JPS58100956A - Electromagnetic stirrer - Google Patents
Electromagnetic stirrerInfo
- Publication number
- JPS58100956A JPS58100956A JP20050681A JP20050681A JPS58100956A JP S58100956 A JPS58100956 A JP S58100956A JP 20050681 A JP20050681 A JP 20050681A JP 20050681 A JP20050681 A JP 20050681A JP S58100956 A JPS58100956 A JP S58100956A
- Authority
- JP
- Japan
- Prior art keywords
- ingot
- magnetic
- magnet
- slab
- electromagnetic
- 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
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
- B22D11/12—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
Description
【発明の詳細な説明】
本発明は連続鋳造機に付設される電磁攪拌装置に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electromagnetic stirring device attached to a continuous casting machine.
未凝固鋳片、即ち内部に未凝固の溶鋼が在る状態の鋳片
に対し、静磁界又は移+IJ磁界を作用させ、これによ
って未凝固部分に誘導された電流又は直接通電された電
流と前記磁界とによってローレンツ力を生ぜしめ、これ
により未凝固g鋼を攪拌し、攪拌流によって凝固進行中
の結晶を破壊し、また溶鋼温度を均一化して等軸晶を発
達させることによってマクロ偏析を解消せんとする電磁
攬袢装:aが連続補遺装置%tに付設される。′第7図
は静磁界を用いた従来装置の一例を略示する立面図、第
8図は従来装置による鋳片の静磁界作用部分の略示断+
ii+図であり、g型下方の鋳片10が未凝固の姻戚に
おいて、矩形断面の鋳片10の長辺側の両面に・N i
tと54とを相互に対向させるようにして2つの永久磁
石(電磁石でもよい>71.72を対1fシ、その上下
に鋳片lOの凝固殻に転接するローラの電極77.78
を配して鋳片引抜方向に通電するようにしている。そう
すると、第8図に白抜矢符にて示す(4)く鋳片幅方向
(長辺に平行な方向)の電磁力が生じて未凝固溶鋼が攪
拌されることになる。A static magnetic field or a moving IJ magnetic field is applied to an unsolidified slab, that is, a slab with unsolidified molten steel inside, and the electric current induced or directly applied to the unsolidified part and the above-mentioned current are applied. A Lorentz force is generated by the magnetic field, which stirs the unsolidified g-steel, destroys crystals in the process of solidification by the stirring flow, and eliminates macro-segregation by equalizing the temperature of the molten steel and developing equiaxed crystals. The electromagnetic force to be added: a is attached to the continuous supplementary device %t. 'Figure 7 is an elevational view schematically showing an example of a conventional device using a static magnetic field, and Figure 8 is a schematic cross-sectional view of the part of a slab affected by a static magnetic field using the conventional device.
ii + figure, when the slab 10 below the g-type is in an unsolidified state, Ni
A pair of two permanent magnets (electromagnets may also be used>71.72) are placed so that t and 54 face each other, and electrodes 77.78 of rollers are placed above and below them to be in rolling contact with the solidified shell of the slab IO.
is arranged so that electricity is applied in the direction of drawing out the slab. Then, an electromagnetic force is generated in the slab width direction (direction parallel to the long side) as indicated by the white arrow (4) in FIG. 8, and the unsolidified molten steel is stirred.
然るところ所かる従来装置dでは、磁束の方向が一方向
に揃わずその分磁界の有効利用が妨げられていた。However, in the conventional device d, the direction of the magnetic flux is not aligned in one direction, which hinders effective use of the magnetic field.
本発明は所かる事情に鑑みてなされたものであって、磁
界を鋳片断面の長辺に平行な方向にすることにより、攪
拌力を高めた効率のよい電磁撹拌の実施を可能とする電
磁攪拌装置を提供することをl」+−VJとし、以丁に
本錯明をその実施例を示す図面に基き詳述する。The present invention has been made in view of certain circumstances, and provides an electromagnetic stirring system that enables efficient electromagnetic stirring with increased stirring force by directing the magnetic field in a direction parallel to the long side of the cross section of the slab. The present invention will now be described in detail with reference to drawings showing embodiments of the invention.
第1図は曲は型のスラブ連続鋳造機を示しており、レー
ドルタレント1上のし一ドル2からタンディツシュ3へ
溶鋼を装入し、ここからスラブ用の鋳型4ヘト鋼を注入
する。慇鋼は電磁攪拌装置5を設けた1直域を経たあと
、湾曲帯6を通過する際に湾曲され、曲げ爛正部7を経
てピンチロール8にて抽出さn1次工程へ移送されてい
く。Fig. 1 shows a continuous slab casting machine, in which molten steel is charged from a droplet 2 on a ladle talent 1 to a tundish 3, and from there, steel is poured into a mold 4 for slabs. After passing through a first stage where an electromagnetic stirrer 5 is installed, the steel is bent as it passes through a bending zone 6, passes through a bending section 7, is extracted by pinch rolls 8, and is transferred to the next stage. .
WJ2図は電磁攪拌装置5の部分を拡大して示している
。コ字状の永久磁石(電磁石でもよい)51.52は鋳
片10の長辺側の側面に鋳片10内を磁束がその長辺に
平行な方向に通過するようにS、Nの磁極端面を臨ませ
て配置してあり、上の永久磁石51と下の永久4H石5
2とでS、N極を逆にしている。両永久磁石51.52
は用層に磁気的影響を及ぼさない程度に十分離隔させて
いる。Figure WJ2 shows an enlarged portion of the electromagnetic stirring device 5. U-shaped permanent magnets (electromagnets may also be used) 51 and 52 are attached to the side surface of the long side of the slab 10 so that the magnetic flux passes through the slab 10 in a direction parallel to the long side. The upper permanent magnet 51 and the lower permanent 4H stone 5
2, the S and N poles are reversed. Both permanent magnets 51.52
are spaced far enough apart to have no magnetic influence on the active layer.
そして永久磁石51の上方及び永久磁石52の下方に鋳
片10の凝固殻に転接するローラの電磁55゜56を配
して鋳片引抜方向に通電するようにしである。所かる通
電回路によって鋳片10に上から下に同かう電l煮が通
電される未凝固の溶鋼には鋳片l折面の短辺方向(19
み方向)の電磁力が働き、その方向は永久41太り石5
1.52のN、Sj竜の配置を逆にしているので上下で
逆回きとなり、その間において第3図に2点鎖線矢符で
示す如く、鋳片1o・の引抜方向に対流を生じて広範な
領域の攪拌が行われることとなる。Electromagnetic rollers 55 and 56 for rolling contact with the solidified shell of the slab 10 are arranged above the permanent magnet 51 and below the permanent magnet 52 so as to be energized in the direction of drawing out the slab. The unsolidified molten steel is energized from top to bottom by a certain energizing circuit.
The electromagnetic force acts in the direction of
Since the arrangement of the N and Sj dragons in 1.52 is reversed, the upper and lower rotations are reversed, and during that time, as shown by the double-dashed arrow in Fig. 3, convection is generated in the direction of drawing out the slab 1o. A wide range of areas will be stirred.
次に第4回文び′第5図に基いて本発明装置と従来装置
とにおける電磁攪拌力に寄与する磁束密度を比較する。Next, the magnetic flux density contributing to the electromagnetic stirring force in the apparatus of the present invention and the conventional apparatus will be compared based on FIG. 5 of the fourth article.
まず、第4図に示す本発明装+1におイテは、磁束は主
に凝固殻を通過するが、鋳片1゜の永久磁石51側の幅
方向(長辺方向)の磁束1ぞ度ΦXは、N極の磁界のI
HさをFとするとΦX−一 ・
・・(1)1(X
RX = l(e+ −(2)
但し、RX:N、S暖間の磁気回路抵抗1、:N、S極
間の磁気回路の長さ
k :凝固殻単位長当りの磁気抵抗
と表され、一方永久磁石51とは反対側の方向へ回る磁
気回路中の磁束密度#Yは
Ry = k (1(+412+2 l!3)
・・・(4)di L、Ry :永久磁石51の
配直測の反対側を迂回するN、51=4間のdi気回)
洛抵抗1、:N、S極と鋳片1pi11方1萌の端縁と
の間の磁気回路の長さ
I!3:鋳片厚み方向の磁気回路の長さと表される。そ
してl、、 12. 13の寸法比を1、二12:
j?3= 1 : 0.5 : nとする場合はRy=
kl、(3+2n)−Rx(3+2n) ・・−(
s)と表される。従って鋳片lOの1同方向(長辺方向
)の磁束密度Φx+yは
と表される。First, in the device according to the present invention shown in FIG. is the magnetic field I of the north pole
If H is F, then ΦX-1 ・
...(1) 1(X RX = l(e+ -(2)
However, RX: N, S warm magnetic circuit resistance 1, : N, magnetic circuit length between S pole k: expressed as magnetic resistance per unit length of solidified shell; The magnetic flux density #Y in the magnetic circuit rotating in the direction is Ry = k (1(+412+2 l!3)
...(4) di L, Ry: N bypassing the opposite side of the direct measurement of the permanent magnet 51, di rotation between 51 = 4)
Raku resistance 1: N, length of the magnetic circuit between the S pole and the edge of the slab 1 pi 11 side 1 moe! 3: Expressed as the length of the magnetic circuit in the thickness direction of the slab. and l,, 12. Dimension ratio of 13: 1, 2: 12:
j? If 3= 1: 0.5: n, then Ry=
kl, (3+2n)-Rx(3+2n)...-(
s). Therefore, the magnetic flux density Φx+y in the same direction (long side direction) of the slab lO is expressed as follows.
次に第5図に示す如き従来装置において、一方の永久磁
石71のN喰の磁界の強さをFとすると、このイ丑石7
1の側における幅方向の磁束i’M l’f (JIX
’は、本発明装置におけると同様
Rx=kl、 ・・・(8)
と表され、一方上記磁石71ON <iから他方の磁石
72のS +iに向かう鋳片10の厚み方向の4rB、
東密度−Y′は
Rr’ = k(21t + 13) ・・・
(助11=] L、RY / ’、対向するM、s+を
間の磁気回路抵抗と表わされる。そして、l、:12:
13の寸法比をll: 12: 13= l : 0.
5 : nとする場合はRy’ = k (A’++n
l、) = kl、(1+n )−Rx(1+n)
・・・(6)と表さた、これより
となる。従って、−片10の合成磁束密度ΦXY(ベク
トル相)は
Φxy −(lJx”+ 1ily”
と表される。Next, in the conventional device as shown in FIG. 5, if the strength of the magnetic field of one permanent magnet 71 is F, then this
Magnetic flux i'M l'f in the width direction on the side of 1 (JIX
' is expressed as Rx=kl, (8) as in the device of the present invention, and on the other hand, 4rB in the thickness direction of the slab 10 from the magnet 71ON <i to S +i of the other magnet 72,
East density - Y' is Rr' = k (21t + 13)...
(Sup. 11=] L, RY/', opposing M, s+ are expressed as the magnetic circuit resistance between them. Then, l, :12:
The size ratio of 13 is ll: 12: 13=l: 0.
5: When n, Ry' = k (A'++n
l,) = kl, (1+n)-Rx(1+n)
...It is expressed as (6), and it becomes from this. Therefore, the composite magnetic flux density ΦXY (vector phase) of the negative piece 10 is expressed as Φxy −(lJx"+1ily").
(6)式及び(1式においてnの1lffi’k n=
0.2.0.3.0.4゜0.5とした場合の本発明装
置イ及び従来装置による合成磁束密度は第1表に示す如
き値となる。Equation (6) and (1lffi'k n of n in Equation 1 =
The composite magnetic flux densities of the device A of the present invention and the conventional device when the angle is 0.2.0.3.0.4°0.5 are as shown in Table 1.
第 1 表
q< l iよりn ’r O,3でけ111X+Y
> *)(Yとなって、従来装置より本@明装置dの方
が磁億−組当たりの有功++a束密度は多くなる。即ち
、具体的に厚味寸法が370 *tx 、幅寸法600
朋である切片において、l、=300稍、l!、−15
0鰭、13=370朋 であって、n=1.23(n会
0.:3)である場合にはとなり、1’X”YはΦxy
より有効磁束密ノ1が8.3%増加し、その分本発1!
1装置4t id従米装置より電磁撹拌力が増加す石こ
ととなる。From Table 1 q< l i, n'r O, 3 is 111X+Y
> *) (Y), the effective + + a flux density per magnetic set is higher in this @ Ming device d than in the conventional device. That is, specifically, the thickness dimension is 370 *tx and the width dimension is 600
In the intercept that is my friend, l, = 300 minutes, l! , -15
0 fin, 13 = 370 fins, and when n = 1.23 (n meeting 0.:3), then 1'X”Y is Φxy
The effective magnetic flux density No. 1 increases by 8.3%, which is the main difference!
This means that the electromagnetic stirring force will be increased compared to the 1 device and the 4t id conventional device.
第6図のグラフVよ、連続鋳造機において、本発明に係
る電4&1攪拌装置が付設されている場合(■)、従来
の電磁攪拌装置が付設されている掲載■)、電磁攪拌装
置が付設されていない場徐■)について、鋳片製品の品
質の(4)何を、横軸に過熱度(Δ′r)を、縦軸に等
軸晶厚(鰭)をとって示している。このグラフから明ら
かな如く本発明装置を付設した連続鋳造機による鋳片の
等軸晶の発達度が最も高く、鋳片品質の同上が確1忍さ
れた。Graph V in Figure 6 shows that when the continuous casting machine is equipped with the electric 4 & 1 stirring device according to the present invention (■), when the conventional electromagnetic stirring device is attached (■), when the electromagnetic stirring device is attached Regarding (4) quality of slab products, the abscissa axis represents superheat degree (Δ'r) and the ordinate axis represents equiaxed crystal thickness (fin). As is clear from this graph, the degree of development of equiaxed crystals in the slab produced by the continuous casting machine equipped with the apparatus of the present invention was the highest, and the same quality of the slab was assured.
以上詳述した(4)く、本発明に係る電磁撹拌装置面は
、矩形断面の鋳片を鋳造する連続鋳造機の未凝因制片通
過域に配される電磁攪拌装置において、鋳片断面の長辺
に平行な磁界を生ぜしめるべく長辺側の一側面に磁極を
昭捷せた磁界発生手段を、鋳片の引抜方向に離隔するd
t数個所に配設してなるものであるから、磁隘−組当り
の攪拌力が高まる一方、広範に攪拌が行われることとな
って、鋳片の品」Uが同上する。更に、設備のレイアウ
ト上、鋳片の両側に永久磁石を対設し得ない場合であっ
ても、鋳片の一測面測にのみ永久磁石を配設することに
より効率のよいam攬袢の実施がOf+七となるなど本
発明は優れた幼果を奏する。As described in detail above (4), the electromagnetic stirrer surface according to the present invention is used in an electromagnetic stirrer disposed in an uncondensed bar passage area of a continuous casting machine that casts slabs with a rectangular cross section. A magnetic field generating means having magnetic poles arranged on one side of the long side in order to generate a magnetic field parallel to the long side is spaced apart in the drawing direction of the slab.
Since the pieces are arranged at several locations, the stirring force per magnetic block is increased, and stirring is carried out over a wide range, resulting in the production of cast slabs. Furthermore, even if it is not possible to install permanent magnets on both sides of the slab due to the layout of the equipment, efficient AM loading can be achieved by installing permanent magnets only on one side of the slab. The present invention produces excellent young fruit, as shown by the fact that the yield is Of+7.
図面は本発明の実施例を示すものであって、第1図は連
続鋳造機の概略構成図、第2図は本発明装置の要部の構
成を略示する斜視図、第3図はその作IJj説LIri
図、弔4.5図は本発明装置d及び従来装置の撹拌力比
較の説明図、第6図は本発明装置dの効果を説明するグ
ラフ、第7図は従来装置の一例を略示する立面図、第8
図はその略示断面図である。
10・・鋳片 51,52・・・永久磁石 55.56
・・・ローラ電極
特 許 出 願 人 住友金属工業株式会社代理人
弁理士 河 野 登 犬
特開口U58−10095G(4)
14開日a58−10095G(6)
算 4 図
8
簿■図
薄 8 KThe drawings show an embodiment of the present invention, and FIG. 1 is a schematic configuration diagram of a continuous casting machine, FIG. 2 is a perspective view schematically showing the configuration of the main parts of the device of the present invention, and FIG. Written by IJj LIri
Figures 4.5 and 4.5 are diagrams for explaining the comparison of the stirring forces of the device d of the present invention and the conventional device, Figure 6 is a graph explaining the effects of the device d of the present invention, and Figure 7 is a schematic illustration of an example of the conventional device. Elevation, No. 8
The figure is a schematic sectional view thereof. 10... Slab 51, 52... Permanent magnet 55.56
...Roller electrode patent applicant: Sumitomo Metal Industries Co., Ltd. agent, patent attorney Noboru Kono Dog special opening U58-10095G (4) 14 Opening day A58-10095G (6) Calculation 4 Fig. 8 Book ■ Diagram thin 8 K
Claims (1)
片通僅域に配される電磁攪拌装置1ゴにおいて、鋳片断
面の長辺に平行な磁界を生せしめるべく長辺側の一画面
に磁極をI高ませた磁界発生手段を1.両片の引抜方向
に離隔する複数個所に配設してなることを特徴とする電
磁攪拌装置。1. In the electromagnetic stirring device 1, which is placed in the area where the unsolidified slab passes through a continuous casting machine that casts slabs with a rectangular cross section, a magnetic stirrer on the long side is used to generate a magnetic field parallel to the long side of the slab cross section. 1. Magnetic field generating means with magnetic poles raised I on one screen. An electromagnetic stirring device characterized in that the electromagnetic stirring device is arranged at a plurality of locations spaced apart in the direction in which both pieces are pulled out.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20050681A JPS58100956A (en) | 1981-12-11 | 1981-12-11 | Electromagnetic stirrer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20050681A JPS58100956A (en) | 1981-12-11 | 1981-12-11 | Electromagnetic stirrer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS58100956A true JPS58100956A (en) | 1983-06-15 |
Family
ID=16425441
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20050681A Pending JPS58100956A (en) | 1981-12-11 | 1981-12-11 | Electromagnetic stirrer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS58100956A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012008574A1 (en) * | 2010-07-16 | 2012-01-19 | Takahashi Kenzo | Molding device for continuous casting equipped with stirring device |
WO2013069314A1 (en) * | 2011-11-10 | 2013-05-16 | Takahashi Kenzo | Mold device for continuous casting having stirring device |
CN103624240A (en) * | 2013-11-22 | 2014-03-12 | 江苏大学 | Method for casting high-boron high-speed steel roll centrifugally under composite action of magnet field and electric field |
-
1981
- 1981-12-11 JP JP20050681A patent/JPS58100956A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012008574A1 (en) * | 2010-07-16 | 2012-01-19 | Takahashi Kenzo | Molding device for continuous casting equipped with stirring device |
JP2012035322A (en) * | 2010-07-16 | 2012-02-23 | Kenzo Takahashi | Mold device for continuously casting with stirring device |
AU2011277379B2 (en) * | 2010-07-16 | 2014-03-27 | Kenzo Takahashi | Molding device for continuous casting equipped with stirring device |
EP2594351A4 (en) * | 2010-07-16 | 2017-09-06 | Kenzo Takahashi | Molding device for continuous casting equipped with stirring device |
WO2013069314A1 (en) * | 2011-11-10 | 2013-05-16 | Takahashi Kenzo | Mold device for continuous casting having stirring device |
JP2013103229A (en) * | 2011-11-10 | 2013-05-30 | Kenzo Takahashi | Mold device for continuous casting having stirring device |
AU2016201435B2 (en) * | 2011-11-10 | 2017-11-23 | Kenzo Takahashi | Molding device for continuous casting equipped with agitator |
CN103624240A (en) * | 2013-11-22 | 2014-03-12 | 江苏大学 | Method for casting high-boron high-speed steel roll centrifugally under composite action of magnet field and electric field |
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