end fields.

[0003] When molten steel is cooled, impurities are generated during the cooling process. Therefore, it is necessary to remove these impurities. However, the temperature of molten steel is relatively high, and existing impurity removal devices are prone to melting when they come into contact with molten steel, which in turn generates more impurities and makes it impossible to filter them effectively.

[0004] Therefore, we have made improvements to this and proposed a cooling device for steelmaking. Utility Model Content

[0005] The purpose of this invention is to address the problem that existing impurity removal devices tend to melt when they encounter molten steel, resulting in more impurities and thus failing to adequately filter them.

[0006] In order to achieve the above-mentioned objectives, this utility model provides a cooling device for steelmaking to solve the above problems.

[0007] The present invention is as follows:

[0008] The device includes an outer shell, which consists of multiple outer shells. Heat exchange tubes are snapped between the multiple outer shells. Each heat exchange tube has a drain port at its upper end and a liquid inlet at its lower end. A nozzle is connected to the lower surface of the heat exchange tube. A heat exchange plate is fixedly connected to the inner wall of the outer shell, and a one-way valve is connected through the inner wall of the heat exchange plate.

[0009] As a preferred technical solution of this utility model, a support frame is fixedly connected to the lower end of the outer shell, and a feed pipe is fixedly connected to the upper end of the support frame, and the feed pipe is connected to the outer shell.

[0010] As a preferred technical solution of this utility model, the end of the feed pipe away from the outer shell is connected to a sealing plate, and the sealing plate is provided with a feed inlet away from the surface of the feed pipe.

[0011] As a preferred technical solution of this utility model, the outer shell is hinged to a cover plate away from the feed pipe surface, and the cover plate is provided with a discharge port away from the feed pipe surface.

[0012] As a preferred technical solution of this utility model, the one-way valve includes an outer cylinder, a partition is fixedly connected to the inner wall of the outer cylinder, a guide pipe is fixedly connected between the partitions, the guide pipe narrows from the lower end to the upper end to form a variable diameter shape, and a sealing ring is fixedly connected to the upper surface of the outer cylinder.

[0013] As a preferred technical solution of this utility model, the heat exchange tube is bent into a U shape from one end to the other, and the opening is fixedly connected to the heat exchange plate. There are multiple heat exchange tubes, which are arranged in an alternating manner on the outer surface of the heat exchange plate.

[0014] As a preferred technical solution of this utility model, the upper end of the heat exchange plate is provided with an opening, and the opening and the nozzle are located on the same axis.

[0015] As a preferred technical solution of this utility model, there are multiple one-way valves, all of which are inclined from the lower end to the upper end.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. When cooling down, first fill the heat exchange tube with a water pump. After filling, the cooling medium will exchange heat with the heat exchange plate and the molten steel along the heat exchange tube. At the same time, the nozzle at the lower end of the heat exchange tube will spray the molten steel to cool it down. After cooling down, connect the one-way valve to the air pump and inject gas into the one-way valve to remove impurities. The one-way valve will stir the molten steel by blowing inert gas into it, so that the impurities on the surface will be separated from the molten steel.

[0018] 2. The one-way valve agitates the molten steel by blowing inert gas, such as argon, into it, causing surface impurities to separate from the molten steel. The gas enters the molten steel through the permeable brick at the bottom or the spray gun, generating a large number of bubbles. As these bubbles rise, they adsorb impurities on the surface of the molten steel and carry them to the slag layer above the surface. The outer cylinder connects the gas storage device to the outer shell. The baffles fixedly connected to the inner wall of the outer cylinder, and the guide pipes fixedly connected between the baffles, prevent molten steel from flowing back into the gas storage device. Attached Figure Description

[0019] Figure 1 A schematic diagram of the overall structure of a cooling device for steelmaking provided by this utility model;

[0020] Figure 2A schematic diagram of a cooling device for steelmaking provided by this utility model;

[0021] Figure 3 A schematic diagram of a cooling device for steelmaking provided by this utility model;

[0022] Figure 4 A schematic diagram of a purification device for a cooling device used in steelmaking, provided by this utility model.

[0023] The image shows:

[0024] 1. Outer shell; 101. Heat exchange tube; 102. Drain port; 103. Inlet port; 104. Nozzle; 105. Heat exchange plate; 106. Check valve;

[0025] 2. Support frame; 201. Feed pipe;

[0026] 3. Sealing plate; 301. Feed inlet;

[0027] 4. Cover plate; 401. Discharge port;

[0028] 5. Outer cylinder; 501. Partition plate; 502. Guide pipe; 503. Sealing ring. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0030] As in the background art, existing impurity removal devices are prone to melting when they come into contact with molten steel, which in turn generates more impurities, thus failing to adequately filter the impurities.

[0031] To solve this technical problem, this utility model provides a cooling device for steelmaking, which is used to remove impurities by blowing air and stirring during the impurity removal process.

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0033] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] A cooling device for steelmaking includes an outer shell 1, which consists of multiple outer shells. Heat exchange tubes 101 are connected between the multiple outer shells 1. A drain port 102 is provided at the upper end of the heat exchange tube 101, and a liquid inlet 103 is provided at the lower end of the heat exchange tube 101. A nozzle 104 is connected to the lower surface of the heat exchange tube 101. A heat exchange plate 105 is fixedly connected to the inner wall of the outer shell 1, and a one-way valve 106 is connected through the inner wall of the heat exchange plate 105.

[0036] During cooling, the heat exchange tube 101 is first filled with water using a pumping device. After filling, the cooling medium flows along the heat exchange tube 101 to exchange heat with the heat exchange plate 105 and the molten steel. At the same time, the nozzle 104 at the lower end of the heat exchange tube 101 sprays the molten steel to cool it down. After cooling, the one-way valve 106 is connected to the air pump, and gas is injected into the one-way valve 106 to remove impurities. The one-way valve 106 agitates the molten steel by blowing inert gas, such as argon, into it, so that impurities on the surface are separated from the molten steel.

[0037] A support frame 2 is fixedly connected to the lower end of the outer shell 1, and a feed pipe 201 is fixedly connected to the upper end of the support frame 2. The feed pipe 201 is connected to the outer shell 1.

[0038] The support frame 2, which is fixedly connected to the lower end of the outer shell 1, is used to support the outer shell 1, and the feed pipe 201, which is fixedly connected to the upper end of the support frame 2, is used to transport molten steel.

[0039] The end of the feed pipe 201 away from the outer casing 1 is connected to a sealing plate 3, and the side of the sealing plate 3 away from the feed pipe 201 is provided with a feed inlet 301.

[0040] The sealing plate 3 connected to the end of the feed pipe 201 away from the outer casing 1 is used to seal the outer casing 1 in order to cool the molten steel. The feed port 301 set on the side of the sealing plate 3 away from the feed pipe 201 is used for conveying the molten steel.

[0041] A cover plate 4 is hinged to the side of the outer shell 1 away from the feed pipe 201, and a discharge port 401 is provided on the side of the cover plate 4 away from the feed pipe 201.

[0042] The cover plate 4, which is hinged to the side of the outer shell 1 away from the feed pipe 201, is used to seal the outer shell 1. The discharge port 401 on the side of the cover plate 4 away from the feed pipe 201 is used to discharge the cooled molten steel.

[0043] The one-way valve 106 includes an outer cylinder 5, with a partition 501 fixedly connected to the inner wall of the outer cylinder 5. A guide pipe 502 is fixedly connected between the partitions 501. The guide pipe 502 narrows from the lower end to the upper end, forming a variable diameter shape. A sealing ring 503 is fixedly connected to the upper surface of the outer cylinder 5. There are multiple one-way valves 106, all of which are inclined from the lower end to the upper end.

[0044] One-way valve 106 agitates the molten steel by blowing inert gas, such as argon, into it, causing surface impurities to separate from the molten steel. The gas enters the molten steel through the bottom permeable brick or spray gun, generating a large number of bubbles. As these bubbles rise, they adsorb impurities on the surface of the molten steel and carry them to the slag layer above the surface. The outer cylinder 5 connects the gas storage device to the outer shell 1. The baffle 501 fixedly connected to the inner wall of the outer cylinder 5, and the guide pipe 502 fixedly connected between the baffles 501, prevent the molten steel from flowing back into the gas storage device.

[0045] The heat exchange tube 101 is bent into a U-shape from one end to the other, and its opening is fixedly connected to the heat exchange plate 105. There are multiple heat exchange tubes 101, which are arranged in an alternating manner on the outer surface of the heat exchange plate 105. An opening is provided at the upper end of the heat exchange plate 105, and the opening is located on the same axis as the nozzle 104.

[0046] The heat exchange tube 101 is configured to be bent into a U shape from one end to the other, and the opening is fixedly connected to the heat exchange plate 105 so that the nozzle 104 at the lower end of the heat exchange tube 101 can spray cooling medium to cool it down, while also preventing the cooling medium from being discharged along the outer wall of the heat exchange plate 105.

[0047] The usage process of the cooling device for steelmaking provided by this utility model is as follows:

[0048] During cooling, the heat exchange tube 101 is first filled with water using a pumping device. After filling, the cooling medium flows along the heat exchange tube 101 to exchange heat with the heat exchange plate 105 and the molten steel. Simultaneously, the nozzle 104 at the lower end of the heat exchange tube 101 sprays the molten steel to cool it down. After cooling, the one-way valve 106 is connected to the air pump, and gas is injected into the one-way valve 106 to remove impurities. The one-way valve 106 agitates the molten steel by blowing inert gas, such as argon, into it, causing surface impurities to separate from the molten steel. The support frame 2, fixedly connected to the lower end of the outer shell 1, supports the outer shell 1. The feed pipe 201, fixedly connected to the upper end of the support frame 2, is used to transport the molten steel.

[0049] The sealing plate 3 connected to the end of the feed pipe 201 away from the outer casing 1 is used to seal the outer casing 1 in order to cool the molten steel. The feed inlet 301 set on the side of the sealing plate 3 away from the feed pipe 201 is used for conveying the molten steel.

[0050] The cover plate 4 hinged to the side of the outer shell 1 away from the feed pipe 201 is used to seal the outer shell 1, and the discharge port 401 set on the side of the cover plate 4 away from the feed pipe 201 is used to discharge the cooled molten steel.

[0051] One-way valve 106 agitates the molten steel by blowing inert gas, such as argon, into it, causing surface impurities to separate from the molten steel. The gas enters the molten steel through the bottom permeable brick or spray gun, generating a large number of bubbles. As these bubbles rise, they adsorb impurities on the surface of the molten steel and carry them to the slag layer above the surface. The outer cylinder 5 connects the gas storage device to the outer shell 1. The baffle 501 fixedly connected to the inner wall of the outer cylinder 5 and the guide pipe 502 fixedly connected between the baffles 501 prevent the molten steel from flowing back into the gas storage device.

[0052] The heat exchange tube 101 is configured to be bent into a U shape from one end to the other, and the opening is fixedly connected to the heat exchange plate 105 so that the nozzle 104 at the lower end of the heat exchange tube 101 can spray cooling medium to cool it down, while also preventing the cooling medium from being discharged along the outer wall of the heat exchange plate 105.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; on the contrary, the purpose of providing these embodiments is to make a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the scope of protection of this utility model patent.

Claims

1. A cooling device for steelmaking, characterized in that, The utility model provides a heat exchange device, including shell (1), the shell (1) has a plurality of, and the heat exchange pipe (101) is clamped between a plurality of shell (1), the heat exchange pipe (101) upper end is provided with drain (102), the heat exchange pipe (101) lower end is provided with liquid inlet (103), the heat exchange pipe (101) lower surface is connected with shower head (104), the shell (1) inner wall is fixedly connected with heat exchange plate (105), the heat exchange plate (105) inner wall is connected with one-way valve (106) through.

2. The cooling device for steelmaking according to claim 1, characterized by The shell (1) lower end is fixedly connected with support frame (2), the support frame (2) upper end is fixedly connected with feed pipe (201), the feed pipe (201) is communicated with shell (1).

3. The cooling device for steelmaking according to claim 2, characterized by The feed pipe (201) is communicated with sealing plate (3) away from shell (1) end, the sealing plate (3) is provided with feed inlet (301) away from feed pipe (201) side.

4. The cooling device for steelmaking according to claim 2, characterized by The shell (1) is hinged with cover plate (4) away from feed pipe (201) side, the cover plate (4) is provided with discharge port (401) away from feed pipe (201) side.

5. The cooling device for steelmaking according to claim 1, characterized by The one-way valve (106) includes outer cylinder (5), the outer cylinder (5) inner wall is fixedly connected with partition (501), the partition (501) is fixedly connected with flow guide pipe (502) between, the flow guide pipe (502) is shrunk from lower end to upper end and presents the variable diameter shape, the outer cylinder (5) upper surface is fixedly connected with sealing ring (503).

6. The cooling device for steelmaking according to claim 1, characterized by The heat exchange pipe (101) is bent to U shape from one end to the other end, and the opening is fixedly connected with heat exchange plate (105), the heat exchange pipe (101) has a plurality of, and presents staggered type arrangement on the outer surface of heat exchange plate (105).

7. The cooling device for steelmaking according to claim 1, characterized by The heat exchange plate (105) upper end is provided with opening, and the opening is located at the same axis with shower head (104).

8. The cooling device for steelmaking according to claim 1, characterized by The one-way valve (106) has a plurality of, and all are inclined from lower end to upper end.

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