WO2015188573A1

WO2015188573A1 - Continuous casting method and device with electromagnetic swirling nozzle

Info

Publication number: WO2015188573A1
Application number: PCT/CN2014/089881
Authority: WO
Inventors: 王强; 赫冀成; 李德伟; 苏志坚; 丸川雄净
Original assignee: 东北大学
Priority date: 2014-06-10
Filing date: 2014-10-30
Publication date: 2015-12-17
Also published as: KR20170010841A; KR101934495B1; JP6185666B2; JP2016524542A

Abstract

Disclosed is a continuous casting method with an electromagnetic swirling flow nozzle. The method comprises: before continuous casting, selecting an electromagnetic swirling device; installing the selected electromagnetic swirling device (3) between a tundish (1) and a crystallizer (4), the electromagnetic swirling device being capable of telescopic movements in a horizontal direction relative to a nozzle (2); when the continuous casting is carried out, moving the electromagnetic swirling device to the periphery of the nozzle; energizing the electromagnetic swirling device; according to process requirements, adjusting the current and frequency to enable the electromagnetic swirling device to generate a rotary electromagnetic field, the rotary electromagnetic field acting on molten steel in the nozzle to enable the molten steel in the nozzle to rotate; and finally obtaining uniform nozzle discharge. The present invention also relates to three electromagnetic swirling devices, including a two-sectional electromagnetic swirling device, an electromagnetic swirling device having an opening on one side and a closed magnetic circuit, and an electromagnetic swirling device having an opening on a single side, which satisfy the requirements of continuous casting with electromagnetic swirling and would not have a significant influence on the existing continuous casting processes.

Description

Electromagnetic swirl nozzle nozzle continuous casting method and device

Technical field

The invention belongs to the technical field of metallurgical continuous casting, and particularly relates to an electromagnetic swirling nozzle continuous casting method and device.

Background technique

In the continuous casting process, the main flow of the immersion nozzle is usually left and right swinging, that is, the uneven flow of the outlet in the crystallizer is uneven. As a result, the flow and temperature distribution in the crystallizer are uneven, resulting in liquid. A series of problems such as partial cooling of the surface, steel leakage and surface cracking of the slab; bias current will also cause fluctuation of the liquid level, especially as the casting speed of the continuous casting increases, the unevenness of the outlet is intensified, and the fluctuation of the liquid surface is intensified, thereby limiting The increase of the pulling speed; the biasing will also lead to the occurrence of eddy current slag near the nozzle and the shearing slag near the short side, resulting in serious slab quality defects such as subcutaneous pinholes, subcutaneous slag inclusions, coiled wire defects, etc. The production is difficult to avoid due to the following reasons:

(1) Inertia in the horizontal direction of molten steel: When the molten steel enters the immersion nozzle, there is a certain speed in the horizontal direction, so that the molten steel is unevenly distributed in the cross section of the nozzle, so that the molten steel flowing out of the nozzle is biased. ;

(2) Sliding nozzle control: The sliding nozzle that controls the flow of molten steel in continuous casting is usually in a semi-open state, so the flow direction of the molten steel injected downward into the immersion nozzle is not vertical, but obliquely downward. For this reason, the molten steel in the immersion nozzle will flow downward and swing into the crystallizer like a snake, and this flow is not a constant flow, that is, the molten steel is injected into the crystallizer through an unsteady flow path;

(3) Nodulation of inclusions: The inclusions present in the molten steel will adsorb on the inner surface of the nozzle when passing through the immersion nozzle, and locally grow and nodule, so that the molten steel is unevenly distributed on the cross section of the nozzle, forming a bias current;

(4) Reasons for operation: Misalignment may occur in the center of the immersion nozzle and the water inlet of the ladle, which may also cause a bias current.

In order to solve the slab quality defects caused by the bias flow, the technician developed a mechanical swirl nozzle, and the swirling flow of the molten steel nozzle is uniform and stable, although the flow and temperature distribution in the mold are improved to some extent, and the flow is reduced. The liquid level fluctuations improve the surface and internal quality of the slab, but the mechanical swirl nozzle is accompanied by the following serious defects:

(1) Refractory spiral blade Due to the low flushing life of molten steel, molten steel inclusions are easily adsorbed on the spiral blade and blockage occurs. Frequent replacement of the nozzle not only increases the cost, but also seriously affects production;

(2) The swirling speed of molten steel is proportional to the falling speed. In low-speed flow (such as low-speed casting), effective swirling flow cannot be obtained. That is, in the pouring stage, the ladle stage and the end of casting, the molten steel cannot obtain the necessary Swirling flow, its uniform temperature field, removal of inclusions and other functions will deteriorate sharply;

(3) The swirling method is not adjustable, and it is difficult to adapt to different process requirements, so the application is limited.

In view of the above-mentioned deficiencies of the mechanical swirling nozzle, the Chinese patent No. 200510047290.6 discloses an electromagnetic spin. In the water inlet, a rotating electromagnetic field is installed around the immersion nozzle to generate a swirling flow of molten steel in the nozzle, which can achieve the same effect of the mechanical swirling nozzle without clogging and life problems; at the same time, the swirling strength is more flexible and adaptable to different steels. The requirements for the shape of the continuous casting billet; basic research shows that the electromagnetic swirling nozzle can produce the same swirling strength of the mechanical swirling nozzle in the nozzle, and it is expected to obtain the same metallurgical effect.

However, the electromagnetic swirling nozzle needs to arrange an electromagnetic swirling device around the nozzle, which is limited by the continuous casting process, the space around the crystallizer is narrow, and the space between the tundish and the crystallizer is also limited; although three structures are disclosed in the patent. The electromagnetic swirling device of the form is specifically a 360-degree integral ring structure, a 180-degree semi-annular structure and a 360-degree split-type ring structure, but adopts a 360-degree integral ring-shaped electromagnetic swirling device to the existing company. The casting process will have a very large impact. The electromagnetic swirling device with a 180 degree semi-annular structure has a very low magnetic field efficiency. The electromagnetic cyclone device with a 360 degree split ring structure will cause the water circuit system to be large and need to be separate. Design a set of opening and closing and supporting devices, and the device is still 360-degree ring after closing, which has a serious impact on the addition of on-site protective slag; and the patented electromagnetic swirling device has a lower magnetic field frequency, so a larger current is required to generate Strong magnetic fields lead to large energy inputs.

For the above reasons, the existing electromagnetic swirling device must be redesigned to meet the requirements of electromagnetic swirl continuous casting without greatly affecting the existing continuous casting process.

Summary of the invention

In view of the problems existing in the prior art, the present invention provides an electromagnetic swirl nozzle casting method and apparatus capable of satisfying the requirements of electromagnetic swirl continuous casting without greatly affecting the existing continuous casting process, and simultaneously satisfying the circle Continuous casting requirements for billets, billets and slabs.

In order to achieve the above object, the present invention adopts the following technical solution: an electromagnetic swirl nozzle continuous casting method, comprising the following steps:

Step 1: Before performing continuous casting, according to different continuous casting processes, an electromagnetic swirling device is selected;

Step 2: installing the selected electromagnetic swirling device between the tundish and the crystallizer, and the electromagnetic swirling device can be telescopically moved in the horizontal direction with respect to the nozzle;

Step 3: When performing continuous casting, move the electromagnetic swirling device to the periphery of the nozzle;

Step 4: energize the electromagnetic swirling device, adjust the current and frequency according to the process requirements, and cause the electromagnetic swirling device to generate a rotating electromagnetic field;

Step 5: Rotate the electromagnetic field to act on the molten steel in the nozzle, so that the molten steel in the nozzle rotates, and finally obtain a uniform nozzle outflow.

The electromagnetic swirling device has the following three types:

The first type: two-lobed electromagnetic swirling device;

The second type: an electromagnetic swirling device with one side opening and a magnetic circuit closed;

The third type: electromagnetic swirling device with one side opening.

The two-lobed electromagnetic swirling device comprises an electromagnetic swirling device body, an opening and closing control mechanism and a supporting device, and a winding is arranged in the electromagnetic swirling device body; the electromagnetic swirling device body is composed of a left half shell And the right half shell, the left half shell and the right half shell are two symmetrical semicircular ring structures, and the left half shell is provided with the water inlet, the water outlet and the binding post of the left half shell, in the right half The housing is provided with a water inlet, a water outlet and a binding post of the right half housing, and one ends of the left and right housings are connected by a hinge connection, and the opposite side walls of the other end are respectively provided with a left half slot and Right half through groove; after the left half shell and the right half shell are closed, the electromagnetic swirling device body has a circular ring shape, and the left half through groove and the right half through groove form a through hole, that is, a slag addition port; the left half case And the non-hinge joint of the right half shell is respectively connected with the opening and closing control mechanism; the support device comprises a support rod, one end of the support rod is fixedly hinged on the hinge joint, and the other end is fixedly connected with the tundish beam; the support The rod is a telescopic structure, with the support rod and the tundish beam By tundish between fixed plate is fixedly connected to the cross member.

An ear plate is respectively disposed on the left half shell and the right half shell, and the opening and closing control mechanism is connected to the left half shell and the right half shell through the ear plate; the winding of the electromagnetic swirling device body is adopted a cogging type concentrated winding or a ring winding; the opening and closing control mechanism is composed of a first link, a second link and a third link, and the first link, the second link and the third link The inner end is hinged, the outer end of the first link is hinged to the ear plate of the left half case, and the outer end of the third link is hinged to the ear plate of the right half case.

The electromagnetic swirling device with one side opening and magnetic circuit closing includes an electromagnetic swirling device body having an opening on one side, a magnetic circuit compensating device and a supporting device, and a winding is disposed in the electromagnetic swirling device body; The magnetic circuit compensating device is made of a refractory-wrapped iron core disposed at an opening of the electromagnetic swirling device body to form a closed magnetic circuit structure together with the electromagnetic swirling device body; the supporting device includes a support rod and a support rod One end is fixedly connected with the electromagnetic swirling device body, and the other end is fixedly connected with the tundish beam. The support rod is a telescopic structure, and the supporting rod and the tundish beam are fixedly connected by a fixed steel plate of the tundish beam.

The electromagnetic swirling device body and the magnetic circuit compensating device are connected by a hinge connection, and the closed magnetic circuit structure formed by the magnetic circuit compensating device and the electromagnetic swirling device body has a circular or horseshoe shape; the magnetic circuit compensating device The outside is air-cooled, water-cooled or oil-cooled.

The one-side open electromagnetic swirling device comprises an electromagnetic swirling device body having an opening on one side and a supporting device. The electromagnetic swirling device body is provided with a core and a winding, and the iron core is an tooth having an opening on one side. a slot type, the opening of the iron core corresponding to the opening of the body of the electromagnetic swirling device, the winding is wound on the iron core; the supporting device comprises a supporting rod, one end of the supporting rod is fixedly connected with the body of the electromagnetic swirling device, and the other end is The tundish beam is fixedly connected, the support bar is a telescopic structure, and the support bar and the tundish beam are fixedly connected by a fixed steel plate of the tundish beam.

The iron core has three protruding teeth, wherein the outer two teeth are symmetrically distributed on both sides of the immersion nozzle, and the non-open side of the iron core is linear or curved; the winding is wound around the iron core Highlighted teeth.

The beneficial effects of the invention:

1. The electromagnetic swirling nozzle continuous casting method and device of the invention can ensure that the electromagnetic swirling device can be quickly moved to a suitable position around the nozzle during continuous casting to meet the requirements of electromagnetic swirl continuous casting, and will not be present. The continuous casting process has the effect of ensuring the smooth running of the electromagnetic swirl continuous casting; when the continuous casting is stopped or the nozzle is replaced, the electromagnetic swirling device can be quickly removed from the nozzle, and the electromagnetic swirling device can be realized. Rapid recovery when not in use; when the electromagnetic swirl device acts on the nozzle area, the magnetic field frequency in the nozzle can be up to 800 Hz, so that a high frequency can achieve a strong swirling effect with a small current, thereby reducing energy input. .

2. The two-lobed electromagnetic swirling device used in the invention can ensure the closure of the magnetic field circuit to the utmost extent, and can generate a strong magnetic field in the immersion nozzle, which can make the molten steel produce strong rotation in the immersion nozzle. Effectively improve the uniformity and stability of the outflow of the nozzle, thereby improving the flow and heat transfer behavior of the molten steel in the mold, and improving the quality of the continuous casting blank; the design of the protective slag addition port is not correct under the premise of ensuring the magnetic field strength. The continuous casting process added to the on-site slag has a great influence, which can ensure the smooth progress of continuous casting.

3. The electromagnetic swirling device with one side opening and magnetic circuit closed adopting the invention, the magnetic circuit compensating device ensures the closing of the magnetic field circuit, and a strong magnetic field can be generated in the intrusive nozzle, so that the molten steel can be made in the immersion nozzle The strong rotation inside can effectively improve the uniformity and stability of the nozzle outflow, thereby improving the flow and heat transfer behavior of the molten steel in the mold and improving the quality of the continuous casting billet.

4. The electromagnetic swirling device with single-side opening adopted by the invention has a large winding space, can ensure sufficient electromagnetic swirling intensity, meets the electromagnetic swirling intensity, and can make the molten steel generate strong rotation in the immersion nozzle. It can effectively improve the uniformity and stability of the outflow of the nozzle, thereby improving the flow and heat transfer behavior of the molten steel in the crystallizer, and improving the quality of the continuous casting blank; since the electromagnetic swirling device with one side opening is located during the electromagnetic swirling operation The side of the immersion nozzle provides sufficient space on the other side for the site worker to observe the crystallizer level, pick the slag and add the mold flux.

DRAWINGS

1 is a schematic view of a continuous casting apparatus of an electromagnetic swirl nozzle continuous casting method to which the present invention is applied;

2 is a schematic structural view of a two-lobed electromagnetic swirling device of the present invention;

Figure 3 is a side view of Figure 2;

4(a) and 4(b) are electromagnetic swirling devices with one side opening and magnetic circuit closed according to the present invention;

Figure 5 is a side view of Figure 4 (a);

6 is a schematic structural view of an electromagnetic swirling device with a single side opening;

Figure 7 is a side view of Figure 6;

8(a) and 8(b) are schematic diagrams showing the structure of the iron core and the winding of the electromagnetic swirling device with one side opening;

In the figure, 1 - tundish, 2 - nozzle, 3 - electromagnetic swirling device, 4 - crystallizer, 5 - electromagnetic swirling device body, 6 - hinge connection, 7 - ear plate, 8 - first link, 9 - second link, 10 - third link, 11 - support bar, 12 - fixed steel plate with tundish beam, 13 - tundish beam, 14—Magnetic circuit compensation device, 15-core, 16-winding, 17-tooth.

detailed description

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

An electromagnetic swirl nozzle continuous casting method comprises the following steps:

Step 1: Before continuous casting, according to different continuous casting process, an electromagnetic swirling device 3 is selected;

Step 2: The selected electromagnetic swirling device 3 is installed between the tundish 1 and the crystallizer 4, and the electromagnetic swirling device 3 can be telescopically moved in the horizontal direction with respect to the nozzle 2;

Step 3: When performing continuous casting, move the electromagnetic swirling device 3 to the periphery of the nozzle 2;

Step 4: energizing the electromagnetic swirling device 3, adjusting the current and frequency according to the process requirements, so that the electromagnetic swirling device 3 generates a rotating electromagnetic field;

Step 5: Rotating the electromagnetic field to act on the molten steel in the nozzle 2, so that the molten steel in the nozzle 2 is rotated, and finally a uniform nozzle outlet is obtained. The suitable continuous casting device is shown in FIG.

The electromagnetic swirling device 3 has the following three types:

The first type: two-lobed electromagnetic swirling device;

The third type: electromagnetic swirling device with one side opening.

As shown in FIG. 2 and FIG. 3, the two-lobed electromagnetic swirling device includes an electromagnetic swirling device body 5, an opening and closing control mechanism and a supporting device, and a winding is disposed in the electromagnetic swirling device body 5; The electromagnetic swirling device body is composed of a left half shell and a right half shell, the left half shell and the right half shell are two symmetrical semicircular ring structures, and the left half shell is provided with a water inlet of the left half shell. The water outlet and the binding post are provided with a water inlet, a water outlet and a binding post of the right half shell on the right half shell, and one ends of the left and right half shells are connected by a hinge connection, and the opposite side of the other end The left half through groove and the right half through groove are respectively opened on the wall; after the left half case and the right half case are closed, the electromagnetic swirling device body 5 has a circular shape, and the left half through groove and the right half through groove form a through hole. , the slag addition port; the non-hinge joints of the left and right half shells are respectively connected with the opening and closing control mechanism; the support device comprises a support rod 11 , and one end of the support rod 11 is fixedly hinged at the hinge joint 6 The other end is fixedly connected to the tundish beam 13; the support rod 11 is a telescopic structure The fixed plate 13 between the support bars 11 and the tundish through the tundish cross member 12 fixedly connected to the cross member.

An ear plate 7 is respectively disposed on the left half casing and the right half casing, and the opening and closing control mechanism is connected to the left half casing and the right half casing through the ear plate 7; the electromagnetic swirling device body 5 is The winding is a cogging type concentrated winding or a ring winding; the opening and closing control mechanism is composed of a first connecting rod 8, a second connecting rod 9 and a third connecting rod 10, the first connecting rod 8 and the second connecting unit The rod 9 is hinged to the inner end of the third link 10, and the outer end of the first link 8 is hinged to the ear plate 7 of the left half casing, and the third link 10 The outer end is hinged to the ear plate 7 of the right half of the housing.

As shown in FIGS. 4(a), 4(b) and 5, the electromagnetic swirling device with one side opening and magnetic circuit closed includes an electromagnetic swirling device body 5 having an opening on one side, and a magnetic circuit compensating device 14. And a supporting device, wherein the electromagnetic swirling device body 5 is provided with a winding; the magnetic circuit compensating device 14 is made of a refractory-wrapped iron core, which is disposed at the opening of the electromagnetic swirling device body 5, and the electromagnetic rotating The flow device body 5 together form a closed magnetic circuit structure; the support device includes a support rod 11 having one end fixedly connected to the electromagnetic swirl device body 5 and the other end fixedly connected to the tundish cross member 13, the support rod 11 In the case of a telescopic structure, the support rod 11 and the tundish beam 13 are fixedly connected by a fixed steel plate 12 of a tundish cross member.

The electromagnetic swirling device body 5 and the magnetic circuit compensating device 14 are connected by a hinge connection 6, and the closed magnetic circuit structure formed by the magnetic circuit compensating device 14 and the electromagnetic swirling device body 5 has a circular or horseshoe shape; The outer side of the magnetic circuit compensating device 14 is air-cooled, water-cooled or oil-cooled.

As shown in Figures 6, 7, 8(a) and 8(b), the one-side open electromagnetic swirling device comprises an electromagnetic swirling device body 5 having an opening on one side and a supporting device in the electromagnetic swirling The apparatus body 5 is provided with a core 15 and a winding 16 which is a slot type having an opening on one side, the opening of the core 15 corresponding to the opening of the body of the electromagnetic swirling device 5, and the winding 16 is placed on the core The support device includes a support rod 11 . One end of the support rod 11 is fixedly connected to the electromagnetic swirling device body 5 , and the other end is fixedly connected to the tundish beam 13 . The support rod 11 is a telescopic structure, and the support rod 11 is supported. The fixed steel plate 12 is connected to the tundish beam 13 by a tundish cross member.

The iron core 15 has three protruding teeth 17, wherein the outer two teeth 17 are symmetrically distributed on both sides of the submerged nozzle 2, and the non-opening side of the iron core 15 is linear or curved; the winding 16 is wound Placed on the three protruding teeth 17 of the core 15.

Example 1

The utility model adopts a two-valve intrusive nozzle electromagnetic swirling device to perform electromagnetic swirl continuous casting. In the embodiment, the power supply cabinet for supplying power to the electromagnetic swirling device can provide a current of 0 to 800 Hz and 0 to 1000 A, which can The magnetic field is rotated clockwise or counterclockwise; as shown in Figures 2 and 3, the height h of the electromagnetic swirling device body 5 is 80 to 500 mm, the inner diameter r is 25 to 150 mm, the outer diameter R is 80 to 500 mm, and the opening and closing angle α is 10°～180°, the distance X1 from the center of the body of the electromagnetic swirling device to the lowermost end of the ear plate 7 is 100-1000 mm, and the support rod 11 can adopt a pneumatic transmission telescopic rod or a mechanical transmission telescopic rod, and the telescopic length range X2 is 600～ 2000mm, the length of the control end of the opening and closing control mechanism X3 is 200 ~ 500mm, can be driven by pneumatic, mechanical or gear.

In use, first pull the second link 9 of the opening and closing control mechanism to open the left and right half shells, then adjust the length of the support rod 11 to set the electromagnetic swirling device body 5 in the middle of the immersion nozzle 2 On the outer side of the area, finally, the second link 9 of the opening and closing control mechanism is pushed to close the left and right half shells, and the power cabinet supplies power to the electromagnetic swirling device to form a closed magnetic field loop, thereby realizing electromagnetic rotation. Continuous casting.

Example 2

Electromagnetic cyclone continuous casting is performed by an electromagnetic swirling device with one side opening and magnetic circuit closing. In the present embodiment, the power supply cabinet for supplying power to the electromagnetic swirling device can provide a current of 0 to 800 Hz and 0 to 1000 A. The magnetic field can be rotated clockwise or counterclockwise; as shown in Figures 4(a), 4(b) and 5, the height h of the electromagnetic swirling device body 5 is 80-500 mm, and the width at the opening is 30-200 mm. The support rod 11 can adopt a pneumatic transmission telescopic rod or a mechanical transmission telescopic rod, and the telescopic length ranges from 600 to 2000 mm.

In use, firstly, the magnetic circuit compensating device 14 is opened by the hinge connection 6, the length of the support rod 11 is adjusted, and the electromagnetic swirling device body 5 is disposed at the periphery of the submerged nozzle 2 through the opening of one side thereof, and then the magnetic circuit compensating device is further disposed. 14 is closed, the power cabinet supplies power to the electromagnetic swirling device, so that a closed magnetic field loop is formed between the magnetic circuit compensating device 14 and the electromagnetic swirling device body 5, and electromagnetic swirl continuous casting is realized.

Example 3

Electromagnetic cyclone continuous casting is performed by using an electromagnetic swirling device with a single-side opening. In this embodiment, a power supply cabinet for supplying power to the electromagnetic swirling device can provide a current of 0 to 800 Hz and 0 to 1000 A, which can generate a magnetic field. Rotating clockwise or counterclockwise; as shown in Figures 6, 7, 8(a), 8(b), the height h of the electromagnetic swirling device body 5 is 80-500 mm, and the width x at the opening is 30-200 mm, supporting The rod 11 can adopt a pneumatic transmission telescopic rod or a mechanical transmission telescopic rod, and the telescopic length ranges from 600 to 2000 mm.

In use, by adjusting the length of the support rod 11, the electromagnetic swirling device body 5 is disposed at the periphery of the immersion nozzle 2 through its opening. At this time, the power cabinet supplies power to the electromagnetic swirling device, and the electromagnetic swirling device generates a rotating electromagnetic field. Electromagnetic swirl continuous casting.

The embodiments of the present invention are not intended to limit the scope of the invention, and the equivalents and modifications of the invention are not included in the scope of the invention.

Claims

An electromagnetic swirl nozzle continuous casting method, comprising the following steps:

Step 1: Before continuous casting, according to different continuous casting processes, an electromagnetic swirling device is selected;

Step 2: installing the selected electromagnetic swirling device between the tundish and the crystallizer, and the electromagnetic swirling device can be telescopically moved in the horizontal direction with respect to the nozzle;

Step 3: When performing continuous casting, move the electromagnetic swirling device to the periphery of the nozzle;

Step 4: energize the electromagnetic swirling device, adjust the current and frequency according to the process requirements, and cause the electromagnetic swirling device to generate a rotating electromagnetic field;

Step 5: Rotate the electromagnetic field to act on the molten steel in the nozzle, so that the molten steel in the nozzle rotates, and finally obtain a uniform nozzle outflow.
The electromagnetic swirl nozzle continuous casting method according to claim 1, wherein the electromagnetic swirling device comprises the following three types:

The first type: two-lobed electromagnetic swirling device;

The second type: an electromagnetic swirling device with one side opening and a magnetic circuit closed;

The third type: electromagnetic swirling device with one side opening.
An electromagnetic swirling device, characterized in that: the two-lobed electromagnetic swirling device comprises an electromagnetic swirling device body, a opening and closing control mechanism and a supporting device, and a winding is arranged in the electromagnetic swirling device body; The electromagnetic swirling device body is composed of a left half shell and a right half shell, the left half shell and the right half shell are two symmetrical semicircular ring structures, and the left half shell is provided with a left half shell. The nozzle, the water outlet and the binding post are provided with a water inlet, a water outlet and a binding post of the right half shell on the right half shell, and one ends of the left half shell and the right half shell are connected by a hinge connection, and the other end is opposite The left side half slot and the right half slot groove are respectively formed on the side wall; after the left half shell and the right half shell are closed, the electromagnetic swirling device body has a circular ring shape, and the left half through groove and the right half through groove form a through hole. , the slag addition port; the non-hinge joints of the left and right half shells are respectively connected with the opening and closing control mechanism; the support device comprises a support rod, one end of the support rod is fixedly hinged on the hinge connection, and the other One end is fixedly connected with the tundish beam; the support rod is Shrink structure, the support bar is fixed between the plate and the tundish through the tundish cross beam fixedly connected.
The electromagnetic swirling device according to claim 3, wherein an ear plate is respectively disposed on the left half casing and the right half casing, and the opening and closing control mechanism passes through the ear plate and the left half casing and the right half The housing is connected; the winding of the electromagnetic swirling device adopts a cogging type concentrated winding or a ring winding; the opening and closing control mechanism is composed of a first connecting rod, a second connecting rod and a third connecting rod. The inner ends of the first link, the second link and the third link are hinged, the outer end of the first link is hinged to the ear plate of the left half case, and the outer end and the right half of the third link are The body's ear plates are hinged.
An electromagnetic swirling device characterized in that: the electromagnetic swirling device with one side opening and magnetic circuit closing includes an electromagnetic swirling device body having an opening on one side, a magnetic circuit compensating device and a supporting device, and the electromagnetic rotating Flow device body setting a winding circuit; the magnetic circuit compensating device is made of a refractory-wrapped iron core disposed at an opening of the electromagnetic swirling device body to form a closed magnetic circuit structure together with the electromagnetic swirling device body; the supporting device includes a support rod, one end of the support rod is fixedly connected with the electromagnetic swirling device body, and the other end is fixedly connected with the tundish beam, the support rod is a telescopic structure, and the support rod and the tundish beam are fixed by a fixed steel plate of the tundish beam connection.
The electromagnetic swirling device according to claim 5, wherein the electromagnetic swirling device body and the magnetic circuit compensating device are connected by a hinge connection, and the magnetic circuit compensating device and the electromagnetic swirling device body form a closed magnetic body. The shape of the road structure is circular or horseshoe shape; the outer side of the magnetic circuit compensating device is air-cooled, water-cooled or oil-cooled.
An electromagnetic swirling device characterized in that: the electromagnetic swirling device with one side opening comprises an electromagnetic swirling device body having an opening on one side and a supporting device, and an iron core is arranged in the body of the electromagnetic swirling device a winding, the iron core is a slotted type having an opening on one side, the opening of the iron core corresponding to the opening of the body of the electromagnetic swirling device, the winding is wound on the iron core; the supporting device comprises a support rod, one end of the support rod and The electromagnetic swirling device body is fixedly connected, and the other end is fixedly connected with the tundish beam. The support rod is a telescopic structure, and the supporting rod and the tundish beam are fixedly connected by a fixed steel plate of the tundish beam.
The electromagnetic swirling device according to claim 7, wherein the core has three protruding teeth, wherein two outer teeth are symmetrically distributed on both sides of the immersion nozzle, and the non-opening side of the iron core is Straight or curved; the windings are wound around the three protruding teeth of the core.