JP2015145513A - Determination method of operation guidance of steel mill - Google Patents

Determination method of operation guidance of steel mill Download PDF

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JP2015145513A
JP2015145513A JP2014017665A JP2014017665A JP2015145513A JP 2015145513 A JP2015145513 A JP 2015145513A JP 2014017665 A JP2014017665 A JP 2014017665A JP 2014017665 A JP2014017665 A JP 2014017665A JP 2015145513 A JP2015145513 A JP 2015145513A
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hot metal
facility
factory
steelmaking
operation guidance
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岩谷 敏治
Toshiharu Iwatani
敏治 岩谷
智和 足立
Tomokazu Adachi
智和 足立
裕基 山本
Yuki Yamamoto
裕基 山本
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Kobe Steel Ltd
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Kobe Steel Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a determination method of an operation guidance (a withdrawal start time Tin and a tapping completion time Tout) of a steel mill that do not decrease operation efficiency of the steel mill.SOLUTION: In a determination method of an operation guidance of a steel mill 1, the operation guidance is determined in an operation of the steel mill 1 with at least more than two of a desulfurization facility 5, a dephosphorization facility, and a decarbonization facility. A processing schedule every facility is assembled based on an operation pattern of the steel mill 1. A withdrawal start time Tin of molten iron to the steel mill 1 and a tapping completion time Tout of the molten steel from the steel mill 1 are calculated based on a molten iron charge gap and a molten iron withdrawal gap of each facility in the assembled processing schedule, and the calculated withdrawal start time Tin and tapping completion time Tout are determined as the operation guidance.

Description

本発明は、高炉から出銑された溶銑の処理を行う製鋼工場の操業ガイダンスを決定する技術に関する。   The present invention relates to a technique for determining operation guidance for a steelmaking factory that processes hot metal discharged from a blast furnace.

周知の通り、高炉から出銑された溶銑は、混銑車や溶銑鍋に装入され溶銑の処理を行う製鋼工場に搬送される。
この混銑車においては、脱硫処理や脱りん処理が行われることがある(特許文献1を参照)。また、脱硫処理や脱りん処理が混銑車において行われた場合、製鋼工場においては、脱炭処理が主として行われることとなる(特許文献2を参照)。
As is well known, the hot metal discharged from the blast furnace is loaded into a kneading car or hot metal ladle and transported to a steelmaking factory where the hot metal is processed.
In this kneading vehicle, a desulfurization process and a dephosphorization process may be performed (refer patent document 1). Moreover, when desulfurization processing or dephosphorization processing is performed in a kneading vehicle, decarburization processing is mainly performed in a steelmaking factory (see Patent Document 2).

特開2012−17521号公報JP 2012-17521 A 特開2006−322020号公報JP 2006-322020 A

上記したような溶銑処理を行うに際しては、製鋼工場に混銑車が到着して溶銑が払出しされる時刻(払出開始時刻Tin)と、脱炭処理が完了して溶鋼が製鋼工場から出鋼される時刻(出鋼完了時刻Tout)との管理が非常に重要となる。
従来の製鋼工場では、払出開始時刻Tinの間隔と出鋼完了時刻Toutの間隔を一定としていた。例えば、図1Aに例示するように、払出開始時刻Tinが、10:20→10:40→11:00のように20分間隔で設定され、出鋼完了時刻Toutも、11:20→11:40→12:00のように20分間隔で設定されている。
When performing the hot metal treatment as described above, the time when the molten steel arrives at the steelmaking factory and the hot metal is discharged (dispensing start time Tin), and the decarburization process is completed and the molten steel is output from the steelmaking factory. Management with time (steeling completion time Tout) is very important.
In a conventional steel factory, the interval between the payout start time Tin and the interval between the steelmaking completion times Tout is constant. For example, as illustrated in FIG. 1A, the payout start time Tin is set at intervals of 20 minutes such as 10: 20 → 10: 40 → 11: 00, and the steel output completion time Tout is also 11: 20 → 11: It is set at intervals of 20 minutes such as 40 → 12: 00.

すなわち、製鋼工場での転炉の操業には、1チャージの出鋼までに、排滓、スクラップ装入、溶銑の装入、吹練、調質、出鋼と一連の作業があり、その作業時間の総和+予備時間で処理時間を設定し、払出開始時刻Tinの間隔と出鋼完了時刻Toutの間隔とが一定となるように設定していた。
このように設定された払出開始時刻Tinと出鋼完了時刻Toutは、操業ガイダンスとしてオペレータに提示され、オペレータは、提示された操作ガイダンスを遵守するように、混銑車の運行や製鋼工場内の処理のスケジュールを組み立て、操業を行っていた。
In other words, the operation of a converter at a steelmaking factory includes a series of operations, such as slagging, scrap charging, hot metal charging, blowing, refining, and steel extraction, up to one charge. The processing time was set as the sum of time + preliminary time, and the interval between the payout start time Tin and the interval between the steeling completion times Tout was set to be constant.
The payout start time Tin and the steelmaking completion time Tout set in this way are presented to the operator as operation guidance, and the operator operates the chaotic vehicle and processes in the steelmaking plant so as to comply with the presented operation guidance. The schedule was assembled and operated.

しかしながら、近年、生産量を向上させたり、生産コストを低減させるという要望が一層高まってきており、これらに対応するため、製鋼工場において各設備を増設し、複数の溶銑処理を行うようになってきている。
例えば、混銑車での脱硫処理や脱りん処理を廃止し、製鋼工場にて、脱硫処理、脱りん処理、脱炭処理を行うようになってきている。また、脱硫装置や転炉が複数台設置され、各処理が並列的に行われている。
However, in recent years, there has been an increasing demand for improving the production volume and reducing the production cost, and in order to respond to these demands, each facility has been expanded and a plurality of hot metal treatments have been carried out in steelmaking plants. ing.
For example, the desulfurization process and the dephosphorization process in a kneading vehicle are abolished, and the desulfurization process, the dephosphorization process, and the decarburization process are performed in the steelmaking factory. In addition, a plurality of desulfurization apparatuses and converters are installed, and each process is performed in parallel.

このように複数の溶銑処理を製鋼工場で実施するに際しては、図1Aのように払出開始時刻Tin及び出鋼完了時刻Toutを一定の間隔(図例では20分間隔)で設定するようにすると、様々な側面で問題が発生することが現場の実績として挙がってきている。例えば、複数の処理を行う製鋼工場内での溶銑物流(溶銑鍋の取り回しなど)が追いつかず、溶銑処理スケジュールを組むことが不可能なケースが発生する虞がある。   Thus, when carrying out a plurality of hot metal treatments at a steelmaking factory, as shown in FIG. 1A, the payout start time Tin and the steelmaking completion time Tout are set at regular intervals (20 minutes in the example), The fact that problems occur in various aspects has been mentioned as a field experience. For example, there is a possibility that a hot metal distribution (such as handling of hot metal ladle) in a steelmaking factory that performs a plurality of treatments cannot catch up and a hot metal treatment schedule cannot be established.

そこで、本発明は、上記問題に鑑み、製鋼工場の稼働効率を低下させることがない、製鋼工場の操業ガイダンス(払出開始時刻Tin、出鋼完了時刻Tout)の決定方法を提供することを目的とする。   Therefore, in view of the above problems, the present invention has an object to provide a method for determining operation guidance (payout start time Tin, steelmaking completion time Tout) of a steelmaking factory that does not reduce the operating efficiency of the steelmaking factory. To do.

前記目的を達成するため、本発明においては以下の技術的手段を講じた。
すなわち、本発明にかかる製鋼工場の操業ガイダンスの決定方法は、脱硫設備、脱りん設備、脱炭設備の少なくとも2つ以上を備えた製鋼工場で操業を行うに際し、操業ガイダンスを決定する方法において、前記製鋼工場での操業パターンに基づいて前記設備ごとの
処理スケジュールを組み立て、組み立てた処理スケジュールにおける各設備での溶銑装入間隔及び溶銑払出間隔を基にして、製鋼工場への溶銑の払出開始時刻Tin、製鋼工場からの溶鋼の出鋼完了時刻Toutを求め、求めた払出開始時刻Tin及び出鋼完了時刻Toutを操業ガイダンスとして決定することを特徴とする。
In order to achieve the above object, the present invention takes the following technical means.
That is, the method for determining the operation guidance of the steelmaking factory according to the present invention is a method for determining operation guidance when operating in a steelmaking factory equipped with at least two of desulfurization equipment, dephosphorization equipment, and decarburization equipment. Assembling the processing schedule for each facility based on the operation pattern at the steelmaking factory, the hot metal dispensing start time to the steelmaking factory based on the hot metal charging interval and hot metal dispensing interval at each facility in the assembled processing schedule Tin is characterized in that a steelmaking completion time Tout of molten steel from a steelmaking factory is obtained, and the obtained dispensing start time Tin and steeling completion time Tout are determined as operation guidance.

好ましくは、前記操業パターンは、各設備で行われる脱りん又は脱硫の割合を基に決められているとよい。
好ましくは、処理対象となる溶銑の温度及び成分を加味して、前記設備ごとの処理スケジュールを組み立てるとよい。
好ましくは、前記設備ごとの処理スケジュールの決定及び前記払出開始時刻Tin及び出鋼完了時刻Toutの算出を、コンピュータシミュレーションにより行うとよい。
Preferably, the operation pattern is determined based on a rate of dephosphorization or desulfurization performed in each facility.
Preferably, the processing schedule for each piece of equipment may be assembled in consideration of the temperature and components of the hot metal to be processed.
Preferably, determination of the processing schedule for each facility and calculation of the payout start time Tin and the steel output completion time Tout may be performed by computer simulation.

本発明によれば、製鋼工場の稼働効率を低下させることがない、製鋼工場の操業ガイダンス(払出開始時刻Tin、出鋼完了時刻Tout)を決定することが可能となる。   ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to determine the operation guidance (dispensing start time Tin, steeling completion time Tout) of a steelmaking factory which does not reduce the operating efficiency of a steelmaking factory.

製鋼工程を模式的に示したものであり、従来の処理を示した図である。It is the figure which showed the steel manufacturing process typically and showed the conventional process. 製鋼工程を模式的に示したものであり、本実施形態の処理を示した図である。It is the figure which showed the steelmaking process typically and showed the process of this embodiment. 本実施形態の製鋼工場の模式図である。It is a schematic diagram of the steelmaking factory of this embodiment. 本実施形態の製鋼工程におけるガントチャートを示す図である(操業パターン1)。It is a figure which shows the Gantt chart in the steel manufacturing process of this embodiment (operation pattern 1). 本実施形態の製鋼工程におけるガントチャートを示す図である(操業パターン2)。It is a figure which shows the Gantt chart in the steel manufacturing process of this embodiment (operation pattern 2).

以下、本発明の実施形態に係る製鋼工場1の操業ガイダンスの決定方法について、図面に基づき説明する。
まず、溶銑の処理を行う工程について、従来の工程と比較しつつし詳しく説明する。
図1Aに示すように、従来の製鋼工程においては、まず、高炉から出銑した溶銑を混銑車115に装入し、混銑車115にて脱硫処理及び脱りん処理を行うために混銑車115を脱硫ステーション、脱りんステーションに移動する。脱硫ステーション、脱りんステーションでは、混銑車115の開口部に、ランスを挿入し気体酸素を吹き込む。このとき、精錬剤等も溶銑に吹き込むようにする。溶銑に向けて気体酸素及び精錬剤を吹き込むことによって溶銑の脱硫・脱りん処理を行う。
Hereinafter, the determination method of the operation guidance of the steelmaking factory 1 which concerns on embodiment of this invention is demonstrated based on drawing.
First, the process of performing hot metal processing will be described in detail while comparing with the conventional process.
As shown in FIG. 1A, in a conventional steelmaking process, first, molten iron discharged from a blast furnace is charged into a kneading wheel 115, and the kneading wheel 115 is subjected to desulfurization processing and dephosphorization processing in the kneading wheel 115. Move to desulfurization station and dephosphorization station. At the desulfurization station and the dephosphorization station, a lance is inserted into the opening of the kneading wheel 115 to blow gaseous oxygen. At this time, a refining agent or the like is also blown into the hot metal. Desulfurization / dephosphorization of hot metal is performed by blowing gaseous oxygen and a refining agent toward the hot metal.

脱硫・脱りん処理が完了した溶銑は、混銑車115に装入されたまま、製鋼工場101(転炉107が設備)まで移動し、製鋼工場101にて溶銑が払い出される。溶銑が払い出される時間は、払出開始時刻Tinであり、操業ガイダンスとして決まっている。
製鋼工場101では、払い出された溶銑は溶銑鍋に装入され、この溶銑鍋を介して転炉107に装入される。転炉107では、ランスにより酸素を吹き込むことにより溶銑の吹練が行われる。
The hot metal after the desulfurization / dephosphorization process is moved to the steelmaking factory 101 (the converter 107 is installed) while being charged in the kneading wheel 115, and the hot metal is discharged at the steelmaking factory 101. The time when the hot metal is dispensed is the dispensing start time Tin and is determined as operation guidance.
In the steelmaking factory 101, the discharged hot metal is charged into the hot metal ladle and charged into the converter 107 through the hot metal ladle. In the converter 107, hot metal is blown by blowing oxygen through a lance.

転炉107での吹練後、所定の炭素量となった溶鋼は、溶銑鍋に払い出され、製鋼工場101から出鋼されることとなる。処理後の溶鋼が出鋼する時間は、出鋼完了時刻Toutであり、操業ガイダンスとして決まっている。
以上述べた従来の製鋼工場101では、混銑車115から溶銑が払い出される時間である「払出開始時刻Tin」の間隔と、製鋼工場101から吹練後の溶銑が出鋼される時間である「出鋼完了時刻Tout」の間隔とが一定で設定されていた。例えば、図1Aに示すように、払出開始時刻Tinは、10:20、10:40、11:00・・・であり、出鋼完了時刻Toutは、11:20、11:40、12:00・・・である。なお、各チャージの処理時間は60分で一定の場合を例示している。
After the blowing in the converter 107, the molten steel having a predetermined carbon amount is discharged to the hot metal ladle and discharged from the steelmaking factory 101. The time for the molten steel to be processed after the treatment is the output completion time Tout, and is determined as operation guidance.
In the conventional steelmaking factory 101 described above, the interval between the “dispensing start time Tin”, which is the time when hot metal is discharged from the kneading wheel 115, and the time when hot metal after blowing from the steelmaking factory 101 is discharged “ The interval of “steel completion time Tout” was set constant. For example, as shown in FIG. 1A, the payout start time Tin is 10:20, 10:40, 11:00 ..., and the steel output completion time Tout is 11:20, 11:40, 12:00. ... The case where the processing time for each charge is fixed at 60 minutes is illustrated.

しかしながら、図1Bのように、各設備を増設した製鋼工場101において、複数の溶銑処理を行う場合、払出開始時刻Tin及び出鋼完了時刻Toutを予め決めた上で、各設備での処理を決定する(スケジュール組みを行う)手法では、数々の不都合が発生することが
判ってきており、最悪は、スケジュールを組むことができなくなる虞すらある。
図1B、図2には、上記の問題を解決できる本発明が適用される製鋼工場1であって、各設備を増設した製鋼工場1の例が模式的に示してある。
However, as shown in FIG. 1B, when a plurality of hot metal processes are performed in the steelmaking factory 101 with each facility added, the processing at each facility is determined after the dispensing start time Tin and the steelmaking completion time Tout are determined in advance. It has been found that there are a number of inconveniences in the method of performing (schedule composition), and in the worst case, there is a possibility that the schedule cannot be established.
FIG. 1B and FIG. 2 schematically show an example of a steelmaking factory 1 to which the present invention that can solve the above-mentioned problems is applied, and each facility is added.

まず、製鋼工場1について説明する。
図2には、本発明が適用される製鋼工場1であって、各設備を増設した製鋼工場1の例が模式的に示してある。製鋼工場1は、主に脱硫処理、脱りん処理を行う溶銑処理工場2と、主に脱炭処理を行う転炉工場3とからなり、本実施形態の場合、2つの建屋から構成されている。
First, the steel factory 1 will be described.
FIG. 2 schematically shows an example of a steelmaking factory 1 to which the present invention is applied, in which each facility is expanded. The steelmaking factory 1 is composed of a hot metal treatment factory 2 that mainly performs desulfurization treatment and dephosphorization treatment, and a converter factory 3 that mainly performs decarburization treatment. In the present embodiment, the steelmaking factory 1 is composed of two buildings. .

図2に示すように、2つの建屋は、西側に位置する第1建屋と、東側に位置する第2建屋とからなる。第1建屋と第2建屋とは、互いに離れていて、第1建屋が溶銑処理工場2、第2建屋が転炉工場3である。
以下、製鋼工場1のレイアウトを説明するにあたり、図2に示した東西南北の方角(図の上方が北)を用いるが、これは説明の便宜上であり、レイアウトを限定するものではない。
As shown in FIG. 2, the two buildings include a first building located on the west side and a second building located on the east side. The first building and the second building are separated from each other. The first building is the hot metal treatment factory 2 and the second building is the converter factory 3.
Hereinafter, in describing the layout of the steel factory 1, the east, west, south, and north directions shown in FIG. 2 (upward in the figure is north) are used for convenience of explanation, and the layout is not limited.

製鋼工場1を構成する溶銑処理工場2には、2基の払い出しステーション4と、2基の脱硫設備5と、1基の脱りん設備(脱りん炉6)とが配備されている。また、転炉工場3には、3基の脱炭設備(転炉7)が配備されている。
払い出しステーション4は、例えば、高炉から出銑した溶銑を搬送する混銑車15内の溶銑を、溶銑鍋8に装入する箇所であって、この実施形態では、溶銑処理工場2の北側に並ぶように2つ設置されている。2つの払い出しステーション4と高炉との間には、これらを結ぶための軌道9が敷設されている。したがって、高炉から出銑された溶銑が装入された混銑車15を軌道9上で移動させることにより、溶銑を高炉から払い出しステーション4に搬送することができる。
The hot metal treatment factory 2 constituting the steelmaking factory 1 is provided with two dispensing stations 4, two desulfurization facilities 5, and one dephosphorization facility (dephosphorization furnace 6). The converter factory 3 is provided with three decarburization facilities (converter 7).
The dispensing station 4 is a place where, for example, the hot metal in the kneading vehicle 15 that transports the hot metal discharged from the blast furnace is charged into the hot metal ladle 8, and in this embodiment, the hot metal processing plant 2 is arranged on the north side. Two are installed. Between the two payout stations 4 and the blast furnace, a track 9 for connecting them is laid. Therefore, the hot metal can be transported from the blast furnace to the discharge station 4 by moving the kneading wheel 15 loaded with the hot metal discharged from the blast furnace on the track 9.

脱硫設備5は、払い出しステーション4で溶銑鍋8に払い出された溶銑に対して脱硫処理を行うものであって、この実施形態では、払い出しステーション4の下流側に2つ設置されている。脱硫設備5では、例えば、溶銑が装入された溶銑鍋8内に、溶銑を撹拌するインペラを挿入し、インペラを回転させて溶銑を撹拌しながら脱硫材を当該溶銑に供給することにより、溶銑の脱硫を行うことができる(KR脱硫処理)。   The desulfurization equipment 5 performs desulfurization processing on the hot metal discharged to the hot metal ladle 8 at the discharge station 4. In this embodiment, two desulfurization facilities 5 are installed on the downstream side of the discharge station 4. In the desulfurization equipment 5, for example, an impeller that stirs the hot metal is inserted into the hot metal pan 8 in which the hot metal is charged, and the desulfurization material is supplied to the hot metal while rotating the impeller and stirring the hot metal. Can be desulfurized (KR desulfurization treatment).

除滓ステーション10は、溶銑上のスラグ等を除滓する除滓処理を行う箇所であって、この実施形態では、4つ設置されている。
脱りん炉6は、脱硫処理及び除滓処理が終了した溶銑に対して脱りん処理を行うもので、溶銑処理工場2の南西側に設置されている。この脱りん炉6では、脱硫処理が終了後の溶銑を脱りん炉6の炉前で装入した後、上吹きランスで酸素を吹き込みながら脱りん剤を投入することにより、溶銑の脱りんを行うことができる。
The removal station 10 is a place where a removal process for removing slag and the like on the hot metal is performed. In this embodiment, four removal stations 10 are provided.
The dephosphorization furnace 6 performs a dephosphorization process on the hot metal after the desulfurization process and the degassing process, and is installed on the southwest side of the hot metal processing factory 2. In this dephosphorization furnace 6, the hot metal after desulfurization treatment is charged in front of the furnace of the dephosphorization furnace 6, and then dephosphorization of the hot metal is performed by introducing a dephosphorizing agent while blowing oxygen with an upper blowing lance. It can be carried out.

さらに、製鋼工場1には、除滓ステーション10で除滓した溶銑が装入された溶銑鍋8を、溶銑処理工場2の脱りん炉6ではなく、転炉工場3に設置された処理炉に搬送するための搬送手段が設けられている。この搬送手段は、溶銑処理工場2の東側から転炉工場3に向けて敷設された軌道9と、この軌道9上を移動して溶銑鍋8を搬送する搬送台車12とを備えている。なお、搬送台車12は、軌道9上を移動する機関車によって牽引されるようになっている。   Further, in the steelmaking factory 1, the hot metal ladle 8 charged with the hot metal removed from the hot metal removal station 10 is used as a treatment furnace installed in the converter factory 3 instead of the dephosphorization furnace 6 of the hot metal treatment factory 2. Conveying means for conveying is provided. This transport means includes a track 9 laid from the east side of the hot metal treatment plant 2 toward the converter plant 3 and a transport carriage 12 that moves on the track 9 and transports the hot metal ladle 8. Note that the transport carriage 12 is pulled by a locomotive that moves on the track 9.

次に、製鋼工場1での操業の概略について説明する。
製鋼工場1の操業方法を行うにあたっては、まず、混銑車15が溶銑処理工場2の払い出しステーション4に到達後、2基の払い出しステーション4にて溶銑の払い出しを行う。その後、溶銑鍋8を4基の除滓ステーション10に移動して当該除滓ステーション10でそれぞれ除滓処理(前除滓処理)を行う。除滓ステーション10で前除滓処理後、溶銑鍋8を2基の脱硫設備5に移動する。そして、それぞれの脱硫設備5にて脱硫処理を行い、脱硫処理後、溶銑鍋8を再び4基の除滓ステーション10に移動する。除滓ステーション10では、脱硫処理後の溶銑に対して除滓処理(後除滓処理)を行う。
Next, the outline of the operation at the steelmaking factory 1 will be described.
In performing the operation method of the steelmaking factory 1, first, after the kneading vehicle 15 reaches the dispensing station 4 of the hot metal treatment factory 2, the molten iron is dispensed at the two dispensing stations 4. Thereafter, the hot metal ladle 8 is moved to the four removal stations 10 and the removal process (pre-treatment process) is performed in the removal station 10. After the preliminary removal process at the removal station 10, the hot metal ladle 8 is moved to two desulfurization facilities 5. And each desulfurization equipment 5 performs a desulfurization process, and after a desulfurization process, the hot metal ladle 8 is moved to the four demetalization stations 10 again. In the removal station 10, a removal process (post-removal process) is performed on the molten iron after the desulfurization process.

少なくとも1基の除滓ステーション10で除滓処理後の溶銑は、溶銑処理工場2の脱りん炉6で脱りんを行い、脱りんが終了した溶銑は、溶銑鍋8に装入されたまま、転炉工場
3へ運ばれ、転炉工場3の転炉7にて脱炭処理が行われる。脱炭処理が完了した溶鋼は、転炉工場3すなわち製鋼工場1から出鋼される。
以上述べたような複数の処理設備(脱硫設備5、脱りん炉6、転炉7など)を含む製鋼工場1において、複数の溶銑処理を行う場合、予め払出開始時刻Tin及び出鋼完了時刻Toutを決めた上で、各処理を決定する(スケジュール組みを行う)手法が採用されていた。しかしながら、この手法では、数々の不都合が発生し、最悪は、スケジュールを組むことができなくなる虞があることは、「発明が解決しようとする課題」で述べたとおりである。
The molten iron after the removal treatment in at least one of the removal stations 10 is dephosphorized in the dephosphorization furnace 6 of the hot metal treatment plant 2, and the molten iron after the dephosphorization is charged in the hot metal ladle 8, Carried to the converter factory 3, decarburization processing is performed in the converter 7 of the converter factory 3. The molten steel that has been decarburized is discharged from the converter factory 3, that is, the steelmaking factory 1.
In the steelmaking factory 1 including a plurality of treatment facilities as described above (desulfurization facility 5, dephosphorization furnace 6, converter 7, etc.), when performing a plurality of hot metal treatments, the dispensing start time Tin and the steel removal completion time Tout are previously performed. A method for determining each process (making a schedule) was adopted. However, as described in the “Problems to be Solved by the Invention”, there are a number of inconveniences caused by this method, and in the worst case, there is a possibility that the schedule cannot be established.

そこで、本発明では、以下の方法で、製鋼工場1への払出開始時刻Tin、出鋼完了時刻Toutなどの操業ガイダンスを決めるようにしている。
まず、図1Bや図2のような製鋼工場1(溶銑処理工場2及び転炉工場3)では、「操業パターン」といわれる「溶銑処理をどの設備でどの程度実施するかのパターン」が存在する。
Therefore, in the present invention, operation guidance such as a payout start time Tin to the steelmaking factory 1 and a steel output completion time Tout is determined by the following method.
First, in the steelmaking factory 1 (a hot metal processing factory 2 and a converter factory 3) as shown in FIG. 1B and FIG. 2, there is a “pattern of how much hot metal processing is performed with which equipment”, which is called an “operation pattern”. .

例えば、脱りんに関し、溶銑処理工場2の脱りん炉6で全体の75%の脱りんを行い、転炉工場3に設置された転炉7(1号転炉)で25%の脱りんを行うパターンが存在する。このパターンを操業パターン1とする。他に、溶銑処理工場2の脱りん炉6で全体の50%の脱りんを行い、転炉工場3の転炉7(1号転炉)で50%の脱りんを行うパターン(操業パターン2)が考えられる。なお、操業パターンは、脱りんだけでなく、脱硫処理をもとに設定してもよい。   For example, with respect to dephosphorization, 75% of the total dephosphorization is performed in the dephosphorization furnace 6 of the hot metal treatment plant 2, and 25% of dephosphorization is performed in the converter 7 (No. 1 converter) installed in the converter plant 3. There is a pattern to do. This pattern is referred to as operation pattern 1. In addition, 50% of the total dephosphorization is performed in the dephosphorization furnace 6 of the hot metal treatment plant 2, and 50% of dephosphorization is performed in the converter 7 of the converter plant 3 (No. 1 converter) (operation pattern 2). ) Is considered. The operation pattern may be set based on desulfurization treatment as well as dephosphorization.

このような脱りんの操業パターンごとに、各設備における最適なスケジュール組みを行う。スケジュール組みは、コンピュータシミュレーションにより行うとよい。図3は、操業パターン1におけるガントチャートを示し、図4は、操業パターン2におけるガントチャートを示す。
このように、製鋼工場1における操業パターンを決定し、その操業パターンをもとに、最適な各設備のスケジュール組み、すなわち各設備ごとの最適な装入間隔、払出間隔を設定する。それらを基にし、オペレータに提示する操業ガイダンスである「払出開始時刻Tin」、「出鋼完了時刻Tout」を決定する。決定された操業ガイダンスは、例えば、図1Bに示すように、払出開始時刻Tinは、10:30、10:50、11:00・・・であり、出鋼完了時刻Toutは、13:00、13:20、13:30・・・である。なお、各チャージの処理時間は150分で一定の場合を例示している。
For each dephosphorization operation pattern, an optimal schedule is set for each facility. The schedule composition may be performed by computer simulation. FIG. 3 shows a Gantt chart in the operation pattern 1, and FIG. 4 shows a Gantt chart in the operation pattern 2.
Thus, the operation pattern in the steel factory 1 is determined, and based on the operation pattern, the optimum schedule set for each facility, that is, the optimum charging interval and dispensing interval for each facility is set. Based on these, “payout start time Tin” and “steeling completion time Tout”, which are operation guidance presented to the operator, are determined. In the determined operation guidance, for example, as shown in FIG. 1B, the payout start time Tin is 10:30, 10:50, 11:00..., And the steel output completion time Tout is 13:00. 13:20, 13:30... The case where the processing time for each charge is fixed at 150 minutes is illustrated.

このようにして決定された操業ガイダンスは、時間間隔は一定ではないものの、製鋼工場1における各設備の最適なスケジュールを反映したものであり、溶銑物流などに齟齬が発生しない最適な溶銑処理が行えるものとなっている。
この操業ガイダンス(払出開始時刻Tin、出鋼完了時刻Toutなど)をオペレータに示すことで、溶銑物流などに齟齬が発生しない最適な溶銑処理が行えるようになる。
The operation guidance determined in this way reflects the optimum schedule of each facility in the steelmaking plant 1 although the time interval is not constant, and can perform the optimum hot metal treatment in which no hot metal is generated in the hot metal distribution or the like. It has become a thing.
By showing this operation guidance (dispensing start time Tin, steeling completion time Tout, etc.) to the operator, it is possible to perform an optimum hot metal treatment in which no hot metal is generated in the hot metal distribution.

このような操業ガイダンス(操業パターンを基にして得られた操業ガイダンス)による操業を行った際には、その実績を記録しておく。例えば、払出開始時刻Tin、出鋼完了時刻Toutだけでなく、脱硫設備5の装入間隔、払出間隔などを記録しておく。同時に、脱りん炉6の装入間隔、払出間隔、転炉7(第1転炉〜第3転炉)の装入間隔、払出間隔など記録しておく。   When an operation based on such operation guidance (operation guidance obtained based on the operation pattern) is performed, the result is recorded. For example, not only the payout start time Tin and the steel output completion time Tout but also the charging interval and the payout interval of the desulfurization facility 5 are recorded. At the same time, the charging interval and discharging interval of the dephosphorization furnace 6, the charging interval and discharge interval of the converter 7 (first converter to third converter) are recorded.

例えば、図3に示す操業パターン1の場合、2号転炉の出鋼から3号転炉の出鋼までの間隔(払出間隔)は短い。とはいえ、払出開始時刻Tinは第1払い出しステーション4、第2払い出しステーション4で同じ間隔である。
これに対し、図4に示す操業パターン2の場合、2号転炉の出鋼から3号転炉の出鋼までの間隔(払出間隔)が短い状況は同じであり、払出開始時刻Tinの間隔(払出間隔)は第2払い出しステーション4から第1払い出しステーション4の間も短く、代わりに、第1払い出しステーション4から第2払い出しステーション4の間は長い。このような装入間隔、払出間隔の変化は、操業のパターンに依存し、転炉7の払出間隔(転炉7の出鋼間隔)が等しい操業パターンも存在する。
For example, in the case of the operation pattern 1 shown in FIG. 3, the interval (dispensing interval) from the output of the No. 2 converter to the output of the No. 3 converter is short. However, the payout start time Tin is the same interval at the first payout station 4 and the second payout station 4.
On the other hand, in the case of operation pattern 2 shown in FIG. 4, the situation where the interval from the No. 2 converter tapping to the No. 3 converter tapping (dispensing interval) is the same is the same, and the interval of the dispensing start time Tin The (payout interval) is short between the second payout station 4 and the first payout station 4, and instead is long between the first payout station 4 and the second payout station 4. Such changes in the charging interval and the discharge interval depend on the operation pattern, and there are operation patterns in which the discharge interval of the converter 7 (the steel discharge interval of the converter 7) is equal.

上記した状況を反映すべく、操業ガイダンスによる操業を行った際には、その実績を記
録しておく。その後、出鋼量が多い乃至は出鋼間隔が短いなどの成績のよい操業パターンが得られるごとに、その操業パターンに基づいた操業ガイダンスを、現状の操業ガイダンスに置き換えた上で、オペレータに提示するとよい。
なお、高炉の溶銑のSi量が高ければ脱りん時間は長くなり、溶銑温度が低ければ脱硫時間は長くなる。言い換えれば、操業パターンが同じであっても、処理環境により操業ガイダンスが異なるようになる。
In order to reflect the above situation, record the results of operations when operating according to operation guidance. After that, every time a good operation pattern such as a large amount of steel output or a short steel output interval is obtained, the operation guidance based on the operation pattern is replaced with the current operation guidance and presented to the operator. Good.
The dephosphorization time becomes longer when the amount of Si in the hot metal in the blast furnace is higher, and the desulfurization time becomes longer when the hot metal temperature is lower. In other words, even if the operation pattern is the same, the operation guidance varies depending on the processing environment.

したがって、選択した操業パターンと当日の状況により、各設備の装入間隔、払出間隔を再設定できるようにするとよい。再設定後は、再度スケジュール組みを実施し、操業ガイダンス(払出開始時刻Tin、出鋼完了時刻Tout)を算出し、オペレータに提示するとよい。
以上のように、製鋼工場1での操業パターンに基づいて各設備ごとの処理スケジュールを組み立て、組み立てた処理スケジュールにおける各設備での装入間隔及び払出間隔を基にして、製鋼工場1への溶銑の払出開始時刻Tin、製鋼工場1からの溶鋼の出鋼完了時刻Toutを求めることで、製鋼工場1の稼働効率を低下させることがない操業ガイダンス(払出開始時刻Tinと出鋼完了時刻Tout)の決定することが可能となる。
Therefore, it is preferable that the charging interval and the dispensing interval of each facility can be reset according to the selected operation pattern and the situation on the day. After resetting, it is advisable to schedule again and calculate operation guidance (payout start time Tin, steel output completion time Tout) and present it to the operator.
As described above, the processing schedule for each facility is assembled based on the operation pattern at the steel plant 1, and the hot metal to the steel plant 1 is based on the charging interval and the dispensing interval at each facility in the assembled processing schedule. The operation guidance (dispensation start time Tin and steelmaking completion time Tout) that does not reduce the operating efficiency of the steelmaking factory 1 by obtaining the steel dispensing factory start time Tin and the steelmaking completion time Tout of the molten steel from the steelmaking factory 1 It becomes possible to decide.

なお、今回開示された実施形態において、明示的に開示されていない事項、例えば、運転条件や操業条件、各種パラメータ、構成物の寸法、重量、体積などは、当業者が通常実施する範囲を逸脱するものではなく、通常の当業者であれば、容易に想定することが可能な事項を採用している。   It should be noted that matters not explicitly disclosed in the embodiment disclosed this time, such as operating conditions and operating conditions, various parameters, dimensions, weights, volumes, and the like of a component, deviate from the range normally practiced by those skilled in the art. However, matters that can be easily assumed by those skilled in the art are employed.

1 製鋼工場
2 溶銑処理工場
3 転炉工場
4 払い出しステーション
5 脱硫設備
6 脱りん炉
7 転炉
8 溶銑鍋
9 軌道
10 除滓ステーション
12 搬送台車
DESCRIPTION OF SYMBOLS 1 Steelmaking factory 2 Hot metal processing factory 3 Converter factory 4 Dispensing station 5 Desulfurization equipment 6 Dephosphorization furnace 7 Converter 8 Hot metal ladle 9 Orbit 10 Demolition station 12 Carriage cart

Claims (4)

脱硫設備、脱りん設備、脱炭設備の少なくとも2つ以上を備えた製鋼工場で操業を行うに際し、操業ガイダンスを決定する方法において、
前記製鋼工場での操業パターンに基づいて前記設備ごとの処理スケジュールを組み立て、
組み立てた処理スケジュールにおける各設備での溶銑装入間隔及び溶銑払出間隔を基にして、製鋼工場への溶銑の払出開始時刻Tin、製鋼工場からの溶鋼の出鋼完了時刻Toutを求め、
求めた払出開始時刻Tin及び出鋼完了時刻Toutを操業ガイダンスとして決定する
ことを特徴とする製鋼工場の操業ガイダンスの決定方法。
When operating at a steel mill equipped with at least two of a desulfurization facility, a dephosphorization facility, and a decarburization facility,
Assemble the processing schedule for each facility based on the operation pattern in the steelmaking factory,
Based on the hot metal charging interval and hot metal discharge interval at each facility in the assembled processing schedule, find the hot metal discharge start time Tin to the steelmaking factory, and the hot steel discharge completion time Tout of the molten steel from the steelmaking factory,
A method for determining operation guidance of a steel mill, wherein the determined payout start time Tin and steelmaking completion time Tout are determined as operation guidance.
前記操業パターンは、各設備で行われる脱りん又は脱硫の割合を基に決められていることを特徴とする請求項1に記載の製鋼工場の操業ガイダンスの決定方法。   The said operation pattern is determined based on the ratio of the dephosphorization or desulfurization performed by each installation, The determination method of the operation guidance of the steelmaking factory of Claim 1 characterized by the above-mentioned. 処理対象となる溶銑の温度及び成分を加味して、前記設備ごとの処理スケジュールを組み立てることを特徴とする請求項1又は2に記載の製鋼工場の操業ガイダンスの決定方法。   The method for determining operation guidance for a steelmaking factory according to claim 1 or 2, wherein a processing schedule for each piece of equipment is assembled in consideration of the temperature and components of the hot metal to be processed. 前記設備ごとの処理スケジュールの決定及び前記払出開始時刻Tin及び出鋼完了時刻Toutの算出を、コンピュータシミュレーションにより行うことを特徴とする請求項1〜3のいずれかに記載の製鋼工場の操業ガイダンスの決定方法。   The determination of the processing schedule for each facility and the calculation of the payout start time Tin and the steel output completion time Tout are performed by computer simulation. Decision method.
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