JP2515445B2 - How to prevent slag from sticking - Google Patents
How to prevent slag from stickingInfo
- Publication number
- JP2515445B2 JP2515445B2 JP3132975A JP13297591A JP2515445B2 JP 2515445 B2 JP2515445 B2 JP 2515445B2 JP 3132975 A JP3132975 A JP 3132975A JP 13297591 A JP13297591 A JP 13297591A JP 2515445 B2 JP2515445 B2 JP 2515445B2
- Authority
- JP
- Japan
- Prior art keywords
- slag
- slab
- pressure water
- scarf
- check
- 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.)
- Expired - Lifetime
Links
- 239000002893 slag Substances 0.000 title claims description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000000034 method Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000007254 oxidation reaction Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 208000032544 Cicatrix Diseases 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000037387 scars Effects 0.000 description 1
Landscapes
- Gas Burners (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、鋳片のチェックスカ
ーフ作業において鋳片表面に付着するスラグの付着防止
方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of preventing slag from adhering to the surface of a slab during check scarf work on the slab.
【０００２】[0002]
【従来の技術】連続鋳造工程で鋳造されてライン上を搬
送される鋳片に対し、ガス切断機で一定長さに切断した
のち、チェックスカーフ作業をし材質のチェックを行っ
ている。このチェック作業は、鋳片表面下に発生した介
在物や、割れ、ピンホール等を検出するためのものであ
る。2. Description of the Related Art A slab cast in a continuous casting process and conveyed on a line is cut into a certain length by a gas cutting machine, and then a check scarf work is performed to check the material. This check operation is to detect inclusions, cracks, pinholes, etc., which have occurred under the surface of the cast slab.
【０００３】従来のチェックスカーフ作業では、一旦ラ
インから鋳片を取り出し人手により実施されてきたが最
近では、ライン上で機械的に行うようになってきた。即
ち、図３に示すように鋳片１′上に配されたチェックス
カーフ機の火口２′により、鋳片の一条をスカーフして
行っている。この場合、鋳片表面の酸化反応個所４′か
ら発生したスラグは、従来の部分スカーフ作業のように
高圧水の噴出ノズル３′からの圧力水により除去されて
いる。In the conventional check scarf work, a slab is once taken out from the line and manually carried out, but recently, it has been performed mechanically on the line. That is, as shown in FIG. 3, a slab of scars is scarfed by a crater 2'of a check scarf machine arranged on the cast slab 1 '. In this case, the slag generated from the oxidation reaction point 4'on the surface of the slab is removed by the pressure water from the high pressure water jet nozzle 3'as in the conventional partial scarf work.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、上述し
た従来のチェックスカーフ作業では、鋳片の一部を幅狭
に鋳片の流れに沿って行うため、その側方に残る鋳片面
積が大きく、噴出ノズルにより押し出されたスラグが、
５′のように鋳片上に残留し易く、これが以後の工程で
ある加熱、圧延時で押疵になり、鋼板不良となることが
多かった。本発明はこのような従来技術の問題点を解消
し、チェックスカーフ作業で生じたスラグが鋳片上に残
存しない方法を提供することを目的とする。However, in the above-mentioned conventional check scarf work, since a part of the slab is narrowed along the flow of the slab, the slab area left on the side is large, The slag extruded by the ejection nozzle,
5'is likely to remain on the slab and this often causes flaws during heating and rolling in the subsequent steps, resulting in a defective steel plate. SUMMARY OF THE INVENTION It is an object of the present invention to solve the problems of the prior art and to provide a method in which slag generated by a check scarf work does not remain on a slab.
【０００５】[0005]
【課題を解決するための手段】この目的を達成するため
の本発明のスラグ付着防止方法は、チェックスカーフ火
口を挟んで両側に第１、第２の圧力水噴出ノズルを配
し、その噴出ノズルの傾斜角を上記スカーフ作業方向に
向ってそれぞれθ1 ＝４５°±２０°、θ2 ＝４５°±
２０°として相対峙せしめ、噴出する圧力水を鋳片表面
のスラグ発生部で衝突させ、かつこれら第１および第２
の噴出ノズルの圧力水の圧力差を１：０．３±０．２と
したことを特徴とする。The slag adhesion preventing method of the present invention for achieving this object is to dispose first and second pressure water jet nozzles on both sides of a check scarf crater, and the jet nozzles. Angle of inclination of θ 1 = 45 ° ± 20 °, θ 2 = 45 ° ±
The slag generation part on the surface of the slab is made to collide with the jetted pressure water, and the first and second
The pressure difference of the pressure water of the jet nozzle of is set to 1: 0.3 ± 0.2.
【０００６】[0006]
【作用】本発明は、このようにチェックスカーフ火口の
両側より、圧力の異なる二つの、第１、第２の噴出ノズ
ルより圧力水をスラグ発生の個所に向けて噴出し、第１
の高圧の圧力水により図２で示すＸ部のスラグ除去を行
いながら火口前面のスラグを前方に押し出し、対向する
第２の噴出ノズルから噴出する低圧の圧力水をこれに衝
突せしめて、Ｙ部に流れ出るスラグを前方へ押し出し、
全体の流れとして高圧の圧力水の流れに従いながらスラ
グを完全に前面へ押し流すものである。したがってチェ
ックスカーフ作業を行っても鋳片表面にスラグが残留し
ていることはない。According to the present invention, the pressure water is jetted from the two sides of the check scarf crater toward the spot where the slag is generated from the two first and second jet nozzles having different pressures.
The slag in front of the crater is pushed forward while removing the slag in the X part shown in FIG. 2 by the high pressure water of Y, and the low pressure water ejected from the opposing second ejection nozzle is made to collide with this, and the Y part Push the slag flowing out to the front,
The slag is completely pushed to the front while following the flow of high pressure water as the whole flow. Therefore, even if the check scarf work is performed, slag does not remain on the surface of the slab.
【０００７】[0007]
【実施例】本発明の一実施例について、図１〜図２によ
り説明する。１は鋳造されてライン上を搬送され、一定
長さに切断されたチェックスカーフ作業中の鋳片、２は
チェックスカーフ火口でチェックスカーフ機の昇降自在
なスライダ６上に固定されたマニホールド７に保持され
ており、公知のものと同一である。３ａ，３ｂは上記ス
ライダ６の両側に取り外し自在に配された第１、第２の
圧力水噴出ノズル、４は鋳片表面の酸化反応領域、５は
スカーフにより生じたスラグ、８は酸素供給パイプ、９
は可燃性ガス供給パイプであり、両パイプともチェック
スカーフ火口２に配置される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 is cast and conveyed on the line, and is a slab that is cut into a certain length during the check scarf work, and 2 is held by a check scarf crater on a manifold 7 fixed on a liftable slider 6 of the check scarf machine And is the same as the known one. 3a and 3b are first and second pressure water jet nozzles that are detachably arranged on both sides of the slider 6, 4 is an oxidation reaction region on the surface of the slab, 5 is slag generated by a scarf, and 8 is an oxygen supply pipe. , 9
Is a flammable gas supply pipe, and both pipes are arranged in the check scarf crater 2.
【０００８】チェックスカーフ作業ではチェックスカー
フ火口２から、酸素と可燃性ガスの加熱炎により鋳片表
面を加熱し、溶削酸素を噴出して酸化反応を起こさせ、
チェックスカーフ作業を始めると、溶削反応領域にスラ
グが発生し、スラグは前方へ押し出され、一部は側方へ
も飛散する。このとき、従来ではスラグを鋳片表面に残
留しないよう一側方より圧力水を噴出させているが、こ
れだけでは溶融スラグが水滓化されずに鋳片の表面に捕
捉される。そのため図３のようにスラグ５が残りチェッ
クスカーフ作業した鋳片は、その後のスラグ除去の手入
作業を必要とする。In the check scarf work, the surface of the slab is heated from the check scarf crater 2 by the heating flame of oxygen and combustible gas, and the smelting oxygen is jetted to cause an oxidation reaction,
When the check scarf work is started, slag is generated in the fusing reaction area, the slag is pushed forward, and part is also scattered sideways. At this time, conventionally, pressurized water is jetted from one side so that the slag does not remain on the surface of the slab, but with this alone, the molten slag is captured on the surface of the slab without being turned into water slag. Therefore, as shown in FIG. 3, the slab that has the slag 5 left and has been subjected to the check scarf work requires subsequent maintenance work for removing the slag.
【０００９】本発明者等はこれを完全除去できるよう実
験を重ね、次のようにすることにより、これを解決し
た。即ち、図２に示すようにチェックスカーフ火口２の
両側に、それぞれ相対向する第１、第２の噴出ノズル３
ａ，３ｂを取り替え自由にセットし、スカーフ方向に向
って第１の噴出ノズル３ａの傾斜角θ1 ＝４５°±２０
°、第２の噴出ノズル３ｂの傾斜角θ2 ＝４５°±２０
°に配して相対峙せしめ、噴出する圧力水を鋳片表面の
スラグ発生部で衝突させ、かつこれら第１および第２の
噴出ノズルの圧力水の圧力差を１：０．３±０．２とし
たことである。The present inventors have solved this by conducting experiments so as to completely remove it and performing the following. That is, as shown in FIG. 2, first and second jet nozzles 3 facing each other on both sides of the check scarf crater 2.
a and 3b can be freely exchanged and set, and the inclination angle of the first jet nozzle 3a in the scarf direction is θ 1 = 45 ° ± 20
Angle of inclination of the second jet nozzle 3b θ 2 = 45 ° ± 20
The slag generation part on the surface of the slab is made to collide with the pressure water jetted, and the first and second
That is, the pressure difference of the pressure water of the ejection nozzle is set to 1: 0.3 ± 0.2.
【００１０】この場合、例えば第１の噴出ノズル３ａか
ら噴出する圧力水の圧力を１０kgf/cm2 に設定すれば、
対抗する第２の噴出ノズル３ｂからの圧力水の圧力は約
３．３kgf/cm2 となる。このようにすれば発生したスラ
グに対し、第１の噴出ノズル３ａから噴出する圧力水に
より、側方のＸ部に飛散したスラグを残すことなく、ス
ラグを噴出ノズルの指向する方向へ押し出し、また圧力
の低い第２の噴出ノズル３ｂから噴出する圧力水によ
り、Ｙ部に飛散したスラグを押し出しながら第１の圧力
水の流れに衝突しながら流れ、全体の流れとして圧力の
高い圧力水の流れに合流させる。その結果チェックスカ
ーフ作業の行われた両側面にスラグを残すことなく、ス
カーフ作業の進行する方向ないしは高い圧力水の噴出す
る方向へ押し出され、スラグは飛散する。In this case, for example, if the pressure of the pressure water jetted from the first jet nozzle 3a is set to 10 kgf / cm 2 ,
The pressure of the pressure water from the opposing second ejection nozzle 3b is about 3.3 kgf / cm 2 . In this way, with respect to the generated slag, the pressure water jetted from the first jet nozzle 3a pushes the slag in the direction in which the jet nozzle is directed, without leaving the slag scattered at the side X portion, and By the pressure water jetted from the second jet nozzle 3b having a low pressure, the slag scattered to the Y portion is pushed out while colliding with the flow of the first pressure water, and the whole flow becomes a flow of high pressure water. Join. As a result, the slag is scattered by being pushed in the direction in which the scarf work progresses or the direction in which high-pressure water is ejected without leaving slag on both sides of the check scarf work.
【００１１】なお、第１、第２の噴出ノズル３ａ，３ｂ
の設定角度は、おのおの４５°を基本とするが、鋳片と
火口との相対速度、鋳片温度、鋳片の材質等により±２
０°の範囲で変化させる。また、それぞれの角度を火口
を挟んで必ずしも対称にすることなく、この範囲で選定
すればよい。噴出ノズルの角度の変化に当たっては、噴
出ノズルの差し換えを行えばよく、又は噴出部の角度調
整可能なようにフレキシブルなものを使用すればよい。The first and second ejection nozzles 3a and 3b
The setting angle for each is basically 45 °, but ± 2 depending on the relative speed between the slab and the crater, slab temperature, slab material, etc.
Change in the range of 0 °. Further, the respective angles may be selected within this range without necessarily being symmetrical with respect to the crater. When changing the angle of the ejection nozzle, the ejection nozzle may be replaced, or a flexible one capable of adjusting the angle of the ejection portion may be used.
【００１２】[0012]
【発明の効果】本発明は以上のようなものであるので、
鋳片表面から後工程に支障のあるスラグを完全に除去す
ることができて、スラグの付着による製品欠陥をきたす
ようなことがない。またこのスラグの付着防止方法は、
単にチェックスカーフ方法に適用されるだけでなく、鋳
片の部分スカーフ作業にも適用できる。このように本方
法は、鋳片の生産分野で果たす役割は大きく、工業的利
益は極めて大きい。Since the present invention is as described above,
It is possible to completely remove the slag that interferes with the post-process from the surface of the slab, without causing a product defect due to the adhesion of the slag. Also, this slag adhesion prevention method is
Not only can it be applied to the check scarf method, but it can also be applied to the partial scarf operation of cast slabs. As described above, the present method plays a large role in the production field of cast slabs, and has an extremely great industrial advantage.
【図１】本発明の一例を示す斜視図。FIG. 1 is a perspective view showing an example of the present invention.
【図２】本発明を説明するための平面図である。FIG. 2 is a plan view for explaining the present invention.
【図３】従来の方法を示す平面図である。FIG. 3 is a plan view showing a conventional method.
１ 鋳片 ２ チェックスカーフ火口 ３ａ，３ｂ 圧力水噴出ノズル ４ 酸化反応領域 ５ スラグ ６ スライダ ７ マニホールド ８ 酸素供給パイプ ９ 可燃性ガス供給パイプ 1 Cast Piece 2 Check Scarf Crater 3a, 3b Pressure Water Jet Nozzle 4 Oxidation Reaction Area 5 Slag 6 Slider 7 Manifold 8 Oxygen Supply Pipe 9 Combustible Gas Supply Pipe
───────────────────────────────────────────────────── フロントページの続き (72)発明者 佐藤 達弥 愛知県東海市東海町５−３ 新日本製鐵 株式会社 名古屋製鐵所内 (72)発明者 森 賢治 愛知県東海市東海町５−３ 新日本製鐵 株式会社 名古屋製鐵所内 (56)参考文献 特開 昭62−101378（ＪＰ，Ａ) 特開 昭56−56777（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tatsuya Sato 5-3 Tokai-cho, Tokai-shi, Aichi Nippon Steel Corporation Nagoya Works (72) Inventor Kenji Mori 5-3 Tokai-cho, Tokai-shi, Aichi Nippon Steel Co., Ltd., Nagoya Steel Works (56) References JP-A-62-101378 (JP, A) JP-A-56-56777 (JP, A)
Claims (1)
去を行うにあたり、チェックスカーフ火口を挟んで両側
に第１、第２の圧力水噴出ノズルを配し、その噴出ノズ
ルの傾斜角を上記スカーフ作業方向に向ってそれぞれθ
1 ＝４５°±２０°、θ2 ＝４５°±２０°として相対
峙せしめ、噴出する圧力水を鋳片表面のスラグ発生部で
衝突させ、かつこれら第１および第２の噴出ノズルの圧
力水の圧力差を１：０．３±０．２としたことを特徴と
するスラグの付着防止方法。1. When removing slag in check scarf work, first and second pressure water jet nozzles are arranged on both sides of the check scarf crater, and the inclination angle of the jet nozzle is directed toward the scarf work direction. Each θ
1 = 45 ° ± 20 °, θ 2 = 45 ° ± 20 °, and the jetted pressure water is made to collide with the slag generating part on the surface of the slab, and the pressure water of the first and second jet nozzles is made to collide. The method for preventing slag adhesion is characterized in that the pressure difference is 1: 0.3 ± 0.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3132975A JP2515445B2 (en) | 1991-06-04 | 1991-06-04 | How to prevent slag from sticking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3132975A JP2515445B2 (en) | 1991-06-04 | 1991-06-04 | How to prevent slag from sticking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0557431A JPH0557431A (en) | 1993-03-09 |
| JP2515445B2 true JP2515445B2 (en) | 1996-07-10 |
Family
ID=15093869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3132975A Expired - Lifetime JP2515445B2 (en) | 1991-06-04 | 1991-06-04 | How to prevent slag from sticking |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2515445B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4958667B2 (en) * | 2007-07-17 | 2012-06-20 | 住友金属工業株式会社 | Scarfing device and slag removal method |
-
1991
- 1991-06-04 JP JP3132975A patent/JP2515445B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0557431A (en) | 1993-03-09 |
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