CN112317707A - Side spiral electromagnetic stirring device - Google Patents
Side spiral electromagnetic stirring device Download PDFInfo
- Publication number
- CN112317707A CN112317707A CN202011183854.XA CN202011183854A CN112317707A CN 112317707 A CN112317707 A CN 112317707A CN 202011183854 A CN202011183854 A CN 202011183854A CN 112317707 A CN112317707 A CN 112317707A
- Authority
- CN
- China
- Prior art keywords
- magnetic yoke
- box body
- electromagnetic stirring
- yoke
- fixing plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention belongs to the technical field of continuous casting and semi-continuous casting, and particularly relates to a side spiral electromagnetic stirring device which comprises a box body, a magnetic yoke fixing plate arranged in the box body, a magnetic yoke connected with the magnetic yoke fixing plate, a coil wound outside the magnetic yoke, a box body cover fixed at the top of the box body through a fixing bolt, a power supply device and a cooling device arranged at the side part of the box body, and the side spiral electromagnetic stirring device is characterized in that the longitudinal inclination angle of a magnetic yoke body is-80 degrees, the transverse inclination angle is-40 degrees, a coil winding is arranged on an oblique magnetic yoke, and the end face of the magnetic yoke is parallel to the wall face of the magnetic yoke. The invention can enlarge the flow range of the circular flow, effectively increase the fluidity of molten metal in the casting blank, refine the grain structure, reduce the element segregation degree, promote the metal feeding at the solidification end, and particularly has direct influence on the actions of molten steel flow, heat transfer solidification, solute segregation and the like in the solidification process of the large-section continuous casting blank, thereby improving the core solidification quality of the large-section casting blank.
Description
Technical Field
The invention belongs to the technical field of continuous casting and semi-continuous casting, and particularly relates to a side spiral electromagnetic stirring device.
Background
In the production of steel, continuous casting is a solidification process for changing molten steel from liquid state to solid state, is one of the marked breakthrough technologies in the steel industry, and has the advantages of high production efficiency, low energy consumption, good quality stability, high comprehensive metal yield and the like. As a technical means widely adopted in continuous casting production, the continuous casting electromagnetic stirring technology is an electromagnetic metallurgy technology which is characterized in that different types of electromagnetic stirrers are arranged at different positions of a continuous casting machine, and the transmission behavior of a casting blank in a solidification process is strengthened by utilizing generated electromagnetic force so as to improve the quality of the casting blank.
The electromagnetic stirrer has a working principle similar to that of an asynchronous motor, and when alternating current is introduced into a stator winding of the stirrer, a rotating magnetic field surrounding a casting blank is generated, the magnetic field cuts the casting blank to generate induction current, and the induction current interacts with the rotating magnetic field to generate electromagnetic force, so that molten steel is driven to rotate and flow. Compared with methods such as air blowing stirring and mechanical stirring, electromagnetic stirring is in non-contact stirring, electric energy can be converted into kinetic energy of molten steel through electromagnetic induction without directly contacting with the molten steel, and the defect that impurities are brought in by contact stirring is avoided; the control is convenient, and the stirring intensity is controlled by adjusting the stirring parameters (the frequency and the intensity of the stirring current). According to the magnetic field form, continuous casting electromagnetic stirring can be roughly classified into rotating magnetic field type, traveling wave magnetic field type and screw type stirring. The magnetic field of rotatory magnetic field type and travelling wave magnetic field type stirring is radial and axial coverage little, can't satisfy the production of big section continuous casting billet, and ordinary combined type screw type stirring is with high costs, and occupation space is big, and the operation is complicated, can't satisfy actual space and production demand. The side spiral electromagnetic stirring device can enlarge the circulation flow range and the magnetic field coverage range, effectively increase the fluidity of molten metal in a casting blank, promote the feeding of solidified tail end metal, can be used for adjusting the device according to the actual production condition through a detachable design, and has the advantages of simple structure, small occupied space and convenience in operation.
Disclosure of Invention
The invention aims to provide a side spiral electromagnetic stirring device which can effectively enhance the fluidity of molten metal in a casting blank, enlarge the circulation flow range, refine the grain structure and improve the quality of a large-section casting blank.
The purpose of the invention is realized by the following technical scheme:
the invention discloses a side spiral electromagnetic stirring device, which comprises a box body, a magnetic yoke fixing plate arranged in the box body, a magnetic yoke connected with the magnetic yoke fixing plate, a coil wound outside the magnetic yoke, a box body cover fixed at the top of the box body through a fixing bolt, a power supply device and a cooling device arranged at the side part of the box body, and is characterized in that the longitudinal inclination angle of a magnetic yoke body is-80 degrees, the transverse inclination angle is-40 degrees, a coil winding is arranged on the oblique magnetic yoke, and the end surface of the magnetic yoke is parallel to the wall surface of the magnetic yoke fixing plate.
And a plurality of groups of magnetic yokes are connected on the magnetic yoke fixing plate.
The horizontal width of the magnetic yoke is 100 mm-400 mm.
The invention has the advantages that:
compared with the prior art, the side spiral electromagnetic stirring device can enlarge the flow range of circulation, effectively increase the fluidity of molten metal in a casting blank, refine the grain structure, reduce the element segregation degree, promote the feeding of solidification end metal, and particularly have direct influence on the behaviors of molten steel flow, heat transfer solidification, solute segregation and the like in the solidification process of a large-section continuous casting blank, thereby improving the core solidification quality of the large-section casting blank; yoke fixed plate and yoke intergroup are detachable to be connected, can change the yoke group of different inclinations according to the steel grade condition and the casting blank specification of actual production, and the structure of device is simple and easy, and is with low costs than combined type screw agitator, and occupation space is little, and is easy and simple to handle.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view of fig. 1 of the present invention.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
As shown in fig. 1 and 2, the side-screw electromagnetic stirring device of the present invention comprises a box body 6, a yoke fixing plate 1 arranged in the box body 6, a yoke 3 connected with the yoke fixing plate 1, a coil 2 wound outside the yoke 3, a box body cover 5 fixed on the top of the box body 6 through a fixing bolt 4, a power supply device 7 and a cooling device 8 arranged on the side of the box body 6, wherein the longitudinal inclination angle of the yoke 3 body is-80 to 80 degrees, the transverse inclination angle is-40 to 40 degrees, the coil 2 is wound on the oblique yoke 3, and the end face of the yoke 3 is parallel to the wall face of the yoke fixing plate 1.
And a plurality of groups of magnetic yokes 3 are connected on the magnetic yoke fixing plate 1.
The horizontal width of the magnetic yoke 3 is 100 mm-400 mm.
As shown in fig. 1 and 2: the side spiral electromagnetic stirring device comprises a magnetic yoke 3, a coil 2, a magnetic yoke fixing plate 1, a box body 6, a box body cover 5, fixing bolts 4, a power supply device 7 and a cooling device 8, wherein the coil 2 is wound on the inclined magnetic yoke 3, a plurality of groups of magnetic yokes 3 are connected with the magnetic yoke fixing plate 1, and the end surfaces of the magnetic yokes 3 are parallel to the wall surface of the magnetic yoke fixing plate 1. The box cover 5 is connected with the box 6 through the fixing bolt 4, and the cooling device 8 is installed below the power supply device 7 and controls the temperature of the coil 2.
The coil 2 generates an electromagnetic field, and the winding mode of the electromagnetic field directly influences the function and the efficiency of the electromagnetic stirrer. The coil 2 wire is selected based on current density, coil heat dissipation, power considerations, and the like. The copper wire can be formed by winding materials such as a copper wire, a hollow copper pipe and the like, and the inside of the copper wire can be cooled by cooling water. The stirring effect is influenced by the current and frequency of the coil 2, the current is in the range of 0-1500A and the frequency is in the range of 0-10 Hz according to production requirements.
The yoke 3 is generally made of soft iron, silicon steel and soft magnetic alloy having a relatively high magnetic permeability, and mainly plays a role in increasing the magnetic permeability, forming a magnetic circuit and fixing a coil. According to applicable occasions, materials such as pure iron, amorphous alloy materials, metal magnetic powder and the like are selected. According to the actual production situation, the magnet yoke groups with different inclinations are replaced, and the end surface of each magnet yoke 3 is parallel to the wall surface of the magnet yoke fixing plate 1.
The power supply 7 provides three-phase ac power with currents between adjacent windings that are 120 out of phase. The cooling device 8 is connected with both ends of the coil 2 to form a cooling loop. The box body 6 and the stirrer box cover 5 are made of non-magnetic stainless steel materials and are fixed by the fixing bolts 4 to protect the electromagnetic stirring device.
The following examples are carried out on the premise of the technical scheme of the invention, and detailed embodiments and specific operation processes are given, but the scope of the invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.
Examples
In this embodiment, the side-spiral electromagnetic stirring apparatus is produced by operating according to the following steps:
A. producing a round billet with the P91 steel grade and the section diameter of 800mm, wherein the drawing speed of a continuous casting machine is 0.23m/min, and molten steel is injected into a water-cooled crystallizer through a submerged nozzle; when the continuous casting starts, the secondary cooling system, the side spiral electromagnetic stirring device and the roller clamping device are automatically and synchronously started.
B. The average specific water amount of the secondary cooling system is 0.19L/kg, the magnetic yoke 3 of the side spiral electromagnetic stirring device adopts an inclination angle of 30 degrees in the longitudinal direction, the transverse inclination angle is 10 degrees, and the horizontal width of the magnetic yoke 3 is 300 mm; the current of the coil 2 is 850A, and the frequency is 6 Hz; the height of the magnetic yoke fixing plate 1 is 600 mm; the side spiral electromagnetic stirring device is arranged at the position where the thickness of the solidified layer of the casting blank is 65% of the equivalent diameter.
C. The round billet sequentially passes through the water-cooled crystallizer, the secondary cooling system, the roller clamping device and the casting electromagnetic stirrer and then enters the side spiral electromagnetic stirring device, electromagnetic stirring is carried out on a liquid core of the continuous casting billet by utilizing electromagnetic force generated by the stirrer, after passing through the side spiral electromagnetic stirring device, the round billet is supported by the dummy ingot to descend to a specified position and then stops pouring, flame cutting is carried out after the round billet is cooled to a specified temperature, and the cut round billet is output to a heat preservation pit by the output rod and slowly cooled to room temperature. By the aid of the side spiral electromagnetic stirring device, liquid metal in the central area of the large-section casting blank is solidified and contracted to supplement, grain structures are refined, isometric crystal rate is increased, defects of central shrinkage porosity, cracks, segregation and the like are overcome, and quality of the large-section casting blank is improved.
Compared with the prior art, the side spiral electromagnetic stirring device can enlarge the flow range of circulation, effectively increase the fluidity of molten metal in a casting blank, refine the grain structure, reduce the element segregation degree, promote the feeding of solidification end metal, and particularly have direct influence on the behaviors of molten steel flow, heat transfer solidification, solute segregation and the like in the solidification process of a large-section continuous casting blank, thereby improving the core solidification quality of the large-section casting blank; yoke fixed plate and yoke intergroup are detachable to be connected, can change the yoke group of different inclinations according to the steel grade condition and the casting blank specification of actual production, and the structure of device is simple and easy, and is with low costs than combined type screw agitator, and occupation space is little, and is easy and simple to handle.
Claims (3)
1. A side spiral electromagnetic stirring device comprises a box body, a magnetic yoke fixing plate arranged in the box body, a magnetic yoke connected with the magnetic yoke fixing plate, a coil wound outside the magnetic yoke, a box body cover fixed at the top of the box body through a fixing bolt, a power supply device and a cooling device arranged on the side of the box body, and is characterized in that the longitudinal inclination angle of a magnetic yoke body is-80 degrees, the transverse inclination angle of the magnetic yoke body is-40 degrees, a coil winding is arranged on the oblique magnetic yoke, and the end face of the magnetic yoke is parallel to the wall face of the magnetic yoke fixing plate.
2. A side-screw electromagnetic stirring apparatus as set forth in claim 1 wherein a plurality of sets of yokes are attached to said yoke-fixing plate.
3. A side-screw electromagnetic stirring apparatus as defined in claim 1 wherein said yoke has a horizontal width of 100mm to 400 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011183854.XA CN112317707A (en) | 2020-10-29 | 2020-10-29 | Side spiral electromagnetic stirring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011183854.XA CN112317707A (en) | 2020-10-29 | 2020-10-29 | Side spiral electromagnetic stirring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112317707A true CN112317707A (en) | 2021-02-05 |
Family
ID=74296067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011183854.XA Pending CN112317707A (en) | 2020-10-29 | 2020-10-29 | Side spiral electromagnetic stirring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112317707A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112974749A (en) * | 2021-02-09 | 2021-06-18 | 东北大学 | Electromagnetic stirring device and method for improving feeding capacity and center quality of casting blank liquid core |
-
2020
- 2020-10-29 CN CN202011183854.XA patent/CN112317707A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112974749A (en) * | 2021-02-09 | 2021-06-18 | 东北大学 | Electromagnetic stirring device and method for improving feeding capacity and center quality of casting blank liquid core |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2963758A (en) | Production of fine grained metal castings | |
| CN107116191B (en) | Combined type spiral electromagnetic stirrer | |
| CN102189103B (en) | Light alloy electromagnetic ultrasonic casting and rolling integration device and method | |
| CN203639530U (en) | Composite electroslag casting device for optimizing metal solidification structure by using steady-state magnetic field | |
| CN110252975B (en) | Electromagnetic stirring generation device and method of composite time-varying magnetic field and application | |
| CN102554165B (en) | Electromagnetic device for stirring metal melt spirally | |
| CN102825245A (en) | Helical electromagnetic stirring device | |
| CN104759597A (en) | Electromagnetic stirrer for continuous casting solidification end and dynamic control method thereof | |
| CN113426970B (en) | Vertical semi-continuous production device and production process of large round billets with phi of 1000 mm-2000 mm | |
| CN112317707A (en) | Side spiral electromagnetic stirring device | |
| CN205236991U (en) | Prepare device of big high specification quality aluminum alloy ingot casting | |
| CN103464705A (en) | Electromagnetic flow control method for retarding crystallizer liquid level fluctuation | |
| CN202490919U (en) | Device by using electromagnetic induction water-cooling joint-cutting type crystallizer as ingot mould | |
| CN102107266B (en) | Method for driving unconsolidated molten metal in cast ingot to flow | |
| CN102211161B (en) | Method and device for improving quality of continuous casting large-caliber hollow metal tube blank | |
| CN1275724C (en) | Multifunction cold crucible electromagnetic precision shaping and directional solidification device | |
| CN100566886C (en) | The metal continuous casting crystallizer composite apparatus of controlled controlling initial solidification | |
| CN112689543B (en) | Electromagnetic stirring device, stirring method, mould and casting machine for casting aluminium or aluminium alloy in mould | |
| CN202146981U (en) | Device for improving the quality of a continuous-casting large-diameter hollow metal pipe blank | |
| CN107812908B (en) | Electromagnetic centrifugal casting process with axial electromagnetic traction force | |
| KR100419757B1 (en) | A electromagnet stirrer in continuous casting machine | |
| CN112974749A (en) | Electromagnetic stirring device and method for improving feeding capacity and center quality of casting blank liquid core | |
| CN210908017U (en) | Electromagnetic multi-cyclone stirring casting device | |
| CN104439196B (en) | The technique of consumable shear flow method thinning solidification structure and device thereof | |
| CN203610632U (en) | Crescent face radial high-shearing electromagnetic stirring round blank continuous casting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210205 |
|
| RJ01 | Rejection of invention patent application after publication |