JP4984493B2 - Blast furnace demolition method and blast furnace construction method - Google Patents

Blast furnace demolition method and blast furnace construction method Download PDF

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JP4984493B2
JP4984493B2 JP2005319971A JP2005319971A JP4984493B2 JP 4984493 B2 JP4984493 B2 JP 4984493B2 JP 2005319971 A JP2005319971 A JP 2005319971A JP 2005319971 A JP2005319971 A JP 2005319971A JP 4984493 B2 JP4984493 B2 JP 4984493B2
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furnace
blast furnace
furnace body
block
blast
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JP2007126708A (en
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昌男 藤田
隆弘 久米田
啓孝 小島
和也 野田
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JFE Steel Corp
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本発明は、高炉の解体工事や建設工事の工期短縮と安全性向上を可能にする高炉解体方法および高炉建設方法に関するものである。   The present invention relates to a blast furnace demolition method and a blast furnace construction method that can shorten the work period and improve safety of blast furnace demolition work and construction work.

高炉の解体を行なう際には、高炉が設置されている高炉基礎（いわゆるケーソン）とは異なる場所に作業場（以下、解体場という）を設け、高炉基礎上でリング状の炉体ブロックに分割した高炉炉体を解体場へ搬送して解体する（たとえば特許文献１参照）。高炉炉体をリング状の炉体ブロックに分割して解体する工法（以下、ブロック解体工法という）の従来の手順について、図５，６，７を参照して以下に説明する。なお図５，６，７では、高炉炉体を５個の炉体ブロックＡ〜Ｅに分割する例を示す。   When dismantling the blast furnace, a work site (hereinafter referred to as a dismantling site) was set up in a place different from the blast furnace foundation (so-called caisson) where the blast furnace is installed, and the blast furnace was divided into ring-shaped furnace blocks on the blast furnace foundation. A blast furnace furnace body is conveyed to a demolition site and disassembled (see, for example, Patent Document 1). A conventional procedure for a method of disassembling a blast furnace body divided into ring-shaped furnace body blocks (hereinafter referred to as a block dismantling method) will be described below with reference to FIGS. 5, 6 and 7 show an example in which a blast furnace furnace body is divided into five furnace body blocks A to E.

高炉炉体の炉頂上方には炉頂設備14等の種々の設備（以下、炉頂構造体という）が配設されている。図５に示すように、高炉の解体にあたって、まず、炉頂構造体14を高炉炉体から取り外すとともに10ブロック程度に分割し、高炉基礎６上でアウトリガークレーン13によって吊り上げて高炉本体脇へ移送し、次いで小ブロックに分割された炉頂構造体14を下降させた後、トレーラー等の輸送台車（図示せず）に移載して解体場へ搬送する。   Various facilities (hereinafter referred to as a “furnace top structure”) such as a furnace top facility 14 are disposed above the top of the blast furnace body. As shown in FIG. 5, when dismantling the blast furnace, first, the furnace top structure 14 is removed from the blast furnace body and divided into about 10 blocks. Then, after the furnace top structure 14 divided into small blocks is lowered, it is transferred to a transport cart (not shown) such as a trailer and transported to a demolition site.

このようにして炉頂構造体を搬出する作業と並行して、高炉炉体の炉底部をリング状に切断する。リング状に切断した炉底部を炉体ブロックＥとする。次いで、炉体支持柱１に配設される吊り上げ装置2a，2bから垂下したワイヤロープ10，11の下端を、それぞれ吊り部材9a，9bに連結する。そして吊り上げ装置2a，2bを稼動してワイヤロープ10，11を牽引することによって、図６に示すように、上段に位置する高炉炉体（すなわち炉体ブロックＡ〜Ｄ）を吊り上げ、炉体ブロックＥは高炉基礎６上にリフトダウンされ、高炉基礎６上に敷設されたレール上の支持ブロック４を介して水平移動可能にした移動台３の上に載置される。さらに高炉基礎６のレベルに合わせて積載レベル調整架構をセットした炉体輸送台車５に移載し、炉体輸送台車５で解体場へ搬送する。   In this way, in parallel with the work of carrying out the furnace top structure, the furnace bottom of the blast furnace body is cut into a ring shape. The furnace bottom section cut into a ring shape is referred to as a furnace block E. Next, the lower ends of the wire ropes 10 and 11 suspended from the lifting devices 2a and 2b disposed on the furnace support column 1 are connected to the suspension members 9a and 9b, respectively. Then, by operating the lifting devices 2a and 2b and pulling the wire ropes 10 and 11, as shown in FIG. 6, the upper blast furnace body (that is, the furnace body blocks A to D) is lifted, and the furnace body block E is lifted down on the blast furnace foundation 6 and placed on a moving table 3 that is horizontally movable via a support block 4 on a rail laid on the blast furnace foundation 6. Further, it is transferred to the furnace body transport cart 5 in which the loading level adjusting frame is set in accordance with the level of the blast furnace foundation 6 and is transported to the demolition site by the furnace body transport cart 5.

一方、高炉基礎６上では炉体ブロックＡ〜Ｄからなる高炉炉体を降下させ、高炉基礎６上でリング状の炉体ブロックＤを切断する。次に、上段に位置する高炉炉体（すなわち炉体ブロックＡ〜Ｃ）を吊り上げ、さらに炉体ブロックＤも炉体ブロックＥと同様にを高炉基礎６上から積載レベル調整架構をセットした炉体輸送台車５に移載し、解体場へ搬送する。   On the other hand, on the blast furnace foundation 6, the blast furnace body composed of the furnace body blocks A to D is lowered, and the ring-shaped furnace body block D is cut on the blast furnace foundation 6. Next, the blast furnace furnace body (that is, furnace body blocks A to C) located in the upper stage is lifted, and the furnace body block D is the same as the furnace body block E, and a furnace body in which a loading level adjusting frame is set from above the blast furnace base 6. Transfer to the transport cart 5 and transport to the demolition site.

このようにして、順次、高炉基礎６上から炉体ブロックを搬出して、解体場へ搬送する。なお図７は、炉頂部の炉体ブロックＡを吊り上げて、炉体ブロックＢを高炉基礎６上から炉体輸送台車５へ移載した状態を示す。
以上に説明した通り、従来のブロック解体工法では、高炉基礎６上から搬出した炉体ブロックＡ〜Ｅを解体場で解体する。したがって高炉基礎６上で高炉炉体を解体する工法に比べて、工期を短縮することが可能である。しかしながら図５に示すような炉頂設備14等の炉頂構造体をアウトリガークレーン13で吊り上げる作業は、高所で行なわれるので、作業員の安全を確保するための装備を使用し、しかも安全を確認しながら作業を行なう必要がある。また、炉頂構造体を小さく分割して吊り上げる必要があるため、吊り上げ回数が増加し、搬出作業に長時間を要する。 In this way, the furnace block is sequentially carried out from the blast furnace foundation 6 and conveyed to the demolition site. FIG. 7 shows a state in which the furnace block A at the top of the furnace is lifted and the furnace block B is transferred from the blast furnace foundation 6 to the furnace transport carriage 5.
As explained above, in the conventional block dismantling method, the furnace block A to E carried out from the blast furnace foundation 6 is dismantled at the dismantling site. Therefore, it is possible to shorten the construction period compared to the method of dismantling the blast furnace body on the blast furnace foundation 6. However, since the work of lifting the furnace top structure such as the furnace top equipment 14 as shown in FIG. 5 with the outrigger crane 13 is performed at a high place, equipment for ensuring the safety of workers is used and safety is ensured. It is necessary to work while confirming. Moreover, since it is necessary to divide the furnace top structure into small parts and lift it, the number of times of lifting increases, and a long time is required for carrying out work.

さらに、炉頂構造体および炉体ブロックを高炉基礎６から移動台３を積荷レベル調整架構からレベルダウンして炉体輸送台車５へ移載する作業に長時間を要する。つまり従来のブロック解体工法は、安全性向上および工期短縮の観点から改善の余地が残されていた。
また、高炉の建設を行なう際には、高炉炉体の最上段に位置する炉体ブロックＡを地組場で製作し、炉体輸送台車５を用いて高炉基礎６の近傍へ搬送する。次いで、炉体ブロックＡを 炉体輸送台車５からレベル調整架構まで上昇させて移載して、高炉基礎６の直近まで移動させ、さらに移動台３に移載する。移動台３は炉体ブロックＡを所定の位置へ搬送して停止する。次に、吊り上げ装置2aから垂下したワイヤロープ10の下端を炉体ブロックＡに連結し、吊り上げ装置2aを稼動してワイヤロープを牽引することによって、炉体ブロックＡを吊り上げる（図７参照）。 Furthermore, it takes a long time to transfer the furnace top structure and the furnace body block from the blast furnace foundation 6 to the furnace body carriage 5 after moving the moving base 3 from the load level adjusting frame. That is, the conventional block dismantling method has room for improvement from the viewpoint of improving safety and shortening the construction period.
When constructing the blast furnace, the furnace block A located at the uppermost stage of the blast furnace furnace body is manufactured at the ground assembly site and transported to the vicinity of the blast furnace foundation 6 using the furnace body transport carriage 5. Next, the furnace block A is moved from the furnace transport carriage 5 to the level adjustment frame, transferred to the position close to the blast furnace foundation 6, and further transferred to the moving table 3. The moving table 3 transports the furnace block A to a predetermined position and stops. Next, the lower end of the wire rope 10 suspended from the lifting device 2a is connected to the furnace block A, and the lifting device 2a is operated to pull the wire rope, thereby lifting the furnace block A (see FIG. 7).

次に、炉体ブロックＡの下段に位置する炉体ブロックＢを移動台３に載置して、炉体ブロックＡの直下に誘導し、炉体ブロックＡと炉体ブロックＢの中心軸を一致させる。その後、炉体ブロックＡを降下させて、炉体ブロックＡと炉体ブロックＢを接合する。なお、地組場で製作した炉体ブロックＢを高炉基礎６上へ搬送する手順は、炉体ブロックＡの搬送手順と同じであるから説明を省略する。   Next, the furnace block B located at the lower stage of the furnace block A is placed on the moving table 3 and guided directly below the furnace block A, so that the central axes of the furnace block A and the furnace block B coincide with each other. Let Thereafter, the furnace body block A is lowered and the furnace body block A and the furnace body block B are joined. In addition, since the procedure which conveys the furnace block B manufactured in the ground assembly to the blast furnace foundation 6 is the same as the conveyance procedure of the furnace block A, description is abbreviate | omitted.

このようにして順次、炉体ブロックＡ〜Ｅを高炉基礎６上で接合し、炉頂構造体をアウトリガークレーン13で吊り上げて（図５参照）、高炉の炉頂部に設置する。
以上に説明した従来の高炉建設方法では、図５に示すような炉頂設備14等の炉頂構造体をアウトリガークレーン13で吊り上げる作業が高所で行なわれるので、作業員の安全を確保するための装備を使用し、しかも安全を確認しながら作業を行なう必要がある。そのため、炉頂構造体をアウトリガークレーン13で吊り上げる作業は、複数のブロックに分割して吊り上げる作業を高所で行なうので、長時間を要する。 In this way, the furnace body blocks A to E are sequentially joined on the blast furnace foundation 6, the furnace top structure is lifted by the outrigger crane 13 (see FIG. 5), and installed at the furnace top of the blast furnace.
In the conventional blast furnace construction method described above, the operation of lifting the furnace top structure such as the furnace top equipment 14 as shown in FIG. 5 with the outrigger crane 13 is performed at a high place, so that the safety of workers is ensured. It is necessary to work while using the equipment and confirming safety. For this reason, the work of lifting the furnace top structure with the outrigger crane 13 takes a long time because the work of lifting it by dividing it into a plurality of blocks is performed at a high place.

さらに、炉頂構造体および炉体ブロックを地組場から炉体輸送台車５，移動台３での搬送する作業や積荷レベル調整作業に長時間を要する。つまり従来のブロック解体工法は、安全性向上および工期短縮の観点から改善の余地が残されていた。
特開2000-282116 号公報 Furthermore, it takes a long time to carry the furnace top structure and the furnace body block from the ground assembly site on the furnace body transportation cart 5 and the moving table 3 and the load level adjustment work. That is, the conventional block dismantling method has room for improvement from the viewpoint of improving safety and shortening the construction period.
JP 2000-282116 A

本発明は上記のような問題を解消し、高炉の解体工事や建設工事の工期短縮と安全性向上を可能にする高炉解体方法および高炉建設方法を提供することを目的とする。   An object of the present invention is to provide a blast furnace demolition method and a blast furnace construction method that can solve the above-described problems and can shorten the work period and improve safety of blast furnace demolition work and construction work.

本発明は、高炉炉体を炉頂構造体および２個以上のリング状の炉体ブロックに分割して炉体の解体を行なう高炉解体方法において、上段に位置する炉頂構造体および炉体ブロックを一体的に高炉基礎上で吊り上げて、最下段の炉体ブロックから順次、炉頂構造体および炉体ブロックを切断後、高炉基礎上の移動台により炉頂構造体および炉体ブロックを高炉基礎上面に載置し、高炉基礎のレベルに合わせて積載レベル調整架構をセットした炉体輸送台車に移載し、炉体輸送台車で解体場まで搬送する高炉解体方法である。 The present invention relates to a blast furnace demolition method in which a blast furnace furnace body is divided into a furnace top structure and two or more ring-shaped furnace body blocks, and the furnace body is disassembled. Are integrally lifted on the blast furnace foundation, and after cutting the furnace top structure and the furnace body block sequentially from the bottom furnace block, the furnace top structure and the furnace body block are moved to the blast furnace foundation by the moving platform on the blast furnace foundation. It is a blast furnace dismantling method that is placed on the upper surface, transferred to a furnace body transportation carriage having a loading level adjusting frame set in accordance with the level of the blast furnace foundation, and transported to the demolition site by the furnace body transportation carriage.

また本発明は、高炉炉体を炉頂構造体および２個以上のリング状の炉体ブロックに分割して炉体の解体を行なう高炉炉体解体方法において、炉頂構造体および炉体ブロックを輸送する路面から高炉基礎の上面まで傾斜路をバラスを用いて設け、上段に位置する炉頂構造体および炉体ブロックを一体的に高炉基礎上で吊り上げて、最下段の炉体ブロックから順次、炉頂構造体および炉体ブロックを切断後、炉体輸送台車に載置し、炉体輸送台車で解体場まで搬送する高炉解体方法である。 The present invention also relates to a blast furnace body disassembling method in which a blast furnace body is divided into a furnace top structure and two or more ring-shaped furnace body blocks to disassemble the furnace body. A ramp is provided from the road surface to be transported to the upper surface of the blast furnace foundation using a ballast, the furnace top structure and the furnace body block located on the upper stage are integrally lifted on the blast furnace foundation, and sequentially from the lowermost furnace block, This is a blast furnace dismantling method in which a furnace top structure and a furnace body block are cut, placed on a furnace body transporting carriage, and transported to a demolition site by the furnace body transporting carriage.

また本発明は、高炉炉体を炉頂構造体および２個以上のリング状のブロックに分割して炉体の組立てを行なう高炉炉体建設方法において、炉頂構造体および炉体ブロックを搬送する路面から高炉基礎の上面まで傾斜路をバラスを用いて設け、炉頂構造体および炉体ブロックを地組場で組立て後、地組場で炉体輸送台車に載置し、炉体輸送台車で高炉基礎まで搬送し、炉頂構造体を高炉基礎上で吊り上げて、次いで下段に位置する複数の炉体ブロックを順次、高炉基礎上に搬送し、互いに中心軸が一致するように移動台の位置を調整後、炉体ブロックを吊り上げ、しかる後に接合させて高炉を建設する高炉建設方法である。 The present invention also relates to a blast furnace furnace construction method in which a blast furnace furnace body is assembled by dividing the blast furnace furnace body into a furnace top structure and two or more ring-shaped blocks, and conveys the furnace top structure and the furnace body block. A ramp is provided from the road surface to the upper surface of the blast furnace foundation using a ballast, and after the furnace top structure and the furnace block are assembled at the assembly ground, they are placed on the furnace transportation carriage at the assembly ground. Transfer to the blast furnace foundation, lift the furnace top structure on the blast furnace foundation, and then sequentially transfer the multiple furnace blocks located on the lower stage to the blast furnace foundation, and position the moving platform so that the central axes coincide with each other This is a blast furnace construction method in which the furnace block is lifted after adjustment and then joined to construct a blast furnace.

本発明によれば、高炉の解体工事や建設工事の工期を短縮するとともに、安全性を向上できる。   ADVANTAGE OF THE INVENTION According to this invention, while shortening the construction period of a blast furnace demolition work or construction work, safety can be improved.

本発明の高炉解体方法は、ブロック解体工法を改善したものである。本発明の高炉解体方法について、図１，２を参照して、高炉炉体を５個の炉体ブロックＡ〜Ｅに分割する例を以下に説明する。ただし本発明の高炉解体方法は、炉体ブロックの個数を５個に限定するものではない。
本発明を適用して高炉を解体するにあたって、高炉炉体をリング状の炉体ブロックに分割して解体場へ搬送し、その解体場で解体する。その際、高炉基礎６上で高炉炉体の炉底部をリング状に切断して、炉体ブロックＥとする。次いで、炉体支持柱１に配設される吊り上げ装置2a，2b，2cから垂下したワイヤロープ10，11，12の下端を、それぞれ吊り部材9a，9b，9cに連結する。そして吊り上げ装置2a，2b，2cを稼動してワイヤロープ10，11，12を牽引することによって、図１に示すように、上段に位置する高炉炉体（すなわち炉体ブロックＡ〜Ｄ）と炉頂設備14等の炉頂構造体とを一体的に吊り上げる。ここでは高炉炉体と炉頂構造体とを炉体構造物と記す。 The blast furnace dismantling method of the present invention is an improvement of the block dismantling method. An example of dividing the blast furnace body into five furnace body blocks A to E will be described below with reference to FIGS. However, the blast furnace disassembly method of the present invention does not limit the number of furnace body blocks to five.
In dismantling the blast furnace by applying the present invention, the blast furnace furnace body is divided into ring-shaped furnace body blocks, conveyed to the dismantling field, and dismantled in the dismantling field. At that time, the furnace bottom of the blast furnace body is cut into a ring shape on the blast furnace foundation 6 to form a furnace body block E. Next, the lower ends of the wire ropes 10, 11 and 12 suspended from the lifting devices 2a, 2b and 2c disposed on the furnace support column 1 are connected to the suspension members 9a, 9b and 9c, respectively. Then, by operating the lifting devices 2a, 2b, and 2c and pulling the wire ropes 10, 11, and 12, as shown in FIG. 1, the blast furnace body (that is, the furnace body blocks A to D) and the furnace located in the upper stage The furnace top structure such as the top equipment 14 is integrally lifted. Here, the blast furnace furnace body and the furnace top structure are referred to as a furnace body structure.

なお、図１には３組（すなわち吊り上げ装置2a，吊り上げ装置2b，吊り上げ装置2c）の吊り上げ装置を使用する例を示したが、本発明では、炉体構造物の重量や吊り上げ装置の能力に応じて吊り上げ装置の台数を設定する。
吊り上げ装置2a，2b，2cで炉体構造物を吊り上げた後、炉体ブロックＥは高炉基礎６上にリフトダウンされ、高炉基礎６上に敷設されたレール上の支持ブロック４を介して水平移動可能に設置した移動台３の上に載置される。また、高炉基礎６のレベルに合わせて積載レベル調整架構をセットした炉体輸送台車５を高炉基礎部近傍に移動する。積載レベル調整架構にはレールが設けられ、高炉基礎６上のレールと接続する。次いで、接続されたレール上を炉体ブロックＥを載置した移動台３は水平移動され、炉体輸送台車５に移載される。こうして炉体ブロックＥは炉体輸送台車５により解体場へ搬送される。 Although FIG. 1 shows an example in which three sets of lifting devices (that is, lifting device 2a, lifting device 2b, lifting device 2c) are used, in the present invention, the weight of the furnace structure and the capacity of the lifting device are shown. Set the number of lifting devices accordingly.
After lifting the furnace structure with the lifting devices 2a, 2b, 2c, the furnace block E is lifted down on the blast furnace foundation 6 and moved horizontally via the support block 4 on the rail laid on the blast furnace foundation 6. It is placed on the movable table 3 that is installed. Further, the furnace body transport carriage 5 in which the loading level adjusting frame is set in accordance with the level of the blast furnace foundation 6 is moved to the vicinity of the blast furnace foundation. The loading level adjusting frame is provided with rails and is connected to the rails on the blast furnace foundation 6. Next, the moving table 3 on which the furnace block E is mounted on the connected rail is moved horizontally and transferred to the furnace transport cart 5. Thus, the furnace block E is transported to the demolition site by the furnace transport carriage 5.

一方、高炉基礎６上では炉体構造物を降下させ、高炉基礎６上でリング状の炉体ブロックＤを切断する。次に、上段に位置する炉体構造物を吊り上げ、さらに炉体ブロックＤを高炉基礎６上から積載レベル調整架構へ移載する。こうして炉体ブロックＤは、炉体輸送台車５の待機位置まで移動台３によって搬送された後、炉体輸送台車５へ炉体ブロックＤを移載され、解体場へ搬送される。   On the other hand, the furnace body structure is lowered on the blast furnace foundation 6, and the ring-shaped furnace body block D is cut on the blast furnace foundation 6. Next, the furnace body structure located in the upper stage is lifted, and the furnace body block D is transferred from the blast furnace foundation 6 to the loading level adjusting frame. Thus, after the furnace block D is transported to the standby position of the furnace transport truck 5 by the moving table 3, the furnace block D is transferred to the furnace transport truck 5 and transported to the demolition site.

このようにして、順次、高炉基礎６上から炉体ブロックを搬出して、解体場へ搬送する。なお図２は、炉頂部の炉体ブロックＡと炉頂構造体とを一体的に吊り上げて、炉体ブロックＢを高炉基礎６上から炉体輸送台車５へ移載した状態を示す。
さらに、炉体ブロックＡを高炉基礎６上から移動台３を経て炉体輸送台車５へ移載して解体場へ搬送した後、同様に炉頂構造体を炉体輸送台車５へ移載して解体場へ搬送する。 In this way, the furnace block is sequentially carried out from the blast furnace foundation 6 and conveyed to the demolition site. FIG. 2 shows a state in which the furnace block A and the furnace top structure at the top of the furnace are integrally lifted, and the furnace block B is transferred from the blast furnace foundation 6 to the furnace transport carriage 5.
Further, after transferring the furnace block A from the blast furnace base 6 to the furnace transport carriage 5 through the moving table 3 and transporting it to the demolition site, the furnace top structure is similarly transferred to the furnace transport truck 5. To the demolition site.

以上に説明した通り、本発明の高炉解体方法によれば、炉体ブロックの搬出に並行して炉頂設備14等の炉頂構造体をアウトリガークレーン13によってトレーラー等へ移載するという従来のブロック解体工法で慎重な作業が求められる高所作業を省略できるので、ブロック解体工法の安全性が向上するとともに、工期が短縮される。
炉体ブロックＡ〜Ｅおよび炉頂構造体を高炉基礎６上から炉体輸送台車５へ移載する手段は、特定の設備や装置に限定せず、従来から知られている手段（たとえばクレーン，台車等）が使用できる。ただし、クレーンを使用する場合は、各炉体ブロックおよび炉頂構造体に全て吊り具を装着しなければならないので、その装着に長時間を要する。工期を一層短縮するためには、高炉基礎６の上面を走行する台車を用いることが好ましい。 As described above, according to the blast furnace dismantling method of the present invention, a conventional block in which a furnace top structure such as the furnace top equipment 14 is transferred to a trailer or the like by the outrigger crane 13 in parallel with the carrying out of the furnace body block. Since the high place work that requires careful work in the dismantling method can be omitted, the safety of the block dismantling method is improved and the construction period is shortened.
The means for transferring the furnace body blocks A to E and the furnace top structure from the blast furnace foundation 6 to the furnace body transportation carriage 5 is not limited to a specific facility or apparatus, and conventionally known means (for example, a crane, Can be used. However, when a crane is used, since it is necessary to attach all the lifting tools to each furnace block and the top structure, it takes a long time to install the crane. In order to further shorten the construction period, it is preferable to use a cart that travels on the upper surface of the blast furnace foundation 6.

また図３，４に示すように移動台３，積載レベル調整架構をセットした炉体輸送台車５を使用せず、また、レールの接合も不要である、傾斜路15を設けることによって、炉体ブロックＡ〜Ｅおよび炉頂構造体を高炉基礎６の上面から解体場へ搬送することも可能である。その手順を、図３，４を参照して、高炉炉体を５個の炉体ブロックＡ〜Ｅに分割する例を以下に説明する。ただし本発明の高炉解体方法は、炉体ブロックの個数を５個に限定するものではない。   Further, as shown in FIGS. 3 and 4, the furnace body is not provided by using the ramp 15 that does not use the furnace body carriage 5 in which the movable table 3 and the loading level adjustment frame are set and does not require the joining of rails. It is also possible to transport the blocks A to E and the furnace top structure from the upper surface of the blast furnace foundation 6 to the demolition site. An example of dividing the blast furnace furnace into five furnace body blocks A to E will be described below with reference to FIGS. However, the blast furnace disassembly method of the present invention does not limit the number of furnace body blocks to five.

その場合、炉体輸送台車５が走行する路面から高炉基礎６（いわゆるケーソン）の上面まで傾斜路15を設ける。そして炉体輸送台車５を路面７から傾斜路15を経て高炉基礎６上まで移動させ、高炉基礎６上で待機させる。なお傾斜路15は、高炉の解体工事（あるいはその後の建設工事）が終了した後で取り除くので、バラス等を用いて簡便に設けることが好ましい。   In that case, the ramp 15 is provided from the road surface on which the furnace body transport carriage 5 travels to the upper surface of the blast furnace foundation 6 (so-called caisson). Then, the furnace body transport cart 5 is moved from the road surface 7 through the ramp 15 to the blast furnace foundation 6 and is put on standby on the blast furnace foundation 6. Since the ramp 15 is removed after the blast furnace dismantling work (or the subsequent construction work) is completed, it is preferable to provide the slope 15 simply by using a ballast or the like.

そして、高炉基礎６上で高炉炉体の炉底部をリング状に切断して、炉体ブロックＥとする。次いで、炉体支持柱１に配設される吊り上げ装置2a，2b，2cから垂下したワイヤロープ10，11，12の下端を、それぞれ吊り部材9a，9b，9cに連結する。そして吊り上げ装置2a，2b，2cを稼動してワイヤロープ10，11，12を巻き上げることによって、図１に示すように、上段に位置する高炉炉体（すなわち炉体ブロックＡ〜Ｄ）と炉頂設備14等の炉頂構造体とを一体的に吊り上げる。ここでは高炉炉体と炉頂構造体とを炉体構造物と記す。   Then, the furnace bottom of the blast furnace furnace body is cut into a ring shape on the blast furnace foundation 6 to obtain a furnace body block E. Next, the lower ends of the wire ropes 10, 11 and 12 suspended from the lifting devices 2a, 2b and 2c disposed on the furnace support column 1 are connected to the suspension members 9a, 9b and 9c, respectively. Then, the hoisting devices 2a, 2b, 2c are operated to wind up the wire ropes 10, 11, 12, and as shown in FIG. 1, the blast furnace furnace body (that is, the furnace body blocks A to D) located in the upper stage and the top of the furnace The furnace top structure such as the equipment 14 is lifted integrally. Here, the blast furnace furnace body and the furnace top structure are referred to as a furnace body structure.

なお、図３には３組（すなわち吊り上げ装置2a，吊り上げ装置2b，吊り上げ装置2c）の吊り上げ装置を使用する例を示したが、本発明では、炉体構造物の重量や吊り上げ装置の能力に応じて吊り上げ装置の台数を設定する。
吊り上げ装置2a，2b，2cで炉体構造物を吊り上げた後、炉体ブロックＥを高炉基礎６上から炉体輸送台車５へ移載する。こうして炉体輸送台車５は高炉基礎６上から傾斜路15を経て路面７を走行して炉体ブロックＥを解体場へ搬送し、炉体ブロックＥは解体場で解体される。 FIG. 3 shows an example in which three sets of lifting devices (that is, the lifting device 2a, the lifting device 2b, and the lifting device 2c) are used. However, in the present invention, the weight of the furnace structure and the capacity of the lifting device are shown. Set the number of lifting devices accordingly.
After the furnace body structure is lifted by the lifting devices 2a, 2b, and 2c, the furnace body block E is transferred from the blast furnace foundation 6 to the furnace body transport carriage 5. In this way, the furnace body transport carriage 5 travels on the road surface 7 via the ramp 15 from the blast furnace foundation 6 and transports the furnace block E to the demolition field, and the furnace block E is dismantled in the demolition field.

一方、高炉基礎６上では炉体構造物を降下させ、高炉基礎６上でリング状の炉体ブロックＤを切断する。次に、上段に位置する炉体構造物を吊り上げ、さらに炉体ブロックＤを高炉基礎６上から炉体輸送台車５へ移載する。こうして炉体輸送台車５は高炉基礎６上から傾斜路15を経て路面７を走行して炉体ブロックＤを解体場へ搬送し、炉体ブロックＤは解体場で解体される。   On the other hand, the furnace body structure is lowered on the blast furnace foundation 6, and the ring-shaped furnace body block D is cut on the blast furnace foundation 6. Next, the furnace body structure located in the upper stage is lifted, and the furnace body block D is transferred from the blast furnace foundation 6 to the furnace body transport carriage 5. Thus, the furnace body transport carriage 5 travels on the road surface 7 through the ramp 15 from the blast furnace foundation 6 and transports the furnace body block D to the dismantling field, and the furnace body block D is dismantled in the dismantling field.

このようにして、順次、高炉基礎６上から炉体ブロックを搬出して、解体場へ搬送する。なお図４は、炉頂部の炉体ブロックＡと炉頂構造体とを吊り上げ装置2a，2cで吊り上げて、炉体ブロックＢを高炉基礎６上から炉体輸送台車５へ移載した状態を示す。
さらに炉体ブロックＡを高炉基礎６上から炉体輸送台車５へ移載して解体場へ搬送した後、同様に炉頂構造体を炉体輸送台車５へ移載して解体場へ搬送する。 In this way, the furnace block is sequentially carried out from the blast furnace foundation 6 and conveyed to the demolition site. 4 shows a state in which the furnace block A and the furnace top structure at the furnace top are lifted by the lifting devices 2a and 2c, and the furnace block B is transferred from the blast furnace foundation 6 to the furnace transport carriage 5. .
Furthermore, after transferring the furnace block A from the blast furnace foundation 6 to the furnace transport carriage 5 and transporting it to the demolition field, the furnace top structure is similarly transferred to the furnace transport truck 5 and transported to the demolition field. .

以上に説明した通り、本発明の高炉解体方法によれば、高炉基礎６上からの移動台３，積載レベル調整架構をセットした炉体輸送台車５の移載やレール接合が必要な従来のブロック解体工法で行なっていた作業を省略できるので、ブロック解体工法の工期を短縮できる。また、炉頂設備14等の炉頂構造体を搬出する際に小さく分割する作業を省略できる。
また本発明の高炉解体方法の手順を逆に行なうことによって、高炉を建設することも可能である。つまり、炉体ブロックＡと炉頂構造体とを一体的に吊り上げて、図２に示すように、炉体ブロックＢを高炉基礎６上へ搬送し、炉体構造物を降下させて接合する。このようにして炉体ブロックＣ〜Ｅを順次接合することによって、図１に示すように高炉を建設できる。 As described above, according to the blast furnace dismantling method of the present invention, a conventional block that requires transfer of the furnace transport carriage 5 on which the moving base 3 and the load level adjusting frame are set from the blast furnace base 6 and rail joining is required. Since the work performed in the demolition method can be omitted, the construction period of the block demolition method can be shortened. Further, the work of dividing the furnace top structure such as the furnace top equipment 14 into small parts can be omitted.
It is also possible to construct a blast furnace by reversing the procedure of the blast furnace dismantling method of the present invention. That is, the furnace body block A and the furnace top structure are integrally lifted, and the furnace body block B is transported onto the blast furnace foundation 6 as shown in FIG. 2, and the furnace body structure is lowered and joined. By sequentially joining the furnace body blocks C to E in this way, a blast furnace can be constructed as shown in FIG.

図３，４に示すように本発明を適用し、高炉を５段に分割して解体した。すなわち、バラスを用いて傾斜路15を設け、高炉基礎６上で炉体輸送台車５を待機させ、炉体ブロックＡ〜Ｅおよび炉頂構造体を炉体輸送台車５に移載し、さらに解体場へ搬送した。これを発明例とする。
一方、従来は図５〜７に示すように、傾斜路15を設けず、移動台３，積載レベル調整架構をセットした炉体輸送台車５を使用していた。つまり、高炉炉体の分割と並行して、炉頂構造体をアウトリガークレーン13によってトレーラー等の輸送台車へ移載して解体場へ搬送した。並行して、各炉体ブロックを高炉基礎６上からレール接合を行ない、移動台３を経て積載レベル調整架構をセットした炉体輸送台車５を使用へ移載して解体場へ搬送した。これを従来例とする。 The present invention was applied as shown in FIGS. 3 and 4, and the blast furnace was divided into five stages and disassembled. That is, the ramp 15 is provided using the ballast, the furnace transport carriage 5 is made to stand by on the blast furnace foundation 6, the furnace block A to E and the top structure are transferred to the furnace transport carriage 5, and further dismantling It was transported to the field. This is an invention example.
On the other hand, conventionally, as shown in FIGS. 5 to 7, the furnace transport cart 5 in which the ramp 15 is not provided and the moving table 3 and the loading level adjusting frame are set is used. That is, in parallel with the division of the blast furnace furnace body, the furnace top structure was transferred to a transport carriage such as a trailer by the outrigger crane 13 and transferred to the demolition site. At the same time, each furnace block was rail-joined from the blast furnace foundation 6, and the furnace transport carriage 5 in which the loading level adjusting frame was set via the moving table 3 was transferred to use and transported to the demolition site. This is a conventional example.

発明例と従来例について、高炉の解体に要する工事期間を比べると、従来の工事期間（約70日）に対して発明例では工事期間が７日程度短縮された。しかも発明例では高所作業がなくなったので、解体工事の安全性が向上した。   When the construction period required for dismantling the blast furnace was compared between the inventive example and the conventional example, the construction period was shortened by about 7 days in the inventive example compared to the conventional construction period (about 70 days). In addition, in the inventive example, the work at high places is eliminated, so the safety of the dismantling work is improved.

本発明の高炉解体方法で炉体構造物を吊り上げた例を模式的に示す断面図である。It is sectional drawing which shows typically the example which lifted the furnace structure by the blast furnace dismantling method of this invention. 図１の炉体構造物からさらに炉体ブロックを搬出した例を模式的に示す断面図である。It is sectional drawing which shows typically the example which carried out the furnace block further from the furnace structure of FIG. 本発明の高炉解体方法で炉体構造物を吊り上げた他の例を模式的に示す断面図である。It is sectional drawing which shows typically the other example which lifted the furnace structure by the blast furnace dismantling method of this invention. 図３の炉体構造物からさらに炉体ブロックを搬出した例を模式的に示す断面図である。It is sectional drawing which shows typically the example which carried out the furnace block further from the furnace structure of FIG. 従来のブロック解体工法で炉頂構造体を搬出する例を模式的に示す断面図である。It is sectional drawing which shows typically the example which carries out a furnace top structure by the conventional block demolition construction method. 従来のブロック解体工法で高炉炉体を吊り上げた例を模式的に示す断面図である。It is sectional drawing which shows typically the example which lifted the blast furnace furnace body by the conventional block demolition construction method. 図６の高炉炉体からさらに炉体ブロックを搬出した例を模式的に示す断面図である。It is sectional drawing which shows typically the example which carried out the furnace block further from the blast furnace furnace body of FIG.

符号の説明Explanation of symbols

１ 炉体支持柱
2a 吊り上げ装置
2b 吊り上げ装置
2c 吊り上げ装置
３ 移動台
４ 支持ブロック
５ 炉体輸送台車
６ 高炉基礎
７ 路面
８ クレーン
9a 吊り部材
9b 吊り部材
9c 吊り部材
10 ワイヤロープ
11 ワイヤロープ
12 ワイヤロープ
13 アウトリガークレーン
14 炉頂設備
15 傾斜路 1 Furnace column
2a Lifting device
2b Lifting device
2c Lifting device 3 Moving platform 4 Support block 5 Furnace transport cart 6 Blast furnace foundation 7 Road surface 8 Crane
9a Hanging member
9b Suspension member
9c Suspension member
10 wire rope
11 Wire rope
12 wire rope
13 Outrigger crane
14 Furnace top equipment
15 Ramp

Claims (3)

高炉炉体を炉頂構造体および２個以上のリング状の炉体ブロックに分割して炉体の解体を行なう高炉解体方法において、上段に位置する前記炉頂構造体および前記炉体ブロックを一体的に高炉基礎上で吊り上げて、最下段の前記炉体ブロックから順次、前記炉頂構造体および前記炉体ブロックを切断後、前記高炉基礎上の移動台により前記炉頂構造体および前記炉体ブロックを前記高炉基礎上面に載置し、前記高炉基礎のレベルに合わせて積載レベル調整架構をセットした炉体輸送台車に移載し、前記炉体輸送台車で解体場まで搬送することを特徴とする高炉解体方法。 In a blast furnace demolition method in which a blast furnace furnace body is divided into a furnace top structure and two or more ring-shaped furnace body blocks, and the furnace body is disassembled, the furnace top structure and the furnace body block located in the upper stage are integrated. The furnace top structure and the furnace body are lifted on a blast furnace foundation, and after cutting the furnace top structure and the furnace body block sequentially from the bottom furnace block, the movable body on the blast furnace foundation is used. characterized in that placing the block on the blast furnace foundation top, front SL loading level adjustment Frames and transferred to set the furnace body transport carriage in accordance with the level of the blast furnace foundation, conveys to breaking yards in the furnace body transport carriage Blast furnace dismantling method. 高炉炉体を炉頂構造体および２個以上のリング状の炉体ブロックに分割して炉体の解体を行なう高炉炉体解体方法において、前記炉頂構造体および前記炉体ブロックを輸送する路面から高炉基礎の上面まで傾斜路をバラスを用いて設け、上段に位置する前記炉頂構造体および前記炉体ブロックを一体的に前記高炉基礎上で吊り上げて、最下段の前記炉体ブロックから順次、前記炉頂構造体および前記炉体ブロックを切断後、炉体輸送台車に載置し、前記炉体輸送台車で解体場まで搬送することを特徴とする高炉解体方法。 In a blast furnace body dismantling method in which a blast furnace furnace body is divided into a furnace top structure body and two or more ring-shaped furnace body blocks to disassemble the furnace body, a road surface for transporting the furnace top structure body and the furnace body block A ramp is provided from the top to the upper surface of the blast furnace foundation using a ballast, the furnace top structure and the furnace body block located in the upper stage are integrally lifted on the blast furnace foundation, and sequentially from the furnace body block in the lowermost stage. A blast furnace dismantling method comprising: cutting the furnace top structure and the furnace body block, placing the furnace top structure and the furnace body block on a furnace body transporting carriage, and transporting the furnace body transport carriage to a dismantling site. 高炉炉体を炉頂構造体および２個以上のリング状のブロックに分割して炉体の組立てを行なう高炉炉体建設方法において、前記炉頂構造体および前記炉体ブロックを搬送する路面から高炉基礎の上面まで傾斜路をバラスを用いて設け、前記炉頂構造体および前記炉体ブロックを地組場で組立て後、前記地組場で炉体輸送台車に載置し、前記炉体輸送台車で前記高炉基礎まで搬送し、前記炉頂構造体を前記高炉基礎上で吊り上げて、次いで下段に位置する複数の前記炉体ブロックを順次、前記高炉基礎上に搬送し、互いに中心軸が一致するように前記移動台の位置を調整後、前記炉体ブロックを吊り上げ、しかる後に接合させて高炉を建設することを特徴とする高炉建設方法。 In a blast furnace furnace construction method for assembling a furnace body by dividing the blast furnace furnace body into a furnace top structure and two or more ring-shaped blocks, a blast furnace from a road surface carrying the furnace top structure and the furnace body block A ramp is provided up to the upper surface of the foundation using a ballast, and the furnace top structure and the furnace body block are assembled at the assembly site, and then placed on the furnace assembly transport cart at the assembly site. To the blast furnace foundation, the furnace top structure is lifted on the blast furnace foundation, and then a plurality of the furnace body blocks located in the lower stage are sequentially conveyed onto the blast furnace foundation, and the central axes coincide with each other. Thus, after adjusting the position of the moving table, the furnace block is lifted and then joined to construct a blast furnace.
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JP3165362B2 (en) * 1995-11-28 2001-05-14 川崎製鉄株式会社 Short-term repair and construction of blast furnace
JP2005015847A (en) * 2003-06-26 2005-01-20 Jfe Steel Kk Lower working shop in blast furnace

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