Continuous casting integral water gap electromagnetic stirring device and equipment

Abstract

The utility model discloses a continuous casting integral water gap electromagnetic stirring device and continuous casting integral water gap electromagnetic stirring equipment. The continuous casting integral water gap electromagnetic stirring device comprises a magnetic induction assembly (1) arranged on the outer side of an integral water gap (2), the magnetic induction assembly (1) is arranged to be capable of forming a magnetic field in the integral water gap (2), and the magnetic field direction of the magnetic field is from bottom to top. According to the continuous casting integral water gap electromagnetic stirring device, the injection flow movement of molten steel in the integral water gap can gently and uniformly wash the solidification front edge, the impact depth of the injection flow is effectively reduced, the intense turning of the liquid level of a crystallizer is not caused, the flowing of the molten steel in the crystallizer is controlled, the water gap bias flow inhibition effect the same as that of a rotational flow rotor is achieved, and the service life of the crystallizer is prolonged. The flowing state and heat flow distribution of the injection flow in the crystallizer are improved, and a blank shell in the crystallizer is promoted to grow faster and more uniformly.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting steel billet production, in particular to a continuous casting integral water nozzle electromagnetic stirring device and equipment. Background Art

[0002] In the process of continuous casting steel billet production, reasonable control of the flow field of molten steel in the crystallizer is beneficial to refine the solidification structure of the continuous casting billet, reduce surface and internal defects, and improve the processing performance and service life of steel products. Since the molten steel in the ladle enters the crystallizer from the tundish through the immersed nozzle, the problem of bias flow in the nozzle is an important factor affecting the unstable flow of molten steel in the crystallizer. The existing technology can effectively suppress the bias flow in the nozzle by changing the structure of the tundish or immersed nozzle to make the molten steel in the nozzle rotate. However, the mechanical nozzle swirl method has problems such as the deposition of inclusions at different positions of the immersed nozzle and the swirl generator, and the rotation speed of the molten steel cannot be freely adjusted according to the requirements of the continuous casting process.

[0003] Furthermore, the crystallizer electromagnetic stirring (M-EMS) is widely used in the continuous casting of square and round billets as a crystallizer flow control technology. The forced flow caused by the rotating magnetic field can reduce the impact depth of the molten steel in the crystallizer, causing the hot zone of the molten steel to move upward, and can increase the equiaxed crystal structure and uniform solute element distribution. However, the equiaxed crystal structure in the continuous casting billet will not increase infinitely with the increase of the M-EMS current intensity, and when the stirring of the M-EMS is too strong, the secondary flow caused by the rotating magnetic field will transfer the solute elements to the rotation center, worsening the macro segregation defects. However, the equipment used in the electromagnetic braking technology is huge, and the commonly used steady magnetic field cannot play a role in the non-steady-state casting process. After the continuous casting billet leaves the crystallizer, the pulsed magneto-oscillation solidification homogenization technology, the electromagnetic stirring technology in the second cooling zone, and the electromagnetic stirring technology at the end of solidification can achieve the purpose of reducing the looseness and shrinkage defects of the continuous casting billet and reducing the severity of segregation by promoting nucleation, breaking dendrites or compensating for the solidification shrinkage of the molten steel, but it still cannot solve the problem of water inlet deviation in the crystallizer. Utility Model Content

[0004] The purpose of the utility model is to provide an electromagnetic stirring device for a continuous casting integral water nozzle, which can make the injection movement of molten steel in the integral water nozzle gently and evenly flush the solidification front, effectively reduce the impact depth of the injection without causing strong overturning of the liquid surface of the crystallizer, control the flow of molten steel in the crystallizer, have the same water nozzle deviation suppression effect as the swirl rotor, improve the flow state and heat flow distribution of the injection in the crystallizer, and promote faster and more uniform growth of the billet shell in the crystallizer.

[0005] In order to achieve the above-mentioned objectives, the utility model provides, on the one hand, a continuous casting integrated water nozzle electromagnetic stirring device, which includes a magnetic induction component arranged on the outside of the integrated water nozzle, and the magnetic induction component is configured to be able to form a magnetic field in the integrated water nozzle, and the magnetic field direction of the magnetic field is from bottom to top.

[0006] Preferably, the magnetic induction components are a pair.

[0007] Preferably, a pair of the magnetic induction components are symmetrically arranged on the outside of the integral water outlet.

[0008] On the other hand, the utility model provides a continuous casting integral water nozzle electromagnetic stirring equipment, which includes the continuous casting integral water nozzle electromagnetic stirring device as mentioned above, and the continuous casting integral water nozzle electromagnetic stirring device is installed between the middle bag and the crystallizer to electromagnetically stir the integral water nozzle.

[0009] Preferably, a fixed hook is provided below the bottom of the tundish, and the magnetic induction component is mounted on the fixed hook.

[0010] Preferably, the fixing hook is fixed on the tundish by welding.

[0011] Preferably, there are four fixing hooks and they are evenly arranged along the circumferential direction.

[0012] Preferably, the continuous casting integral water nozzle electromagnetic stirring device is detachably mounted on a frame, and the frame is arranged on both sides of the integral water nozzle.

[0013] Preferably, a universal wheel with a lock is provided at the bottom of the frame.

[0014] Preferably, a push-pull handle is provided on the frame, and the push-pull handle is wrapped with a handheld anti-slip strip.

[0015] According to the above technical scheme, in view of the limitations of the crystallizer flow field control technology, the utility model uses electromagnetic swirl water nozzle technology, that is, an electromagnetic device is installed outside the immersion water nozzle, and the Lorentz force generated by the rotating magnetic field is used to stir the molten steel in the water nozzle, thereby controlling the flow characteristics of the molten steel in the crystallizer. It realizes the contactless driving of the molten steel in the crystallizer to rotate, avoiding secondary pollution to the molten steel; it can also freely adjust the stirring intensity of the molten steel according to the continuous casting production requirements; in addition, it can also control the molten steel flow field in the crystallizer alone or in coordination with M-EMS, so that the molten steel injection movement in the whole water nozzle should be able to gently and evenly wash the solidification front, effectively reduce the impact depth of the injection flow without causing strong turbulence of the crystallizer liquid surface, control the flow of molten steel in the crystallizer, have the same water nozzle deviation suppression effect as the swirl rotor, improve the flow state and heat flow distribution of the injection flow in the crystallizer, and promote the faster and more uniform growth of the shell in the crystallizer.

[0016] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation to the present invention. In the accompanying drawings:

[0018] Figure 1 It is a structural schematic diagram of the continuous casting integral water nozzle electromagnetic stirring device provided by the utility model;

[0019] Figure 2 It is a schematic diagram of the installation of the electromagnetic stirring device of the continuous casting integral water nozzle in the electromagnetic stirring device of the continuous casting integral water nozzle provided by the utility model;

[0020] Figure 3 The utility model is a schematic diagram of the structure of a frame in the continuous casting integral water nozzle electromagnetic stirring equipment provided by the utility model.

[0021] Description of Reference Numerals

[0022] 1-Magnetic induction component 2-Integral water outlet

[0023] 3-Frame 4-Universal wheel DETAILED DESCRIPTION

[0024] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0025] In the present utility model, unless otherwise stated, directional words such as "upper, lower, top, bottom" contained in a term merely represent the orientation of the term in normal usage, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0026] join Figure 1 The utility model provides an electromagnetic stirring device for a continuous casting integral water nozzle, which includes a magnetic induction component 1 arranged on the outside of the integral water nozzle 2. The magnetic induction component 1 is configured to form a magnetic field in the integral water nozzle 2, and the magnetic field direction of the magnetic field is from bottom to top.

[0027] Through the above technical scheme, in view of the limitations of the crystallizer flow field control technology, the electromagnetic swirl nozzle technology is used, that is, an electromagnetic device is installed outside the immersion nozzle, and the Lorentz force generated by the rotating magnetic field is used to stir the molten steel in the nozzle, thereby controlling the flow characteristics of the molten steel in the crystallizer. The molten steel in the crystallizer is driven to rotate without contact to avoid secondary pollution of the molten steel; the stirring intensity of the molten steel can also be freely adjusted according to the continuous casting production requirements; in addition, the molten steel flow field in the crystallizer can be controlled alone or in coordination with M-EMS, so that the molten steel injection movement in the overall nozzle 2 can gently and evenly flush the solidification front, effectively reducing the impact depth of the injection without causing strong turbulence of the crystallizer liquid surface, controlling the flow of molten steel in the crystallizer, having the same nozzle bias flow suppression effect as the swirl rotor, improving the flow state and heat flow distribution of the injection in the crystallizer, and promoting the faster and more uniform growth of the shell in the crystallizer.

[0028] In this embodiment, in order to optimize the electromagnetic stirring effect of the continuous casting integral water nozzle electromagnetic stirring device, preferably, the magnetic induction component 1 is a pair.

[0029] Furthermore, in order to optimize the position of the pair of magnetic induction components 1 , it is preferred that the pair of magnetic induction components 1 are symmetrically arranged on the outside of the integral water inlet 2 .

[0030] After adopting the above technical solution, that is, adding a magnetic induction device outside the integral nozzle 2, the direction of the magnetic field is a movement from bottom to top, which can ensure that the molten steel moves in the integral nozzle in a certain direction following the magnetic field, thereby reducing the impact of the molten steel on the crystallizer:

[0031] First, purify the molten steel. The electromagnetic field technology can effectively purify the molten steel in the tundish, remove impurities and non-metallic inclusions, and thus improve the quality of the steel;

[0032] Second, flow control and stirring. Through the electromagnetic swirl nozzle technology, an electromagnetic device can be installed on the outside of the submerged nozzle, and the electromagnetic force is used to make the molten steel in the nozzle rotate in a non-contact manner. This technology has the same effect on improving the quality of continuous casting billets as the electromagnetic stirring of the crystallizer, and can work in conjunction with the electromagnetic stirring of the crystallizer to further improve the quality of continuous casting billets;

[0033] Third, solidification structure control. Electromagnetic field technology can regulate the solidification structure. By controlling the magnetic field, it can affect the solidification process of steel, thereby improving the organizational structure and performance of steel;

[0034] Fourth, solid-state phase transformation and organization control. Under the electromagnetic field, the solid-state phase transformation and organization of steel can be controlled, which is crucial to ensure the microstructure and performance of steel;

[0035] Fifth, multi-mode customized magnetic field. In order to meet the requirements of complex states in high-quality steel continuous casting, the concept of multi-mode customized magnetic field is proposed in the field of electromagnetic field control flow field.

[0036] In addition, the utility model also provides a continuous casting integral water nozzle electromagnetic stirring device, which installs the continuous casting integral water nozzle electromagnetic stirring device as mentioned above between the tundish and the crystallizer to electromagnetically stir the integral water nozzle 2.

[0037] Specifically, in one embodiment, a fixed hook may be provided below the bottom of the tundish, and the magnetic induction assembly 1 is mounted on the fixed hook. At the same time, the fixed hook is welded and fixed to the tundish. It is further preferred that there are four fixed hooks and they are evenly arranged in the circumferential direction. In this way, the magnetic induction device can be well surrounded around the entire nozzle.

[0038] In another embodiment, the continuous casting integral nozzle electromagnetic stirring device can be detachably mounted on a frame 3, and the frame 3 is arranged on both sides of the integral nozzle 2. When in use, the magnetic induction component 1 can be set by placing the frame 3 at a preset position, and the electromagnetic stirring operation can be smoothly performed.

[0039] In order to facilitate the overall movement of the frame 3 and the magnetic induction component 1, a universal wheel 4 with a lock is preferably provided at the bottom of the frame 3. In this way, the position of the magnetic induction component 1 can be easily adjusted according to the specific conditions of the use environment, so as to avoid the magnetic induction component 1 from losing its original effectiveness due to misalignment.

[0040] In addition, when the frame 3 is pushed manually, in order to facilitate gripping and avoid slipping during hand operation, preferably, a push-pull handle is provided on the frame 3, and the push-pull handle is wrapped with a hand-held anti-slip strip.

[0041] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

[0042] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present utility model will not further describe various possible combinations.

[0043] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A continuous casting integral water nozzle electromagnetic stirring device, characterized in that: The continuous casting integral water nozzle electromagnetic stirring device comprises a magnetic induction component (1) arranged on the outside of the integral water nozzle (2), and the magnetic induction component (1) is configured to be able to form a magnetic field in the integral water nozzle (2), and the magnetic field direction of the magnetic field is from bottom to top; wherein the magnetic induction component (1) is a pair, and the pair of magnetic induction components (1) are symmetrically arranged on the outside of the integral water nozzle (2).

2. A continuous casting integral water nozzle electromagnetic stirring device, characterized in that: The continuous casting integral water nozzle electromagnetic stirring equipment comprises the continuous casting integral water nozzle electromagnetic stirring device as claimed in claim 1, and the continuous casting integral water nozzle electromagnetic stirring device is installed between the tundish and the crystallizer to electromagnetically stir the integral water nozzle (2).

3. The continuous casting integral nozzle electromagnetic stirring device according to claim 2, characterized in that: A fixed hook is provided below the bottom of the tundish, and the magnetic induction component (1) is mounted on the fixed hook.

4. The continuous casting integral nozzle electromagnetic stirring device according to claim 3, characterized in that: The fixing hook is fixed on the tundish by welding.

5. The continuous casting integral nozzle electromagnetic stirring device according to claim 3 or 4, characterized in that: There are four fixing hooks which are evenly arranged along the circumferential direction.

6. The continuous casting integral nozzle electromagnetic stirring device according to claim 2, characterized in that: The continuous casting integral water nozzle electromagnetic stirring device is detachably mounted on a frame (3), and the frame (3) is arranged on both sides of the integral water nozzle (2).

7. The continuous casting integral nozzle electromagnetic stirring device according to claim 6, characterized in that: A universal wheel (4) with a lock is provided at the bottom of the vehicle frame (3).

8. The continuous casting integral nozzle electromagnetic stirring device according to claim 6 or 7, characterized in that: The frame (3) is provided with a push-pull handle, and the push-pull handle is wrapped with a hand-held anti-slip strip.

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