JPWO2013132790A1 - Hot metal ladle transport device and hot ladle transport method - Google Patents

Hot metal ladle transport device and hot ladle transport method Download PDF

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JPWO2013132790A1
JPWO2013132790A1 JP2013523409A JP2013523409A JPWO2013132790A1 JP WO2013132790 A1 JPWO2013132790 A1 JP WO2013132790A1 JP 2013523409 A JP2013523409 A JP 2013523409A JP 2013523409 A JP2013523409 A JP 2013523409A JP WO2013132790 A1 JPWO2013132790 A1 JP WO2013132790A1
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hot metal
prevention lid
heat radiation
metal ladle
ladle
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JP5418732B1 (en
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山本　和人
和人 山本
孝彦 前田
孝彦 前田
俊朗 石毛
俊朗 石毛
修 内山
修 内山
純仁 小澤
純仁 小澤
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JFE Steel Corp
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C1/00—Refining of pig-iron; Cast iron
    • C21C1/06—Constructional features of mixers for pig-iron
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/12—Travelling or movable supports or containers for the charge
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/52—Manufacture of steel in electric furnaces
    • C21C5/5294—General arrangement or layout of the electric melt shop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/18—Door frames; Doors, lids, removable covers
    • F27D1/1808—Removable covers
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Intermediate Stations On Conveyors (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

多額の投資を必要とすることなく簡便な構成で放熱防止蓋の配置場所を確保し、かつ、溶銑を排出してから溶銑の受銑直前までの間に空容器状態となる溶銑鍋の開口部からの放熱量を低減することを可能とする。溶銑鍋５が積載される溶銑鍋の搬送装置１は、高炉からの溶銑を受銑する受銑位置と、溶銑を排出する溶銑排出位置との間を往復する。溶銑鍋の搬送装置１は、溶銑鍋５の開口部に載置される放熱防止蓋８を保持する放熱防止蓋保持装置３と、これらの溶銑鍋５と放熱防止蓋保持装置３とが配設される台車４，６とを備えている。Opening of the hot metal ladle that secures the location of the heat radiation prevention lid with a simple structure without requiring a large investment, and is in an empty container state immediately after the hot metal is discharged and immediately before receiving the hot metal It is possible to reduce the amount of heat released from the. The hot metal ladle conveying device 1 on which the hot metal ladle 5 is loaded reciprocates between a hot metal receiving position for receiving hot metal from the blast furnace and a hot metal discharge position for discharging hot metal. The hot metal ladle conveying device 1 is provided with a heat radiation prevention lid holding device 3 for holding a heat radiation prevention lid 8 placed at the opening of the hot metal ladle 5, and these hot metal ladle 5 and the heat radiation prevention lid holding device 3. Trucks 4 and 6 to be used.

Description

本発明は、溶銑鍋搬送装置及び溶銑鍋の搬送方法に関し、特に、溶銑鍋(hot metal ladle)及びこの溶銑鍋に収容される溶銑(hot metal)から、熱が放散することを防止するための放熱防止蓋が載置された溶銑鍋搬送装置及び、この溶銑鍋搬送装置を用いた溶銑鍋の搬送方法に関する。   The present invention relates to a hot metal ladle transport device and a hot metal ladle transport method, and in particular, to prevent heat from being dissipated from a hot metal ladle and hot metal contained in the hot metal ladle. The present invention relates to a hot metal ladle conveying device on which a heat dissipation prevention lid is placed and a hot metal ladle conveying method using the hot metal ladle conveying device.

溶銑を収容する溶銑鍋が積載される溶銑鍋搬送装置は、高炉から溶銑を受銑するための受銑位置と、製鋼工場等で、その溶銑鍋に収容されている溶銑を排出する溶銑排出位置との間を往復する。溶銑排出位置で、溶銑鍋に収容されていた溶銑を排出した後には、溶銑鍋は、溶銑を収容していない状態（「空容器状態」という）となる。ここで、空容器状態とは、溶銑を収容していない状態であって、溶銑を受銑している状態及び、溶銑を排出している状態を含まないものとする。   The hot metal ladle transport device on which the hot metal ladle containing hot metal is loaded has a hot metal receiving position for receiving hot metal from the blast furnace and a hot metal discharge position for discharging hot metal contained in the hot metal ladle at a steelmaking factory, etc. Return to and from. After the hot metal contained in the hot metal ladle is discharged at the hot metal discharge position, the hot metal ladle is in a state where no hot metal is contained (referred to as “empty container state”). Here, the empty container state is a state in which the hot metal is not accommodated, and does not include a state in which the hot metal is received and a state in which the hot metal is discharged.

溶銑鍋が積載される溶銑鍋搬送装置は、空容器状態で受銑位置まで移動しかつ待機する。溶銑鍋は、この受銑位置で高温の溶銑を受銑して、その内部に溶銑を収容する。この溶銑鍋搬送装置は、脱燐処理や脱硫処理、除滓などの、溶銑に対する溶銑予備処理(Hot metal pretreatment)が行われる予備処理位置に移動する。次いで、この予備処理位置で、溶銑鍋内の溶銑に対して溶銑予備処理が行われる。溶銑予備処理が行われた後の溶銑を収容する溶銑鍋は、予備処理位置から、転炉あるいは転炉への装入用の溶銑鍋などの次工程の設備に溶銑を排出する溶銑排出位置まで移動される。この溶銑排出位置で、溶銑予備処理後の溶銑が次工程の設備に排出されて、溶銑鍋は再び空容器状態となる。再び、空容器状態の溶銑鍋が積載される溶銑鍋搬送装置が、受銑位置まで移動して、高炉から溶銑を受銑することになる。このようにして、同じ溶銑鍋で溶銑の受銑と溶銑の予備処理と溶銑の排出とが繰り返される。   The hot metal ladle conveying device on which the hot metal ladle is loaded moves to a receiving position in an empty container state and stands by. The hot metal ladle receives hot hot metal at the receiving position and accommodates hot metal therein. This hot metal ladle conveying device moves to a pretreatment position where hot metal pretreatment for hot metal, such as dephosphorization, desulfurization, and removal, is performed. Next, hot metal preliminary processing is performed on the hot metal in the hot metal ladle at this preliminary processing position. The hot metal ladle containing hot metal after hot metal pretreatment is performed from the pretreatment position to the hot metal discharge position for discharging hot metal to the next process equipment such as the hot metal ladle for charging to the converter or converter. Moved. At this hot metal discharge position, the hot metal after the hot metal pretreatment is discharged to the next process equipment, and the hot metal ladle is again in an empty container state. Again, the hot metal ladle conveying device on which the hot metal ladle in an empty container state is loaded moves to the receiving position and receives the hot metal from the blast furnace. In this way, the hot metal receiving, hot metal pretreatment and hot metal discharge are repeated in the same hot metal ladle.

溶銑鍋で高炉から溶銑を受銑してから、この溶銑を次工程の設備に排出するまでの間には、溶銑鍋の内部には高温の溶銑が収容されているため、溶銑鍋の温度は比較的高く保たれている。一方で、溶銑を排出した後には、溶銑鍋が空容器状態となり、溶銑鍋の温度は急激に低下してしまう。受銑する直前のときの空容器状態である溶銑鍋の温度が低い場合には、高炉で受銑した後の溶銑の熱を溶銑鍋が奪ってしまい、溶銑の温度が低下してしまう。溶銑の温度が低下すると、溶銑予備処理として脱硫処理を行う際に脱硫効率が低下して処理時間が長くなったり、転炉での脱炭精錬では鉄スクラップの配合率を低下せざるを得なかったりし、溶銑を加熱しなければならない場合も発生し、製造コストを上昇させる原因となる。   Since hot metal is stored inside the hot metal ladle after the hot metal is received from the blast furnace until the hot metal is discharged to the next process equipment, the temperature of the hot metal ladle is It is kept relatively high. On the other hand, after discharging the hot metal, the hot metal ladle is in an empty container state, and the temperature of the hot metal ladle is rapidly lowered. When the temperature of the hot metal ladle, which is in an empty container state just before receiving, is low, the hot metal pan takes away the heat of the hot metal after receiving in the blast furnace, and the temperature of the hot metal decreases. If the temperature of the hot metal decreases, the desulfurization efficiency decreases when the desulfurization treatment is performed as a hot metal pretreatment, and the treatment time becomes longer, or the decarburization refining in the converter must reduce the mixing ratio of iron scrap. In some cases, the hot metal must be heated, which increases the manufacturing cost.

したがって、脱硫処理の効率を向上させるなどのために、空容器状態である溶銑鍋の内部の熱が放散することに起因する、溶銑鍋の温度低下を防止することが望ましい。そこで、溶銑鍋から熱が放散することを防止して内部の温度を保温する（「保熱」という）技術が種々検討されている。特に、溶銑鍋は混銑車と比較して開口部が広いことから、溶銑鍋の外周面から放熱する熱量よりも開口部から放熱する熱量の方が大きいために、開口部に蓋を載置する事が効果的である。   Therefore, in order to improve the efficiency of the desulfurization treatment, it is desirable to prevent a temperature drop of the hot metal ladle caused by the heat dissipated inside the hot metal ladle in an empty container state. Therefore, various techniques for preventing the heat from being dissipated from the hot metal ladle and keeping the internal temperature (referred to as “heat retention”) are being studied. In particular, the hot metal pan has a wider opening compared to the kneading car, so the amount of heat radiated from the opening is larger than the amount of heat radiated from the outer peripheral surface of the hot metal pan, so a lid is placed on the opening. Things are effective.

具体的には、溶銑鍋を含む溶銑運搬容器を保熱する技術が検討され、以下のように幾つか提案されている。例えば、特許文献１には、溶銑を排出した後の空容器状態となる、溶銑運搬容器である混銑車(torpedo car)の受銑口（開口部）に、薄鋼板をのせ、この薄鋼板の上方から受銑口より小径の押圧トングを押圧して、受銑口に鋼板を押し込んでその受銑部を閉塞することによって、混銑車の開口部に蓋を載置することが開示されている。また、特許文献１の発明は、受銑に際して、混銑車の受銑口にのった鋼板を押し込むことによって形成された中凹み部分に溶銑を受銑し、蓋となっていたこの鋼板を溶銑とともに混銑車内に脱落させて、この鋼板を溶銑中に溶かして、この鋼板を溶銑量増加の形で回収している。   Specifically, a technique for keeping heat of the hot metal transport container including the hot metal ladle has been studied, and several techniques have been proposed as follows. For example, in Patent Document 1, a thin steel plate is placed on a receiving port (opening) of a tornado car (torpedo car) which is an empty container state after the hot metal is discharged. It is disclosed that a lid is placed on the opening of a kneading vehicle by pressing a pressing tongue having a small diameter from above and pressing a steel plate into the receiving port to close the receiving portion. . Further, the invention of Patent Document 1 accepts hot metal in a hollow portion formed by pushing a steel plate placed on a receiving port of a kneading wheel at the time of receiving, and uses the steel plate that has been a lid as a hot metal. At the same time, it is dropped into the kneading vehicle, and this steel plate is melted in the hot metal, and this steel plate is recovered in the form of an increase in the amount of hot metal.

特許文献２には、溶銑鍋に保温蓋を被せて溶銑を保熱する技術が開示されており、溶銑の搬送中であって溶銑予備処理などの作業をしていない間に、溶銑鍋に保温蓋をすることが開示されている。   Patent Document 2 discloses a technique for keeping hot metal by covering a hot metal ladle with a heat insulation lid, and keeping hot metal in the hot metal ladle while the hot metal is being transported and the hot metal pretreatment is not performed. A lid is disclosed.

特開昭６１−０６４８０８号公報Japanese Patent Laid-Open No. 61-064808 特公平２−００６８０７号公報Japanese Patent Publication No. 2-006807

しかしながら、上記従来技術には、以下の問題点がある。   However, the above prior art has the following problems.

特許文献１の発明は、溶銑鍋より開口部が小さい混銑車を対象としており、開口部が広い溶銑鍋の開口部に蓋を載置することを考慮していない。仮に、特許文献１に開示されている鋼板を溶銑鍋の開口部に用いても、押圧トングで押圧する必要があり、広い開口部に対応する押圧トングを有する設備のコストが増加するのみならず、作業が煩雑となる。加えて、開口部が広い溶銑鍋では、開口部に薄鋼板を載せるための設備が別途必要となり、製造コスト上昇の原因となり、特許文献１の発明を溶銑鍋に適用することは難しい。   The invention of Patent Document 1 is intended for a kneading vehicle having an opening smaller than the hot metal ladle, and does not consider placing a lid on the opening of the hot metal ladle having a wide opening. Even if the steel plate disclosed in Patent Document 1 is used for the opening of the hot metal ladle, it is necessary to press with a pressing tongue, which not only increases the cost of equipment having a pressing tongue corresponding to a wide opening. The work becomes complicated. In addition, in the hot metal ladle having a wide opening, a facility for placing the thin steel plate in the opening is necessary, which causes an increase in manufacturing cost, and it is difficult to apply the invention of Patent Document 1 to the hot metal ladle.

特許文献２における保温蓋の利用は、溶銑鍋に収容した溶銑の温度低下を抑えることを目的にしており、溶銑鍋が空容器状態の間における放熱低減を考慮していない。また、特許文献２の発明に係る装置は、溶銑鍋とこの保温蓋開閉機構が一体となっており、かつ、この装置の構造は複雑である。このため、特許文献２の発明に係る装置を、現在使用している溶銑鍋の全てに設けるには多額の設備投資が必要となり、特許文献２の発明を適用することは現実的ではない。   The use of the heat insulating lid in Patent Document 2 is intended to suppress the temperature drop of the hot metal accommodated in the hot metal ladle, and does not consider the reduction of heat dissipation while the hot metal pan is in an empty container state. Moreover, the apparatus which concerns on invention of patent document 2 is integrating the hot metal ladle and this heat insulation lid | cover opening / closing mechanism, and the structure of this apparatus is complicated. For this reason, a large amount of capital investment is required to install the apparatus according to the invention of Patent Document 2 in all the hot metal hot pots currently used, and it is not realistic to apply the invention of Patent Document 2.

上記の従来技術を考慮した上で、空容器状態の溶銑鍋からの放熱量を抑えることを目的として、取り外し可能な放熱防止蓋を溶銑鍋の開口部に載置した状態で、溶銑を排出した後の空容器状態となった溶銑鍋を溶銑排出位置から受銑位置まで搬送する操業を想定する。その操業においては、溶銑排出位置または溶銑排出位置の付近に、放熱防止蓋載置位置を設けて、その放熱防止蓋載置位置で、空容器状態の溶銑鍋の開口部に放熱防止蓋を載置する必要がある。また、溶銑鍋で溶銑を受銑するために、受銑位置でまたは受銑位置の付近に放熱防止蓋取外位置を設けて、その放熱防止蓋取外位置で、溶銑鍋から放熱防止蓋を取り外しておく必要がある。その放熱防止蓋取外位置で、溶銑鍋から蓋を取り外すとしても、その取り外された高温である蓋を一時的に保管する場所の確保や、その場所及び保管される蓋の管理が面倒であることが推測される。   In consideration of the above prior art, the hot metal was discharged in a state where a removable heat radiation prevention lid was placed on the opening of the hot metal pan in order to suppress the heat radiation from the hot metal pan in the empty container state. Assume an operation in which the hot metal ladle that is in an empty container later is transported from the hot metal discharge position to the receiving position. In that operation, a heat radiation prevention lid mounting position is provided near or near the hot metal discharge position, and the heat radiation prevention lid is placed at the opening of the hot metal ladle in the empty container state at the heat radiation prevention lid placement position. Need to be placed. In addition, in order to receive hot metal with the hot metal ladle, a heat radiation prevention lid removal position is provided at or near the receiving position, and the heat radiation prevention lid is removed from the hot metal ladle at the heat radiation prevention lid removal position. It is necessary to remove it. Even if the lid is removed from the hot metal ladle at the heat removal prevention lid removal position, it is troublesome to secure a place to temporarily store the removed high temperature lid and to manage the place and the lid to be stored. I guess that.

本発明は、上述のような事情に鑑みてなされたもので、多額の投資を必要とすることなく簡便な構成で放熱防止蓋の配置場所を確保し、かつ、溶銑を排出してから溶銑の受銑直前までの間に空容器状態となる溶銑鍋の開口部からの放熱量を低減することを可能とする溶銑鍋搬送装置及び溶銑鍋の搬送方法を提供することを目的とする。   The present invention has been made in view of the circumstances as described above, and it is possible to secure a place for dissipating the heat dissipation lid with a simple configuration without requiring a large amount of investment, and after discharging the hot metal, It is an object of the present invention to provide a hot metal ladle transport device and a hot metal ladle transport method capable of reducing the amount of heat released from the opening of the hot metal ladle that is in an empty container state immediately before receiving the hot metal.

上述の課題を解決するための本発明の要旨は以下のとおりである。
（１）高炉からの溶銑を受銑する受銑位置と、該溶銑を排出する溶銑排出位置との間を往復し、溶銑鍋が積載される溶銑鍋搬送装置であって、前記溶銑鍋の開口部に載置される放熱防止蓋を保持する放熱防止蓋保持装置と、前記溶銑鍋と前記放熱防止蓋保持装置とが配設される台車と、を有する溶銑鍋搬送装置。
（２）高炉からの溶銑を受銑する受銑位置と、該溶銑を排出する溶銑排出位置との間を往復し、溶銑鍋が積載される溶銑鍋搬送装置であって、
前記溶銑鍋の開口部に載置される放熱防止蓋を保持する放熱防止蓋保持装置と、前記放熱防止蓋保持装置が配設される台車と、前記溶銑鍋が配設される台車と、を有する溶銑鍋搬送装置。
（３）前記放熱防止蓋保持装置は、前記放熱防止蓋の動きを規制する枠を有する（１）または（２）に記載の溶銑鍋搬送装置。
（４）上記（１）または(２)に記載の溶銑鍋搬送装置を用いた溶銑鍋の搬送方法であって、溶銑排出位置で、前記溶銑鍋に収容されている溶銑を排出し、前記放熱防止蓋保持装置に保持される放熱防止蓋を、放熱防止蓋載置装置を用いて溶銑が排出された溶銑鍋の開口部に載置し、前記溶銑鍋搬送装置を、受銑位置または該受銑位置に近接した放熱防止蓋取外位置へ移動し、前記溶銑鍋の上に載置される放熱防止蓋を、放熱防止蓋取外装置を用いて、前記溶銑鍋から取り外し、該取り外された放熱防止蓋を放熱防止蓋保持装置に載置し、次いで、前記溶銑鍋で受銑することを特徴とする溶銑鍋の搬送方法。The gist of the present invention for solving the above-mentioned problems is as follows.
(1) A hot metal ladle transporting device that reciprocates between a hot metal receiving position for receiving hot metal from a blast furnace and a hot metal discharge position for discharging the hot metal, and on which the hot metal ladle is loaded. A hot metal ladle transporting device comprising: a heat radiation prevention lid holding device that holds a heat radiation prevention lid placed on the unit; and a carriage on which the hot metal ladle and the heat radiation prevention lid holding device are disposed.
(2) A hot metal ladle transporting device that reciprocates between a receiving position for receiving hot metal from a blast furnace and a hot metal discharge position for discharging the hot metal,
A heat radiation prevention lid holding device that holds a heat radiation prevention lid placed on the opening of the hot metal ladle, a carriage on which the heat radiation prevention lid holding device is disposed, and a carriage on which the hot metal pan is disposed. Having hot metal ladle transport device.
(3) The hot metal ladle transport device according to (1) or (2), wherein the heat dissipation prevention lid holding device has a frame that regulates movement of the heat dissipation prevention lid.
(4) A hot metal ladle transport method using the hot metal ladle transport device according to (1) or (2), wherein the hot metal contained in the hot metal ladle is discharged at the hot metal discharge position, and the heat dissipation The heat radiation prevention lid held by the prevention lid holding device is placed on the opening of the hot metal ladle from which the hot metal has been discharged using the heat radiation prevention lid placing device, and the hot metal ladle transporting device is placed at the receiving position or the receiving position. The heat dissipating lid is moved to the heat dissipating prevention lid removal position close to the scissor position, and the heat dissipating prevention lid placed on the hot metal pan is removed from the hot metal pan using the heat dissipating prevention lid removing device. A method for transporting a hot metal ladle comprising placing a heat radiation prevention lid on a heat radiation prevention lid holding device and then receiving the lid with the hot metal ladle.

本発明に係る溶銑鍋搬送装置には、放熱防止蓋を保持する放熱防止蓋保持装置が設けられているので、高温となる放熱防止蓋の保管場所を、放熱防止蓋取外位置や放熱防止蓋載置位置に設ける必要もなくなる。本発明に係る溶銑鍋の搬送方法によれば、溶銑鍋から取り外し可能な放熱防止蓋を用いる簡便な方法によって、溶銑の排出後から受銑直前までの空容器状態の溶銑鍋の保熱が可能になり、また、受銑位置における溶銑鍋の温度の低下が大幅に減少し、これにより、溶銑鍋に収容される溶銑の温度低下を防ぐことができる。   The hot metal ladle transport device according to the present invention is provided with a heat dissipation prevention lid holding device that holds the heat dissipation prevention lid. There is no need to provide the mounting position. According to the method for transporting the hot metal ladle according to the present invention, it is possible to keep the hot metal ladle in an empty container state from after the hot metal is discharged to immediately before receiving by a simple method using a heat radiation prevention lid that is removable from the hot metal pan. Moreover, the fall of the temperature of the hot metal ladle at the receiving position is greatly reduced, and thus the temperature drop of the hot metal accommodated in the hot metal ladle can be prevented.

本発明の溶銑鍋搬送装置を示す概略側面図である。It is a schematic side view which shows the hot metal ladle conveying apparatus of this invention. 本発明の溶銑鍋搬送装置が走行するレールを示す概略平面図である。It is a schematic plan view which shows the rail which the hot metal ladle conveyance apparatus of this invention drive | works. 放熱防止蓋保持装置から、クレーンによって放熱防止蓋を取り外す状態を示す概略側面図である。It is a schematic side view which shows the state which removes a heat radiation prevention lid with a crane from a heat radiation prevention lid holding device. 溶銑鍋から、クレーンによって放熱防止蓋を取り外す状態を示す概略側面図である。It is a schematic side view which shows the state which removes a thermal radiation prevention cover with a crane from a hot metal ladle. 本発明例と比較例とにおける、溶銑の排出終了からの経過時間と溶銑鍋の耐火物温度との関係を示すグラフである。It is a graph which shows the relationship between the elapsed time from the completion | finish of discharge of hot metal, and the refractory temperature of a hot metal ladle in the example of this invention and a comparative example. 本発明例と比較例とにおける、溶銑温度低下を示すグラフである。It is a graph which shows the hot metal temperature fall in this invention example and a comparative example.

以下、添付図面を参照して本発明を具体的に説明する。図１は、本発明の溶銑鍋搬送装置を示す概略側面図である。図１に示すように、溶銑鍋５が積載される溶銑鍋搬送装置１は、機関車２と、放熱防止蓋保持装置３と、その放熱防止蓋保持装置３が配設されている第１の台車４と、溶銑鍋５が配設されている第２の台車６とを有している。機関車２と第１の台車４と第２の台車６とはそれぞれ連結されており、レール７の上に載置されている。機関車２は、図示しない自走のための駆動機構を有しており、この機関車２に連結している第１の台車４と第２の台車６とともに、レール７上を走行する。   Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a schematic side view showing a hot metal ladle conveying device of the present invention. As shown in FIG. 1, the hot metal ladle conveying device 1 on which the hot metal ladle 5 is loaded is a first in which a locomotive 2, a heat radiation prevention lid holding device 3, and a heat radiation prevention lid holding device 3 are arranged. It has a cart 4 and a second cart 6 on which a hot metal ladle 5 is disposed. The locomotive 2, the first carriage 4 and the second carriage 6 are connected to each other and placed on the rail 7. The locomotive 2 has a drive mechanism for self-running (not shown), and travels on the rail 7 together with the first carriage 4 and the second carriage 6 connected to the locomotive 2.

図１に示す溶銑鍋搬送装置１は、機関車２と第１の台車４と第２の台車６とを個別に有しており、放熱防止蓋保持装置３が配置されている第１の台車４は、溶銑鍋５が配置されている第２の台車６とは異なっている。しかしながら、１つの台車上の空間が十分に大きければ、放熱防止蓋保持装置３と溶銑鍋５とが配設される台車を１つにしてもよい。また、機関車２の駆動機構を、放熱防止蓋保持装置３と溶銑鍋５とが配置される１つの台車に設けて、その１つの台車を自走駆動できるようにしてもよい。いずれにせよ、本発明に係る溶銑鍋搬送装置は、放熱防止蓋保持装置３と溶銑鍋５とが配設される台車を有している。   The hot metal ladle conveying device 1 shown in FIG. 1 has a locomotive 2, a first cart 4, and a second cart 6, and a first cart in which a heat dissipation prevention lid holding device 3 is arranged. 4 is different from the second cart 6 in which the hot metal ladle 5 is arranged. However, if the space on one carriage is sufficiently large, the carriage on which the heat radiation prevention lid holding device 3 and the hot metal ladle 5 are disposed may be one. Moreover, the drive mechanism of the locomotive 2 may be provided in one cart where the heat radiation prevention lid holding device 3 and the hot metal ladle 5 are arranged so that the one cart can be driven by itself. In any case, the hot metal ladle conveying device according to the present invention has a carriage on which the heat radiation prevention lid holding device 3 and the hot metal ladle 5 are disposed.

溶銑鍋５は図示しない溶銑を収容し得るし、また、溶銑を排出して空容器状態となり得る。溶銑鍋５の開口部上には、放熱防止蓋８が載置され得る。載置される放熱防止蓋８によって、空容器状態の溶銑鍋５の開口部からの放熱量が抑えられる。また、溶銑鍋５の内面には、図示されない耐火物が設置されており、溶銑鍋５は、溶銑鍋５の外殻を構成する材料に溶銑の熱が伝導しにくい構造となっている。   The hot metal ladle 5 can accommodate hot metal (not shown), and can discharge the hot metal to become an empty container. On the opening of the hot metal ladle 5, a heat radiation prevention lid 8 can be placed. The amount of heat released from the opening of the hot metal ladle 5 in an empty container state is suppressed by the heat radiation prevention lid 8 placed. In addition, a refractory (not shown) is installed on the inner surface of the hot metal ladle 5, and the hot metal ladle 5 has a structure in which the heat of the hot metal is difficult to conduct to the material constituting the outer shell of the hot metal ladle 5.

放熱防止蓋保持装置３は、放熱防止蓋８を保持可能な形状を有しており、この放熱防止蓋保持装置３には、溶銑鍋５から取り外される放熱防止蓋８が載置される。放熱防止蓋保持装置３は、その中心に載置される放熱防止蓋８の外側の周面に接触して、放熱防止蓋８の動きを規制する枠１０を有することが好ましい。この枠１０によって、放熱防止蓋８を保持し得る。放熱防止蓋保持装置３が配設されている第１の台車４には鋼材および／または無機材料からなる耐熱部材２１が載せられており、その上に、高温になり得る放熱防止蓋８を載置しても、第１の台車４は熱で損傷することはない。   The heat radiation prevention lid holding device 3 has a shape capable of holding the heat radiation prevention lid 8, and the heat radiation prevention lid 8 to be removed from the hot metal ladle 5 is placed on the heat radiation prevention lid holding device 3. The heat radiation prevention lid holding device 3 preferably has a frame 10 that contacts the outer peripheral surface of the heat radiation prevention lid 8 placed at the center thereof and restricts the movement of the heat radiation prevention lid 8. The frame 10 can hold the heat dissipation prevention lid 8. A heat-resistant member 21 made of a steel material and / or an inorganic material is placed on the first carriage 4 on which the heat-dissipation-preventing lid holding device 3 is disposed, and a heat-dissipation prevention lid 8 that can become high temperature is placed thereon. Even if placed, the first carriage 4 is not damaged by heat.

放熱防止蓋保持装置３が第１の台車４に配設されているので、後述する放熱防止蓋取外位置などの付近に、高温になり得る放熱防止蓋８を配置する配置場所を設けて、放熱防止蓋８を管理する必要がない。また、第１の台車４の移動とともに、放熱防止蓋８も移動するので、別途、放熱防止蓋８のみを輸送させる設備の必要もない。   Since the heat radiation prevention lid holding device 3 is disposed on the first carriage 4, an arrangement place for disposing the heat radiation prevention lid 8 that can become high temperature is provided in the vicinity of a heat radiation prevention lid removal position, which will be described later, There is no need to manage the heat radiation prevention lid 8. Moreover, since the heat radiation prevention lid 8 also moves with the movement of the first carriage 4, there is no need for a separate facility for transporting only the heat radiation prevention lid 8.

図１では、説明のために溶銑鍋５と放熱防止蓋保持装置３との両方に、放熱防止蓋８が載置されているが、実際の、溶銑鍋搬送装置１の運用では、溶銑鍋５と放熱防止蓋保持装置３とのいずれか一方に、放熱防止蓋８が載置される。溶銑鍋５およびそれを積載する台車６を２組連結して搬送する場合の放熱防止蓋８の置き場や、溶銑鍋５が補修される場合などに生じる余剰の放熱防止蓋８の置き場として、放熱防止蓋保持装置３には、２枚以上の放熱防止蓋８を重ねて置くことも可能である。   In FIG. 1, for the purpose of explanation, a heat radiation prevention lid 8 is placed on both the hot metal ladle 5 and the heat radiation prevention lid holding device 3. The heat radiation prevention lid 8 is placed on either the heat radiation prevention lid holding device 3. As a place for the heat radiation prevention lid 8 when two sets of the hot metal ladle 5 and the carriage 6 on which the hot metal ladle 5 is loaded are transported, or as a place for the surplus heat radiation prevention lid 8 generated when the hot metal ladle 5 is repaired, Two or more heat radiation prevention lids 8 can be placed on the prevention lid holding device 3 in an overlapping manner.

図２は、本発明の溶銑鍋搬送装置が走行するレールを示す概略平面図である。レール７は、溶銑排出位置１１と、放熱防止蓋載置位置１２と、放熱防止蓋取外位置１４と、受銑位置１３と、予備処理位置１５とに接続している。溶銑鍋搬送装置１は、レール７上を走行して、溶銑排出位置１１と、放熱防止蓋載置位置１２と、放熱防止蓋取外位置１４と、受銑位置１３と、予備処理位置１５との各々の位置で停止する。各々の位置では、溶銑鍋搬送装置１の溶銑鍋５、及び、この溶銑鍋５に収容される溶銑に対して、各位置に応じた所定の処理が行われる。   FIG. 2 is a schematic plan view showing a rail on which the hot metal ladle conveying device of the present invention travels. The rail 7 is connected to a hot metal discharge position 11, a heat radiation prevention lid placement position 12, a heat radiation prevention lid removal position 14, a receiving position 13, and a pretreatment position 15. The hot metal ladle conveying device 1 travels on the rail 7, and the hot metal discharge position 11, the heat radiation prevention lid placement position 12, the heat radiation prevention lid removal position 14, the heat sink position 13, and the preliminary processing position 15. Stop at each position. In each position, a predetermined process corresponding to each position is performed on the hot metal ladle 5 of the hot metal ladle transport device 1 and the hot metal accommodated in the hot metal ladle 5.

溶銑排出位置１１では、溶銑鍋５に収容されている溶銑が、次工程の設備あるいは次工程の設備への装入用の溶銑鍋に排出されて、溶銑鍋５が空容器状態となる。溶銑鍋５が空容器状態であっても、溶銑を排出した直後では、概ね１３００〜１４００℃である高温の溶銑から伝導した熱が溶銑鍋５に残留しており、溶銑鍋５の内面の温度は、概ね８００〜１１００℃である。溶銑を排出した溶銑鍋５が積載された後に、溶銑鍋搬送装置１は、放熱防止蓋載置位置１２に移動する。   At the hot metal discharge position 11, the hot metal contained in the hot metal ladle 5 is discharged to the next process equipment or the hot metal ladle for charging into the next process equipment, and the hot metal ladle 5 is in an empty container state. Even if the hot metal ladle 5 is in an empty container state, immediately after the hot metal is discharged, the heat conducted from the hot hot metal of approximately 1300 to 1400 ° C. remains in the hot metal ladle 5 and the temperature of the inner surface of the hot metal ladle 5 Is approximately 800 to 1100 ° C. After the hot metal ladle 5 from which the hot metal has been discharged is loaded, the hot metal ladle transport device 1 moves to the heat radiation prevention lid mounting position 12.

図３は、放熱防止蓋保持装置から、クレーンによって放熱防止蓋を取り外す状態を示す概略側面図である。図１及び図３に示すように、放熱防止蓋８の上面に突起物９が形成されている。クレーン（放熱防止蓋載置装置）１６は、フック（蓋取外し部材）１７を有している。この突起物９は、吊り取手の形状をしており、この吊り取手の部分にフック１７が係合可能な構造となっている。このように、突起物９は、このフック１７がこの突起物９に係合することを可能とする形状を有していることが好ましい。   FIG. 3: is a schematic side view which shows the state which removes a heat radiation prevention cover with a crane from a heat radiation prevention cover holding | maintenance apparatus. As shown in FIGS. 1 and 3, a protrusion 9 is formed on the upper surface of the heat radiation prevention lid 8. The crane (heat radiation prevention lid placing device) 16 has a hook (lid removal member) 17. The protrusion 9 has a shape of a hanging handle, and has a structure in which a hook 17 can be engaged with the portion of the hanging handle. Thus, the projection 9 preferably has a shape that allows the hook 17 to engage with the projection 9.

放熱防止蓋載置位置１２では、クレーン１６が有するフック１７を突起物９に係合させて、クレーン１６を用いて、放熱防止蓋保持装置３に保持されている放熱防止蓋８を取り外し、次いで、この放熱防止蓋８を溶銑鍋５に載置する。放熱防止蓋８によって、溶銑を排出した直後の比較的に高い温度を有している空容器状態の溶銑鍋５からの、開口部からの放熱量が抑えられる。放熱防止蓋８が溶銑鍋５に載置された後に、溶銑鍋搬送装置１は、放熱防止蓋取外位置１４に移動する。放熱防止蓋取り外しは、溶銑鍋搬送装置１が受銑位置１３へ移動するタイミングを考慮した上で、可能な限りの時間、溶銑鍋５に放熱防止蓋８が載置されている状態とするように行うことが好ましい。溶銑鍋５に放熱防止蓋８が載置されている状態の時間が長い方が、溶銑鍋５からの放熱を防ぐことが可能となるからである。   At the heat radiation prevention lid placement position 12, the hook 17 of the crane 16 is engaged with the protrusion 9, and the heat radiation prevention lid 8 held by the heat radiation prevention lid holding device 3 is removed using the crane 16, and then The heat radiation prevention lid 8 is placed on the hot metal ladle 5. The heat radiation prevention lid 8 suppresses the amount of heat released from the opening from the hot metal ladle 5 in an empty container state having a relatively high temperature immediately after the hot metal is discharged. After the heat radiation prevention lid 8 is placed on the hot metal ladle 5, the hot metal ladle transport device 1 moves to the heat radiation prevention lid removal position 14. Considering the timing when the hot metal ladle transport device 1 moves to the receiving position 13, the heat radiation preventive lid removal is made to be in a state where the heat radiation preventive lid 8 is placed on the hot metal pan 5 for as long as possible. It is preferable to carry out. This is because heat dissipation from the hot metal ladle 5 can be prevented when the time during which the heat dissipation prevention lid 8 is placed on the hot metal ladle 5 is longer.

図４は、溶銑鍋から、クレーンによって放熱防止蓋を取り外す状態を示す概略側面図である。放熱防止蓋取外位置１４では、クレーン（放熱防止蓋取外装置）１８を用いて、溶銑鍋５に載置されている放熱防止蓋８を取り外し、次いで、この放熱防止蓋８を放熱防止蓋保持装置３に載置する。この放熱防止蓋保持装置３では、放熱防止蓋８が保持される。放熱防止蓋８は、放熱防止蓋取外位置１４またはその付近ではなく、第１の台車４に配設されている放熱防止蓋保持装置３に保持される。このため、放熱防止蓋８は、溶銑鍋搬送装置１とともに移動し、かつ、１つの溶銑鍋５に対して、載置されるべき１つの放熱防止蓋８とその放熱防止蓋８が保管される場所が特定される。   FIG. 4 is a schematic side view showing a state in which the heat radiation prevention lid is removed from the hot metal ladle by a crane. At the heat radiation prevention lid removal position 14, the heat radiation prevention lid 8 placed on the hot metal ladle 5 is removed using a crane (heat radiation prevention lid removal device) 18, and then the heat radiation prevention lid 8 is removed. Place on the holding device 3. In this heat radiation prevention lid holding device 3, the heat radiation prevention lid 8 is held. The heat radiation prevention lid 8 is held by the heat radiation prevention lid holding device 3 provided in the first carriage 4, not at or near the heat radiation prevention lid removal position 14. For this reason, the heat radiation prevention lid 8 moves together with the hot metal ladle transport device 1, and one heat radiation prevention lid 8 to be placed and one heat radiation prevention lid 8 are stored with respect to one hot metal ladle 5. A location is identified.

放熱防止蓋８が、溶銑鍋５から取り外されて放熱防止蓋保持装置３に保持された後に、溶銑鍋搬送装置１は、受銑位置１３に移動する。なお、図３及び図４に示したクレーン１６、１８が有するフック１７、１９を、放熱防止蓋８上に形成されている突起物９に係合させて、フック１７、１９が上下方向に移動して、放熱防止蓋８を取り扱っているが、本発明は、この形態に限らず、例えば、放熱防止蓋８の材質が鉄であれば、リフティングマグネットをクレーン１６、１８に設けて、このリフティングマグネットを利用して着脱することも可能である。   After the heat dissipation prevention lid 8 is removed from the hot metal ladle 5 and held by the heat dissipation prevention lid holding device 3, the hot metal ladle transport device 1 moves to the receiving position 13. The hooks 17 and 19 of the cranes 16 and 18 shown in FIGS. 3 and 4 are engaged with the protrusions 9 formed on the heat radiation prevention lid 8 so that the hooks 17 and 19 move in the vertical direction. However, the present invention is not limited to this embodiment. For example, if the material of the heat dissipation prevention lid 8 is iron, a lifting magnet is provided on the cranes 16 and 18 and the lifting is prevented. It is also possible to attach and detach using a magnet.

受銑位置１３では、溶銑鍋５で、高炉から溶銑を受銑する。溶銑鍋搬送装置１は、受銑位置１３に到着すると、溶銑鍋５を、高炉から溶銑を受銑するための所定の位置に配置する。受銑位置１３の付近には、図示しない高炉(Blast furnace)が存在している。高炉は、炉本体に出銑口(Tap hole)を有している。この出銑口から、炉本体で得られる溶銑が出銑される。出銑口の下流には、溶銑樋(Hot metal runner)が設置されており、溶銑が溶銑樋を流れる。溶銑が流れる方向における溶銑樋の先端部下方には、溶銑鍋５に溶銑を送るための傾注樋(Tilting iron runner)が設置されており、この傾注樋を通じて、受銑位置１３に停止している溶銑鍋搬送装置１に積載された溶銑鍋５に、溶銑が注入される。溶銑鍋５に溶銑が注入された後には、溶銑鍋搬送装置１は、予備処理位置１５へ移動する。   At the receiving position 13, the hot metal is received from the blast furnace in the hot metal ladle 5. When the hot metal ladle conveying device 1 arrives at the receiving position 13, the hot metal ladle 5 is arranged at a predetermined position for receiving hot metal from the blast furnace. A blast furnace (not shown) exists in the vicinity of the receiving position 13. The blast furnace has a tap hole in the furnace body. The hot metal obtained in the furnace body is extracted from this outlet. A hot metal runner is installed downstream of the outlet, and the hot metal flows through the hot metal. A tilting iron runner for feeding the hot metal to the hot metal ladle 5 is installed below the hot metal tip in the flowing direction of the hot metal, and is stopped at the receiving position 13 through this tilting iron. Hot metal is poured into the hot metal ladle 5 loaded on the hot metal ladle conveying device 1. After hot metal is poured into the hot metal ladle 5, the hot metal ladle transport device 1 moves to the preliminary processing position 15.

予備処理位置１５では、放熱防止蓋８が載置されていない溶銑鍋５の内部に収容されている溶銑に対して、脱燐処理や脱硫処理、除滓など溶銑予備処理が行われる。溶銑予備処理が終了した後には、溶銑鍋搬送装置１は、溶銑排出位置１１へ移動する。図２に示した実施形態は、予備処理位置１５を溶銑排出位置１１に近接して配置した場合の例について示したものであるが、予備処理位置１５の配置場所はこれには限定されず、受銑位置１３に近接して配置してもよい。   At the preliminary processing position 15, hot metal preliminary processing such as dephosphorization processing, desulfurization processing, and hot metal removal is performed on the hot metal accommodated inside the hot metal pan 5 on which the heat radiation prevention lid 8 is not placed. After the hot metal preliminary processing is completed, the hot metal ladle conveying device 1 moves to the hot metal discharge position 11. The embodiment shown in FIG. 2 shows an example in which the preliminary processing position 15 is arranged close to the hot metal discharge position 11, but the arrangement position of the preliminary processing position 15 is not limited to this, It may be arranged close to the receiving position 13.

上述した通り、溶銑排出位置１１では、溶銑鍋５に収容されている溶銑が、次工程の設備あるいは次工程の設備への装入用の溶銑鍋に排出されて、溶銑鍋５が空容器状態となり、溶銑鍋搬送装置１は空容器状態の溶銑鍋５を積載した後、放熱防止蓋載置位置１２へ移動する。   As described above, at the hot metal discharge position 11, the hot metal contained in the hot metal ladle 5 is discharged to the hot metal ladle for charging to the next process equipment or the next process equipment, and the hot metal ladle 5 is in an empty container state. Thus, the hot metal ladle conveying device 1 moves to the heat radiation prevention lid mounting position 12 after loading the hot metal ladle 5 in an empty container state.

このようにして、溶銑鍋５で溶銑を受銑して、この溶銑鍋５で溶銑に対して溶銑予備処理を行い、溶銑を排出し、再び溶銑を受銑する操業において、放熱防止蓋８を、溶銑の排出後であり溶銑を受銑する前の間の空容器状態の溶銑鍋５の開口部に載置することによって、空容器状態の溶銑鍋５からの放熱を防止することが可能となる。加えて、溶銑鍋搬送装置１が有する第１の台車４に配設される放熱防止蓋保持装置３に、受銑前に取り外す放熱防止蓋８を載置するので、放熱防止蓋載置位置１２や放熱防止蓋取外位置１４などに、放熱防止蓋８を一時的に保管する必要がない。
また、溶銑鍋搬送装置１を構成する台車に配設される放熱防止蓋保持装置３に放熱防止蓋８を保持して搬送しない場合には、受銑前に取り外した放熱防止蓋８を、何らかの手段によって放熱防止蓋載置位置１２まで搬送する必要がある。例えば、溶銑を収容した溶銑鍋５に、放熱防止蓋取外し位置１４で放熱防止蓋８を載置し、放熱防止蓋載置位置１２まで搬送することが考えられるが、溶銑鍋搬送装置１の移動経路が複雑なものとなり、放熱防止蓋取外位置１４および放熱防止蓋載置位置１２でのクレーンによる作業負荷も倍増するため、全ての溶銑鍋について実施することは困難である。本発明の実施形態では、溶銑鍋搬送装置１が有する第１の台車４に配設される放熱防止蓋保持装置３に、受銑前に取り外す放熱防止蓋８を載置するので、このような問題が無く、全ての溶銑鍋について実施することが可能となる。In this way, the hot metal is received in the hot metal ladle 5, the hot metal pretreatment is performed on the hot metal in the hot metal ladle 5, the hot metal is discharged, and in the operation of receiving the hot metal again, the heat radiation prevention lid 8 is provided. It is possible to prevent heat dissipation from the empty container ladle 5 by placing it on the opening of the empty container ladle 5 after the hot metal is discharged and before the hot metal is received. Become. In addition, since the heat radiation prevention lid 8 to be removed before receiving is placed on the heat radiation prevention lid holding device 3 disposed on the first carriage 4 of the hot metal ladle transport device 1, the heat radiation prevention lid placement position 12. There is no need to temporarily store the heat radiation prevention lid 8 at the heat radiation prevention lid removal position 14 or the like.
In addition, when the heat dissipation prevention lid holding device 3 disposed on the carriage constituting the hot metal ladle transporting device 1 is not transported by holding the heat dissipation prevention lid 8, the heat dissipation prevention lid 8 removed before receiving the iron It is necessary to convey to the heat radiation prevention lid mounting position 12 by means. For example, it is conceivable to place the heat radiation prevention lid 8 on the hot metal ladle 5 containing the hot metal at the heat radiation prevention lid removal position 14 and convey it to the heat radiation prevention lid placement position 12. Since the route becomes complicated and the work load by the crane at the heat radiation prevention lid removal position 14 and the heat radiation prevention lid placement position 12 is also doubled, it is difficult to carry out with respect to all the hot metal ladle. In the embodiment of the present invention, since the heat dissipation prevention lid 8 to be removed before receiving is placed on the heat dissipation prevention lid holding device 3 disposed in the first carriage 4 of the hot metal ladle transport device 1, There is no problem and it can be carried out for all hot metal ladle.

図２に示す実施形態では、放熱防止蓋載置位置１２と放熱防止蓋取外位置１４とは、溶銑排出位置１１と受銑位置１３と予備処理位置１５とは別の位置である。しかしながら、この実施形態に限られず、クレーン（放熱防止蓋載置装置及び放熱防止蓋取外装置）１６、１８を、溶銑排出位置１１と受銑位置１３と予備処理位置１５との位置のうちの少なくとも１つ以上に設けて、製鉄所内の設備を集約してもよい。また、放熱防止蓋載置位置１２を、溶銑排出位置１１と予備処理位置１５と同じ位置としてもよく、放熱防止蓋取外位置１４を、受銑位置１３と予備処理位置１５と同じ位置としてもよい。このようにしても、製鉄所内の設備を集約することが可能となる。   In the embodiment shown in FIG. 2, the heat radiation prevention lid placement position 12 and the heat radiation prevention lid removal position 14 are different from the hot metal discharge position 11, the receiving position 13, and the pretreatment position 15. However, the present invention is not limited to this embodiment, and the cranes (heat radiation prevention lid placing device and heat radiation prevention lid removing device) 16 and 18 can be connected to the hot metal discharge position 11, the receiving position 13, and the preliminary processing position 15. You may provide in at least 1 or more and integrate the facilities in a steelworks. Further, the heat radiation prevention lid placement position 12 may be the same position as the hot metal discharge position 11 and the preliminary processing position 15, and the heat radiation prevention lid removal position 14 may be the same position as the receiving position 13 and the preliminary processing position 15. Good. Even in this way, it becomes possible to consolidate the facilities in the steelworks.

放熱防止蓋載置位置１２は溶銑排出位置１１に近接することが好ましい。溶銑鍋５の保熱のため、溶銑鍋５への放熱防止蓋８を載置するタイミングは、溶銑の排出終了時からできるだけ早い方がよい。また、放熱防止蓋取外位置１４は受銑位置１３に近接することが好ましい。溶銑鍋５の保熱のため、溶銑鍋５の受銑のタイミングは、放熱防止蓋８が溶銑鍋５から取り外されてからできるだけ早い方がよい。   It is preferable that the heat radiation prevention lid placement position 12 is close to the hot metal discharge position 11. In order to keep the hot metal ladle 5 warm, the timing for placing the heat radiation prevention lid 8 on the hot metal ladle 5 should be as early as possible from the end of the hot metal discharge. Moreover, it is preferable that the heat radiation prevention lid removing position 14 is close to the receiving position 13. In order to keep the hot metal ladle 5 warm, the timing of receiving the hot metal ladle 5 should be as early as possible after the heat radiation prevention lid 8 is removed from the hot metal ladle 5.

図１に示す溶銑鍋搬送装置１を、図２に示すレール上で移動させて、溶銑排出位置１１と受銑位置１３との間を往復させて、溶銑を排出し、高炉から溶銑を受銑し、次いで、予備処理位置に移動する操業を行った。図３及び図４に示すように、放熱防止蓋保持装置３に保持される放熱防止蓋８を空容器状態の溶銑鍋５の開口部に載置し、及び、溶銑鍋５から放熱防止蓋８を取り外して放熱防止蓋保持装置３に載置した。   The hot metal ladle conveying device 1 shown in FIG. 1 is moved on the rail shown in FIG. 2 to reciprocate between the hot metal discharge position 11 and the hot metal receiving position 13 to discharge the hot metal and receive hot metal from the blast furnace. Then, the operation of moving to the pretreatment position was performed. As shown in FIGS. 3 and 4, the heat radiation prevention lid 8 held by the heat radiation prevention lid holding device 3 is placed on the opening of the hot metal ladle 5 in an empty container state, and the heat radiation prevention lid 8 is removed from the hot metal ladle 5. Was removed and placed on the heat dissipation prevention lid holding device 3.

溶銑鍋５は、３００トンの溶銑を収容するサイズを有しており、溶銑鍋搬送装置１や放熱防止蓋８などもその溶銑鍋５のサイズに順ずるサイズを有している。   The hot metal ladle 5 has a size that accommodates 300 tons of hot metal, and the hot metal ladle transport device 1, the heat radiation prevention lid 8, and the like have a size that conforms to the size of the hot metal ladle 5.

溶銑予備処理後に溶銑鍋搬送装置１を溶銑排出位置１１に移動し、溶銑鍋５に収容している溶銑を排出して、この溶銑鍋５を空容器状態とした。溶銑鍋搬送装置１は、放熱防止蓋載置位置１２に移動し、この放熱防止蓋載置位置１２で、放熱防止蓋保持装置３に載置されている放熱防止蓋８を取り外し、かつ、空容器状態の溶銑鍋５の開口部に放熱防止蓋８を載置した。溶銑鍋５から溶銑を排出してから、放熱防止蓋８を放熱防止保持装置３から取り外し、溶銑鍋５に載置するまでは５分以内に行った。その後、溶銑鍋搬送装置１は、放熱防止蓋取外位置１４に移動し、受銑位置１３で溶銑鍋５に受銑可能となるタイミング及び受銑位置１３へ移動する時間を考慮した上の可能な限りの長い時間、放熱防止蓋取外位置１４で待機した。受銑位置１３へ移動するタイミング直前に、載置される放熱防止蓋８を溶銑鍋５から取り外しかつこの取り外した放熱防止蓋１を放熱防止蓋保持装置３に載置した。   After the hot metal preliminary treatment, the hot metal ladle conveying device 1 was moved to the hot metal discharge position 11 to discharge the hot metal contained in the hot metal ladle 5, and the hot metal ladle 5 was made into an empty container state. The hot metal ladle transport device 1 moves to the heat radiation prevention lid placement position 12, and at this heat radiation prevention lid placement position 12, the heat radiation prevention lid 8 placed on the heat radiation prevention lid holding device 3 is removed and empty. A heat radiation prevention lid 8 was placed in the opening of the hot metal ladle 5 in the container state. After discharging the hot metal from the hot metal ladle 5, it took less than 5 minutes to remove the heat radiation prevention lid 8 from the heat radiation prevention holding device 3 and place it on the hot metal ladle 5. After that, the hot metal ladle transport device 1 moves to the heat radiation prevention lid removal position 14, and it is possible to take into account the timing at which the hot metal ladle 5 can be received at the receiving position 13 and the time to move to the hot pot position 13. It waited at the heat radiation prevention lid removal position 14 for as long as possible. Immediately before the timing of moving to the receiving position 13, the placed heat radiation prevention lid 8 was removed from the hot metal pan 5, and the removed heat radiation prevention lid 1 was placed on the heat radiation prevention lid holding device 3.

次いで、溶銑鍋搬送装置１を受銑位置に移動させて、空容器状態の溶銑鍋５を受銑位置１３に移動し、高炉から約１５００℃の溶銑を３００トン収容した。放熱防止蓋８を溶銑鍋５から取り外してから放熱防止蓋保持装置３に載置し、高炉から溶銑を受銑開始するまでは、５分以内に行った。溶銑を溶銑鍋５に収容した後に、溶銑鍋搬送装置１を予備処理位置１５へ移動させた。   Next, the hot metal ladle conveying device 1 was moved to the receiving position, the empty hot metal ladle 5 was moved to the receiving position 13, and 300 tons of hot metal at about 1500 ° C. was accommodated from the blast furnace. After removing the heat radiation prevention lid 8 from the hot metal ladle 5, the heat radiation prevention lid 8 was placed on the heat radiation prevention lid holding device 3 and was started within 5 minutes from the start of receiving hot metal from the blast furnace. After the hot metal was accommodated in the hot metal ladle 5, the hot metal ladle transport device 1 was moved to the preliminary processing position 15.

以上のように、溶銑鍋５に収容される溶銑を排出した後に空容器状態となる溶銑鍋５の開口部に放熱防止蓋８を載置して、空容器状態の溶銑鍋５を保熱した。   As described above, after the hot metal contained in the hot metal ladle 5 is discharged, the heat radiation prevention lid 8 is placed on the opening of the hot metal ladle 5 that becomes an empty container state, and the hot metal ladle 5 in the empty container state is kept warm. .

また、溶銑の排出から溶銑の受銑開始までの時間が、５０〜１２０分となる操業を複数回行った。このようにして、溶銑の排出から溶銑の受銑開始までの間に、空容器状態の溶銑鍋５を保熱した操業を本発明例する。また、放熱防止蓋８を用いないで溶銑鍋５からの放熱を特に防止せずに、本発明例と同様の時間で溶銑の排出から溶銑の受銑を行った操業を比較例とする。
＜本発明例と比較例との評価＞
放熱防止蓋８を用いたことによる、空容器状態の溶銑鍋５の保熱効果を確認するために、複数回の操業のうち、溶銑の排出から溶銑の受銑開始までの時間が１２０分となる操業において、本発明例と比較例ともに、溶銑の排出終了からの経過時間及び溶銑鍋５の内張り耐火物の表面温度を測定した。図５は、本発明例と比較例とにおける、溶銑の排出終了からの経過時間と溶銑鍋の内張り耐火物の表面温度との関係を示すグラフである。図５のグラフ中の横軸の「経過時間」は、溶銑の排出終了からの経過時間を示す。縦軸の「溶銑鍋耐火物温度」は、経過時間における、空容器状態の溶銑鍋の内張り耐火物の表面温度を示している。図５のグラフ中の破線は、本発明例における内張り耐火物の表面温度を示し、点線は、比較例における内張り耐火物の表面温度を示す。溶銑鍋５の内張り耐火物の表面温度は、放射温度計で測定した。溶銑鍋５の高さの中心部分に位置する内張り耐火物の表面温度を、溶銑鍋５の耐火物の温度の代表値として測定した。Moreover, the operation in which the time from hot metal discharge to the start of hot metal reception was 50 to 120 minutes was performed a plurality of times. In this manner, an example of the present invention is described in which the hot metal ladle 5 in an empty container state is kept warm from the hot metal discharge to the start of hot metal reception. Further, a comparative example is an operation in which hot metal is discharged and hot metal is received in the same time as the present invention without particularly preventing heat dissipation from the hot metal ladle 5 without using the heat dissipation prevention lid 8.
<Evaluation of Invention Examples and Comparative Examples>
In order to confirm the heat retention effect of the hot metal ladle 5 in the empty container state by using the heat radiation prevention lid 8, the time from the hot metal discharge to the start of the hot metal reception is 120 minutes in a plurality of operations. In the operation which becomes, in the example of the present invention and the comparative example, the elapsed time from the end of the hot metal discharge and the surface temperature of the refractory lining the hot metal ladle 5 were measured. FIG. 5 is a graph showing the relationship between the elapsed time from the end of hot metal discharge and the surface temperature of the refractory lining the hot metal ladle in the inventive example and the comparative example. The “elapsed time” on the horizontal axis in the graph of FIG. 5 indicates the elapsed time from the end of hot metal discharge. The “hot metal ladle refractory temperature” on the vertical axis indicates the surface temperature of the lining refractory of the hot metal ladle in an empty container during the elapsed time. The broken line in the graph of FIG. 5 shows the surface temperature of the lining refractory in the example of the present invention, and the dotted line shows the surface temperature of the lining refractory in the comparative example. The surface temperature of the lining refractory of the hot metal ladle 5 was measured with a radiation thermometer. The surface temperature of the lining refractory located at the center of the hot metal ladle 5 height was measured as a representative value of the temperature of the refractory in the hot metal ladle 5.

図５のグラフにおいて、経過時間が１００分の点では、本発明例では、溶銑鍋内張り耐火物の表面温度は８２０℃であった。一方、比較例では、溶銑鍋内張り耐火物の表面温度は６９０℃であった。放熱防止蓋８を用いることにより、空容器状態の溶銑鍋５の保熱を行った本発明例では、比較例に比べて、溶銑鍋耐火物の温度低下が抑えられていることが明らかである。   In the graph of FIG. 5, the surface temperature of the hot metal lath lining refractory was 820 ° C. in the example of the present invention at an elapsed time of 100 minutes. On the other hand, in the comparative example, the surface temperature of the hot metal ladle lining refractory was 690 ° C. By using the heat radiation prevention lid 8, it is clear that the temperature drop of the hot metal ladle refractory is suppressed in the example of the present invention in which the hot metal ladle 5 in the empty container state is kept in heat compared with the comparative example. .

また、複数回の操業のうち、溶銑の排出から溶銑の受銑開始までの時間が５４分となる操業において、本発明例と比較例ともに、予備処理位置に到着後（受銑終了から２０分後）の溶銑鍋５の溶銑の温度を熱電対で測定した。図６の縦軸の「溶銑温度低下」は、受銑終了から予備処理位置に到着した直後の溶銑の温度低下量を示す。   In addition, in the operation in which the time from hot metal discharge to hot metal reception start is 54 minutes among the multiple operations, both the present invention example and the comparative example have arrived at the preliminary processing position (20 minutes from the end of the hot metal reception). The temperature of the hot metal in the hot metal ladle 5 of the latter was measured with a thermocouple. “Hot metal temperature drop” on the vertical axis in FIG. 6 indicates the temperature drop amount of the hot metal immediately after arriving at the preliminary processing position from the end of receiving.

放熱防止蓋８を用いて空容器状態の溶銑鍋５を４６分間保熱した本発明例では溶銑温度低下が１９℃であったのに対し、放熱防止蓋８を用いないで溶銑鍋５からの放熱を特に防止しなかった比較例の溶銑温度低下が５６℃であることから、溶銑温度低下幅の差３７℃が放熱防止蓋８を用いた４６分間の効果であると言える。すなわち、本発明による熱ロス低減効果の溶銑温度換算値は０．８０℃／分と試算された。   In the example of the present invention in which the hot metal ladle 5 in an empty container was kept for 46 minutes using the heat radiation prevention lid 8, the temperature drop of the hot metal was 19 ° C., but without using the heat radiation prevention lid 8, Since the hot metal temperature drop in the comparative example in which heat dissipation was not particularly prevented is 56 ° C., it can be said that the difference 37 ° C. in the hot metal temperature drop width is the effect of 46 minutes using the heat radiation prevention lid 8. That is, the hot metal temperature conversion value of the heat loss reduction effect according to the present invention was estimated as 0.80 ° C./min.

図５及び図６からわかるように、溶銑の排出終了から受銑位置に到着するまでの溶銑鍋５が空容器状態となっている時間において、放熱防止蓋８を溶銑鍋５に載置することによって、溶銑の排出終了から受銑直前までの溶銑鍋５の内部の耐火物の温度低下を抑えることが可能であり、かつ、受銑終了後から溶銑鍋が予備処理位置に到着するまでの間の溶銑の温度低下を抑えることが可能であることがわかった。   As can be seen from FIGS. 5 and 6, the heat radiation prevention lid 8 is placed on the hot metal ladle 5 during the time when the hot metal ladle 5 is in an empty container state from the end of the hot metal discharge until it arrives at the receiving position. By this, it is possible to suppress the temperature drop of the refractory inside the hot metal ladle 5 from the end of hot metal discharge to just before receiving hot metal, and after the hot metal pan arrives at the pretreatment position. It was found that the temperature drop of the hot metal can be suppressed.

また、図５及び図６を考慮すると、本発明を適用すれば、溶銑の排出から溶銑の受銑開始までの時間が５０〜１２０分であり、溶銑の排出から放熱防止蓋８が溶銑鍋５に載置されるまでの時間、及び放熱防止蓋８が溶銑鍋５から取り外されてから受銑開始までの時間の合計が１０分である場合、本発明を適用した溶銑鍋の搬送方法では、溶銑鍋５に放熱防止蓋８を載置しない従来の溶銑鍋の搬送方法と比べると、溶銑鍋５が空容器状態である時間の８０〜９２％の間、放熱防止蓋を溶銑鍋上に載置することが可能である。そうなれば、転炉に装入する溶銑の温度を、放熱防止蓋を空容器状態の溶銑鍋に載置しない比較例と比べて、２５〜９０℃上昇させることが可能となる。溶銑の温度低下を防止することによって、低下した溶銑温度を回復するのに使用する土状黒鉛の使用量を５〜２０ｋｇ／溶銑トン削減できた。   5 and 6, if the present invention is applied, the time from hot metal discharge to hot metal receiving start is 50 to 120 minutes, and the heat radiation prevention lid 8 is provided from the hot metal discharge to the hot metal ladle 5. When the total time from when the heat-dissipation prevention lid 8 is removed from the hot metal ladle 5 to when the hot metal starts is 10 minutes, in the hot metal ladle transport method to which the present invention is applied, Compared to the conventional method of transporting the hot metal ladle 8 where the heat dissipation prevention lid 8 is not placed on the hot metal ladle 5, the heat dissipation prevention lid is placed on the hot metal ladle for 80 to 92% of the time when the hot metal ladle 5 is in an empty container state Can be placed. If it becomes so, it will become possible to raise the temperature of the hot metal charged to a converter 25-90 degreeC compared with the comparative example which does not mount a heat dissipation prevention lid | cover in the hot metal ladle of an empty container state. By preventing the temperature drop of the hot metal, the amount of earth graphite used to recover the lowered hot metal temperature could be reduced by 5 to 20 kg / ton of hot metal.

１ 溶銑鍋搬送装置
２ 機関車
３ 放熱防止蓋保持装置
４ 第１の台車
５ 溶銑鍋
６ 第２の台車
７ レール
８ 放熱防止蓋
９ 突起物
１０ 枠
１１ 溶銑排出位置
１２ 放熱防止蓋載置位置
１３ 受銑位置
１４ 放熱防止蓋取外位置
１５ 予備処理位置
１６ クレーン
１７ フック
１８ クレーン
１９ フック
２１ 耐熱部材DESCRIPTION OF SYMBOLS 1 Hot metal ladle conveyance apparatus 2 Locomotive 3 Heat radiation prevention lid holding device 4 1st cart 5 Hot metal ladle 6 2nd cart 7 Rail 8 Heat radiation prevention lid 9 Protrusion 10 Frame 11 Hot metal discharge position 12 Heat radiation prevention lid mounting position 13 Receiving position 14 Heat radiation prevention lid removal position 15 Pretreatment position 16 Crane 17 Hook 18 Crane 19 Hook 21 Heat resistant member

Claims (4)

高炉からの溶銑を受銑する受銑位置と、該溶銑を排出する溶銑排出位置との間を往復し、溶銑鍋が積載される溶銑鍋搬送装置であって、
前記溶銑鍋の開口部に載置される放熱防止蓋を保持する放熱防止蓋保持装置と、
前記溶銑鍋と前記放熱防止蓋保持装置とが配設される台車と、
を有する溶銑鍋搬送装置。
It is a hot metal ladle transporting device that reciprocates between a receiving position for receiving hot metal from a blast furnace and a hot metal discharging position for discharging the hot metal,
A heat dissipation prevention lid holding device that holds a heat dissipation prevention lid placed on the opening of the hot metal pan,
A carriage on which the hot metal ladle and the heat dissipation prevention lid holding device are disposed;
Hot metal ladle conveying device having
高炉からの溶銑を受銑する受銑位置と、該溶銑を排出する溶銑排出位置との間を往復し、溶銑鍋が積載される溶銑鍋搬送装置であって、
前記溶銑鍋の開口部に載置される放熱防止蓋を保持する放熱防止蓋保持装置と、
前記放熱防止蓋保持装置が配設される第１の台車と、
前記溶銑鍋が配設される第２の台車と、
を有する溶銑鍋搬送装置。
It is a hot metal ladle transporting device that reciprocates between a receiving position for receiving hot metal from a blast furnace and a hot metal discharging position for discharging the hot metal,
A heat dissipation prevention lid holding device that holds a heat dissipation prevention lid placed on the opening of the hot metal pan,
A first carriage on which the heat dissipation prevention lid holding device is disposed;
A second carriage on which the hot metal pan is disposed;
Hot metal ladle conveying device having
前記放熱防止蓋保持装置は、前記放熱防止蓋の動きを規制する枠を有する請求項１または２に記載の溶銑鍋搬送装置。
The hot metal ladle transport device according to claim 1, wherein the heat dissipation prevention lid holding device has a frame that restricts movement of the heat dissipation prevention lid.
請求項１または２に記載の溶銑鍋搬送装置を用いた溶銑鍋の搬送方法であって、
溶銑排出位置で、前記溶銑鍋に収容されている溶銑を排出し、
前記放熱防止蓋保持装置に保持される放熱防止蓋を、放熱防止蓋載置装置を用いて溶銑が排出された溶銑鍋の開口部に載置し、
前記溶銑鍋搬送装置を、受銑位置または該受銑位置に近接した放熱防止蓋取外位置へ移動し、
前記溶銑鍋の上に載置される放熱防止蓋を、放熱防止蓋取外装置を用いて、前記溶銑鍋から取り外し、該取り外された放熱防止蓋を放熱防止蓋保持装置に載置し、
次いで、前記溶銑鍋で受銑する、
溶銑鍋の搬送方法。A hot metal ladle transport method using the hot metal ladle transport device according to claim 1, wherein:
At the hot metal discharge position, discharge the hot metal contained in the hot metal ladle,
The heat radiation prevention lid held by the heat radiation prevention lid holding device is placed on the opening of the hot metal ladle from which the hot metal has been discharged using the heat radiation prevention lid placing device,
Move the hot metal ladle conveying device to a receiving position or a heat radiation prevention lid removing position close to the receiving position,
The heat radiation prevention lid placed on the hot metal pan is removed from the hot metal pan using the heat radiation prevention lid removing device, and the removed heat radiation prevention lid is placed on the heat radiation prevention lid holding device,
Next, receive it in the hot metal pan,
Conveying method of hot metal ladle.
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