JP2013223887A - Process for producing steel long product by continuous casting and rolling - Google Patents
Process for producing steel long product by continuous casting and rolling Download PDFInfo
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- JP2013223887A JP2013223887A JP2013166381A JP2013166381A JP2013223887A JP 2013223887 A JP2013223887 A JP 2013223887A JP 2013166381 A JP2013166381 A JP 2013166381A JP 2013166381 A JP2013166381 A JP 2013166381A JP 2013223887 A JP2013223887 A JP 2013223887A
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- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
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- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/0406—Moulds with special profile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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Abstract
Description
本発明は、請求項1のプリアンブルによる鋼長尺製品を製造するための方法、およびこの方法のための連続鋳造用永久鋳型に関する。
The present invention relates to a method for producing a long steel product according to the preamble of
連続鋳造により製造された鋳造ストランドを個々のビレットまたはブルームに切断し、それらを室温まで冷却し、次いで、圧延機にて再加熱されたそれらを棒鋼、ワイヤ、および他の鋼長尺製品へと圧延することが知られている。 Cast strands produced by continuous casting are cut into individual billets or blooms, cooled to room temperature, and then reheated in a rolling mill into bar, wire, and other long steel products It is known to roll.
また、その後の圧延の前に再加熱を行うために、圧延炉内に高温(約600℃)の鋳造ビレットを配置することも知られている。 It is also known to place a high-temperature (about 600 ° C.) cast billet in the rolling furnace in order to perform reheating before the subsequent rolling.
エネルギーを節減し、生産量を増加させるために、連続鋳造プラントと圧延列とを、好ましくは、鋳造ストランドと圧延ストランドとを直接連結することを可能にし得る解決策が、長期にわたり模索されてきた。 In order to save energy and increase production, solutions have been sought for a long time that could enable continuous casting plants and rolling trains, preferably casting and rolling strands to be connected directly. .
この場合、鋳造プラントの出口における、スループット、速度、温度、および、温度分布(連続鋳造表面/中心部)と、圧延列の入口におけるそれらとの差が、主要な問題となる。 In this case, the throughput, speed, temperature and temperature distribution (continuous casting surface / center) at the casting plant outlet and the differences between them at the rolling row inlet are the main problems.
圧延機列の入口における最低送り速度は、圧延ストックとの長い接触時間によってローラに対して熱的に過負荷をかけないようにするために、いかなる場合においても4.2m/分を下回らない。さらに、圧延列の入口でのビレットは、その表面上およびその中心部との両方において、圧延に適した温度(1150から1250℃)を有するべきである。とりわけ、表面温度は、可能な限り一様に分布されるべきである。 The minimum feed rate at the entrance of the rolling mill train is in no case less than 4.2 m / min in order not to overload the rollers thermally due to the long contact time with the rolling stock. Furthermore, the billet at the entrance of the rolling train should have a temperature suitable for rolling (1150 to 1250 ° C.) both on its surface and at its center. In particular, the surface temperature should be distributed as uniformly as possible.
EP0761327B1により、連続鋳造機において製造された鋳造ストランドを温度維持/予熱デバイスに送り、その後に、他の温度均一化/高速加熱デバイス内において、この鋳造ストランドを、圧延列に誘導する前に加熱する、1つの方法が知られている。 According to EP 0 761 327 B1, a cast strand produced in a continuous caster is sent to a temperature maintenance / preheating device, which is then heated in another temperature equalization / high speed heating device before being guided to a rolling row One method is known.
この場合における1つの欠点は、再加熱デバイスの設置のためのコストおよび稼動のためのコストが、比較的高いことである。 One drawback in this case is that the costs for installing and operating the reheating device are relatively high.
本発明の基礎を形成する目的は、より簡易なプラント設計および費用対効果のより高い稼動が可能となる方法を提案することである。 The object that forms the basis of the present invention is to propose a method that allows simpler plant design and more cost-effective operation.
本発明によれば、この目的は、請求項1の特徴を有する方法によって達成される。
According to the invention, this object is achieved by a method having the features of
本発明によるこの方法の好ましい他の展開例、および、この方法のための好ましい連続鋳造用永久鋳型が、従属請求項の主題を形成する。 Preferred further developments of this method according to the invention and the preferred continuous casting permanent mold for this method form the subject of the dependent claims.
驚くべきことには、EP0498296B2により知られているように、連続鋳造用永久鋳型を使用する場合には、高速連続鋳造によって製造されたビレットやブルーム用のストランドを、追加的な加熱を伴うことなく圧延列に直接送ることが可能である。連続鋳造用永久鋳型の鋳型空洞は、永久鋳型の注入側の端部における空洞断面の外形線のうちの少なくとも2つの外形線部分が、永久鋳型のストランド出口側の端部における対応する外形線部分に比べて、膨らむ形態となる断面拡張部を形成する。膨らみの湾曲高さは、ストランドの送られる方向に沿って低減し、これにより、鋳造動作中に、鋳型空洞内において形成されるストランド外殻が、永久鋳型を送られる際に変形し、このようにして、均一な冷却および外殻成長と一様な温度分布とがストランド外形部に沿って保証され、これにより、圧延列中に直接的に導入し得る高速の連続鋳造速度が可能となる。また、鋳造プラントの出口における鋳造ストランドの温度比は、圧延列内への導入に適しており、いかなる場合においても、温度調整を実施することが可能であり、しかし加熱を必要としない。 Surprisingly, as known from EP 0498296B2, when using a continuous casting permanent mold, the billet and bloom strands produced by high-speed continuous casting can be used without additional heating. It is possible to send directly to the rolling row. The mold cavity of the permanent mold for continuous casting is such that at least two contour line portions of the contour line of the cavity cross section at the end portion on the injection side of the permanent mold correspond to the contour line portion at the end portion on the strand outlet side of the permanent mold. Compared to the above, a cross-sectional expansion portion that forms a bulge is formed. The curving height of the bulge is reduced along the strand feeding direction, so that during the casting operation, the strand shell formed in the mold cavity is deformed as the permanent mold is fed, and thus In this way, uniform cooling and shell growth and uniform temperature distribution are ensured along the strand profile, which allows for high continuous casting speeds that can be introduced directly into the rolling row. Also, the temperature ratio of the cast strands at the outlet of the casting plant is suitable for introduction into the rolling row, and in any case it is possible to adjust the temperature, but no heating is required.
今日においては、約6m/6分の速度にて、120から130mmの構成範囲内の四角形断面を有するストランドを鋳造することが、実際に可能である。EP0498296B2による永久鋳型断面の形によれば、これまで誘導的に、または圧延列の前部のガス・バーナによって、加熱されなければならなかった冷端部を有さない、表面上における均一な温度分布を有するストランドが製造される。同時に、この構成により、円形断面とは対照的な正四方形断面の技術的な鋳造上の利点(メートル当たりの同一重量に対するより良好な表面/体積比)が、大幅に維持される。 Today it is practically possible to cast a strand having a square cross section in the construction range of 120 to 130 mm at a speed of about 6 m / 6 minutes. According to the shape of the permanent mold cross-section according to EP 0498296B2, a uniform temperature on the surface without the cold end which had to be heated up to now, either inductively or by a gas burner at the front of the rolling row Strands having a distribution are produced. At the same time, this configuration greatly maintains the technical casting advantage (better surface / volume ratio for the same weight per meter) of a square cross-section as opposed to a circular cross-section.
本発明による方法のための連続鋳造用永久鋳型の1つの特に好ましい実施形態では、ほぼ円形の鋳型空洞断面の外形線が、注入側において、実質的に同一寸法の少なくとも3つの外形線部分に区分され、これらの外形線部分のそれぞれが、注入側において、鋳型空洞の、膨らみとしての断面拡張部を有する。膨らみの湾曲高さは、鋳型空洞の部分的長さに少なくともわたって、ストランドの送られる方向に沿って外形線部分の全てで低減する。 In one particularly preferred embodiment of a continuous casting permanent mold for the method according to the invention, the outline of the substantially circular mold cavity cross section is divided into at least three outline parts of substantially the same dimensions on the injection side. Each of these outline portions has a cross-sectional extension as a bulge of the mold cavity on the injection side. The curved height of the bulge is reduced in all of the contoured portions along the direction of strand travel, at least over the partial length of the mold cavity.
本発明による方法のための連続鋳造用永久鋳型の他の有利な実施形態に関しては、多角形の、好ましくは四角形の鋳型空洞断面の外形線が、注入側において、コーナー部間の全てで、鋳型空洞の、膨らみの形態をとる断面拡張部を有する外形線部分を有し、膨らみの湾曲高さが、鋳型空洞の少なくとも部分的長さにわたって、ストランドの送られる方向に沿って外形線部分の全てで低減する。 With regard to another advantageous embodiment of the continuous casting permanent mold for the method according to the invention, the outline of the polygonal, preferably square, mold cavity cross-section, on the injection side, between the corners, the mold A cavity having a profile portion having a cross-sectional extension in the form of a bulge, wherein the bulge's curved height is at least part of the length of the mold cavity, and all of the profile portion along the direction of strand travel. Reduce with.
鋼長尺製品を製造するための本発明による方法であって、連続鋳造用永久鋳型において製造されたビレット用およびブルーム用のストランドを、追加的な加熱を実質的に伴うことなく、圧延列に直接送り、そこで圧延して長尺製品を製造することが可能である方法によって、簡易なプラント設計および費用対効果の高い稼動が可能となる。 A method according to the invention for producing a long steel product, wherein the billet and bloom strands produced in a continuous casting permanent mold are rolled into a rolling row without substantial additional heating. A process that can be fed directly and rolled to produce a long product enables simple plant design and cost-effective operation.
以下、図面を用いてさらに詳細に本発明を説明する。この図面は、単に概略的に図示するものである。 Hereinafter, the present invention will be described in more detail with reference to the drawings. This drawing is merely schematic.
図1は、鋳造取鍋1、中間容器2(タンディッシュ)、水により冷却される永久鋳型3、および、ストランド5をローラ6’により引き出し水平状態へと曲げるためのストランド反らせデバイス6を有する、それ自体既知のものである連続鋳造プラント10の構造を、概略的に示す。本発明によれば、この後に、ストランド5は、圧延ローラ22を有する複数の圧延機ユニット21を有する圧延機列20に直接送られる。このタイプの圧延機列20および圧延機は知られているため、さらに詳細には説明しない。
FIG. 1 has a
この永久鋳型3の鋳型空洞3’は、永久鋳型の注入側の端部における空洞断面の外形線のうちの少なくとも2つの外形線部分が、永久鋳型のストランド出口側の端部における対応する外形線部分に比べて、鋳型空洞3’における膨らむ形態の断面拡張部を形成する。断面拡張部の詳細は示されない。
The
ストランド5の連続鋳造速度は、圧延機列の入口にてストランドとローラとの間の許容接触時間を超過しないように、したがって、ローラの耐用年数を不適切に短縮させないように、少なくとも4.2m/分であることが有利である。
The continuous casting speed of the
圧延機列内への導入のための連続鋳造プラント10の出口における温度比は、ストランドの圧延を最適に行うことが可能となるように、正確に調節される。しかし、どのような場合においても、いかなる外部エネルギーを供給することを伴うことなく、受動的な温度均一化を行うことが可能となる。
The temperature ratio at the outlet of the
連続鋳造用永久鋳型の鋳型空洞断面は、4つ丸角を持つ構成として実質的に形成される。この4つの丸角の構成は、正四方形または矩形を基礎とし、そのコーナー部(角部)領域に比較的大きな円弧状半径範囲(radii)を備える。ストランドの出口側においては、これらの円弧状半径範囲は、鋳型空洞断面の長さまたは幅が120から180mmである場合には、コーナー部領域において約20から40mmであると有利である。 The mold cavity cross section of the continuous casting permanent mold is substantially formed as a configuration having four round corners. The configuration of the four round corners is based on a square or rectangle, and has a relatively large arc-shaped radius range (radii) in the corner (corner) region. On the exit side of the strands, these arcuate radius ranges are advantageously about 20 to 40 mm in the corner region when the mold cavity cross section length or width is 120 to 180 mm.
例えば、4つの丸角を持つ120mmの構成に関しては、約25mmの端部丸み(edge rounding)および5.2m/分の連続鋳造速度を、ならびに、180mm4つ円構成に対しては、約40mmの端部丸みおよび少なくとも4.2m/分の鋳造速度を、実現することが可能となる。 For example, for a 120 mm configuration with 4 round corners, an edge rounding of about 25 mm and a continuous casting speed of 5.2 m / min, and for a 180 mm 4 circle configuration, about 40 mm End rounding and a casting speed of at least 4.2 m / min can be achieved.
永久鋳型3の上方に配置される中間容器2の排出部11には、永久鋳型内に流されることとなる溶鋼の正確な流入量調整のために、好ましくはスライド閉鎖部15である従来式の調整デバイスが存在する。永久鋳型3内の溶融質量の充填レベル高さの調整は、第1の圧延ストランドの入口速度に応じて行われ(いわゆるマスター/スレーブ・オペレーション)、このために、調整デバイス13および充填レベル測定デバイス14が、永久鋳型3の上に設けられる。この調整により、ほぼ一定の充填高さが、永久鋳型内において実現されるべきである。さらに、有利には、永久鋳型内において可能な限り最も平滑度の高い鋼浴表面を得るために、流入量調整デバイスに装着され、永久鋳型内に突出する、耐火性浸漬パイプが設けられる。
The discharge portion 11 of the
鋳造ビレット・ストランドは、4つの丸角を持つ構成を実質的に形成し、この構成に対応するこのストランドの丸みは、十分に高速の鋳造速度により、能動的な後の加熱を伴わずに直接的な圧延が可能である、すなわち鋳造ストランドがばらばらに分割されることなく圧延機列に無限に送られる、圧延に必要な温度分布を有するストランドが製造されるように、選択される。 The cast billet strand substantially forms a configuration with four rounded corners, and the roundness of this strand corresponding to this configuration is directly due to the sufficiently high casting speed without active subsequent heating. Rolling is selected, that is, strands with the temperature distribution required for rolling are produced, in which the cast strands are sent infinitely to the mill row without being divided into pieces.
1 取鍋; 2 中間容器(タンディッシュ); 3 永久鋳型; 3’ 鋳型空洞;
5 ストランド; 6 ストランド反らせデバイス; 6’ ローラ;
20 圧延機列; 21 圧延機ユニット; 22 圧延ローラ。
1 ladle; 2 intermediate container (tundish); 3 permanent mold; 3 'mold cavity;
5 strand; 6 strand warping device; 6 'roller;
20 rolling mill rows; 21 rolling mill units; 22 rolling rollers.
Claims (11)
前記鋳造ビレットおよびブルームのストランドは、その後の加熱を実質的に伴うことなく、圧延機列に直接送られる方法であって、
前記永久鋳型の溶鋼の充填レベル高さを前記圧延機列への前記ストランドの導入速度に応じて調整するための充填レベル測定デバイスを備え、さらに
前記永久鋳型の上方に配置される中間容器の排出部には、好ましくはスライド閉鎖部である調節デバイスが、前記永久鋳型内に流されることとなる溶鋼の正確な調整のために設けられ、前記永久鋳型内の溶融質量の充填レベルの調整が、前記圧延機列の第1のローラ・スタンド内への進入速度に応じて実施される
ことを特徴とする、鋼長尺製品を製造する方法。 Continuous casting of steel to form billet and bloom strands, and continuous rolling of these billet and bloom strands to form long products such as steel bars or steel wires A method for producing a product, wherein the molten steel is poured into a continuous casting permanent mold,
The cast billet and bloom strands are sent directly to a rolling mill row with substantially no subsequent heating,
A filling level measuring device for adjusting the filling level height of the molten steel of the permanent mold according to the speed of introduction of the strand into the rolling mill row, and further discharging the intermediate container disposed above the permanent mold The part is provided with an adjustment device, preferably a slide closure, for precise adjustment of the molten steel to be flowed into the permanent mold, and adjustment of the filling level of the molten mass in the permanent mold, A method for producing a long steel product, characterized in that it is carried out according to the speed of entry of the rolling mill row into the first roller stand.
ことを特徴とする、請求項1から4のいずれかに記載の方法。 The continuous casting permanent mold forms a mold cavity that opens at both ends, and the mold cavity of the continuous casting permanent mold has at least two contours of the contour line of the cavity cross section at the end on the injection side of the permanent mold. The line portion forms a cross-sectional expansion portion that swells compared to the corresponding contour line portion at the end of the permanent mold on the strand exit side, and the curved height of the bulge is reduced along the strand feeding direction. Thus, during the casting operation, the strand outer shell formed in the mold cavity is deformed as the permanent mold is fed, and uniform cooling and shell growth and uniform temperature distribution result in the strand profile. Achieved along with the
A method according to any of claims 1 to 4, characterized in that
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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EP07014841.6A EP2025432B2 (en) | 2007-07-27 | 2007-07-27 | Method for creating steel long products through strand casting and rolling |
EP07014841.6 | 2007-07-27 |
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JP2010517302A Division JP2011504141A (en) | 2007-07-27 | 2008-07-17 | Method for producing long steel products by continuous casting and rolling |
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JP2013223887A true JP2013223887A (en) | 2013-10-31 |
JP5632942B2 JP5632942B2 (en) | 2014-11-26 |
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JP2013166381A Expired - Fee Related JP5632942B2 (en) | 2007-07-27 | 2013-08-09 | Method for producing long steel products by continuous casting and rolling |
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US (1) | US20100276111A1 (en) |
EP (1) | EP2025432B2 (en) |
JP (2) | JP2011504141A (en) |
KR (1) | KR20100038195A (en) |
CN (1) | CN102105244B (en) |
BR (1) | BRPI0814203A8 (en) |
CA (1) | CA2694755C (en) |
RU (1) | RU2484921C2 (en) |
WO (1) | WO2009015782A2 (en) |
ZA (1) | ZA201000216B (en) |
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CN103480647B (en) * | 2013-09-18 | 2016-03-23 | 陕西钢铁集团有限公司 | A kind of device and production method thereof of producing reinforcing bar without heating low temperature Direct Rolling small billet |
CN104923752B (en) * | 2015-07-08 | 2017-04-26 | 南京工业大学 | Continuous casting technology and equipment for titanium or titanium alloy |
AT519277A1 (en) * | 2016-11-03 | 2018-05-15 | Primetals Technologies Austria GmbH | Casting and rolling plant |
CN114932146A (en) * | 2022-06-30 | 2022-08-23 | 浙江青山钢铁有限公司 | Rolling method of super duplex stainless steel wire |
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- 2008-07-17 JP JP2010517302A patent/JP2011504141A/en active Pending
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Also Published As
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RU2010107172A (en) | 2011-09-10 |
CN102105244A (en) | 2011-06-22 |
EP2025432A1 (en) | 2009-02-18 |
CA2694755C (en) | 2015-02-24 |
CN102105244B (en) | 2015-09-09 |
EP2025432B2 (en) | 2017-08-30 |
ZA201000216B (en) | 2011-04-28 |
US20100276111A1 (en) | 2010-11-04 |
BRPI0814203A2 (en) | 2015-01-27 |
WO2009015782A3 (en) | 2009-05-28 |
RU2484921C2 (en) | 2013-06-20 |
EP2025432B1 (en) | 2014-03-19 |
JP2011504141A (en) | 2011-02-03 |
WO2009015782A2 (en) | 2009-02-05 |
BRPI0814203A8 (en) | 2018-12-18 |
CA2694755A1 (en) | 2009-02-05 |
KR20100038195A (en) | 2010-04-13 |
JP5632942B2 (en) | 2014-11-26 |
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