JP6229632B2 - Rolling order determination system and rolling order determination method for hot rolling - Google Patents
Rolling order determination system and rolling order determination method for hot rolling Download PDFInfo
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Description
本発明は、製鋼プロセスと熱間圧延プロセスとの同期操業に際し、高温鋳片を一旦仮置きして保熱するための仮置き保熱ピット（以下、略して保熱ピットとも云う）を利用することで、圧延制約のために高温装入用の加熱炉に直接装入できない鋳片の保熱による放熱ロスの抑止と、保熱ピットに仮置きされ保熱された鋳片をも高温装入用の加熱炉へ装入する鋳片として選択可能にすることによる差し合い本数の向上を実現した、燃料原単位改善を達成する熱間圧延の圧延順序決定システムおよび圧延順序決定方法に関するものである。 The present invention uses a temporary heat retaining pit (hereinafter also referred to as a heat retaining pit for short) for temporarily placing a high-temperature slab and temporarily retaining heat during the synchronous operation of the steel making process and the hot rolling process. Therefore, heat dissipation loss due to heat retention of slabs that cannot be charged directly into a heating furnace for high temperature charging due to rolling restrictions, and slabs that are temporarily placed in a heat retaining pit and kept warm are also charged at high temperatures. TECHNICAL FIELD The present invention relates to a hot rolling rolling order determination system and a rolling order determination method that achieves an improvement in the fuel consumption rate by realizing an increase in the number of mating pieces by making it selectable as a slab to be charged into a heating furnace. .
製鋼プロセスで鋳造された鋳片（スラブ）の多くは一旦鋳片を放冷したまま保管するヤード（以下、略して鋳片放冷ヤードまたはヤードと云う）に保管され、この間放冷され、その後、圧延加工できる温度まで加熱炉で再加熱してから圧延されるが、一部の鋳片はヤードを経由しない直送材として高温のまま専用の加熱炉に直送され圧延される。このようなヤード材（非直送材）と直送材を混在させた操業は差し合い操業と呼ばれ、製造能率の向上だけでなく、放熱抑止による省エネルギーの観点からも有用である。 Most of the slabs (slabs) cast in the steelmaking process are stored in a yard where the slab is allowed to cool and then stored (hereinafter referred to as the slab cooling yard or yard for short). Rolling is performed after reheating in a heating furnace to a temperature at which rolling can be performed, but some slabs are directly fed to a dedicated heating furnace and rolled as a direct feed material that does not pass through the yard. The operation in which such a yard material (non-directly-transmitted material) and a directly-transmitted material are mixed is called a “mating operation”, and is useful not only from the improvement of manufacturing efficiency but also from the viewpoint of energy saving by suppressing heat dissipation.
ただし、圧延プロセスにおける鋳片の圧延順序には鋳片の鋼種、厚み、温度などに関する多岐に亘る制約があり、それを満足しつつ、高い圧延能率を達成できるように圧延スケジュールを決定する技術が求められている。特許文献１は直送スラブと非直送スラブの圧延順序を決定する方法で、圧延能率の評価関数と板厚・幅変動の評価関数を定義して、その総和を最適化する圧延順序スケジュール方法が記載されている。また、特許文献２は、高温装入用加熱炉に直接装入される高温装入鋳片と、一旦置場（鋳片放冷ヤード）に載置され放冷されて、加熱炉装入順序を調整した後、通常温度装入用加熱炉に装入される鋳片について、これらの差し合い操業時の圧延順序を決定するシステムであり、圧延機等の処理能力を記憶する能率計算マスタと各種の圧延制約条件を記憶する圧延制約マスタを有し、それらの構文解析によって圧延順序を決定する手法が記載されている。
However, the rolling order of the slabs in the rolling process has various restrictions on the steel type, thickness, temperature, etc. of the slabs, and there is a technology that determines the rolling schedule so that high rolling efficiency can be achieved while satisfying them. It has been demanded. Patent Document 1 describes a rolling order scheduling method for determining the rolling order of direct slabs and non-direct slabs, defining an evaluation function of rolling efficiency and an evaluation function of sheet thickness / width variation, and optimizing the sum. Has been.
一方、連続鋳造からの直送材が圧延制約条件を満たさない場合、高温鋳片を保熱したまま仮置きする保熱ピットを用いると、放熱ロスを抑止できるとともに、高温装入用加熱炉への装入順序を調整可能となる。 On the other hand, if the direct feed material from continuous casting does not satisfy the rolling constraint conditions, using a heat retaining pit that temporarily retains the high temperature cast slab, heat dissipation loss can be suppressed, and the heating furnace for high temperature charging can be prevented. The charging order can be adjusted.
しかしながら、従来の特許文献１、２の方法またはシステムでは、高温鋳片専用の仮置き保熱ピットが考慮されていないため、保熱ピット内高温鋳片が圧延順序に含まれることが無い。したがって、圧延制約条件を満たさない直送材は保熱ピット内に溜まり続けてしまい、保熱ピットが満杯になった場合には、鋳片放冷ヤードに返却され放冷されることになり、圧延に使用するには所定温度まで再び加熱する必要が生じて多大な放熱ロスが発生する。
However, the conventional methods or systems of
前記仮置き保熱ピットが満杯になるのを防ぐためには、オペレータ判断で保熱ピット内の高温鋳片を搬出して高温装入用の加熱炉に装入し圧延することが求められるが、従来は、特許文献１、２に記載されるように、保熱ピット内の高温鋳片を対象とせずに圧延能率・圧延制約条件を確認して圧延順序を決定しているため、オペレータ判断で保熱ピット内の鋳片を高温装入用加熱炉に装入すると、圧延能率の低下や圧延制約条件の違反による圧延トラブルを誘発する虞がある。
In order to prevent the temporary heat-retaining pit from becoming full, it is required to carry out and roll the high-temperature cast slab in the heat-retaining pit at the operator's discretion and charged in a high-temperature charging furnace. Conventionally, as described in
そこで、本発明は、仮置き保熱ピットに仮置きされ保熱された高温鋳片をも高温装入用の加熱炉へ装入する鋳片として自動選択を可能にする熱間圧延の圧延順序決定システムおよび圧延順序決定方法を提供することを課題とした。 Therefore, the present invention is a rolling sequence of hot rolling that enables automatic selection of a high-temperature cast slab temporarily placed and kept in a temporary heat-retaining pit as a slab charged into a heating furnace for high-temperature charging. It was an object to provide a determination system and a rolling order determination method.
本発明は前記課題を解決するために、以下の手段をとったものである。すなわち、
［１］ 連続鋳造機による製鋼プロセスと、複数の加熱炉を有し、一つの加熱炉からはシーケンシャルに鋳片を取り出して熱間圧延機で熱間圧延する圧延プロセスとの同期操業に際し、前記連続鋳造機から抽出され高温装入用の加熱炉に直接装入される高温装入鋳片Ａと、前記連続鋳造機から抽出され一旦高温鋳片専用の仮置き保熱ピットに仮置きされ保熱された後に前記高温装入用の加熱炉に装入される高温装入鋳片Ｂと、前記連続鋳造機から抽出され鋳片放冷ヤードに載置され放冷された後に通常温度装入用の加熱炉に装入される通常温度装入鋳片Ｃとを差し合いながら前記熱間圧延機で熱間圧延する差し合い操業時の圧延順序決定システムであって、
前記差し合い操業中に、前記連続鋳造機から抽出され高温装入用の加熱炉に直接装入される高温装入鋳片Ａと、前記連続鋳造機から抽出され一旦高温鋳片専用の仮置き保熱ピットに仮置きされ保熱された後に高温装入用の加熱炉に装入される高温装入鋳片Ｂとのどちらを前記高温装入用の加熱炉に装入すべきか判定する加熱・圧延順序判定手段と、
前記加熱・圧延順序判定後の前記差し合い操業時の圧延スケジュールが所定の制約条件を充足するか否かを判定する圧延制約判定手段と、
前記圧延制約条件を充足する圧延スケジュールに基づいて圧延プロセスを制御する圧延制御手段と、
を備えたことを特徴とする熱間圧延の圧延順序決定システム。
［２］ 前記加熱・圧延順序判定手段は、先に高温装入用の加熱炉に装入済みの高温装入鋳片Ｄの差し合い位置を決定しておき、続いて、未装入の前記高温装入予定鋳片ＡまたはＢの差し合い位置を決定する際に、
前記連続鋳造機から抽出され高温装入用の加熱炉に直接装入される予定の高温装入鋳片Ａと、前記連続鋳造機から抽出され一旦高温鋳片専用の仮置き保熱ピットに仮置きされ保熱されている高温装入鋳片Ｂとの両方を差し合いの候補とし、差し合い本数が多い方を採用して、高温装入用の加熱炉に装入するものとすることを特徴とする［１］に記載の熱間圧延の圧延順序決定システム。
［３］ 連続鋳造機による製鋼プロセスと、複数の加熱炉を有し一つの加熱炉からはシーケンシャルに鋳片を取り出して熱間圧延機で熱間圧延する圧延プロセスとの同期操業に際し、前記連続鋳造機から抽出され高温装入用の加熱炉に直接装入される高温装入鋳片Ａと、前記連続鋳造機から抽出され一旦高温鋳片専用の仮置き保熱ピットに仮置きされ保熱された後に前記高温装入用の加熱炉に装入される高温装入鋳片Ｂと、前記連続鋳造機から抽出され鋳片放冷ヤードに載置され放冷された後に通常温度装入用の加熱炉に装入される通常温度装入鋳片Ｃとを差し合いながら前記熱間圧延機で熱間圧延する差し合い操業時の圧延順序決定方法であって、
前記差し合い操業中に、前記連続鋳造機から抽出され高温装入用の加熱炉に直接装入される高温装入鋳片Ａと、前記連続鋳造機から抽出され一旦高温鋳片専用の仮置き保熱ピットに仮置きされ保熱された後に高温装入用の加熱炉に装入される高温装入鋳片Ｂとのどちらを前記高温装入用の加熱炉に装入すべきか判定する加熱・圧延順序判定工程と、
前記加熱・圧延順序判定後の前記差し合い操業時の圧延スケジュールが所定の圧延制約条件を充足するか否かを判定する圧延制約判定工程と、
前記圧延条件を充足する圧延スケジュールに基づいて圧延プロセスを制御する圧延制御工程と、
を有することを特徴とする熱間圧延の圧延順序決定方法。
［４］ 前記加熱・圧延順序判定工程は、先に高温装入用の加熱炉に装入済みの高温装入鋳片Ｄの差し合い位置を決定しておき、続いて、未装入の前記高温装入予定鋳片ＡまたはＢの差し合い位置を決定する際に、
前記連続鋳造機から抽出され高温装入用の加熱炉に直接装入される予定の高温装入鋳片Ａと、前記連続鋳造機から抽出され一旦高温鋳片専用の仮置き保熱ピットに仮置きされ保熱されている高温装入鋳片Ｂとの両方を差し合いの候補とし、差し合い本数が多い方を採用して、高温装入用の加熱炉に装入するものとすることを特徴とする［３］に記載の熱間圧延の圧延順序決定方法。
In order to solve the above-mentioned problems, the present invention takes the following means. That is,
[1] In a synchronous operation of a steelmaking process by a continuous casting machine and a rolling process having a plurality of heating furnaces, sequentially taking out the slab from one heating furnace and hot rolling with a hot rolling mill, A high temperature charged slab A extracted from a continuous casting machine and directly charged into a heating furnace for high temperature charging, and extracted from the continuous casting machine and temporarily placed in a temporary heat retaining pit dedicated to the high temperature slab. High-temperature charging slab B that is charged in the heating furnace for high-temperature charging after being heated, and normal temperature charging after being extracted from the continuous casting machine and placed in the slab cooling yard and allowed to cool A rolling order determination system during a mating operation of hot rolling with the hot rolling mill while mating with a normal temperature charging slab C charged in a heating furnace for
During the mating operation, the high-temperature charged slab A extracted from the continuous casting machine and directly charged into a high-temperature charging furnace, and the temporary placement once extracted from the continuous casting machine and dedicated to the high-temperature slab. Heating to determine which one should be charged into the high-temperature charging furnace, which is temporarily placed in the heat-retaining pit and heated and then charged into the high-temperature charging slab B charged into the high-temperature charging furnace・ Rolling order judgment means;
Rolling constraint determination means for determining whether or not the rolling schedule during the mating operation after the heating / rolling order determination satisfies a predetermined constraint condition;
Rolling control means for controlling the rolling process based on a rolling schedule that satisfies the rolling constraint conditions;
A rolling order determination system for hot rolling, comprising:
[2] The heating / rolling order determining means determines the position of the high-temperature charged cast slab D that has been previously charged in the high-temperature charging furnace, and then the uncharged When determining the mating position of the slab A or B scheduled to be charged at high temperature,
Temporary charging slab A extracted from the continuous casting machine and to be directly charged into a high temperature charging furnace, and temporarily placed in a temporary heat retaining pit extracted from the continuous casting machine and dedicated to the high temperature slab. It is assumed that both the high-temperature charging cast slab B placed and heat-retained are candidates for mating, and the one with a large number of mating is adopted and charged into a heating furnace for high-temperature charging. The rolling order determination system for hot rolling as described in [1], which is characterized in that
[3] In the case of a synchronous operation of a steel making process by a continuous casting machine and a rolling process having a plurality of heating furnaces and sequentially taking out slabs from one heating furnace and hot rolling with a hot rolling mill, High temperature charged slab A extracted from a casting machine and directly charged into a heating furnace for high temperature charging, and extracted from the continuous casting machine and temporarily placed in a temporary heat retaining pit exclusively for high temperature slab High temperature charging slab B to be inserted into the high temperature charging furnace after being heated, and normal temperature charging after being extracted from the continuous casting machine and placed in the slab cooling yard and allowed to cool A rolling order determination method during a mating operation of hot rolling with the hot rolling mill while mating with a normal temperature charging slab C charged in the heating furnace,
During the mating operation, the high-temperature charged slab A extracted from the continuous casting machine and directly charged into a high-temperature charging furnace, and the temporary placement once extracted from the continuous casting machine and dedicated to the high-temperature slab. Heating to determine which one should be charged into the high-temperature charging furnace, which is temporarily placed in the heat-retaining pit and heated and then charged into the high-temperature charging slab B charged into the high-temperature charging furnace・ Rolling order judgment process,
A rolling constraint determination step for determining whether a rolling schedule during the mating operation after the heating / rolling sequence determination satisfies a predetermined rolling constraint condition; and
A rolling control step for controlling a rolling process based on a rolling schedule that satisfies the rolling conditions;
A method for determining the rolling order of hot rolling, comprising:
[4] In the heating / rolling order determination step, the mating position of the high-temperature charged cast slab D that has been charged in the heating furnace for high-temperature charging is determined in advance, and then the uncharged When determining the mating position of the slab A or B scheduled to be charged at high temperature,
Temporary charging slab A extracted from the continuous casting machine and to be directly charged into a high temperature charging furnace, and temporarily placed in a temporary heat retaining pit extracted from the continuous casting machine and dedicated to the high temperature slab. It is assumed that both the high-temperature charging cast slab B placed and heat-retained are candidates for mating, and the one with a large number of mating is adopted and charged into a heating furnace for high-temperature charging. The method for determining the rolling order of hot rolling as described in [3].
本発明では、一旦高温鋳片専用の仮置き保熱ピットに仮置きされ保熱された後に高温装入用の加熱炉に装入される高温装入鋳片Ｂも圧延順序決定システムの対象とする。したがって、圧延能率の低下や圧延制約条件の違反なく保熱ピット内の高温鋳片を搬出させることができ、保熱ピット満杯時の鋳片放冷ヤードへの返却および放冷による放熱も防止できる。 In the present invention, the high-temperature charged cast slab B that is temporarily placed in a temporary heat-retaining pit dedicated to the high-temperature cast slab and then heat-retained and then charged in a heating furnace for high-temperature charge is also subject to the rolling order determination system To do. Therefore, it is possible to carry out the high-temperature cast slab in the heat retaining pit without lowering the rolling efficiency or violating the rolling constraint conditions, and it is possible to prevent heat dissipation due to return to the slab cooling yard when the heat retaining pit is full and cooling. .
また、保熱ピット内の高温鋳片も圧延順序決定の候補となり、圧延順序決定における差し合い材の量が拡大されることで、差し合い本数の増大による燃料原単位の改善も期待される。 Further, the high-temperature slab in the heat retaining pit is also a candidate for determining the rolling order, and an increase in the number of mating materials in the rolling order determination is expected to improve the fuel consumption rate by increasing the number of mating.
まず、本発明を適用する製造ラインについて、一例を示す概略図である図１を参照して説明する。連続鋳造機１で溶鋼から鋳造して得られる鋳片（スラブ）は、熱間圧延機２で圧延加工される前に、加熱炉５にて加熱される。このとき、置場である鋳片放冷ヤード３に一時保管され、通常温度装入用加熱炉５１または５２に装入される鋳片の搬送ルートと、鋳片放冷ヤード３を経由せずに直接高温装入用加熱炉５３に装入される鋳片の搬送ルートとがある。前者を通る鋳片を非直送材（ヤード材）、後者を通る鋳片を直送材と呼び、非直送材を母体として直送材を差し合う操業が基本となる。また、直送材の搬送ルートの途中には高温鋳片専用の仮置き保熱ピット４があり、連続鋳造機の後にすぐには高温装入用加熱炉５３に装入しない鋳片を保熱したまま仮置きすることができる。これにより、高温装入用加熱炉満杯時にも鋳片を高温のまま仮置きし、連続鋳造機からの到着順とは異なる順で、高温のままの鋳片を高温装入用加熱炉に装入することが可能となる。その結果、鋳片放冷ヤードで鋳片を放冷することを抑制できる。
First, a production line to which the present invention is applied will be described with reference to FIG. 1 which is a schematic diagram showing an example. The slab (slab) obtained by casting from molten steel with the continuous casting machine 1 is heated in the
つぎに、本発明に係る圧延順序決定システムについて、一例を示すブロック図である図２を参照して説明する。圧延順序決定システムは、加熱計算機６に搭載される。加熱計算機６は圧延スケジュールの計算に当たって、圧延能率が低下するか否かを判定するために圧延時間の情報が必要となるため、圧延計算機７と接続され、また、将来の直送材となる未鋳造スラブの到着予定時刻等が必要となるため、鋳造計算機８とも接続される。決定された圧延順序にしたがって、加熱計算機６は加熱炉入側の鋳片搬送設備の搬送（鋳片放冷ヤードからの搬送・装入、仮置き保熱ピットからの搬出など）を設定し、それが設備各々のＰＬＣ（ｐｒｏｇｒａｍｍａｂｌｅ ｌｏｇｉｃ ｃｏｎｔｒｏｌｌｅｒ）９にインターフェースされ、鋳片が自動搬送される。
Next, the rolling order determination system according to the present invention will be described with reference to FIG. 2 which is a block diagram showing an example. The rolling order determination system is mounted on the
また、図３は、本発明に係る圧延順序決定システムによる圧延順序決定方法の一例を示すフローである。
「<<１>>情報編集」では、加熱炉未装入材の加熱炉装入予定温度計算など差し合い操業の判定に必要な情報を計算・編集し、「<<２>>情報入力」で「<<３>>差し合い判定」に渡す。差し合い判定では、差し合い材（高温装入用加熱炉で加熱した鋳片）が加熱完了するか否か確認する「在炉時間判定」、決定した圧延順序が圧延制約条件を満たすか確認する「圧延制約判定」、通常温度装入用加熱炉から抽出される鋳片の圧延間隔（余裕時間）に高温装入用加熱炉から抽出される差し合い材の圧延時間が嵌るか確認する「余裕時間判定」を実行して圧延順序を決定する。本差し合い判定は、（１）高温装入用加熱炉装入済みの加熱中の鋳片、（２）高温装入用加熱炉に未装入の鋳片、の順に実行されるが、後者は搬送モード（直送モード：未装入の鋳片として直送材を選択、仮置きモード：保熱ピット材を選択、自動モード：両方）によって処理が分かれる。自動モードの場合、直送材と仮置き保熱ピット材の両方を候補として差し合い判定を実行し、「結果選択」にて高温装入用加熱炉へ装入する鋳片の本数の多い方を採用させることができ、当自動モード処理により、仮置き保熱ピットを考慮した圧延順序決定が可能となる。そして、「<<４>>結果出力」にて、決定した圧延順序と、その圧延順序を実現するための未鋳造材の搬送先（高温装入用加熱炉への直送材とするか、仮置き保熱ピットに搬入するか）を出力する。
Moreover, FIG. 3 is a flow which shows an example of the rolling order determination method by the rolling order determination system which concerns on this invention.
In “<< 1 >> information editing”, information necessary for judgment of the matching operation such as the estimated furnace charging temperature calculation of the unheated furnace is calculated and edited, and “<< 2 >> information input” To “<< 3 >> match determination”. In the mating judgment, “in-furnace time judgment” for confirming whether or not the mating material (slab heated in the heating furnace for high temperature charging) is completed, and confirms whether the determined rolling order satisfies the rolling constraint condition. “Rolling constraint judgment”, “surplus” to check whether the rolling time of the mating material extracted from the high-temperature charging heating furnace fits in the rolling interval (margin time) of the slab extracted from the normal-temperature charging heating furnace Time determination "is executed to determine the rolling order. This mating determination is performed in the order of (1) a slab that is already charged in a heating furnace for high-temperature charging, and (2) a slab that is not charged in a heating furnace for high-temperature charging. The processing is divided according to the transport mode (direct feed mode: direct feed material is selected as a non-charged slab, temporary placement mode: heat retaining pit material is selected, automatic mode: both). In the automatic mode, the combination judgment is executed with both the direct feed material and the temporary heat-retaining pit material as candidates, and the one with the larger number of slabs to be charged into the high-temperature charging furnace in the “result selection” is selected. This automatic mode process can determine the rolling order in consideration of the temporary heat retaining pits. Then, in the “<< 4 >> result output”, the determined rolling order and the destination of the uncast material for realizing the rolling order (directly fed to the heating furnace for high temperature charging, or temporary Whether it will be carried into the heat insulation pit).
上述した実施形態で実施した本発明例について、図４を参照して説明する。 An example of the present invention implemented in the above-described embodiment will be described with reference to FIG.
図４は、本発明の実施例と従来例とで、圧延順序実績を比較して示す棒グラフである。縦軸は各鋳片を熱間圧延した後の鋼帯の幅であり、横軸は鋳片の圧延順序である。通常温度装入用加熱炉からの鋳片を白抜き四角、高温装入用加熱炉へ直送された鋳片を黒塗り四角、保熱ピット経由で高温装入用加熱炉へ装入された鋳片を斜線入り四角で示す。 FIG. 4 is a bar graph showing a comparison of rolling order results between the example of the present invention and the conventional example. The vertical axis represents the width of the steel strip after each slab is hot-rolled, and the horizontal axis represents the rolling order of the slabs. Cast slab from normal temperature charging furnace, white square, cast slab sent directly to high temperature charging furnace, black square, casting charged into high temperature charging furnace via heat retaining pit Pieces are shown as hatched squares.
上段（ａ）は、オペレータによる圧延順序決定結果の一例である。７３本の差し合いを実施しているが、この間に仮置き保熱ピット材は選択できていない。なお、この間に保熱ピット満杯による鋳片放冷ヤードへの鋳片搬送が計３回発生した。 The upper row (a) is an example of the rolling order determination result by the operator. 73 mats are implemented, but during this time, the temporary heat-retaining pit material cannot be selected. During this time, slab conveyance to the slab cooling yard due to the heat insulation pit full occurred three times in total.
それに対して、下段（ｂ）は本発明の一例であり、圧延順序決定システムで行った結果、差し合い本数７３本と従来例と同等でありながら、仮置き保熱ピット材を１１本選択できている。なお、この間に保熱ピット満杯による鋳片放冷ヤードへの鋳片搬送は発生しなかった。したがって、圧延能率を低下させることが無く、仮置き保熱ピット材の差し合いも含めた圧延順序を自動決定できた。 On the other hand, the lower part (b) is an example of the present invention, and as a result of performing with the rolling order determination system, the number of temporary holding heat-retaining pit materials can be selected while 73 are the same as the conventional example. ing. During this time, no slab conveyance to the slab cooling yard occurred due to the heat insulation pit being full. Therefore, the rolling order including the interposition of the temporary heat retaining pit material could be automatically determined without reducing the rolling efficiency.
１ 連続鋳造機
２ 熱間圧延機
３ 鋳片放冷ヤード
４ 仮置き保熱ピット
５ 加熱炉
５１ 通常温度装入用加熱炉
５２ 通常温度装入用加熱炉
５３ 高温装入用加熱炉
６ 加熱計算機
７ 圧延計算機
８ 鋳造計算機
９ ＰＬＣ
DESCRIPTION OF SYMBOLS 1
Claims (2)
前記差し合い操業中に、前記連続鋳造機から抽出され高温装入用の加熱炉に直接装入される高温装入鋳片Ａと、前記連続鋳造機から抽出され一旦高温鋳片専用の仮置き保熱ピットに仮置きされ保熱された後に高温装入用の加熱炉に装入される高温装入鋳片Ｂとのどちらを前記高温装入用の加熱炉に装入すべきか判定する加熱・圧延順序判定手段と、前記加熱・圧延順序判定後の前記差し合い操業時の圧延スケジュールが所定の圧延制約条件を充足するか否かを判定する圧延制約判定手段と、
前記圧延制約条件を充足する圧延スケジュールに基づいて圧延プロセスを制御する圧延制御手段と、
を備え、
前記加熱・圧延順序判定手段は、先に高温装入用の加熱炉に装入済みの高温装入鋳片Ｄの圧延順序を決定しておき、続いて、未装入の前記高温装入鋳片ＡまたはＢの圧延順序を決定する際に、
前記連続鋳造機から抽出され高温装入用の加熱炉に直接装入される予定の高温装入鋳片Ａと、前記連続鋳造機から抽出され一旦高温鋳片専用の仮置き保熱ピットに仮置きされ保熱されている高温装入鋳片Ｂとの両方を差し合いの候補とし、差し合い本数が多い方を採用して、高温装入用の加熱炉に装入するものとすることを特徴とする熱間圧延の圧延順序決定システム。 In the synchronous operation of the steel making process by a continuous casting machine and the rolling process having a plurality of heating furnaces and sequentially taking out slabs from one heating furnace and hot rolling with a hot rolling mill, After being extracted and directly charged into a heating furnace for high-temperature charging, and extracted from the continuous casting machine, temporarily placed in a temporary heat-retaining pit dedicated to high-temperature slabs, and then kept warm A high-temperature charging slab B charged in the high-temperature charging furnace, and a normal-temperature heating furnace extracted from the continuous casting machine and placed in the slab cooling yard and allowed to cool A rolling order determination system during a mating operation of hot rolling with the hot rolling mill while mating with a normal temperature charging slab C charged into
During the mating operation, the high-temperature charged slab A extracted from the continuous casting machine and directly charged into a high-temperature charging furnace, and the temporary placement once extracted from the continuous casting machine and dedicated to the high-temperature slab. Heating to determine which one should be charged into the high-temperature charging furnace, which is temporarily placed in the heat-retaining pit and heated and then charged into the high-temperature charging slab B charged into the high-temperature charging furnace Rolling order determination means, rolling restriction determination means for determining whether a rolling schedule during the mating operation after the heating / rolling order determination satisfies a predetermined rolling restriction condition,
Rolling control means for controlling the rolling process based on a rolling schedule that satisfies the rolling constraint conditions;
With
The heating and rolling order determination means, previously advance to determine the rolling sequence of charging already hot instrumentation Nyui piece D in a heating furnace of a high temperature instrumentation necessity, followed by the hot instrumentation of MiSoIri Nyui When determining the rolling order of pieces A or B,
Temporary charging slab A extracted from the continuous casting machine and to be directly charged into a high temperature charging furnace, and temporarily placed in a temporary heat retaining pit extracted from the continuous casting machine and dedicated to the high temperature slab. It is assumed that both the high-temperature charging cast slab B placed and heat-retained are candidates for mating, and the one with a large number of mating is adopted and charged into a heating furnace for high-temperature charging. rolling order determination system hot rolling shall be the features.
前記差し合い操業中に、前記連続鋳造機から抽出され高温装入用の加熱炉に直接装入される高温装入鋳片Ａと、前記連続鋳造機から抽出され一旦高温鋳片専用の仮置き保熱ピットに仮置きされ保熱された後に高温装入用の加熱炉に装入される高温装入鋳片Ｂとのどちらを前記高温装入用の加熱炉に装入すべきか判定する加熱・圧延順序判定工程と、
前記加熱・圧延順序判定後の前記差し合い操業時の圧延スケジュールが所定の圧延制約条件を充足するか否かを判定する圧延制約判定工程と、
前記圧延制約条件を充足する圧延スケジュールに基づいて圧延プロセスを制御する圧延制御工程と、
を有し、
前記加熱・圧延順序判定工程は、先に高温装入用の加熱炉に装入済みの高温装入鋳片Ｄの圧延順序を決定しておき、続いて、未装入の前記高温装入鋳片ＡまたはＢの圧延順序を決定する際に、
前記連続鋳造機から抽出され高温装入用の加熱炉に直接装入される予定の高温装入鋳片Ａと、前記連続鋳造機から抽出され一旦高温鋳片専用の仮置き保熱ピットに仮置きされ保熱されている高温装入鋳片Ｂとの両方を差し合いの候補とし、差し合い本数が多い方を採用して、高温装入用の加熱炉に装入するものとすることを特徴とする熱間圧延の圧延順序決定方法。
In the synchronous operation of the steel making process by a continuous casting machine and the rolling process having a plurality of heating furnaces and sequentially taking out slabs from one heating furnace and hot rolling with a hot rolling mill, After being extracted and directly charged into a heating furnace for high-temperature charging, and extracted from the continuous casting machine, temporarily placed in a temporary heat-retaining pit dedicated to high-temperature slabs, and then kept warm A high-temperature charging slab B charged in the high-temperature charging furnace, and a normal-temperature heating furnace extracted from the continuous casting machine and placed in the slab cooling yard and allowed to cool A rolling order determination method during a mating operation of hot rolling with the hot rolling mill while mating with a normal temperature charging slab C charged into
During the mating operation, the high-temperature charged slab A extracted from the continuous casting machine and directly charged into a high-temperature charging furnace, and the temporary placement once extracted from the continuous casting machine and dedicated to the high-temperature slab. Heating to determine which one should be charged into the high-temperature charging furnace, which is temporarily placed in the heat-retaining pit and heated and then charged into the high-temperature charging slab B charged into the high-temperature charging furnace・ Rolling order judgment process,
A rolling constraint determination step for determining whether a rolling schedule during the mating operation after the heating / rolling sequence determination satisfies a predetermined rolling constraint condition; and
A rolling control step for controlling a rolling process based on a rolling schedule that satisfies the rolling constraint conditions;
Have
The heating and rolling the order determining step, previously advance to determine the rolling sequence of charging already hot instrumentation Nyui piece D in a heating furnace of a high temperature instrumentation necessity, followed by the hot instrumentation of MiSoIri Nyui When determining the rolling order of pieces A or B,
Temporary charging slab A extracted from the continuous casting machine and to be directly charged into a high temperature charging furnace, and temporarily placed in a temporary heat retaining pit extracted from the continuous casting machine and dedicated to the high temperature slab. It is assumed that both the high-temperature charging cast slab B placed and heat-retained are candidates for mating, and the one with a large number of mating is adopted and charged into a heating furnace for high-temperature charging. rolling order determination method of hot rolling shall be the features.
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