JP2007070692A - Method for constructing casting bed for blast furnace - Google Patents

Method for constructing casting bed for blast furnace Download PDF

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JP2007070692A
JP2007070692A JP2005258943A JP2005258943A JP2007070692A JP 2007070692 A JP2007070692 A JP 2007070692A JP 2005258943 A JP2005258943 A JP 2005258943A JP 2005258943 A JP2005258943 A JP 2005258943A JP 2007070692 A JP2007070692 A JP 2007070692A
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blast furnace
block
foundation
casting bed
cast floor
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JP4784215B2 (en
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Masao Fujita
昌男 藤田
Takahiro Kumeta
隆弘 久米田
Hirotaka Kojima
啓孝 小島
Kazuya Noda
和也 野田
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JFE Steel Corp
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JFE Steel Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for constructing a casting bed for blast furnace with which the working term for constructing the casting bed for blast furnace can be shortened. <P>SOLUTION: Casting bed blocks manufactured at a field preassembling site, are carried into the foundation just neat the blast furnace, and after setting the casting bed blocks to a prescribed position on this foundation, the casting bed blocks mutually adjoined, are joined and fixed onto this foundation. A sloping way is arranged from a road surface for running a carrying truck to the upper surface of this foundation and the above casting bed blocks are carried to the above foundation by running the carrying truck, on which the casting bed blocks manufactured at the separated working place, are loaded, from the road surface to this foundation. Then, after setting the casting bed blocks to the prescribed position on this foundation, the casting bed blocks mutually adjoined, are joined and fixed to this foundation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、高炉の建設工事における鋳床の構築に要する工期の短縮を可能にする高炉鋳床構築方法に関するものである。   The present invention relates to a blast furnace casting bed construction method capable of shortening a work period required for construction of a casting bed in blast furnace construction.

高炉の改修にともなう建設あるいは新たな高炉の建設を行なう際に、まず建設現場となる高炉基礎（いわゆるケーソン）とは異なる場所に作業場（いわゆる地組場）を設置し、その地組場で、高炉の炉頂部から炉底部まで２個以上のリング状の炉体ブロックに分割して製作する。このとき、地組場でステーブや耐火れんが等の付設装備の施工を完了する。こうして地組場で製作した各炉体ブロックを高炉基礎へ搬送して高炉を建設する（たとえば特許文献１参照）。   When constructing a blast furnace due to refurbishment or constructing a new blast furnace, a work site (a so-called caisson) is first set up in a place different from the blast furnace foundation (so-called caisson), which is the construction site. It is divided into two or more ring-shaped furnace body blocks from the top of the blast furnace to the bottom of the furnace. At this time, construction of additional equipment such as stave and refractory bricks is completed at the assembly ground. In this way, each furnace body block manufactured at the assembly ground is transported to the blast furnace foundation to construct a blast furnace (see, for example, Patent Document 1).

リング状に分割して製作した炉体ブロックを用いて高炉を建設する工法（以下、ブロック建設工法という）の従来の手順について、図２，３を参照して以下に説明する。
高炉の建設にあたっては、最上段に位置する炉体ブロックＡ（すなわち炉頂部ブロック）を地組場で製作して高炉基礎６へ搬送する。炉体ブロックＡを搬送するためには、地組場で炉体ブロックＡを輸送台車５上の吊換台車３上に載置し、高炉基礎６の近傍へ搬送する。輸送台車５は路面を走行する台車であり、車輪にはタイヤが装着される。 A conventional procedure of a method for constructing a blast furnace (hereinafter referred to as a block construction method) using a furnace block manufactured by dividing it into a ring shape will be described below with reference to FIGS.
In constructing the blast furnace, the furnace block A (that is, the furnace top block) located at the uppermost stage is manufactured at the ground assembly site and transported to the blast furnace foundation 6. In order to transport the furnace body block A, the furnace body block A is placed on the suspension carriage 3 on the transport carriage 5 at the assembly ground and is transported to the vicinity of the blast furnace foundation 6. The transport cart 5 is a cart traveling on the road surface, and tires are mounted on the wheels.

炉体ブロックＡを移載する際には、揚重装置（図示せず）を用いて吊り上げて、吊換台車３に移載する。吊換台車３の上にはレールがあり、その上にスライド台車８が載置され、吊換台車３上のレールと高炉基礎６上のレールは同一レベルになっている。さらに吊換台車３の上面のレールと高炉基礎６上のレールとを締結し、炉体ブロックＡはスライド台車８に上架したまま、スライド台車８ごと吊換台車３から高炉基礎６上に搬送される。   When transferring the furnace block A, the furnace block A is lifted using a lifting device (not shown) and transferred to the suspension cart 3. There is a rail on the suspension cart 3, and a slide cart 8 is placed on the rail. The rail on the suspension cart 3 and the rail on the blast furnace foundation 6 are at the same level. Further, the rail on the upper surface of the suspension cart 3 and the rail on the blast furnace foundation 6 are fastened, and the furnace block A is transported from the suspension cart 3 to the blast furnace foundation 6 together with the slide cart 8 while being mounted on the slide cart 8. The

次いで、炉体支持柱１に配設される吊り上げ装置2aから垂下したワイヤロープ10の下端を吊り部材9aに連結する。そして吊り上げ装置2aを稼動してワイヤロープ10を巻き上げることによって、炉体ブロックＡを吊り上げる。
次に炉体ブロックＡ（すなわち炉頂部ブロック）の下段に位置する炉体ブロックＢ（すなわち第２段ブロック）をスライド台車８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の中心軸と炉体ブロックＢの中心軸を一致させる。その状態を示すのが図２である。 Next, the lower end of the wire rope 10 suspended from the lifting device 2a disposed on the furnace support column 1 is connected to the suspension member 9a. And the furnace block A is lifted by operating the lifting device 2a and winding up the wire rope 10.
Next, the furnace body block B (that is, the second stage block) located at the lower stage of the furnace body block A (that is, the furnace top block) is placed on the slide carriage 8 and guided directly below the furnace body block A, and the furnace body The central axis of the block A and the central axis of the furnace block B are made to coincide. This state is shown in FIG.

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。
図２に示すように炉体ブロックＡの中心軸と炉体ブロックＢの中心軸が一致した後、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。
さらに炉体ブロックＡと炉体ブロックＢとを接合したブロック接合体を吊り上げ装置2aで吊り上げて、その下段に位置する炉体ブロックＣ（すなわち第３段ブロック）をその直下に誘導し、ブロック接合体の中心軸と炉体ブロックＢの中心軸を一致させた後、ブロック接合体を降下させて、ブロック接合体と炉体ブロックＣとを接合する。 Since the procedure for transporting the furnace block B manufactured at the ground assembly onto the blast furnace foundation 6 is the same as the transport procedure for the furnace block A, the description thereof is omitted.
As shown in FIG. 2, after the center axis of the furnace body block A and the center axis of the furnace body block B coincide, the furnace body block A is lowered and the furnace body block A and the furnace body block B are joined.
Further, a block joined body obtained by joining the furnace body block A and the furnace body block B is lifted by the lifting device 2a, and the furnace body block C (that is, the third stage block) located at the lower stage is guided directly below the block body. After making the center axis of the body coincide with the center axis of the furnace block B, the block assembly is lowered to join the block assembly and the furnace block C together.

こうして図３に示すように、順次、上段に位置するブロック接合体を吊り上げ装置2a，2bで吊り上げて、その下段に位置する炉体ブロック（以下、下段ブロックという）をブロック接合体の直下に誘導し、ブロック接合体の中心軸と下段ブロックの中心軸を一致させた後、ブロック接合体を降下させて、ブロック接合体と下段ブロックとを接合して高炉を建設する。なお図３には高炉を５個のブロックに分割して建設する例を示す。   Thus, as shown in FIG. 3, the block assembly located in the upper stage is sequentially lifted by the lifting devices 2a and 2b, and the furnace block located in the lower stage (hereinafter referred to as the lower block) is guided directly below the block assembly. Then, after making the central axis of the block joined body coincide with the central axis of the lower block, the block joined body is lowered and the block joined body and the lower block are joined to construct a blast furnace. FIG. 3 shows an example in which the blast furnace is divided into five blocks for construction.

以上に説明した通り、ブロック建設工法を適用して高炉炉体を建設することは、従来から行なわれている。
ところが高炉基礎６上に鋳床を設置する際に、地組場で予め鋳床を複数のブロックに分割して製作し、高炉基礎６へ搬送して設置するというブロック建設工法と同様の手法を用いることは困難であった。その理由を以下に説明する。 As described above, the construction of a blast furnace furnace body by applying the block construction method has been conventionally performed.
However, when the cast floor is installed on the blast furnace foundation 6, the same technique as the block construction method in which the cast floor is preliminarily divided into a plurality of blocks at the assembly ground and transported to the blast furnace foundation 6 for installation. It was difficult to use. The reason will be described below.

高炉の鋳床は、アンカーボルトやシール部材，耐火れんが，底板，冷却配管等で構成される複雑な構造を有する（特許文献２参照）。そのような鋳床を複数のブロック（以下、鋳床ブロックという）に分割したものを地組場で製作し、高炉基礎６へ搬送する途中で、輸送台車５から鋳床ブロックをクレーンで吊り上げて吊換台車３へ移載しなければならない。このとき、鋳床ブロックを吊り上げることによって、吊り具が当接する部位に局所的な変形が生じたり、あるいは鋳床ブロックの自重によって撓みが生じる惧れがある。   The blast furnace cast floor has a complex structure composed of anchor bolts, seal members, refractory bricks, bottom plates, cooling pipes, and the like (see Patent Document 2). A cast floor divided into a plurality of blocks (hereinafter referred to as a cast floor block) is manufactured at the assembly ground, and the cast floor block is lifted by a crane from the transport carriage 5 while being transported to the blast furnace foundation 6. It must be transferred to the hanging cart 3. At this time, by lifting the cast floor block, there is a possibility that local deformation may occur in a portion where the lifting tool abuts, or bending may occur due to the weight of the cast floor block.

高炉基礎６上ではスライド台車８を用いて鋳床ブロックを搬送するが、そのスライド台車８は高炉基礎６の上面に敷設されたレール上を走行する。したがって、スライド台車８は敷設されたレールに沿って一定の方向に往復するのみであり、そのレールから離隔した位置（たとえば炉体支持柱１の間）に鋳床ブロックを設置する場合は、クレーンやリフト等を用いて鋳床ブロックを吊り上げる必要がある。このときにも、鋳床ブロックを吊り上げることによって、吊り具が当接する部位に局所的な変形が生じたり、あるいは鋳床ブロックの自重によって撓みが生じる惧れがある。   On the blast furnace foundation 6, the cast floor block is conveyed using a slide carriage 8, and the slide carriage 8 travels on a rail laid on the upper surface of the blast furnace foundation 6. Therefore, the slide carriage 8 only reciprocates in a certain direction along the laid rail, and when the cast floor block is installed at a position separated from the rail (for example, between the furnace body support columns 1), It is necessary to lift the casting block using a lift or the like. Also at this time, there is a concern that the cast floor block is lifted, whereby a local deformation occurs in a portion where the lifting tool abuts, or the cast floor block is bent due to its own weight.

変形あるいは撓みが生じた鋳床ブロックを高炉基礎６上に設置すれば、各鋳床ブロックを接合する際に支障を来たす。
以上に説明した通り、従来のブロック建設工法と同様の手法を用いて鋳床を構築する技術は実用化に至っていない。したがって鋳床を構築する際には、アンカーボルト，シール部材，耐火れんが，底板、冷却配管等の部材を各々個別に搬入して、高炉基礎６上で組立て作業を行なうことによって鋳床を構築していた。そのため、鋳床の構築に多大な時間を要していた。
特開2000-282116号公報 特開2004-225142号公報 If a cast floor block in which deformation or deflection has occurred is installed on the blast furnace foundation 6, it will hinder the joining of the cast floor blocks.
As described above, a technique for constructing a cast floor using a method similar to the conventional block construction method has not been put into practical use. Therefore, when constructing the cast floor, the cast bolt is constructed by carrying in the assembly work on the blast furnace foundation 6 by individually carrying members such as anchor bolts, sealing members, refractory bricks, bottom plates, cooling pipes, etc. It was. Therefore, it took a great deal of time to construct the cast floor.
JP 2000-282116 A JP 2004-225142 A

本発明は上記のような問題を解消し、高炉の鋳床を構築する工期を短縮できる高炉鋳床構築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 casting bed construction method capable of solving the above-described problems and shortening the work period for building a blast furnace casting bed.

本発明は、高炉を建設するにあたって高炉基礎の上面に鋳床を構築する高炉鋳床構築方法において、地組場で製作した鋳床ブロックを高炉基礎まで搬送し、高炉基礎上の所定の位置に鋳床ブロックを設置した後、互いに隣り合う鋳床ブロックを接合し、かつ高炉基礎に固定する高炉鋳床構築方法である。
本発明の高炉鋳床構築方法では、輸送台車が走行する路面から高炉基礎の上面まで傾斜路を設け、地組場で製作した鋳床ブロックを載置した輸送台車が路面から傾斜路を走行して高炉基礎まで鋳床ブロックを搬送することが好ましい。 The present invention relates to a blast furnace cast floor construction method for constructing a cast floor on an upper surface of a blast furnace foundation in constructing a blast furnace, and transports a cast bed block manufactured at a ground assembly to the blast furnace foundation and puts it in a predetermined position on the blast furnace foundation. This is a method for constructing a blast furnace casting bed in which, after the casting bed block is installed, the neighboring casting bed blocks are joined and fixed to the blast furnace foundation.
In the blast furnace casting floor construction method of the present invention, an inclined road is provided from the road surface on which the transportation carriage travels to the upper surface of the blast furnace foundation, and the transportation carriage on which the cast floor block manufactured at the assembly site is placed runs on the slope from the road surface. It is preferable to transport the casting block to the blast furnace base.

本発明によれば、高炉の鋳床構築工事の工期を短縮できる。   ADVANTAGE OF THE INVENTION According to this invention, the construction period of the blast furnace cast floor construction construction can be shortened.

図１は、本発明を適用して鋳床ブロックを高炉基礎上に搬入する例を模式的に示す断面図である。
高炉の鋳床を構築するにあたって、鋳床を複数のブロックに分割した鋳床ブロック13を地組場で製作し、輸送台車５に載置して高炉基礎６へ搬送する。その際、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）まで傾斜路12を設ける。そして地組場で鋳床ブロック13を輸送台車５に載置し、その輸送台車５を路面から傾斜路12を経て高炉基礎６上まで走行させる。輸送台車５は、タイヤが装着されており、高炉基礎６の上面を走行して、鋳床ブロック13を設置する位置の直近まで搬送することが可能である。なお傾斜路12は、鋳床の構築工事（あるいは、それに続く高炉の建設工事）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。 FIG. 1 is a cross-sectional view schematically showing an example in which the present invention is applied and a cast-in block is carried onto a blast furnace foundation.
In constructing a blast furnace cast floor, a cast floor block 13 in which the cast floor is divided into a plurality of blocks is manufactured at the ground assembly, placed on the transport carriage 5 and transported to the blast furnace foundation 6. At that time, the ramp 12 is provided from the road surface on which the transport carriage 5 travels to the blast furnace foundation 6 (so-called caisson). Then, the cast floor block 13 is placed on the transport cart 5 at the assembly ground, and the transport cart 5 is caused to travel from the road surface to the blast furnace foundation 6 through the ramp 12. The transport cart 5 is equipped with tires, and can travel on the top surface of the blast furnace foundation 6 and can be transported to a position close to the position where the cast floor block 13 is installed. Since the ramp 12 is removed after the cast-floor construction work (or the subsequent blast furnace construction work) is completed, it is preferable to provide the slope 12 simply by using a ballast or the like.

次いで、鋳床ブロック13を輸送台車５から所定の位置へ移動させ、互いに隣り合う鋳床ブロック13を接合し、かつ高炉基礎６に固定する。鋳床ブロック13を輸送台車５から所定の位置へ移動させる手段は、特定の装置や機器に限定せず、高炉基礎６上面の広さや鋳床ブロック13の寸法，重量等に応じて適宜選択する。輸送台車５は平面的な回転運行，併進運行，横行運行の機能に加えて、昇降機能を備えている。したがって輸送台車５によって鋳床ブロック13を設置する位置まで搬送でき、さらに隣り合う鋳床ブロック13を接合できるので、鋳床ブロック13の変形や撓みは発生しない。   Next, the cast floor block 13 is moved from the transport carriage 5 to a predetermined position, and the adjacent cast floor blocks 13 are joined and fixed to the blast furnace foundation 6. The means for moving the cast floor block 13 from the transport carriage 5 to a predetermined position is not limited to a specific device or equipment, and is appropriately selected according to the size of the top surface of the blast furnace base 6 and the dimensions and weight of the cast floor block 13. . The transport cart 5 has a lift function in addition to the functions of planar rotation operation, translation operation, and traverse operation. Therefore, since it can convey to the position which installs the cast floor block 13 with the transport trolley 5, and also the adjacent cast floor block 13 can be joined, a deformation | transformation and bending of the cast floor block 13 do not generate | occur | produce.

以上に説明した通り、本発明の高炉鋳床構築方法によれば、地組場で予め製作した鋳床ブロック13を輸送台車５に載置して高炉基礎６の上面まで搬送し、隣り合う鋳床ブロック13を接合することによって鋳床を構築できる。高炉の鋳床は、アンカーボルトやシール部材，耐火れんが，底板，冷却配管等の様々な部材が配設される複雑な構造を有するものであるが、地組場から高炉基礎６上の所定の位置へ搬送する間に鋳床ブロック13の変形や撓みは発生しないので、これらの各部材を支障なく接合することが可能である。   As described above, according to the blast furnace casting floor construction method of the present invention, the casting floor block 13 manufactured in advance at the assembly ground is placed on the transport carriage 5 and conveyed to the upper surface of the blast furnace foundation 6 to be adjacent to the casting. A cast floor can be constructed by joining the floor blocks 13. The blast furnace cast floor has a complicated structure in which various members such as anchor bolts, seal members, refractory bricks, bottom plates, and cooling pipes are arranged. Since the cast floor block 13 is not deformed or bent while being transported to the position, these members can be joined without any trouble.

したがって、アンカーボルトやシール部材，耐火れんが，底板，冷却配管等の部材を各々個別に搬入し、高炉基礎６上で組立て作業を行なって鋳床を構築する従来の方法に比べて、大幅に工期を短縮できる。   Therefore, compared with the conventional method in which anchor bolts, sealing members, refractory bricks, bottom plates, cooling pipes, etc. are individually carried in and assembled on the blast furnace foundation 6 to construct a cast floor, the construction period is significantly longer. Can be shortened.

図１に示すように本発明を適用し、高炉の鋳床を建設した。すなわち、バラスを用いて傾斜路12を設け、地組場で製作した鋳床ブロック13を輸送台車５で高炉基礎６の上面まで搬送した。さらに輸送台車５を用いてから所定の位置へ鋳床ブロック13を移動させた後、隣り合う鋳床ブロック13を接合し、かつ高炉基礎６に固定することによって鋳床を構築した。なお、傾斜路12の斜度は５％とした。これを発明例とする。   As shown in FIG. 1, the present invention was applied and a blast furnace cast floor was constructed. That is, the ramp 12 was provided using the ballast, and the cast floor block 13 manufactured at the assembly ground was transported to the upper surface of the blast furnace foundation 6 by the transport carriage 5. Further, after the casting bed block 13 was moved to a predetermined position after using the transport carriage 5, the adjacent casting bed block 13 was joined and fixed to the blast furnace foundation 6 to construct a casting bed. The slope of the ramp 12 was 5%. This is an invention example.

一方、従来は、鋳床を構成する様々な部材を個別に搬入し、高炉基礎６上で組立て作業を行なって鋳床を構築した。これを従来例とする。
発明例と従来例について、鋳造の構築に要する工事期間を比べると、発明例の方が７日短縮された。 On the other hand, conventionally, various members constituting the cast floor are individually carried in and assembled on the blast furnace foundation 6 to construct the cast floor. This is a conventional example.
When the construction period required for the construction of casting was compared between the inventive example and the conventional example, the inventive example was shortened by 7 days.

本発明の高炉鋳床構築方法を適用して鋳床ブロックを搬入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 in a cast floor block by applying the blast furnace cast floor construction method of this invention. 従来のブロック工法で炉頂ブロック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 top block with the conventional block construction method. 従来のブロック工法でブロック接合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 block conjugate | zygote with the conventional block construction method.

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
３ 吊換台車
５ 輸送台車
６ 高炉基礎
７ 路面
８ スライド台車
9a 吊り部材
9b 吊り部材
10 ワイヤロープ
11 ワイヤロープ
12 傾斜路
13 鋳床ブロック
1 Furnace column
2a Lifting device
2b Lifting device 3 Suspension cart 5 Transport cart 6 Blast furnace foundation 7 Road surface 8 Slide cart
9a Hanging member
9b Suspension member
10 wire rope
11 Wire rope
12 Ramp
13 Cast floor block

Claims (2)

高炉を建設するにあたって高炉基礎の上面に鋳床を構築する高炉鋳床構築方法において、地組場で製作した鋳床ブロックを前記高炉基礎まで搬送し、前記高炉基礎上の所定の位置に前記鋳床ブロックを設置した後、互いに隣り合う鋳床ブロックを接合し、かつ前記高炉基礎に固定することを特徴とする高炉鋳床構築方法。   In constructing a blast furnace casting floor in which a cast floor is constructed on the upper surface of a blast furnace foundation when constructing a blast furnace, a cast floor block manufactured at a ground assembly is transported to the blast furnace foundation and the casting is placed at a predetermined position on the blast furnace foundation. A method for constructing a blast furnace cast floor, comprising installing a floor block, joining adjacent cast floor blocks, and fixing the block to the blast furnace foundation. 輸送台車が走行する路面から前記高炉基礎の上面まで傾斜路を設け、前記地組場で製作した前記鋳床ブロックを載置した前記輸送台車が前記路面から前記傾斜路を走行して前記高炉基礎まで前記鋳床ブロックを搬送し、前記高炉基礎上の所定の位置に前記鋳床ブロックを設置した後、互いに隣り合う鋳床ブロックを接合し、かつ前記高炉基礎に固定することを特徴とする請求項１に記載の高炉鋳床構築方法。
An inclined road is provided from a road surface on which the transport carriage travels to an upper surface of the blast furnace foundation, and the transport carriage on which the cast floor block manufactured at the assembly site is placed travels on the slope from the road surface to form the blast furnace foundation. The cast floor block is conveyed to a predetermined position on the blast furnace foundation, the cast floor block is installed at a predetermined position, and then the adjacent cast floor blocks are joined and fixed to the blast furnace foundation. Item 4. A blast furnace casting bed construction method according to Item 1.
JP2005258943A 2005-09-07 2005-09-07 Blast furnace casting floor construction method Active JP4784215B2 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09143521A (en) * 1995-11-28 1997-06-03 Kawasaki Steel Corp Method for reconstructing and constructing blast furnace in short time
JP2005015847A (en) * 2003-06-26 2005-01-20 Jfe Steel Kk Lower working shop in blast furnace

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09143521A (en) * 1995-11-28 1997-06-03 Kawasaki Steel Corp Method for reconstructing and constructing blast furnace in short time
JP2005015847A (en) * 2003-06-26 2005-01-20 Jfe Steel Kk Lower working shop in blast furnace

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