JP4789757B2 - Converter operating method and converter equipment - Google Patents

Converter operating method and converter equipment Download PDF

Info

Publication number
JP4789757B2
JP4789757B2 JP2006248403A JP2006248403A JP4789757B2 JP 4789757 B2 JP4789757 B2 JP 4789757B2 JP 2006248403 A JP2006248403 A JP 2006248403A JP 2006248403 A JP2006248403 A JP 2006248403A JP 4789757 B2 JP4789757 B2 JP 4789757B2
Authority
JP
Japan
Prior art keywords
converter
furnace
dephosphorization
decarburization
scrap
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 - Fee Related
Application number
JP2006248403A
Other languages
Japanese (ja)
Other versions
JP2008069400A (en
Inventor
康一郎 瀬村
正信 中村
岳志 稲葉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kobe Steel Ltd
Original Assignee
Kobe Steel Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP2006248403A priority Critical patent/JP4789757B2/en
Publication of JP2008069400A publication Critical patent/JP2008069400A/en
Application granted granted Critical
Publication of JP4789757B2 publication Critical patent/JP4789757B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Landscapes

  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Description

本発明は、転炉の操業方法及び転炉設備に関する。   The present invention relates to a converter operating method and converter equipment.

従来より、転炉設備では、脱りん用の転炉（以降、脱りん炉ということがある）と脱炭用の転炉と（以降、脱炭炉ということがある）を並列に並べ、脱りん炉で脱りん処理を行った後に脱炭炉で脱炭処理を行っている（例えば、特許文献１〜３）。
脱りん処理が終了すると、溶銑は脱りん炉から出湯されて取鍋に入れられ、この取鍋は第１のクレーン（以降、溶湯クレーンということがある）で吊り上げられて脱炭炉まで搬送される。そして、搬送された溶銑は脱炭炉に装入されることとなる。
溶銑が脱炭炉に装入される前には、スクラップヤードから脱炭炉に向けて第２のクレーン（スクラップクレーンということがある）によってスクラップが搬送され、このスクラップが溶銑が脱炭炉に装入される前に脱炭炉に入れられることとなる。 Conventionally, in converter facilities, a dephosphorization converter (hereinafter sometimes referred to as a dephosphorization furnace) and a decarburization converter (hereinafter sometimes referred to as a decarburization furnace) are arranged in parallel, After dephosphorization processing in a phosphorus furnace, decarburization processing is performed in a decarburization furnace (for example, Patent Documents 1 to 3).
When the dephosphorization process is completed, the hot metal is discharged from the dephosphorization furnace and put into a ladle. This ladle is lifted by a first crane (hereinafter sometimes referred to as a molten metal crane) and conveyed to the decarburization furnace. The And the hot metal conveyed will be charged into the decarburization furnace.
Before hot metal is charged into the decarburization furnace, scrap is transported from the scrap yard to the decarburization furnace by a second crane (sometimes called a scrap crane), and this scrap is transferred to the decarburization furnace. It will be put into a decarburization furnace before being charged.

即ち、転炉の操業では、脱りん炉に溶銑装入→脱りん処理→脱りん炉から溶銑を出湯→溶銑を溶湯クレーンを介して脱炭炉に搬送→スクラップヤードのスクラップをスクラップクレーンを用いて脱炭炉に搬送→脱炭炉にスクラップを装入→脱りん処理が終わった溶銑を溶湯クレーンを介して脱炭炉に装入→脱炭処理→脱炭炉から溶鋼を出湯するという作業が繰り返し行われている。
特許第３５０３９３８号 特開２００６−１１７９７３号公報 特許第２７６８２０９号 That is, in the operation of the converter, molten iron is charged into the dephosphorization furnace → dephosphorization process → hot metal is discharged from the dephosphorization furnace → hot metal is conveyed to the decarburization furnace via the molten metal crane → scrap scrap in the scrap yard is used with a scrap crane Then transport to the decarburization furnace → load scrap into the decarburization furnace → insert the molten iron after dephosphorization treatment into the decarburization furnace via the smelting crane → decarburization process → discharge the molten steel from the decarburization furnace Has been repeated.
Japanese Patent No. 3503938 JP 2006-117773 A Patent No. 2768209

従来の転炉の操業方法で、溶湯クレーンの動きとスクラップクレーンの動きとを考えた場合、溶銑やスクラップの搬送工程において溶湯クレーンとスクラップクレーンとが干渉する可能性がある。
このような場合には、溶湯クレーンとスクラップクレーンとが干渉しないように、溶湯クレーンを一時的に待機させたり、或いは、スクラップクレーンを待機させる必要があり、脱りん工程や脱炭工程を含めた処理における全体のサイクルタイムを延長せざる得ない問題が生ずることになる。 In the conventional converter operation method, when the movement of the molten metal crane and the movement of the scrap crane are considered, there is a possibility that the molten metal crane and the scrap crane interfere with each other in the hot metal and scrap conveying process.
In such a case, it is necessary to temporarily wait for the molten metal crane or to wait for the scrap crane so that the molten metal crane and the scrap crane do not interfere with each other, including a dephosphorization process and a decarburization process. The problem arises that the overall cycle time in the process must be extended.

また、転炉設備では、転炉内の耐火物等を修復又は交換するという炉修作業が必要であり、それぞれの転炉で炉修作業が重なった場合には、脱りん処理や脱炭処理を行うことができなくなったり、脱りん処理及び脱炭処理を炉修を行っていない他の転炉で実施する必要があり、サイクルタイムが延びたり、低温で脱りん処理ができないことから副原料の使用量が増加する恐れがあった。また、炉修作業が重ならないようにするために各転炉の想定される寿命に対して相当早く炉を切り替える等、転炉の耐火物を使いきらない段階で操業をしていた。   In addition, in the converter equipment, furnace repair work is required to repair or replace refractories in the converter, and when furnace repair work overlaps in each converter, dephosphorization or decarburization It is necessary to carry out dephosphorization treatment and decarburization treatment in other converters that have not undergone furnace repair, and the cycle time is extended and dephosphorization treatment cannot be performed at low temperatures. There was a risk that the amount of use increased. In addition, in order to prevent the furnace repair work from overlapping, the operation was performed at a stage where the refractory of the converter was not used up, such as switching the furnace considerably earlier than the expected life of each converter.

そこで、本発明は、上記問題点に鑑み、溶銑やスクラップの物流をスムーズにすることができ、脱りん工程や脱炭工程を含めた全体のサイクルタイムを延長することなく、溶湯クレーンとスクラップクレーンとの干渉を防止することができると共に、効率よく転炉の操業を行うことができる転炉の操業方法及び転炉設備を提供することを目的とする。   Therefore, in view of the above-mentioned problems, the present invention can smooth the distribution of hot metal and scrap, and without increasing the overall cycle time including the dephosphorization process and the decarburization process, the molten metal crane and the scrap crane It is an object of the present invention to provide a converter operating method and a converter facility capable of preventing the interference with the converter and efficiently operating the converter.

前記目的を達成するために、本発明は、次の手段を講じた。即ち、上流側から下流側に向けて順に並べられた３基の転炉と、前記転炉に上流側から溶湯を搬送する溶湯クレーンと、転炉に下流側からスクラップを搬送するスクラップクレーンとを有する転炉設備で、脱りん処理及び脱炭処理を行う転炉設備の操業方法において、最上流に配置された第１の転炉を脱りん炉として採用し、最下流に配置された第３の転炉を脱炭炉として採用し、第１の転炉と第３の転炉との間に配置された第２の転炉を脱りん処理又は脱炭処理を行う兼用炉として採用して、前記第１の転炉で行っていた脱りん処理または前記第３の転炉で行っていた脱炭処理を第２の転炉に切り替えて、脱りん処理及び脱炭処理を行う点にある。 In order to achieve the above object, the present invention has taken the following measures. That is, three converters arranged in order from the upstream side to the downstream side, a molten metal crane that conveys the molten metal from the upstream side to the converter, and a scrap crane that conveys scrap from the downstream side to the converter In the operation method of the converter equipment which performs dephosphorization processing and decarburization processing in the converter equipment having, the first converter arranged at the most upstream is adopted as the dephosphorization furnace, and the third arranged at the most downstream side. The converter is used as a decarburization furnace, and the second converter disposed between the first converter and the third converter is used as a dual-purpose furnace for dephosphorization or decarburization. The dephosphorization process performed in the first converter or the decarburization process performed in the third converter is switched to the second converter to perform the dephosphorization process and the decarburization process. .

これによれば、溶銑装入側に近い転炉を脱りん炉とし、スクラップ装入側に近い転炉を脱炭炉とすることによって、溶銑やスクラップの物流をスムーズにすることができ、脱りん工程や脱炭工程を含めた全体のサイクルタイムを延長することなく、溶湯クレーンとスクラップクレーンとの干渉を防止することができる。
これに加え、兼用炉によって、脱りん炉が炉修であるときは兼用炉で脱りん処理を行い、脱炭炉が炉修であるときは兼用炉で脱炭処理を行うことが可能となる。
これによって、脱りん処理と脱炭処理とを連続的に行うことができると共に、副原料の使用量が増加せず又転炉の耐火物を最大限に有効活用でき、効率よく転炉の操業を行うことができる。 According to this, by using a converter near the hot metal charging side as a dephosphorization furnace and a converter near the scrap charging side as a decarburization furnace, the distribution of hot metal and scrap can be made smooth. Interference between the molten metal crane and the scrap crane can be prevented without extending the overall cycle time including the phosphorus process and the decarburization process.
In addition to this, when the dephosphorization furnace is repaired, the dual-purpose furnace can perform dephosphorization processing in the dual-purpose furnace, and when the decarburization furnace is repaired, it can be decarburized in the dual-purpose furnace. .
As a result, dephosphorization and decarburization can be carried out continuously, the amount of secondary materials used is not increased, and the refractory of the converter can be utilized to the maximum extent, allowing efficient operation of the converter. It can be performed.

前記第１の転炉で行っていた脱りん処理を第２の転炉に切り替えるにあたっては、（ｉ）前記第１の転炉の予想寿命がきた時点で第２の転炉がスタンバイ状態であると想定される際には、実際に第１の転炉の予想寿命がきた時点で第１の転炉での脱りん処理を第２の転炉に切り替える、（ii）前記第１の転炉の予想寿命がくる時点で第２の転炉が炉修中であると想定される際には、第２の転炉における炉修の開始を早め、実際に第１の転炉の予想寿命がきた時点までに前記炉修を終了させてから第１の転炉での脱りん処理を第２の転炉に切り替える、（iii）前記第１の転炉の予想寿命がきた時点で第２の転炉が脱炭処理中であると想定される際には、実際に第１の転炉の予想寿命がきた時点で第２の転炉の脱炭処理を終了してから第１の転炉での脱りん処理を第２の転炉に切り替えるのいずれか１つを行うことが好ましい。   In switching the dephosphorization process performed in the first converter to the second converter, (i) the second converter is in a standby state when the expected life of the first converter is reached. When the expected life of the first converter is actually reached, the dephosphorization process in the first converter is switched to the second converter. (Ii) The first converter When it is assumed that the second converter is being repaired at the time when the expected life of the second converter is reached, the start of repair of the furnace in the second converter is accelerated, and the expected life of the first converter is actually The dephosphorization process in the first converter is switched to the second converter after the furnace repair is completed by the time when (i) the second life is reached when the expected life of the first converter is reached. When it is assumed that the converter is being decarburized, the first converter is completed after the decarburization process of the second converter is finished when the expected life of the first converter is actually reached. It is preferable to perform dephosphorization process one switch to the second of the converter of.

これによれば、第１の転炉が寿命に到達し、第１の転炉の炉修を行うために第１の転炉を一時的に休止したとしても、第２の転炉に処理を切り替えることで脱りん処理を途切れることなく連続的に行うことができ、副原料の使用量が増加せず又転炉の耐火物を最大限に有効活用でき、効率よく転炉の操業を行うことができる。
前記第１の転炉で行っていた脱りん処理を第２の転炉に切り替えて、その後、前記第２の転炉で行っている脱りん処理を第１の転炉に切り替えるに際し、（ｉｖ）第２の転炉と第３の転炉との炉修期間が重複せず且つ第２の転炉又は第３の転炉のいずれか一方が他方よりもが予想寿命が早いと想定される際には、一方の転炉が実際に予想寿命に達した時点で第２の転炉での脱りん処理を第１の転炉に切り替える、（ｖ）第２の転炉と第３の転炉との炉修期間が重複し且つ第２の転炉又は第３の転炉のいずれか一方が他方よりもが予想寿命がくると想定される際には、他方の転炉における炉修の開始を早め、実際に他方の転炉の予想寿命がくる時点までに前記炉修を終了させてから脱りん処理を第１の転炉に切り替えるのいずれか１つを行うことが好ましい。 According to this, even if the first converter reaches the end of its life and the first converter is temporarily suspended in order to repair the first converter, the second converter is treated. By switching, the dephosphorization process can be performed continuously without interruption, the amount of auxiliary materials used does not increase, the refractory of the converter can be used to the maximum, and the converter can be operated efficiently. Can do.
When the dephosphorization process performed in the first converter is switched to the second converter, and then the dephosphorization process performed in the second converter is switched to the first converter, (iv ) It is assumed that the repair periods of the second converter and the third converter do not overlap and that either the second converter or the third converter has an expected life earlier than the other. In this case, when one converter actually reaches the expected life, the dephosphorization process in the second converter is switched to the first converter. (V) The second converter and the third converter are switched. When it is assumed that the repair period of the furnace overlaps and either the second converter or the third converter has an expected life longer than the other, the repair of the other converter Any one of the following may be performed: the start of the reactor, the end of the furnace repair before the expected life of the other converter reaches the end, and the dephosphorization process being switched to the first converter. It is preferred.

これによれば、第２の転炉や第３の転炉の寿命（炉修）に合わせて、効率よく第１の転炉を稼働させることができ、副原料の使用量が増加せず又転炉の耐火物を最大限に有効活用でき、効率よく転炉の操業を行うことができる。
本発明の他の手段は、上流側から下流側に向けて順に並べられた３基の転炉と、前記転炉に上流側から溶湯を搬送する溶湯クレーンと、転炉に下流側からスクラップを搬送するスクラップクレーンとを有する転炉設備において、最上流に配置された第１の転炉は脱りん炉と、最下流に配置された第３の転炉は脱炭炉と、第１の転炉と第３の転炉との間に配置され、脱りん処理又は脱炭処理を行う兼用炉である第２の転炉と、前記第１の転炉で行っていた脱りん処理または前記第３の転炉で行っていた脱炭処理を第２の転炉に切り替える手段と、を備える点にある。 According to this, the first converter can be operated efficiently in accordance with the life (furnace repair) of the second converter or the third converter, and the usage amount of the auxiliary material does not increase. The refractory of the converter can be used to the maximum extent and the converter can be operated efficiently.
Another means of the present invention includes three converters arranged in order from the upstream side to the downstream side, a molten metal crane that conveys the molten metal from the upstream side to the converter, and scrap from the downstream side to the converter. in converter equipment and a scrap cranes for transporting a first converter that is arranged on the most upstream and dephosphorization furnace, a third converter unit located closest to the downstream and Datsusumiro, first rolling it is disposed between the furnace and the third converter, a second converter which is combined furnace for performing dephosphorization treatment or decarburization, dephosphorization process or the second has been performed by the first converter And means for switching the decarburization process performed in the converter 3 to the second converter .

これによれば、溶銑装入側に近い転炉を脱りん炉とし、スクラップ装入側に近い転炉を脱炭炉とすることによって、溶銑やスクラップの物流をスムーズにすることができ、脱りん工程や脱炭工程を含めた全体のサイクルタイムを延長することなく、溶湯クレーンとスクラップクレーンとの干渉を防止することができる。
これに加え、兼用炉によって、脱りん炉が炉修であるときは兼用炉で脱りん処理を行い、脱炭炉が炉修であるときは兼用炉で脱炭処理を行うことが可能となる。
これによって、脱りん処理と脱炭処理とを連続的に行うことができると共に、副原料の使用量が増加せず又転炉の耐火物を最大限に有効活用でき、効率よく転炉の操業を行うことができる。 According to this, by using a converter near the hot metal charging side as a dephosphorization furnace and a converter near the scrap charging side as a decarburization furnace, the distribution of hot metal and scrap can be made smooth. Interference between the molten metal crane and the scrap crane can be prevented without extending the overall cycle time including the phosphorus process and the decarburization process.
In addition to this, when the dephosphorization furnace is repaired, the dual-purpose furnace can perform dephosphorization processing in the dual-purpose furnace, and when the decarburization furnace is repaired, it can be decarburized in the dual-purpose furnace. .
As a result, dephosphorization and decarburization can be carried out continuously, the amount of secondary materials used is not increased, and the refractory of the converter can be utilized to the maximum extent, allowing efficient operation of the converter. It can be performed.

本発明によれば、溶銑やスクラップの物流をスムーズにすることができ、脱りん工程や脱炭工程を含めた全体のサイクルタイムを延長することなく、溶湯クレーンとスクラップクレーンとの干渉を防止することができると共に、効率よく転炉の操業を行うことができる。   According to the present invention, it is possible to smoothly distribute hot metal and scrap, and to prevent interference between the molten metal crane and the scrap crane without extending the entire cycle time including the dephosphorization process and the decarburization process. In addition, the converter can be operated efficiently.

本発明の転炉設備について説明する。
図１，２に示すように、転炉設備１は、複数の転炉２と、これらの転炉２に溶銑を供給するための取鍋３と、取鍋３を転炉２に搬送するため複数（例えば、２台）の溶湯クレーン４Ａ，４Ｂを備えている。また、実施形態の転炉設備１は、溶銑脱硫設備５と、スクラップ装入設備６とを備えたもので、高炉設備から搬送された溶銑を溶銑脱硫設備５で脱硫処理をした後に当該溶銑とスクラップとを転炉に投入して脱りん処理及び脱炭処理を行うものである。 The converter equipment of the present invention will be described.
As shown in FIGS. 1 and 2, the converter equipment 1 includes a plurality of converters 2, a ladle 3 for supplying hot metal to the converters 2, and a ladle 3 for conveying the ladle 3 to the converter 2. A plurality of (for example, two) molten metal cranes 4A and 4B are provided. Moreover, the converter equipment 1 of embodiment is equipped with the hot metal desulfurization equipment 5 and the scrap charging equipment 6, and after desulfurizing the hot metal conveyed from the blast furnace equipment with the hot metal desulfurization equipment 5, Scrap is put into a converter to perform dephosphorization and decarburization.

溶湯クレーン４Ａ，４Ｂは直線状に延びる走行レール７上を走行するもので、この実施の形態では２基の溶湯クレーン４Ａ，４Ｂが１本の走行レール７上を走行するものとなっている。走行レール７に沿って、溶銑脱硫設備５，転炉２，スクラップ装入設備６が順に配置されている。
転炉２は、溶銑脱硫設備５側（上流側）からスクラップ装入設備６側（下流側）に向けて順に３基並べられている。本発明の転炉設備１では、３基の転炉２において、最上流（溶銑脱硫設備５側）に配置された第１の転炉２Ａは脱りん処理を専用とする脱りん炉とされ、最下流（スクラップ装入設備６側）に配置された第３の転炉２Ｃは脱炭処理を専用とする脱炭炉とされ、第１の転炉２Ａと第３の転炉２Ｃとの間に配置された第２の転炉２Ｂは必要に応じて脱りん処理又は脱炭処理を行う兼用炉とされている。第１の転炉２Ａ、第２の転炉２Ｂ、第３の転炉２Ｃは、走行レール７に沿って順に並べられている。 The molten metal cranes 4A and 4B travel on a linearly extending traveling rail 7, and in this embodiment, the two molten cranes 4A and 4B travel on a single traveling rail 7. Along the traveling rail 7, a hot metal desulfurization facility 5, a converter 2, and a scrap charging facility 6 are arranged in order.
Three converters 2 are arranged in order from the hot metal desulfurization equipment 5 side (upstream side) to the scrap charging equipment 6 side (downstream side). In the converter facility 1 of the present invention, in the three converters 2, the first converter 2 </ b> A arranged in the uppermost stream (on the hot metal desulfurization facility 5 side) is a dephosphorization furnace dedicated to dephosphorization treatment, The 3rd converter 2C arrange | positioned in the most downstream (scrap charging equipment 6 side) is made into the decarburization furnace only for a decarburization process, and is between 1st converter 2A and 3rd converter 2C. The second converter 2 </ b> B arranged in is used as a dual-purpose furnace that performs a dephosphorization process or a decarburization process as necessary. The first converter 2 </ b> A, the second converter 2 </ b> B, and the third converter 2 </ b> C are arranged in order along the traveling rail 7.

各転炉の出湯側にはレールから構成される軌道１９が敷設されていて、軌道１９上に台車２０Ａ，２０Ｂが走行するようになっている。なお、脱りん炉２Ａ及び兼用炉２Ｂに敷設された軌道は、第１の転炉２Ａの下を通過して溶湯クレーン４Ａ，４Ｂが走行する走行レール７上まで延長されている。
溶銑脱硫設備５は、２つの脱硫処理ステーション８Ａ，８Ｂを有したもので、各脱硫処理ステーション８Ａ，８Ｂは互いに並列して配備されている。各脱硫処理ステーション８Ａ，８Ｂは、溶銑を取鍋３に払い出す払い出しピット９と、溶銑に脱硫処理を施す脱硫装置１０と、溶銑のスラグを除去する除滓装置１１（スラグドラッガー）とを備えている。 A track 19 composed of rails is laid on the tapping side of each converter, and carts 20A and 20B travel on the track 19. The track laid in the dephosphorization furnace 2A and the combined furnace 2B is extended to the top of the traveling rail 7 through which the molten metal cranes 4A and 4B travel under the first converter 2A.
The hot metal desulfurization equipment 5 has two desulfurization treatment stations 8A and 8B, and the desulfurization treatment stations 8A and 8B are arranged in parallel with each other. Each of the desulfurization treatment stations 8A and 8B includes a pay-out pit 9 for discharging hot metal to the ladle 3, a desulfurization device 10 for performing desulfurization treatment on the hot metal, and a demolition device 11 (slag dragger) for removing hot metal slag. ing.

スクラップ装入設備６は、転炉２にスクラップを装入するもので、スクラップを積み込むスクラップシュート１２と、スクラップシュート１２を搬送するスクラップクレーン１３と、走行レール７下にスクラップシュート１２を載置するためのステージ１４と、スクラップを受け入れるスクラップヤード１５とを備えている。
ステージ１４とスクラップヤード１５との間には１又は複数本のスクラップ搬送レール１６が敷設されており、該スクラップ搬送レール１６には、スクラップシュート１２を載置可能な搬送台車１７が移動自在に配備されている。各スクラップ搬送レール１６には、搬送台車１７をステージ１４上に停車させるシュートステーション１８が配備されており、該シュートステーション１８に搬送台車１７を停車させることにより、スクラップシュート１２が走行レール７下に位置することとなる。 The scrap charging equipment 6 is for charging scrap into the converter 2. The scrap chute 12 for loading the scrap, the scrap crane 13 for conveying the scrap chute 12, and the scrap chute 12 are placed under the traveling rail 7. A stage 14 and a scrap yard 15 for receiving scrap.
One or a plurality of scrap conveyance rails 16 are laid between the stage 14 and the scrap yard 15, and a conveyance carriage 17 on which the scrap chute 12 can be placed is movably arranged on the scrap conveyance rails 16. Has been. Each scrap transport rail 16 is provided with a chute station 18 for stopping the transport cart 17 on the stage 14. By stopping the transport cart 17 on the chute station 18, the scrap chute 12 is placed under the travel rail 7. Will be located.

転炉設備１は、以上の構成からなるものであるが、次に、走行レール７に対する設備の配置を説明する。説明の便宜上、走行レール７を各クレーン１基を収容可能な互いに等しい幅を有する８つの区間（０区〜７区）とスクラップ部４のステージ１４上の区間（Ｓ区）に区切り、７区〜Ｓ区までの区間は省略する。
溶湯クレーン４Ａは、走行レール７上を０区から６区まで移動可能であり、溶湯クレーン４Ｂは、走行レール７上を１区から７区まで移動可能である。
スクラップクレーン１３は、走行レール７上を４区からＳ区まで移動可能である。また、１区に脱硫処理ステーション８Ａが配置されると共に、２区に脱硫処理ステーション８Ｂが配置されている。これら脱硫処理ステーション８Ａ，８Ｂは、走行レール７下に払出しピット９を配置している。また、４区、５区、６区に対応する位置には、第１の転炉２Ａ，第２の転炉２Ｂ，第３の転炉２Ｃがそれぞれ順に配置されている。 Although the converter equipment 1 consists of the above structure, arrangement | positioning of the equipment with respect to the traveling rail 7 is demonstrated next. For convenience of explanation, the traveling rail 7 is divided into 8 sections (0 to 7 sections) having the same width and capable of accommodating one crane and a section (S section) on the stage 14 of the scrap section 4. The section to ~ S ward is omitted.
The molten metal crane 4A is movable on the traveling rail 7 from the 0th ward to the sixth ward, and the molten metal crane 4B is movable on the traveling rail 7 from the first ward to the seventh ward.
The scrap crane 13 is movable on the traveling rail 7 from the 4th ward to the Sth ward. Further, a desulfurization treatment station 8A is disposed in the first section, and a desulfurization treatment station 8B is disposed in the second section. In these desulfurization treatment stations 8A and 8B, a payout pit 9 is disposed under the traveling rail 7. Moreover, the 1st converter 2A, the 2nd converter 2B, and the 3rd converter 2C are each arrange | positioned in order at the position corresponding to 4 wards, 5 wards, and 6 wards.

本発明の転炉設備の操業方法について説明する。
この転炉設備１の操業方法では、第１の転炉２Ａを脱りん炉として採用し、第３の転炉２Ｃを脱炭炉として採用し、第２の転炉２Ｂを脱りん処理又は脱炭処理を行う兼用炉とし、その上で、脱りん処理又は脱炭処理を行うようにしている。
基本的には、第１の転炉２Ａで脱りん処理を行うと共に、第３の転炉２Ｃで脱炭処理を行うこととしている。第１の転炉２Ａが寿命を迎え転炉内の耐火物等を修復又は交換するという炉修作業が発生した場合には、第１の転炉２Ａを一時的に休止した後に炉修を行うと共に、第１の転炉２Ａの代わりに第２の転炉２Ｂで脱りん処理を行うこととしている。 The operation method of the converter equipment of this invention is demonstrated.
In the operation method of the converter facility 1, the first converter 2A is employed as a dephosphorization furnace, the third converter 2C is employed as a decarburization furnace, and the second converter 2B is dephosphorized or removed. A dual-purpose furnace that performs charcoal treatment is used, and then dephosphorization or decarburization is performed.
Basically, dephosphorization processing is performed in the first converter 2A and decarburization processing is performed in the third converter 2C. When the first converter 2A reaches the end of its life and repairs or replaces the refractory in the converter, the furnace repair is performed after the first converter 2A is temporarily stopped. At the same time, dephosphorization is performed in the second converter 2B instead of the first converter 2A.

また、第３の転炉２Ｃが寿命を迎え転炉内の耐火物等を修復又は交換するという炉修作業が発生した場合には、第３の転炉２Ｃを一時的に休止した後に炉修を行うと共に、第３の転炉２Ｃの代わりに第２の転炉２Ｂで脱炭処理を行うこととしている。即ち、転炉設備１の操業方法では、常に２基の転炉を稼働させて脱りん処理及び脱炭処理を行い、他の１基の転炉を炉修するようにしている。
以下、第１の転炉２Ａから第２の転炉２Ｂへ脱りん処理を切り替えることについて図３を用いて詳しく説明すると共に、転炉２Ｂから第２の転炉２Ａへ脱りん処理を戻すことについて図４を用いて詳しく説明する。 In addition, in the case where a furnace repair work is performed in which the third converter 2C reaches the end of its life and repairs or replaces the refractories in the converter, the furnace repair is performed after the third converter 2C is temporarily stopped. The decarburization process is performed in the second converter 2B instead of the third converter 2C. In other words, in the operation method of the converter facility 1, two converters are always operated to perform dephosphorization and decarburization, and the other one converter is repaired.
Hereinafter, switching the dephosphorization process from the first converter 2A to the second converter 2B will be described in detail with reference to FIG. 3, and the dephosphorization process is returned from the converter 2B to the second converter 2A. Will be described in detail with reference to FIG.

図３，４では、第１の転炉２Ａ（１転炉），第２の転炉２Ｂ（２転炉），第３の転炉２Ｃ（３転炉）における処理を時系列で示している。また、脱りん処理は、転炉への溶銑装入、脱りん吹錬、調質、出湯、排滓の１チャージ分の処理が複数回含まれている。脱炭処理は、転炉への溶銑装入、脱炭吹錬、調質、出湯、排滓の１チャージ分の処理が複数回含まれている。
図３に示すように、第１の転炉２Ａを稼働した後に一時的に休止するタイミングは、過去の操業実績などから第１の転炉２Ａの予想寿命（転炉２内の耐火物を修復又は交換しなければならない期間）を予め求め、第１の転炉２Ａが予想寿命になる時間（時刻）とする。 第１の転炉２Ａの寿命は、過去の実績から大凡４０００〜５０００チャージとされており、このチャージ数を予想寿命とするのが好ましい。また、操業の途中（例えば、２０００チャージ）で、耐火物の厚み（残厚）をレーザープロフィールメータ等で測定し、測定した耐火物の厚みから第１の転炉２Ａの寿命を予測してもよい。 3 and 4, the processes in the first converter 2A (one converter), the second converter 2B (two converters), and the third converter 2C (three converters) are shown in time series. . In addition, the dephosphorization process includes a plurality of processes for one charge of hot metal charging to the converter, dephosphorization blowing, tempering, tapping, and exhausting. The decarburization process includes a plurality of processes for one charge of hot metal charging to the converter, decarburization blowing, tempering, tapping, and exhausting.
As shown in FIG. 3, the timing to temporarily stop after operating the first converter 2 </ b> A is the expected life of the first converter 2 </ b> A based on the past operation results (restoring the refractory in the converter 2). Or a period during which the first converter 2A is expected to have a life (time). The lifetime of the first converter 2A is approximately 4000 to 5000 charges based on past results, and this number of charges is preferably set as the expected lifetime. Further, even if the thickness of the refractory (remaining thickness) is measured with a laser profile meter or the like during the operation (for example, 2000 charge), and the lifetime of the first converter 2A is predicted from the measured thickness of the refractory. Good.

なお、第１の転炉２Ａにおいて、操業初期や操業中期では５００チャージ毎に、操業末期では３００チャージ毎に耐火物の厚み（残厚）を当該転炉２の全体に亘って測定するのが好ましい。
そして、本発明の操業方法では、第１の転炉２Ａが予想寿命になる時間、即ち、第１の転炉２Ａの予想寿命がきた時点での第２の転炉２Ｂの操業状態（稼働状態）を予め想定し、それぞれの状況に応じて、第２の転炉２Ｂの操業を変更するようにしている。
即ち、図３のパターン１に示すように、
（ｉ）第１の転炉２Ａの予想寿命がきた時点（Ｐ１）で第２の転炉２Ｂがスタンバイ状態（第２の転炉２Ｂが炉修が終わり、いつでも稼働できる状態）であると想定される際（Ｐ２）には、実際に第１の転炉２Ａの予想寿命がきた時点（Ｐ３）で第１の転炉２Ａでの脱りん処理を第２の転炉２Ｂに切り替えるようにしている（Ｐ４）。なお、第２の転炉２Ｂで炉修が開始された時点で、第３の転炉２Ｃを稼働させて脱炭処理を開始するようにしている。 In the first converter 2A, the thickness of the refractory (remaining thickness) is measured over the entire converter 2 at every 500 charges in the initial operation period and during the operation period and every 300 charges at the end of the operation. preferable.
In the operation method of the present invention, the operation time (operation state) of the second converter 2B at the time when the first converter 2A reaches the expected life, that is, when the expected life of the first converter 2A is reached. ) Is assumed in advance, and the operation of the second converter 2B is changed according to each situation.
That is, as shown in pattern 1 of FIG.
(I) It is assumed that the second converter 2B is in a standby state (a state in which the second converter 2B has been repaired and can be operated at any time) when the expected life of the first converter 2A is reached (P1). When (P2) is performed, the dephosphorization process in the first converter 2A is switched to the second converter 2B when the expected life of the first converter 2A actually reaches (P3). (P4). In addition, when the furnace repair is started in the second converter 2B, the third converter 2C is operated to start the decarburization process.

図３のパターン２に示すように、
（ii）第１の転炉２Ａの予想寿命がきた時点（Ｐ５）で第２の転炉２Ｂが炉修中であると想定される際（Ｐ６）には、第２の転炉２Ｂにおける炉修の開始の時期を早め（Ｐ７）、実際に第１の転炉２Ａの予想寿命がくる時点（Ｐ８）までに炉修を終了させてから脱りん処理を第２の転炉２Ｂに切り替える（Ｐ９）。なお、第２の転炉２Ｂで炉修の開始を早めた場合、第２の転炉２Ｂで炉修を開始した時点で第３の転炉２Ｃでは脱炭処理を行うようにしている。 As shown in pattern 2 of FIG.
(Ii) When it is assumed that the second converter 2B is being repaired at the time (P5) when the expected life of the first converter 2A is reached (P6), the furnace in the second converter 2B The repair start time is advanced (P7), and the dephosphorization process is switched to the second converter 2B after the furnace repair is completed by the time point (P8) when the expected life of the first converter 2A actually reaches (P8) ( P9). In addition, when the start of the furnace repair is advanced in the second converter 2B, the decarburization process is performed in the third converter 2C when the furnace repair is started in the second converter 2B.

図３のパターン３に示すように、
（iii）第１の転炉２Ａの予想寿命がきた時点（Ｐ１０）で第２の転炉２Ｂが脱炭処理中であると想定される際（Ｐ１１）には、実際に第１の転炉２Ａの予想寿命がきた時点（Ｐ１２）で第２の転炉２Ｂの脱炭処理を終了してから脱りん処理を第２の転炉２Ｂに切り替える（Ｐ１３）。なお、第２の転炉２Ｂで脱炭処理から脱りん処理に切り替えた時点で第３の転炉２Ｃを稼働させて脱炭処理を行うようにしている。
図４に示すように、第１の転炉２Ａが一時的に休止しているとき（スタンバイ状態を含む）は、第２の転炉２Ｂで脱りん処理を行い、第３の転炉２Ｃで脱炭処理を行っている状態である。 As shown in pattern 3 of FIG.
(Iii) When it is assumed that the second converter 2B is being decarburized at the time when the expected life of the first converter 2A has reached (P10) (P11), the first converter is actually The dephosphorization process is switched to the second converter 2B after the decarburization process of the second converter 2B is completed at the point of time when the expected life of 2A is reached (P12) (P13). Note that when the second converter 2B is switched from the decarburization process to the dephosphorization process, the third converter 2C is operated to perform the decarburization process.
As shown in FIG. 4, when the first converter 2A is temporarily suspended (including the standby state), dephosphorization processing is performed in the second converter 2B, and in the third converter 2C. The decarburization process is in progress.

第２の転炉２Ｂを稼働した後に第２の転炉２Ｂを一時的に休止するタイミングは、過去の操業実績などから第２の転炉２Ｂの予想寿命を予め求め、第２の転炉２Ｂが予想寿命になる時間（時刻）とする。なお、第２の転炉２Ｂを一時的に休止した後炉修を行う。
また、第３の転炉２Ｃを稼働した後に第３の転炉２Ｃを一時的に休止するタイミングは、過去の操業実績などから第３の転炉２Ｃの予想寿命を予め求め、第３の転炉２Ｃが予想寿命になる時間（時刻）とする。なお、第３の転炉２Ｃを一時的に休止した後には炉修を行う。 The timing for temporarily stopping the second converter 2B after operating the second converter 2B is obtained in advance by calculating the expected life of the second converter 2B from the past operation results, etc. Is the time (time) when the expected life is reached. The furnace repair is performed after the second converter 2B is temporarily stopped.
In addition, the timing for temporarily suspending the third converter 2C after operating the third converter 2C is obtained by previously obtaining the expected life of the third converter 2C from the past operation results and the like. The time (time) at which the furnace 2C reaches the expected life. The furnace repair is performed after temporarily suspending the third converter 2C.

第２の転炉２Ｂ及び第３の転炉２Ｃの寿命は、過去の実績から大凡４０００〜５０００チャージとされており、このチャージ数を予想寿命とするのが好ましい。また、操業の途中（例えば、２０００チャージ）で、耐火物の厚み（残厚）をレーザープロフィールメータ等で測定し、測定した耐火物の厚みから第２の転炉２Ｂ及び第３の転炉２Ｃの寿命を予測してもよい。
なお、第２の転炉２Ｂ及び第３の転炉２Ｃにおいて、操業初期や操業中期では５００チャージ毎に、操業末期では３００チャージ毎に耐火物の厚み（残厚）を当該転炉２の全体に亘って測定するのが好ましい。 The lifetimes of the second converter 2B and the third converter 2C are approximately 4000 to 5000 charges based on past results, and it is preferable that the number of charges be the expected lifetime. Further, during the operation (for example, 2000 charge), the thickness (remaining thickness) of the refractory is measured with a laser profile meter or the like, and the second converter 2B and the third converter 2C are determined from the measured thickness of the refractory. You may predict the lifetime of
In the second converter 2B and the third converter 2C, the thickness of the refractory (remaining thickness) is set to the whole of the converter 2 at every 500 charges in the initial operation and the intermediate operation and every 300 charges at the end of the operation. It is preferable to measure over the range.

本発明の操業方法では、第２の転炉２Ｂや第３の転炉２Ｃの操業状態（稼働状態）を予め想定し、それぞれの状況に応じて、第１の転炉２Ａの操業を開始するタイミングを決定している。
例えば、図４のパターン４の想定に示すように、第３の転炉２Ｃが脱炭処理を終了して炉修を開始する前に、第２の転炉２Ｂが寿命を迎え、第２の転炉２Ｂの炉修が第３の転炉２Ｃの炉修よりも早く開始され（Ｐ２０）且つ第２の転炉２Ｂの炉修期間と第３の転炉２Ｃの炉修期間とは重複していない状態であるときは、パターン４の稼働方法に示すように、第２の転炉２Ｂの炉修が開始された時点（Ｐ２１）で第１の転炉２Ａの操業（脱りん処理）を開始する。なお、第３の転炉２Ｃが炉修を開始した時点で第２の転炉２Ｂでは脱炭処理を行う。 In the operation method of the present invention, the operation state (operating state) of the second converter 2B and the third converter 2C is assumed in advance, and the operation of the first converter 2A is started according to each situation. The timing is determined.
For example, as shown in the assumption of pattern 4 in FIG. 4, before the third converter 2C finishes the decarburization process and starts the furnace repair, the second converter 2B reaches the end of its life, The repair of the converter 2B is started earlier than the repair of the third converter 2C (P20), and the repair period of the second converter 2B overlaps the repair period of the third converter 2C. If not, the operation (dephosphorization treatment) of the first converter 2A is performed at the time when the furnace repair of the second converter 2B is started (P21) as shown in the operation method of the pattern 4. Start. Note that the decarburization process is performed in the second converter 2B when the third converter 2C starts the furnace repair.

パターン５の想定に示すように、第２の転炉２Ｂが脱りん処理を終了して炉修を開始する前に、第３の転炉２Ｃが寿命を迎え、第３の転炉２Ｃの炉修が第２の転炉２Ｂの炉修よりも早く開始され（Ｐ２２）且つ第３の転炉２Ｃの炉修期間と第２の転炉２Ｂの炉修期間とは重複していない状態であるときは、パターン５の稼働方法に示すように、第３の転炉２Ｃの炉修が開始された時点（Ｐ２３）で第１の転炉２Ａの操業（脱りん処理）を開始する。その際、第３の転炉２Ｃで行っていた脱炭処理は、第２の転炉２Ｂで行うようにする。 パターン４とパターン５とをまとめると、
（ｉｖ）第２の転炉２Ｂと第３の転炉２Ｃとの炉修期間が重複せず且つ第２の転炉２Ｂ又は第３の転炉２Ｃのいずれか一方が他方よりも予想寿命が早くくると想定される際には、一方の転炉が実際に予想寿命に達した時点で脱りん処理を第１の転炉２Ａに切り替えるようにしている。 As shown in the assumption of pattern 5, before the second converter 2B finishes the dephosphorization process and starts repairing, the third converter 2C reaches the end of its life, and the furnace of the third converter 2C The repair is started earlier than the repair of the second converter 2B (P22), and the repair period of the third converter 2C and the repair period of the second converter 2B are not overlapped. When the operation of the third converter 2C is started (P23), the operation (dephosphorization process) of the first converter 2A is started as shown in the operation method of the pattern 5. At that time, the decarburization process performed in the third converter 2C is performed in the second converter 2B. When pattern 4 and pattern 5 are put together,
(Iv) The furnace repair periods of the second converter 2B and the third converter 2C do not overlap, and either the second converter 2B or the third converter 2C has an expected life longer than the other. When it is assumed that it will come soon, the dephosphorization process is switched to the first converter 2A when one converter actually reaches the expected life.

さらに、パターン６に示すように、第２の転炉２Ｂと第３の転炉２Ｃとの炉修期間が重複する場合には、第３の転炉２Ｃにおける炉修の開始時期を早め（Ｐ２４）、第２の転炉２Ｂの予想寿命がきた時点（Ｐ２５）までに第３の転炉２Ｃの炉修を終了させるようにすると共に、第３の転炉２Ｃの炉修を開始した時点（Ｐ２６）で脱りん処理を第１の転炉２Ａに切り替える。
なお、第２の転炉２Ｂと第３の転炉２Ｃとの炉修期間が重複する場合には、パターン７に示すように、第２の転炉２Ｂにおける操業と第３の転炉２Ｃにおける操業とを逆にして、第２の転炉２Ｂにおける炉修を早め、第３の転炉２Ｃの予想寿命がきた時点までに第２の転炉２Ｂの炉修を終了させるようにすると共に、第２の転炉２Ｂの炉修を開始した時点で脱りん処理を第１の転炉２Ａに切り替えるようにしてもよい。 Further, as shown in pattern 6, when the furnace repair periods of the second converter 2B and the third converter 2C overlap, the start timing of the furnace repair in the third converter 2C is advanced (P24 ), The repair of the third converter 2C is completed by the time point (P25) when the expected life of the second converter 2B is reached (P25), and the repair of the third converter 2C is started ( In P26), the dephosphorization process is switched to the first converter 2A.
In addition, when the furnace repair period of the 2nd converter 2B and the 3rd converter 2C overlaps, as shown in the pattern 7, the operation in the 2nd converter 2B and the 3rd converter 2C Reversing the operation, the furnace repair in the second converter 2B is accelerated, and the repair of the second converter 2B is completed by the time when the expected life of the third converter 2C is reached, The dephosphorization process may be switched to the first converter 2A when the repair of the second converter 2B is started.

即ち、（ｖ）第２の転炉２Ｂと第３の転炉２Ｃとの炉修期間が重複し且つ第２の転炉２Ｂ又は第３の転炉２Ｃのいずれか一方が他方よりも予想寿命が早くくると想定される際には、一方の転炉における炉修の開始を早め、実際に一方の転炉の予想寿命がきた時点までに炉修を終了させてから脱りん処理を第１の転炉２Ａに切り替えるようにするのがよい。
このように、第２転炉２Ｂを兼用炉とすることで、第１の転炉２Ａや第３の転炉２Ｃが寿命を迎えて炉修中により一時的に休止した状態であっても、当該兼用炉で脱りん処理や脱炭処理を行うことができ、転炉設備１での操業において、脱りん処理や脱炭処理が途切れることなく行うことができる。 That is, (v) the furnace repair periods of the second converter 2B and the third converter 2C overlap, and either the second converter 2B or the third converter 2C has an expected life longer than the other. Is expected to come sooner, the start of the furnace repair in one converter is advanced, and after the end of the furnace repair by the time when the expected life of one converter is actually reached, the first dephosphorization treatment is performed. It is better to switch to the converter 2A.
Thus, by using the second converter 2B as a dual-purpose furnace, even if the first converter 2A or the third converter 2C reaches the end of its life and is temporarily suspended during the furnace repair, The dephosphorization process and the decarburization process can be performed in the combined furnace, and the dephosphorization process and the decarburization process can be performed without interruption in the operation in the converter facility 1.

図５（ａ）は、最上流に配置された第１の転炉２Ａを脱りん炉として採用し、最下流に配置された第３の転炉２Ｃを脱炭炉として採用した場合の操業方法を示した実施例のガントチャートである。
まず、転炉設備１の操業方法では、高炉から来た混銑車２２が転炉設備１に到着し、混銑車２２から払い出しピット９内の取鍋３に溶銑が払い出されると、脱硫装置１０で溶銑が脱硫処理された後、除滓装置１１で溶銑のスラグが除去される。
溶銑のスラグが除去されると取鍋３は、溶湯クレーン４Ａで吊り上げられて脱りんを行う第１の転炉２Ａへ向けて搬送されることとなる（＃１）。 FIG. 5 (a) shows an operation method in which the first converter 2A arranged at the uppermost stream is adopted as the dephosphorization furnace and the third converter 2C arranged at the most downstream is adopted as the decarburization furnace. It is the Gantt chart of the Example which showed.
First, in the operation method of the converter 1, when the kneading vehicle 22 coming from the blast furnace arrives at the converter 1 and the molten iron is discharged from the kneading vehicle 22 to the ladle 3 in the pit 9, After the hot metal is desulfurized, the hot metal slag is removed by the hot metal removal device 11.
When the molten iron slag is removed, the ladle 3 is lifted by the molten metal crane 4A and transported toward the first converter 2A where dephosphorization is performed (# 1).

溶湯クレーン４Ａが第１の転炉２Ａに向かう前に、スクラップクレーン１３がスクラップシュート１２を吊り上げて第１の転炉２Ａへ向かい、第１の転炉２Ａに溶銑が装入される前に、第１の転炉２Ａにスクラップを装入する（＃２）。
スクラップクレーン１３が第１の転炉２Ａにスクラップを装入した後、スクラップクレーン１３はスクラップヤード１５に戻る。その後、溶湯クレーン４Ａが第１の転炉２Ａの前まで移動して取鍋３内の溶銑を第１の転炉２Ａに装入する（＃３）。
溶湯クレーン４Ａが溶銑を第１の転炉２Ａに装入する際、溶湯クレーン４Ｂは第１の転炉２Ａよりも下流側（例えば５区）に退避しており、溶湯クレーン４Ａと溶湯クレーン４Ｂとは干渉しないようになっている。 Before the molten crane 4A goes to the first converter 2A, the scrap crane 13 lifts the scrap chute 12 and goes to the first converter 2A, and before the molten iron is charged into the first converter 2A, The scrap is charged into the first converter 2A (# 2).
After the scrap crane 13 loads the scrap into the first converter 2 </ b> A, the scrap crane 13 returns to the scrap yard 15. Thereafter, the molten metal crane 4A moves to the front of the first converter 2A, and the molten iron in the ladle 3 is charged into the first converter 2A (# 3).
When the molten metal crane 4A charges the molten iron into the first converter 2A, the molten metal crane 4B is retracted to the downstream side (for example, 5 wards) from the first converter 2A, and the molten metal crane 4A and the molten metal crane 4B. And will not interfere.

第１の転炉２Ａに溶銑を装入した後、溶湯クレーン４Ａは払い出しピット９側に移動し、溶湯クレーン４Ｂは、脱りん処理が終了した溶銑が入った取鍋３を吊り上げて（＃４）、第３の転炉２Ｃに搬送し、溶銑を第３の転炉２Ｃに装入する（＃５）。
溶銑を第３の転炉２Ｃに装入する前には、スクラップクレーン１３はスクラップヤード１５でスクラップを吊り上げた後、第３の転炉２Ｃの前に移動して当該第３の転炉２Ｃにスクラップを装入する（＃６）。
このとき、溶湯クレーン４Ｂは、第３の転炉２Ｃよりも上流側から第３の転炉２Ｃに向けて移動しており、溶湯クレーン４Ｂとスクラップクレーン１３とは干渉することがない。以上の流れが繰り返される。 After the molten iron is charged into the first converter 2A, the molten metal crane 4A moves to the payout pit 9 side, and the molten metal crane 4B lifts the ladle 3 containing the molten iron after dephosphorization (# 4). ), Conveyed to the third converter 2C, and the molten iron is charged into the third converter 2C (# 5).
Before charging the hot metal into the third converter 2C, the scrap crane 13 lifts the scrap at the scrap yard 15 and then moves in front of the third converter 2C to move to the third converter 2C. The scrap is charged (# 6).
At this time, the molten metal crane 4B is moving from the upstream side of the third converter 2C toward the third converter 2C, and the molten metal crane 4B and the scrap crane 13 do not interfere with each other. The above flow is repeated.

このように、溶銑装入側（最上流側）の第１の転炉２Ａを脱りん処理を行う脱りん炉とし、スクラップヤード１５側（最下流側）の第３の転炉２Ｃを脱炭を行う脱炭炉とすることによって、上流側から脱りん処理，脱炭処理の順に処理を行う流れになると共に、脱炭処理の際は下流側から第３の転炉２Ｃにスクラップを装入する流れとなるため、溶銑及びスクラップの物流（流れ）はスムーズとなり、溶銑を搬送する溶湯クレーン４Ｂとスクラップをスクラップクレーン１３とが干渉することはない。
一方で、図５（ｂ）の比較例に示すように、脱りんを行う転炉と脱炭を行う転炉とを逆にした場合、即ち、溶銑装入側（最上流側）の第１の転炉２Ａを脱炭処理を行う脱炭炉とし、スクラップヤード１５側（最下流側）の第３の転炉２Ｃを脱りんを行う脱りん炉とした場合を考える。比較例では、脱りん処理と脱炭処理との流れはそのまま（脱炭時間や脱りん時間等を同じ）である。 In this way, the first converter 2A on the hot metal charging side (uppermost stream side) is used as a dephosphorization furnace for performing dephosphorization, and the third converter 2C on the scrap yard 15 side (most downstream side) is decarburized. By using the decarburization furnace that performs the decarburization process, the dephosphorization process and decarburization process are performed in this order from the upstream side, and at the time of the decarburization process, scrap is charged into the third converter 2C from the downstream side Therefore, the molten metal and scrap logistics (flow) are smooth, and the molten metal crane 4B for conveying the molten iron and the scrap crane 13 do not interfere with the scrap.
On the other hand, as shown in the comparative example of FIG. 5B, when the converter for dephosphorization and the converter for decarburization are reversed, that is, the first on the hot metal charging side (the most upstream side). Let us consider a case where the converter 2A is a decarburizing furnace that performs a decarburizing process, and the third converter 2C on the scrap yard 15 side (the most downstream side) is a dephosphorizing furnace that performs dephosphorization. In the comparative example, the flow of the dephosphorization process and the decarburization process remains the same (the decarburization time and the dephosphorization time are the same).

スクラップクレーン１３がスクラップシュート１２を吊り上げて第３の転炉２Ｃへ向かい、第３の転炉２Ｃに溶銑が装入される前に、第３の転炉２Ｃにスクラップを装入する（＃１０）。このとき、溶湯クレーン４Ｂはスクラップクレーン１３と干渉しないように第３の転炉２Ｃよりも上流側（例えば、５区）に退避させることができる。
溶湯クレーン４Ａは、混銑車２２から払い出され除滓装置１１で溶銑のスラグが除去された溶銑が入った取鍋３を第３の転炉２Ｃに搬送して溶銑を第３の転炉２Ｃに装入する（＃１１）。このとき、溶湯クレーン４Ｂは、溶湯クレーン４Ａとの干渉を避けるために、第３の転炉２Ｃよりも下流側（例えば、７区）に退避することになるが、溶湯クレーン４Ａが第３の転炉２Ｃに溶銑を装入した後、第３の転炉２Ｃ前まで移動し、脱りん処理が終了した溶銑が入った取鍋３を吊り上げ（＃１２）、当該取鍋３を第１の転炉２Ａに搬送することになる（＃１３）。 The scrap crane 13 lifts the scrap chute 12 toward the third converter 2C, and before the molten iron is charged into the third converter 2C, the scrap is charged into the third converter 2C (# 10). ). At this time, the molten metal crane 4B can be retreated to the upstream side (for example, 5 wards) from the third converter 2C so as not to interfere with the scrap crane 13.
The molten iron crane 4A conveys the ladle 3 containing the molten iron from which the molten iron slag has been removed by the demolition apparatus 11 to the third converter 2C by feeding the molten iron 4A to the third converter 2C. (# 11). At this time, in order to avoid interference with the molten metal crane 4A, the molten metal crane 4B is retreated to the downstream side (for example, 7 wards) from the third converter 2C. After the molten iron is charged into the converter 2C, the ladle 3 is moved to before the third converter 2C, the ladle 3 containing the molten iron after the dephosphorization process is lifted (# 12), and the ladle 3 is moved to the first It will be conveyed to the converter 2A (# 13).

さて、第１の転炉２Ａが脱炭炉であるために、当該第１の転炉２Ａに脱りんが終了した溶銑を装入する（＃１３）前に、第１の転炉２Ａにスクラップを装入する必要がある。
ここで、脱炭処理のスケジュールを変更することなく溶銑を第１の転炉２Ａに装入すると考えると、スクラップクレーン１３は溶湯クレーン４Ｂを超えて上流側に移動させなければならず（＃１４）、溶湯クレーン４Ｂとスクラップクレーン１３とが干渉するという問題が生じる。即ち、図５（ｂ）に示す比較例のガントチャートでは、溶湯クレーン４Ｂとスクラップクレーン１３とが交差してしまい、両クレーンが干渉することとなる。 Now, since the first converter 2A is a decarburization furnace, the first converter 2A is scrapped before the molten iron after dephosphorization is charged into the first converter 2A (# 13). Need to be charged.
Here, when it is considered that the molten iron is charged into the first converter 2A without changing the decarburization schedule, the scrap crane 13 must be moved upstream of the molten metal crane 4B (# 14). ), The problem that the molten metal crane 4B and the scrap crane 13 interfere with each other arises. That is, in the Gantt chart of the comparative example shown in FIG. 5B, the molten metal crane 4B and the scrap crane 13 cross each other and both cranes interfere with each other.

そこで、図５（ｃ）に示すように、溶湯クレーン４Ｂとスクラップクレーン１３との干渉を回避するためには、第３の転炉２Ｃの前で鍋吊り（＃１５）をした溶湯クレーン４Ｂを第１の転炉２Ａよりも上流側（例えば、３区）に退避（＃１６）した後に、スクラップクレーン１３を第１の転炉２Ａに移動させるようにしなければならない。
溶湯クレーン４Ｂを退避させる時間を確保するために、脱炭処理のスケジュールを変更し、第３の転炉２Ｃの脱炭処理においてスクラップを装入する時期を遅くしなければならない。 Therefore, as shown in FIG. 5 (c), in order to avoid the interference between the molten crane 4B and the scrap crane 13, a molten crane 4B which is pan-hanged (# 15) in front of the third converter 2C is provided. After retreating (# 16) to the upstream side (for example, Section 3) from the first converter 2A, the scrap crane 13 must be moved to the first converter 2A.
In order to secure time for evacuating the molten crane 4B, it is necessary to change the schedule of the decarburization process and delay the time for charging the scrap in the decarburization process of the third converter 2C.

ゆえに、脱炭処理で排滓からスクラップの装入までの時間Ｔが長くなり、全体としての処理時間（サイクルタイム）が長くなるという問題が発生する。
本発明によれば、溶銑装入側に近い転炉を脱りん炉とし、スクラップ装入側に近い転炉を脱炭炉とすることによって、溶銑やスクラップの物流をスムーズにすることができ、脱りん工程や脱炭工程を含めた全体のサイクルタイムを延長することなく、溶湯クレーンとスクラップクレーンとの干渉を防止することができる。
本発明の転炉の操業方法及び転炉設備は、上記の実施の形態に限定されない。 Therefore, in the decarburization process, the time T from exhausting to the charging of the scrap becomes long, and there arises a problem that the processing time (cycle time) as a whole becomes long.
According to the present invention, by using a converter near the hot metal charging side as a dephosphorization furnace and a converter near the scrap charging side as a decarburization furnace, the distribution of hot metal and scrap can be made smooth, Interference between the molten metal crane and the scrap crane can be prevented without extending the overall cycle time including the dephosphorization process and the decarburization process.
The converter operating method and the converter equipment of the present invention are not limited to the above embodiments.

転炉設備の平面図である。It is a top view of converter equipment. 転炉設備の側面図である。It is a side view of converter equipment. 転炉設備の操業方法を示す図である（第１の転炉休止時）。It is a figure which shows the operating method of converter equipment (at the time of the 1st converter stop). 転炉設備の操業方法を示す図である（第１の転炉開始時）。It is a figure which shows the operating method of converter equipment (at the time of the 1st converter start). 実施例と比較例との操業方法におけるガントチャートである。It is a Gantt chart in the operation method of an Example and a comparative example.

符号の説明Explanation of symbols

１ 転炉設備
２ 転炉
２Ａ 第１の転炉（脱りん炉）
２Ｂ 第２の転炉（兼用炉）
２Ｃ 第３の転炉（脱炭炉）
３ 取鍋
４Ａ 溶湯クレーン
４Ｂ 溶湯クレーン
１３ スクラップクレーン 1 Converter 2 Converter 2A First converter (dephosphorization furnace)
2B Second converter (combined furnace)
2C Third converter (decarburization furnace)
3 Ladle 4A Molten Crane 4B Molten Crane 13 Scrap Crane

Claims (4)

上流側から下流側に向けて順に並べられた３基の転炉と、前記転炉に上流側から溶湯を搬送する溶湯クレーンと、転炉に下流側からスクラップを搬送するスクラップクレーンとを有する転炉設備で、脱りん処理及び脱炭処理を行う転炉設備の操業方法において、
最上流に配置された第１の転炉を脱りん炉として採用し、
最下流に配置された第３の転炉を脱炭炉として採用し、
第１の転炉と第３の転炉との間に配置された第２の転炉を脱りん処理又は脱炭処理を行う兼用炉として採用して、前記第１の転炉で行っていた脱りん処理または前記第３の転炉で行っていた脱炭処理を第２の転炉に切り替えて、脱りん処理及び脱炭処理を行うことを特徴とする転炉設備の操業方法。 A converter having three converters arranged in order from the upstream side to the downstream side, a molten metal crane that conveys the molten metal from the upstream side to the converter, and a scrap crane that conveys scrap from the downstream side to the converter. In the operation method of the converter equipment that performs dephosphorization and decarburization in the furnace equipment,
Adopting the first converter located in the most upstream as the dephosphorization furnace,
Adopting the third converter located at the most downstream as the decarburization furnace,
The 2nd converter arranged between the 1st converter and the 3rd converter was adopted as a dual-purpose furnace which performs dephosphorization processing or decarburization processing, and was performed by the 1st converter A method for operating converter equipment, wherein the dephosphorization process or the decarburization process performed in the third converter is switched to the second converter to perform the dephosphorization process and the decarburization process. 前記第１の転炉で行っていた脱りん処理を第２の転炉に切り替えるにあたっては、
（ｉ）前記第１の転炉の予想寿命がきた時点で第２の転炉がスタンバイ状態であると想定される際には、実際に第１の転炉の予想寿命がきた時点で第１の転炉での脱りん処理を第２の転炉に切り替える、
（ii）前記第１の転炉の予想寿命がきた時点で第２の転炉が炉修中であると想定される際には、第２の転炉における炉修の開始を早め、実際に第１の転炉の予想寿命がくる時点までに前記炉修を終了させてから第１の転炉での脱りん処理を第２の転炉に切り替える、
（iii）前記第１の転炉の予想寿命がきた時点で第２の転炉が脱炭処理中であると想定される際には、実際に第１の転炉の予想寿命がきた時点で第２の転炉の脱炭処理を終了してから第１の転炉での脱りん処理を第２の転炉に切り替える、
のいずれか１つを行うことを特徴とする請求項１に記載の転炉の操業方法。 In switching the dephosphorization process performed in the first converter to the second converter,
(I) When it is assumed that the second converter is in a standby state at the time when the expected life of the first converter comes, the first when the expected life of the first converter actually comes Switch the dephosphorization process in the second converter to the second converter,
(Ii) When it is assumed that the second converter is being repaired at the time when the expected life of the first converter is reached, the start of the furnace repair in the second converter is accelerated and actually Switching the dephosphorization process in the first converter to the second converter after finishing the furnace repair by the time when the expected life of the first converter is reached,
(Iii) When it is assumed that the second converter is being decarburized when the expected life of the first converter is reached, when the expected life of the first converter is actually reached After the decarburization process of the second converter is completed, the dephosphorization process in the first converter is switched to the second converter.
Any one of these is performed, The operating method of the converter of Claim 1 characterized by the above-mentioned. 前記第１の転炉で行っていた脱りん処理を第２の転炉に切り替えて、その後、前記第２の転炉で行っている脱りん処理を第１の転炉に切り替えるに際し、
（ｉｖ）第２の転炉と第３の転炉との炉修期間が重複せず且つ第２の転炉又は第３の転炉のいずれか一方が他方よりも予想寿命が早くくると想定される際には、一方の転炉が実際に予想寿命に達した時点で脱りん処理を第１の転炉に切り替える、
（ｖ）第２の転炉と第３の転炉との炉修期間が重複し且つ第２の転炉又は第３の転炉のいずれか一方が他方よりも予想寿命が早いと想定される際には、一方の転炉における炉修の開始を早め、実際に他方の転炉の予想寿命がくる時点までに前記炉修を終了させてから第２転炉での脱りん処理を第１の転炉に切り替える、
のいずれか１つを行うことを特徴とする請求項１又は２に記載の転炉の操業方法。 When switching the dephosphorization process performed in the first converter to the second converter, and then switching the dephosphorization process performed in the second converter to the first converter,
(Iv) It is assumed that the repair periods of the second converter and the third converter do not overlap and that either the second converter or the third converter has an expected life earlier than the other. When one of the converters actually reaches the expected life, the dephosphorization process is switched to the first converter.
(V) It is assumed that the furnace repair periods of the second converter and the third converter overlap and that either the second converter or the third converter has an expected life earlier than the other. In this case, the start of the furnace repair in one converter is advanced, and after the furnace repair is actually completed until the expected life of the other converter is reached, the dephosphorization process in the second converter is performed first. Switch to the converter
Any one of these is performed, The operating method of the converter of Claim 1 or 2 characterized by the above-mentioned. 上流側から下流側に向けて順に並べられた３基の転炉と、前記転炉に上流側から溶湯を搬送する溶湯クレーンと、転炉に下流側からスクラップを搬送するスクラップクレーンとを有する転炉設備において、
最上流に配置された第１の転炉は脱りん炉と、
最下流に配置された第３の転炉は脱炭炉と、
第１の転炉と第３の転炉との間に配置され、脱りん処理又は脱炭処理を行う兼用炉である第２の転炉と、前記第１の転炉で行っていた脱りん処理または前記第３の転炉で行っていた脱炭処理を第２の転炉に切り替える手段と、を備えることを特徴とする転炉設備。 A converter having three converters arranged in order from the upstream side to the downstream side, a molten metal crane that conveys the molten metal from the upstream side to the converter, and a scrap crane that conveys scrap from the downstream side to the converter. In the furnace equipment,
First converter unit located closest to the upstream and dephosphorization furnace,
The third converter unit located closest to the downstream and Datsusumiro,
It is disposed between the first converter and the third converter, a second converter which is combined furnace for performing dephosphorization treatment or decarburization has been performed by the first converter dephosphorization And a means for switching the decarburization process performed in the third converter to the second converter .
JP2006248403A 2006-09-13 2006-09-13 Converter operating method and converter equipment Expired - Fee Related JP4789757B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006248403A JP4789757B2 (en) 2006-09-13 2006-09-13 Converter operating method and converter equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006248403A JP4789757B2 (en) 2006-09-13 2006-09-13 Converter operating method and converter equipment

Publications (2)

Publication Number Publication Date
JP2008069400A JP2008069400A (en) 2008-03-27
JP4789757B2 true JP4789757B2 (en) 2011-10-12

Family

ID=39291244

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006248403A Expired - Fee Related JP4789757B2 (en) 2006-09-13 2006-09-13 Converter operating method and converter equipment

Country Status (1)

Country Link
JP (1) JP4789757B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101550667B1 (en) 2013-11-25 2015-09-07 주식회사 포스코 Method for manufacturing molten steel
JP6165656B2 (en) * 2014-03-19 2017-07-19 株式会社神戸製鋼所 Life prediction method for refractories in the furnace

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3379113B2 (en) * 1992-08-26 2003-02-17 日本鋼管株式会社 Converter steelmaking method
JPH06316719A (en) * 1993-08-27 1994-11-15 Nippon Steel Corp Converter steelmaking method
JP4555764B2 (en) * 2005-10-18 2010-10-06 新日本製鐵株式会社 Converter refining method

Also Published As

Publication number Publication date
JP2008069400A (en) 2008-03-27

Similar Documents

Publication Publication Date Title
JP4789757B2 (en) Converter operating method and converter equipment
JP5230062B2 (en) Operation method of converter facilities
US3257105A (en) Steel plant layout
US20100025899A1 (en) Method and device for operating a change converter unit of an oxygen steel-making plant
JP5273898B2 (en) Operation method of converter facilities
JP5460393B2 (en) Operation method of converter facilities
JP5164312B2 (en) Scrap charging method for converter facilities
JP2006322024A (en) Method for operating converter facility
JP5258149B2 (en) Operation method of converter facilities
JP5164313B2 (en) Steel making equipment and ladle transport method
JP4651598B2 (en) Falling object collection method for converter equipment
JP5460392B2 (en) Operation method of converter facilities
JP5191084B2 (en) Converter equipment or method of operating converter equipment
JP4667357B2 (en) Method of charging cold iron source to converter
JP4651599B2 (en) Converter equipment
KR101947302B1 (en) Charcoal treatment method and apparatus
JP6057888B2 (en) Distribution method of hot metal ladle in hot metal processing plant
JP5283309B2 (en) Operation method of converter facilities
JP5159029B2 (en) Operation method of converter facilities
JP6648365B2 (en) How to determine the start time of continuous casting
JP6037921B2 (en) Operating method of hot metal processing plant
JP2016167129A (en) Physical distribution processing scheduling apparatus in steelmaking plant
JP4109239B2 (en) Hot metal supply method to converter
JP6520255B2 (en) Operation method of converter
JP6066857B2 (en) Hot metal transport method in hot metal processing plant and converter plant equipped with two dephosphorization furnaces

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080926

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110128

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110308

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110506

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110719

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110719

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140729

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4789757

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees