A device for feeding cold steel mesh and an operation method

Abstract

The present invention relates to a device for feeding a cold steel mesh, which is used in a mold. The mold is used to hold molten steel, and a protective slag is formed on the surface of the molten steel in the mold. The device includes: a slag-avoiding feeding assembly disposed in the mold; and a steel mesh. The slag-avoiding feeding assembly immerses the steel mesh into the molten steel without contacting the protective slag. Among them, the steel mesh immersed in the molten steel is an arc-shaped steel mesh, and the concave surface formed by the arc-shaped steel mesh is opposite to the direction of molten steel flow. By using the steel mesh immersed in the molten steel in this technical solution, when the steel mesh immersed in the molten steel contacts the flowing molten steel, the molten steel can freely flow through the holes of the steel mesh, and during the passing process, it cools and nucleates, achieving little influence on the flow field, a large contact area between the steel mesh and the molten steel, and promoting dispersed nucleation. Therefore, the quality of the continuous casting billet can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of continuous casting, and in particular to a cold steel mesh feeding device and an operating method. Background Art

[0002] The introduction of the steel strip feeding process provides a new idea for improving the internal quality of large-section continuous casting billets. The continuous casting mold steel strip feeding method refers to continuously feeding the supercooled steel strip into the continuous casting crystallizer, absorbing a large amount of heat through the temperature rise and phase change of the vibrating steel strip, reducing the superheat of the molten steel at the center of the billet, and providing a large number of equiaxed crystal nuclei, which can promote the transformation of columnar crystals to equiaxed crystals, increase the equiaxed crystal rate at the end of solidification, and significantly improve the quality defects such as segregation, looseness and cracks in the center of the billet. From the perspective of process feasibility, improvement effect and economic benefits, this method is an effective means to solve the internal quality problems of large-size continuous casting billets;

[0003] When using the continuous casting mold feeding steel strip technology, the feed material is usually cold steel strip. If the steel strip size is small, the dispersion nucleation effect is poor and the improvement effect is not obvious; if the steel strip size is too large, it will affect the flow state in the liquid core and the steel strip is prone to incomplete melting. Secondly, due to the presence of nozzle jets and complex vortices in the liquid core, the steel strip is easy to break into segments and eventually be captured by the billet shell to cause "steel strip clamping", which deteriorates the quality of the billet. Summary of the invention

[0004] (I) Technical solution

[0005] In order to achieve the above-mentioned object, a first aspect of the present invention provides a cold steel mesh feeding device.

[0006] A second aspect of the present invention provides an operating method for a cold steel mesh feeding device.

[0007] In view of this, according to a first aspect of an embodiment of the present application, a cooling steel mesh device is provided, which is used in a crystallizer, wherein the crystallizer is used to carry molten steel, and protective slag is formed on the surface of the molten steel in the crystallizer, comprising:

[0008] A slag-avoiding feeding component is arranged in the crystallizer;

[0009] The steel mesh, the slag-avoiding feeding assembly enables the steel mesh to be immersed in the molten steel without contacting the protective slag; wherein the steel mesh immersed in the molten steel is an arc-shaped steel mesh, and the concave surface formed by the arc-shaped steel mesh is offset from the direction of flow of the molten steel.

[0010] Optionally, the cold steel mesh feeding device further comprises:

[0011] A vibration device is in contact with the steel mesh and is used to vibrate the steel mesh so as to immerse it in the molten steel.

[0012] Optionally, the cold steel feeding device further includes:

[0013] A position adjustment component, connected to the slag avoiding feeding component, for adjusting the position of the slag avoiding feeding component along the surface of the protective slag.

[0014] Optionally, the position adjustment component includes:

[0015] A driving telescopic member, arranged between the slag avoiding feeding component and the crystallizer wall, for adjusting the horizontal position of the slag avoiding feeding component inside the crystallizer.

[0016] Optionally, the position adjustment component includes:

[0017] A limiting member, slidably mounted along the edge of the molten steel on the crystallizer, and the limiting member is connected to the slag avoiding feeding component for moving the limiting member and the slag avoiding feeding component together.

[0018] Optionally, the slag avoiding feeding component includes:

[0019] A slag avoiding main body, arranged in the crystallizer, and at least part of the slag avoiding main body is immersed in the molten steel;

[0020] An arc-shaped immersion inlet, arranged at one end of the slag avoiding main body immersed in the molten steel;

[0021] An arc-shaped immersion outlet, arranged at one end of the slag avoiding main body not in contact with the protective slag and the molten steel, and the arc-shaped immersion inlet is communicated with the arc-shaped immersion outlet for the steel material to sequentially pass through the arc-shaped immersion inlet and the arc-shaped immersion outlet and immerse in the molten steel.

[0022] Optionally, the slag avoiding feeding component includes:

[0023] A shaper, formed with an arc-shaped shaping hole therethrough, for the steel material to enter the arc-shaped immersion inlet after passing through the arc-shaped shaping hole.

[0024] Optionally, there are at least two slag avoiding feeding components, and the slag avoiding feeding components are evenly distributed in the crystallizer.

[0025] According to the second aspect of the embodiments of the present application, an operation method of the cold steel feeding device is proposed, for operating the steel feeding device as proposed in any one of the first aspects above, and the operation method includes:.

[0026] One end of the slag avoiding feeding component passes through the protective slag and is immersed in the molten steel, and the other end of the slag avoiding feeding component is located on the side of the protective slag away from the molten steel;

[0027] Continuously blow argon gas into the slag-avoiding body to form a positive-pressure argon gas environment higher than the standard atmospheric pressure inside the slag-avoiding body;

[0028] Pass the steel mesh through the slag-avoiding feeding assembly and immerse it in the molten steel in an arc state;

[0029] The vibration device contacts the steel mesh to vibrate the steel mesh and immerse it in the molten steel.

[0030] (II) Beneficial effects

[0031] The beneficial effects of the present invention are as follows: The cold steel mesh feeding device provided by the embodiments of the present application includes a slag-avoiding feeding assembly. Among them, the slag-avoiding feeding assembly is arranged in the mold, and the steel mesh is immersed in the molten steel through the slag-avoiding feeding assembly without contacting the protective slag, avoiding the steel mesh from carrying the protective slag into the molten steel; in this technical solution, by selecting the steel mesh to be immersed in the molten steel, when the steel mesh immersed in the molten steel contacts the flowing molten steel, the molten steel can flow freely through the holes of the steel mesh, and during the passing process, it cools and nucleates, realizing a small influence on the flow field and promoting nucleation; the contact area between the steel mesh and the molten steel is large, realizing dispersed nucleation. Therefore, the quality of the continuous casting billet can be greatly improved; moreover, the steel mesh immersed in the molten steel is an arc-shaped steel mesh, and the concave surface of the arc-shaped steel mesh is opposite to the direction of the molten steel flow. Compared with a flat steel mesh, the arc-shaped steel mesh has different effects when contacting the flowing molten steel. The arc-shaped steel mesh has increased strength compared with the flat steel mesh. When contacting the nozzle jet and complex eddies, the risk of steel mesh fracture will be greatly reduced, thereby avoiding the phenomenon of being finally captured by the billet shell and causing inclusion bands, avoiding deteriorating the quality of the cast billet, and thus improving the quality of the cast billet.

[0032] At the same time, by arranging the vibration device to contact the steel mesh to be immersed in the molten steel, when the vibration device works, the vibrating steel mesh can be vibrated. The steel mesh vibrates while being immersed in the molten steel. The vibrating steel mesh plays a stirring role in the molten steel, making the temperature in the molten steel uniform and promoting the peeling of grains from the steel mesh, further improving the effect of dispersed nucleation, and thus achieving the effect of improving the quality of the molten steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a working principle diagram of an embodiment of the steel feeding device of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the slag-avoiding body of an embodiment of the steel feeding device of the present invention;

[0035] Figure 3 It is a schematic flow chart of the operation method of the cold steel mesh feeding device of the present invention

[0036]

Description of the reference numerals

[0037] 100 - Mold, 200 - Molten steel, 300 - Flux, 400 - Slag - avoiding feeding assembly, 500 - Steel mesh, 600 - Vibration device, 700 - Position - adjusting assembly;

[0038] 410 - Slag - avoiding main body, 420 - Shaper;

[0039] 710 - Driving telescopic part, 720 - Limiting part;

[0040] 401 - Arc - shaped immersion inlet, 402 - Arc - shaped immersion outlet, 403 - Arc - shaped shaping hole. Detailed implementation mode

[0041] To better understand the above - mentioned technical solution, the exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and the scope of the present invention can be fully conveyed to those skilled in the art.

[0042] As Figure 1 and Figure 2 shown, according to the first aspect of the embodiments of the present application, a cold - feeding steel - mesh device is proposed for use in a mold 100. The mold 100 is used to hold molten steel 200, and a flux 300 is formed on the surface of the molten steel 200 in the mold 100. The cold - feeding steel - mesh device includes: a slag - avoiding feeding assembly 400 disposed in the mold 100; a steel mesh 500. The slag - avoiding feeding assembly enables the steel mesh 500 to be immersed in the molten steel 200 without contacting the flux 300. Among them, the steel mesh 500 immersed in the molten steel 200 is an arc - shaped steel mesh, and the concave surface formed by the arc - shaped steel mesh abuts against the flowing direction of the molten steel 200.

[0043] The cold - feeding steel - mesh device provided by the embodiments of the present application is used in a mold 100. The mold 100 is used to hold molten steel 200, and the surface of the molten steel 200 in the mold 100 contacts the air and a flux 300 is formed.

[0044] Exemplarily, when replenishing and conveying molten steel 200 into the mold 100, an immersion nozzle can be inserted into the molten steel 200, and the molten steel 200 is replenished and conveyed into the mold 100 through the immersion nozzle. The capacity of the molten steel 200 in the mold 100 can be replenished and adjusted through the immersion nozzle to meet the requirements. When replenishing and conveying molten steel 200 into the mold 100, the molten steel 200 conveyed through the immersion nozzle will form a nozzle jet and complex eddies in the mold 100.

[0045] Exemplarily, in the prior art, a flat steel strip is usually fed into the molten steel 200. When the steel strip is immersed in the molten steel 200, it will first contact the protective slag 300 on the surface of the molten steel 200 before it can be immersed in the molten steel 200. This operation method is likely to cause the exposure and slag entrainment of the molten steel 200, resulting in a large increase in the inclusion content, affecting the purity of the molten steel 200 and the quality of the subsequent continuous casting billet.

[0046] The cold steel mesh feeding device provided by the embodiment of the present application includes a slag-avoiding feeding component 400. Among them, the slag-avoiding feeding component 400 is arranged in the mold. The steel mesh 500 is immersed in the molten steel 200 through the slag-avoiding feeding component 400 without contacting the protective slag 300, avoiding the steel mesh 500 carrying the protective slag 300 into the molten steel 200. In this technical solution, by selecting the steel mesh 500 to be immersed in the molten steel 200, when the steel mesh 500 immersed in the molten steel 200 contacts the flowing molten steel 200, the molten steel 200 can freely flow through the holes of the steel mesh 500. Therefore, the influence on the flow field is small, the steel mesh is not easily deformed when melting in the liquid core of the molten steel 200, and the effect of multi-point dispersed nucleation can be achieved, which can greatly improve the quality of the continuous casting billet. And, the steel mesh 500 immersed in the molten steel 200 is an arc-shaped steel mesh, and the concave surface of the arc-shaped steel mesh is against the flowing direction of the molten steel 200. Compared with the flat steel mesh, the arc-shaped steel mesh has different effects when contacting the flowing molten steel 200. Compared with the flat steel mesh, the arc-shaped steel mesh has increased strength. When contacting the nozzle jet and complex eddy currents, the risk of the steel mesh 500 breaking will be greatly reduced, thereby avoiding the occurrence of the phenomenon of being finally captured by the billet shell and causing inclusion-carrying steel strips, avoiding deteriorating the quality of the casting billet, and thus improving the quality of the casting billet.

[0047] In the prior art, when using the continuous casting mold steel strip feeding technology, the feeding material is usually a steel strip. The size of the steel strip is small and the dispersed nucleation effect is poor, and the improvement effect is not obvious.

[0048] As Figure 1 shown, in some examples, the steel feeding device further includes: a vibration device 600, the vibration device 600 is in contact with the steel mesh 500 and is used to vibrate the steel mesh 500 into the molten steel 200.

[0049] In this technical solution, the steel feeding device further includes a vibration device 600. Exemplarily, the steel mesh 500 is immersed into the molten steel 200 based on the rotating roller and gravity. The vibration device 600 contacts the steel mesh 500 to be immersed into the molten steel 200. When the vibration device 600 works, the vibrating steel mesh 500 can be vibrated. While the steel mesh 500 is immersed into the molten steel 200 under the action of the rotating roller and gravity, it vibrates at the same time. The vibrating steel mesh 500 plays a role in stirring in the molten steel 200, promotes the peeling of grains from the steel mesh 500, further improves the effect of dispersed nucleation, and thus achieves the effect of improving the quality of the molten steel 200. At the same time, for the steel mesh 500 immersed into the molten steel 200 based on the action of the rotating roller and gravity, when passing through the slag avoiding feeding assembly 400, there is a situation where the steel mesh 500 contacts the slag avoiding feeding assembly 400. At this time, there is a certain resistance between the steel mesh 500 and the slag avoiding feeding assembly 400, which affects the feeding speed. When the steel mesh 500 vibrates, the steel mesh 500 is in a situation of not contacting the slag avoiding feeding assembly 400. At this time, the resistance decreases and the feeding speed increases, thereby increasing the feeding speed.

[0050] Exemplarily, the vibration device 600 vibrates the steel mesh 500 in a low amplitude and high frequency vibration mode (0.01 - 10 mm, 10 - 10000 Hz) and feeds it into the slag avoiding feeding assembly 400. The feeding amount is about 0.5 - 2.0% of the mass of the molten steel 200 injected into the mold 100.

[0051] Exemplarily, during operation, argon gas needs to be continuously blown into the slag avoiding feeding assembly 400 to form a positive pressure argon gas environment higher than the standard atmospheric pressure inside the slag avoiding feeding assembly 400. The steel mesh 500 can perform vibration feeding through the vibration device 600, which can stimulate the formation of equiaxed crystal nuclei and effectively improve the equiaxed crystal ratio of the continuous casting billet. In addition, due to the vibration of the steel mesh 500, the stirring effect of the molten steel 200 near the steel mesh 500 will be strengthened, further promoting the uniformity of temperature and composition. The vibration of the steel mesh 500 will also entrain a small amount of argon gas in the slag avoiding feeding assembly 400 into the inside of the mold 100. The floating argon bubbles can capture inclusion particles and carry them to float upward, removing the inclusions in the molten steel 200, improving the purity of the molten steel 200, and improving the quality of the casting billet.

[0052] As Figure 1 shown, in some examples, the cold steel mesh feeding device further includes: a position adjusting assembly 700, connected to the above-mentioned slag avoiding feeding assembly 400, and used to adjust the position of the above-mentioned slag avoiding feeding assembly 400 along the surface of the above-mentioned protective slag 300.

[0053] In this technical solution, the feeding cooler mesh device further includes a position adjustment component 700 connected to the slag avoiding feeding component 400. Through the position adjustment component 700, the feeding slag avoiding component 400 can be adjusted along the horizontal plane of the above-mentioned protective slag 300. The steel mesh 500 is fed through the feeding slag avoiding component 400. When the position of the feeding slag avoiding component 400 is adjusted, the feeding position of the steel mesh 500 to the molten steel 200 can be adjusted simultaneously, and then real-time adjustment can be made according to the actual situation, thus ensuring the quality of the continuous casting billet to the greatest extent.

[0054] As Figure 1 shown, in some examples, the above-mentioned position adjustment component 700 includes: a driving telescopic member 710, which is arranged between the above-mentioned slag avoiding feeding component 400 and the crystal wall of the above-mentioned mold 100, and is used to adjust the horizontal position of the above-mentioned slag avoiding feeding component 400 inside the above-mentioned mold 100.

[0055] In this technical solution, the position adjustment component 700 includes a driving telescopic member 710 arranged between the above-mentioned slag avoiding feeding component 400 and the crystal wall of the above-mentioned mold 100. When the driving telescopic member 710 works, the slag avoiding feeding component 400 can be adjusted to be in the horizontal position inside the mold 100, and then the horizontal position of the steel mesh 500 immersed in the molten steel 200 through the slag avoiding feeding component 400 inside the mold 100 can be changed.

[0056] As Figure 1 shown, in some examples, the above-mentioned position adjustment component 700 includes: a limiting member 720, which is slidably installed along the edge of the above-mentioned molten steel 500 on the above-mentioned mold 100, and the above-mentioned limiting member 720 is connected to the above-mentioned slag avoiding feeding component 400, and is used to move the above-mentioned limiting member 720 and the above-mentioned slag avoiding feeding component 400 together.

[0057] In this technical solution, the position adjustment component 700 includes a limiting member 720 slidably installed on the above-mentioned mold 100. Among them, the limiting member 720 is connected to the slag avoiding feeding component 400, and at the same time, the limiting member 720 slides along the edge of the molten steel 500. When the limiting member 720 moves, the slag avoiding feeding component 400 moves together with the limiting member 720. When the slag avoiding feeding component 400 is changed to be in the horizontal position of the molten steel 500 through the driving telescopic member 710, the limiting member 720 can limit the moving direction of the slag avoiding feeding component 400, ensuring the stability of the position adjustment component 700 during operation, and at the same time ensuring the feeding position of the steel mesh 500.

[0058] As Figure 1 and Figure 2As shown, in some examples, the slag avoidance feeding assembly 400 includes: a slag avoidance main body 410 disposed in the mold 100, and at least a part of the slag avoidance main body 410 is immersed in the molten steel 200; an arc-shaped immersion inlet 401 disposed at one end of the slag avoidance main body 410 immersed in the molten steel 200; an arc-shaped immersion outlet 402 disposed at one end of the slag avoidance main body 410 not in contact with the mold powder 300 and the molten steel 200. The arc-shaped immersion inlet 401 is communicated with the arc-shaped immersion outlet 402 for the steel material 500 to sequentially pass through the arc-shaped immersion inlet 401 and the arc-shaped immersion outlet 402 and then immerse into the molten steel 200.

[0059] In this technical solution, the slag avoidance feeding assembly 400 includes a slag avoidance main body 410 disposed in the mold 100. At least a part of the slag avoidance main body 410 is immersed in the molten steel 200, so that a part of the slag avoidance main body 410 is inside the molten steel 200 and a part is outside the molten steel 200 and the mold powder 300, without contacting the molten steel 200 and the mold powder 300. An arc-shaped immersion inlet 401 is formed on the slag avoidance main body 410 outside the molten steel 200 and the mold powder 300, and an arc-shaped immersion outlet 402 is formed on the slag avoidance main body 410 inside the molten steel 200. The arc-shaped immersion inlet 401 is communicated with the arc-shaped immersion outlet 402. After the steel mesh 500 sequentially passes through the arc-shaped immersion inlet 401 and the arc-shaped immersion outlet 402, it then immerses into the molten steel 200. The steel mesh 500 passing through the arc-shaped immersion inlet 401 and the arc-shaped immersion outlet 402 can be plastically deformed through the arc-shaped immersion inlet 401 and the arc-shaped immersion outlet 402, so as to form an arc-shaped steel mesh and immerse into the molten steel 200, and can also maintain the arc shape of the steel mesh 500 to prevent the arc-shaped steel mesh from restoring to a rectangular shape after entering the molten steel 200.

[0060] Exemplarily, a plastic shaping through hole is formed between the arc-shaped immersion inlet 401 and the arc-shaped immersion outlet 402. An argon blowing hole is provided on the slag avoidance main body 410, and the argon blowing hole is communicated with the plastic shaping through hole. Argon gas is continuously blown into the plastic shaping through hole through the argon blowing hole to exhaust the air in the plastic shaping through hole and form a slightly positive pressure argon gas environment with the air pressure in the plastic shaping through hole slightly higher than the standard atmospheric pressure.

[0061] As Figure 1 and Figure 2 As shown, in some examples, the slag avoidance feeding assembly 400 includes: a shaper 420 having an arc-shaped shaping hole 403 formed therethrough for the steel material 500 to pass through the arc-shaped shaping hole 403 and then enter the arc-shaped immersion inlet 401.

[0062] In this technical solution, the slag-avoiding feeding component 400 includes a shaper 420. The preform 420 is formed with an arc-shaped shaping hole 403. Before the steel mesh 500 enters the arc-shaped immersion inlet 401, it first passes through the arc-shaped shaping hole 403 to be preformed into an arc, so as to ensure that a certain arc is generated before the steel mesh 500 enters the arc-shaped immersion inlet 401, thereby ensuring the plastic effect on the steel mesh 500, avoiding jamming when the steel mesh 500 enters the arc-shaped immersion inlet 401, and ensuring the stability of the steel mesh 500 to immerse into the molten steel 200 through the slag-avoiding feeding component 400.

[0063] As Figure 1 shown, in some examples, at least two of the above-mentioned slag-avoiding feeding components 400 are provided, and the above-mentioned slag-avoiding feeding components 400 are evenly distributed on the above-mentioned mold 100.

[0064] In this technical solution, as can be seen from the foregoing, the slag-avoiding feeding component 400 is used to enable the steel mesh 500 to immerse into the molten steel 200 without contacting the above-mentioned protective slag 300. The above-mentioned slag-avoiding feeding components 400 are evenly distributed on the above-mentioned mold 100, and the above-mentioned steel mesh 500 immerses into the above-mentioned molten steel 200; thereby, the steel mesh 500 can be evenly distributed in the mold 100 to improve the uniformity of the solidification structure distribution.

[0065] According to the second aspect of the embodiments of the present application, an operation method of a cold steel mesh feeding device is proposed, which is used to operate the cold steel mesh feeding device as described in any of the above technical solutions. The operation method includes:

[0066] S1: One end of the slag-avoiding feeding component 400 passes through the protective slag 300 and immerses into the molten steel 200, and the other end of the slag-avoiding feeding component 400 is located on the side of the protective slag 300 away from the molten steel 200;

[0067] S2: Continuously blow argon into the slag-avoiding main body 410 to form a positive-pressure argon environment higher than the standard atmospheric pressure in the slag-avoiding main body 410;

[0068] S3: Pass the steel mesh 500 through the slag-avoiding feeding component 400 and immerse it into the molten steel 200 in an arc state;

[0069] S4: The vibration device 600 contacts the steel mesh 500 to make the steel mesh 500 vibrate and immerse into the molten steel 200.

[0070] Since the operation method of a cold steel mesh feeding device provided by the embodiments of the present application includes the cold steel mesh feeding device proposed in any item of the above first aspect, it has all the beneficial effects of the cold steel mesh feeding device, which will not be elaborated here.

[0071] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0072] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present invention, unless otherwise clearly defined and limited, when the first feature is "on" or "under" the second feature, it may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, when the first feature is "above", "over" and "on top of" the second feature, it may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. When the first feature is "under", "beneath" and "underneath" the second feature, it may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0074] In the description of this specification, the descriptions of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0075] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A cold feeding steel mesh device, which is used in a mold for carrying molten steel, and a protective slag is formed on the surface of the molten steel in the mold. It is characterized in that, Comprising: A slag avoiding feeding component, which is arranged in the mold; A steel mesh, the slag avoiding feeding component enables the steel mesh to be immersed in the molten steel without contacting the mold powder; wherein, the steel mesh immersed in the molten steel is an arc-shaped steel mesh, and the concave surface formed by the arc-shaped steel mesh is opposite to the flowing direction of the molten steel.

2. The feeding cold steel mesh device according to claim 1, characterized in that, Further comprising: A vibration device, which contacts the steel mesh and is used to vibrate the steel mesh into the molten steel.

3. The feeding cold steel mesh device according to claim 1, characterized in that, Further comprising: A position adjusting component, which is connected to the slag avoiding feeding component and is used to adjust the position of the slag avoiding feeding component along the surface of the mold powder.

4. The feeding cold steel mesh device according to claim 3, characterized in that, The position adjusting component includes: A driving telescopic part, which is arranged between the slag avoiding feeding component and the wall of the mold cavity, and is used to adjust the horizontal position of the slag avoiding feeding component in the mold.

5. The feeding cold steel mesh device according to claim 3, characterized in that The position adjusting component includes: A limiting part, which is slidably installed on the mold along the edge of the molten steel, and the limiting part is connected to the slag avoiding feeding component and is used to move the limiting part and the slag avoiding feeding component together.

6. The feeding cold steel mesh device according to claim 1, characterized in that, The slag avoiding feeding component includes: A slag avoiding main body, which is arranged in the mold, and at least part of the slag avoiding main body is immersed in the molten steel; An arc-shaped immersion inlet, which is arranged at one end of the slag avoiding main body that does not contact the mold powder and the molten steel; An arc-shaped immersion outlet, which is arranged at one end of the slag avoiding main body immersed in the molten steel, and the arc-shaped immersion inlet is communicated with the arc-shaped immersion outlet; The steel mesh sequentially passes through the arc-shaped immersion inlet and the arc-shaped immersion outlet and then is immersed in the molten steel.

7. The feeding cold steel mesh device according to claim 6, characterized in that, The slag avoiding feeding component includes: A shaper, which is formed with an arc-shaped shaping hole through it, and is used for the steel mesh to pass through the arc-shaped shaping hole and then enter the arc-shaped immersion inlet.

8. The cold feeding steel mesh device according to any one of claims 1 to 7, characterized in that: There are at least two slag avoiding feeding components, and the slag avoiding feeding components are evenly distributed in the mold.

9. An operating method of a cold steel mesh feeding device, characterized in that, For operating the cold feeding steel mesh device according to any one of claims 1 to 8, the operation method includes: One end of the slag avoiding feeding component passes through the mold powder and is immersed in the molten steel, and the other end of the slag avoiding feeding component is located on the side of the mold powder away from the molten steel; Continuously blowing argon into the slag avoiding feeding component to form a positive pressure argon environment higher than the standard atmospheric pressure in the slag avoiding feeding component; Passing the steel mesh through the slag avoiding feeding component and immersing it in the molten steel in an arc shape; The vibration device contacts the steel mesh to vibrate the steel mesh into the molten steel.

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