JP2011058026A - Method and apparatus for removing residual pig iron from blast furnace - Google Patents
Method and apparatus for removing residual pig iron from blast furnace Download PDFInfo
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- JP2011058026A JP2011058026A JP2009206193A JP2009206193A JP2011058026A JP 2011058026 A JP2011058026 A JP 2011058026A JP 2009206193 A JP2009206193 A JP 2009206193A JP 2009206193 A JP2009206193 A JP 2009206193A JP 2011058026 A JP2011058026 A JP 2011058026A
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 229910000805 Pig iron Inorganic materials 0.000 title abstract 8
- 239000011449 brick Substances 0.000 claims abstract description 10
- 230000000630 rising effect Effects 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 28
- 239000002184 metal Substances 0.000 description 15
- 229910052751 metal Inorganic materials 0.000 description 15
- 229910052742 iron Inorganic materials 0.000 description 14
- 238000007664 blowing Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 238000007634 remodeling Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
本発明は、残銑を受けるトピードカーが走行するレールのレベルを下げる大改修をすることなく、炉底部の残銑を抜くことができる高炉の残銑抜き方法及び残銑抜き装置に関する。 The present invention relates to a blast furnace residue removal method and a residue removal device that can remove the residue at the bottom of the furnace without greatly modifying the level of the rail on which the topped car that receives the residue travels.
高炉の改修においては、高炉炉底部を解体する前に吹き止めた高炉内の残銑及び残滓を解体撤去するが、この吹き止めた高炉内の残銑及び残滓が多いと、残銑及び残滓を解体・除去する期間が長く必要となるのみならず、作業環境の悪い炉内での解体・除去作業が多くなることによる安全上の問題や健康上の問題ばかりでなく、残銑及び残滓を解体・撤去する費用も高くなる問題があった。 In refurbishing the blast furnace, the residues and residues in the blast furnace that were blown down before dismantling the bottom of the blast furnace are dismantled and removed, but if there are many residues and residues in the blown blast furnace, Not only does it require a long period of dismantling / removal, but it also dismantles not only the safety and health problems caused by the increased number of dismantling / removing operations in a furnace with a poor working environment, but also debris and debris・ There was a problem that the cost of removal was high.
そこで、送風停止後に出銑口レベルより下に残留する溶銑をほぼ全量炉外に排出して除去することができ、高炉吹き止めによる残銑及び残滓の解体撤去の日数を短縮しようとする高炉の吹止方法が提案されている(特許文献1参照)。 Therefore, it is possible to discharge almost all the hot metal remaining below the outlet level after stopping the blowing, and remove it from the furnace, reducing the number of days for demolition and removal of residue and residue by blast furnace blowing. A blowing method has been proposed (see Patent Document 1).
特許文献1に記載された吹止方法では、高炉を吹き止めて操業を停止する際に、まず、装入物の供給を停止し、図4に示すように、高炉底部1の出銑口2を開放して出銑口レベル以上の溶銑を流出させる。出銑される溶銑は、出銑大樋3、溶銑樋19及び溶銑傾注樋20を流れてトピードカー4の炉口5より受銑する。
In the blowing method described in
出銑口2からの出銑が完了すると、出銑口2を塞ぎ、羽口から送風して炉内を高圧にし、次いで図5に示すように、鉄皮8側から炉底のれんが9の浸食面の直下域にボーリングして溶銑排出孔10を形成する。炉底れんが9の浸食面に発生する炉底れんが9の目地割れ部と溶銑排出孔10が連通し、出銑口レベル以下に残留していた溶銑7が目地割れ部から溶銑排出孔10へ流れて炉外に排出される。この方法により、炉底6に残銑7がなくなり、炉内残留物の除去に要する時間が著しく短縮されるというものである。
When the extraction from the
前記特許文献1の炉底れんがをボーリングする吹止方法では、図5に示すように、トピードカーの溶銑流入口のレベルCが炉底のレベルBより高いため、炉底部の残銑の排出ができない。排出するためには、図5に示すように、トピードカーの炉口のレベルCを炉底のレベルBより下げる必要がある。
In the blow-off method for boring the bottom brick of
しかしながら、トピードカーが走行するレールのレベル下げは、レール勾配を1/100以下にする必要があることから長距離にわたるため、改造費用が膨大となるので、実施されていない。そのため、炉底部からの残銑排出はせずに、注水による炉内冷却後に炉内側より排出しているが、鉄塊となるために長時間を要していた。 However, lowering the level of the rail on which the topped car travels has not been implemented because the rail slope needs to be 1/100 or less and is a long distance, so the cost of remodeling becomes enormous. Therefore, the residue is not discharged from the bottom of the furnace, but is discharged from the inside of the furnace after cooling in the furnace by pouring water, but it takes a long time to become an iron ingot.
そこで、本発明は、トピードカーが走行するレールのレベル下げをすることなく、炉底部の残銑を排出することができる高炉の残銑抜き方法及び残銑抜き装置を提供するものである。 Therefore, the present invention provides a blast furnace residue removal method and a residue removal device that can discharge residue at the bottom of a furnace without lowering the level of a rail on which a topped car travels.
本発明は、高炉炉底部に設けられた出銑口のレベル以下に溜まっている残銑を抜く高炉の残銑抜き方法において、水平部と、水平部から分岐させて立ち上げた立ち上げ部からなり、水平部と立ち上げ部は軸方向に貫通孔が形成されるとともに水平部の貫通孔と立ち上げ部の貫通孔が連通している残銑抜き装置を高炉炉底部に取り付け、水平部の貫通孔を通して炉底れんがをボーリングして炉底に連通する残銑排出孔を形成し、ボーリング後に貫通孔の高炉外側の開口を閉塞し、高炉内の圧力を上昇させて残銑を残銑排出孔から水平部の貫通孔に流し、さらに立ち上げ部の貫通孔を上昇させて排出することを特徴とする。 The present invention relates to a blast furnace residue removal method for removing residues accumulated below the level of a tap outlet provided at the bottom of a blast furnace furnace, from a horizontal portion and a startup portion that is branched from the horizontal portion and started up. At the bottom of the blast furnace, the horizontal part and the rising part are attached to the bottom of the blast furnace furnace with a through hole formed in the axial direction and the horizontal part's through hole communicating with the through part's through hole. Boring the bottom brick through the through hole to form a residue discharge hole communicating with the bottom of the furnace. After boring, the opening outside the blast furnace of the through hole is closed and the pressure inside the blast furnace is increased to discharge the residue. It flows from the hole to the through hole in the horizontal part, and further, the through hole in the rising part is raised and discharged.
前記構成において、残銑を立ち上げ部の貫通孔より排出樋、あるいは出銑口からの出銑時に使用する出銑大樋に排出する。 In the above-described configuration, the residue is discharged from the through hole of the rising portion to the discharge basket or the output large bowl used for output from the output port.
また、本発明は、高炉炉底部に設けられた出銑口のレベル以下に溜まっている残銑を抜く高炉の残銑抜き装置において、水平部と、水平部から分岐させて立ち上げた立ち上げ部からなり、水平部と立ち上げ部は軸方向に貫通孔が形成されるとともに、水平部の貫通孔と立ち上げ部の貫通孔は連通し、水平部の貫通孔の両端の開口のうち、一方の高炉側の開口は水平部の貫通孔を通してボーリングにより形成された、炉底に連通する残銑排出孔に連通可能であり、他方の高炉外側の開口はボーリングに使用した後に耐火物で閉塞されることを特徴とする。 The present invention also relates to a blast furnace residue removal device for removing residues accumulated below the level of the tap outlet provided at the bottom of the blast furnace furnace, and starting up by branching from the horizontal portion and the horizontal portion. The horizontal part and the rising part are formed with through-holes in the axial direction, and the horizontal part's through-hole and the rising part's through-hole communicate with each other. One opening on the blast furnace side can be communicated with a residue discharge hole that is formed by boring through the horizontal through hole and communicates with the bottom of the furnace. It is characterized by being.
本発明は、炉内の圧力を上昇させて残銑抜き装置により残銑の排出レベルを上げて排出できるので、残銑を受けるレベルを下げるための大改修をすることなく残銑を抜くことができる。その結果、炉底に残留する残留物の除去に要する時間を大幅に減少させることができる。 Since the present invention can raise the pressure in the furnace and raise the residue discharge level by the residue removal device, the residue can be removed without major modification to reduce the level of receiving residue. it can. As a result, the time required to remove the residue remaining on the furnace bottom can be greatly reduced.
本発明の実施例を、図面を参照しながら説明する。 Embodiments of the present invention will be described with reference to the drawings.
図1において、高炉を止めて出銑口2のレベルを超える溶銑を抜き出す際、まず、装入物の供給を停止し、図1の1点鎖線で示すように、高炉炉底部1の出銑口2を開放して出銑口レベル以上の溶銑を流出させる。流出した溶銑は、出銑大樋3を流れ、トピードカー4の炉口5から受銑する。
In FIG. 1, when the blast furnace is stopped and hot metal exceeding the level of the
出銑口2からの出銑後、出銑口2のレベル以下で炉底6に溜まっている残銑7を抜くため、出銑口2を塞ぎ、羽口から送風して炉内を高圧にする。一方で、鉄皮8側から炉底のれんが9をボーリングし、残銑排出孔10を形成する。
In order to remove the
炉底のれんが9のボーリングによる残銑排出孔10の形成及び残銑排出孔10による残銑抜きは、残銑抜き装置11により行う。
Formation of the
残銑抜き装置11は、図2に示すように、水平部12と水平部12から分岐させて立ち上げた立ち上げ部13からなる。水平部12と立ち上げ部13は、両端が開放された貫通孔14,15が形成された耐火物16を鉄皮17で被覆し、水平部12の貫通孔14と立ち上げ部13の貫通孔15は連通している。
As shown in FIG. 2, the
炉底のれんが9をボーリングして残銑排出孔10を形成する際は、残銑抜き装置11の水平部12の高炉側を高炉炉底部1の鉄皮8に固定し、水平部12の貫通孔14にドリルを挿入して炉底のれんが9を削孔し、炉底6に残銑排出孔10を開ける。開口後、水平部12の貫通孔14からドリルを抜いた後、貫通孔14及び貫通孔15が連通した状態を維持して貫通孔14の開口を耐火材(マッド)で塞ぐ。
When the
ボーリングにより残銑排出孔10が形成されると、炉底6、残銑排出孔10、貫通孔14及び貫通孔15が連通し、羽口からの送風により炉内圧が上がっているので、残銑7は、炉底6から残銑排出孔10および貫通孔14を流れ、さらに貫通孔15を上昇して排出樋18に流れ、トピードカー4の炉口5へ流入する。
When the
本実施例では、残銑抜き装置11の立ち上げ部13の排出レベルがトピードカー4の炉口5のレベルまで上昇しているので、炉内圧が低く、出銑口レベル以上の溶銑を流出させる出銑大樋3まで残銑が上昇しない場合に、この排出レベルまで残銑が上昇する炉内圧、例えば、炉内圧が約0.2MPaの場合、約2mのレベル上げ効果があるので、排出樋18を別途配置することにより、炉底6から排出する残銑7を、トピードカー4のレールのレベル下げをすることなくトピードカー4へ排出することが可能となる。
In the present embodiment, since the discharge level of the start-
本実施例は、炉内圧を高くすることにより、出銑口2からの出銑に使用する出銑大樋3を利用して残滓7を抜くものである。
In the present embodiment, the
図3において、炉内圧が0.4MPaの場合に約4mのレベル上げ効果があるので、炉内圧を上げることにより、通常の出銑口による出銑と同様に、通常使用している出銑大樋、溶銑樋、溶銑傾注樋を使ってトピードカー4へ排出することが可能となる。これにより改造コストを大幅に低減することができる。 In FIG. 3, when the furnace internal pressure is 0.4 MPa, there is an effect of raising the level by about 4 m. It is possible to discharge to the topped car 4 using hot metal or hot metal tilting iron. Thereby, the remodeling cost can be significantly reduced.
1:高炉底部
2:出銑口
3:出銑大樋
4:トピードカー
5:炉口
6:炉底
7:残銑
8:鉄皮
9:炉底のれんが
10:残銑排出孔
11:残銑抜き装置
12:水平部
13:立ち上げ部
14:水平部の貫通孔
15:立ち上げ部の貫通孔
16:耐火物
17:鉄皮
18:排出樋
19:溶銑樋
20:溶銑傾注樋
1: Blast Furnace Bottom 2: Outlet Exit 3: Outer Odori 4: Topped Car 5: Furnace Entrance 6: Furnace Bottom 7: Residue 8: Iron Skin 9: Furnace Bottom Brick 10: Residue Exhaust Hole 11: Residue Exhaust Device 12: Horizontal portion 13: Raising portion 14: Horizontal through hole 15: Raised through hole 16: Refractory 17: Iron skin 18: Discharge iron 19: Hot metal 20: Hot metal tilt
Claims (4)
水平部と、水平部から分岐させて立ち上げた立ち上げ部からなり、水平部と立ち上げ部は軸方向に貫通孔が形成されるとともに水平部の貫通孔と立ち上げ部の貫通孔が連通している残銑抜き装置を高炉炉底部に取り付け、水平部の貫通孔を通して炉底れんがをボーリングして炉底に連通する残銑排出孔を形成し、ボーリング後に貫通孔の高炉外側の開口を閉塞し、高炉内の圧力を上昇させて残銑を残銑排出孔から水平部の貫通孔に流し、さらに立ち上げ部の貫通孔を上昇させて排出することを特徴とする高炉の残銑抜き方法。 In the blast furnace residue removal method for removing residues accumulated below the level of the tap outlet provided at the bottom of the blast furnace furnace,
It consists of a horizontal part and a rising part that branches off from the horizontal part, and the horizontal part and the rising part have through-holes formed in the axial direction, and the through-holes in the horizontal part and the through-holes in the rising part communicate with each other. At the bottom of the blast furnace, the residue removal device is bored, and the bottom brick is bored through the horizontal through-hole to form a residue discharge hole communicating with the bottom of the furnace. Blast furnace residue removal, characterized by closing, raising the pressure in the blast furnace, allowing the residue to flow from the residue discharge hole to the horizontal through hole, and further raising the discharge hole of the start-up part to discharge Method.
水平部と、水平部から分岐させて立ち上げた立ち上げ部からなり、水平部と立ち上げ部は軸方向に貫通孔が形成されるとともに、水平部の貫通孔と立ち上げ部の貫通孔は連通し、水平部の貫通孔の両端の開口のうち、一方の高炉側の開口は水平部の貫通孔を通してボーリングにより形成された、炉底に連通する残銑排出孔に連通可能であり、他方の高炉外側の開口はボーリングに使用した後に耐火物で閉塞されることを特徴とする高炉の残銑抜き装置。 In the blast furnace residue removal device for removing residue accumulated below the level of the tap outlet provided at the bottom of the blast furnace furnace,
It consists of a horizontal part and a rising part that branches off from the horizontal part, and the horizontal part and the rising part are formed with through holes in the axial direction. Of the openings at both ends of the through hole in the horizontal part, one opening on the blast furnace side can be communicated with a residue discharge hole formed by boring through the through hole in the horizontal part and communicating with the bottom of the furnace. The blast furnace residue removing device is characterized in that the opening outside the blast furnace is closed with a refractory after being used for boring.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108504807A (en) * | 2018-04-28 | 2018-09-07 | 上海二十冶建设有限公司 | A kind of levelling control method of Blast Furnace Bottom refractory material construction |
CN108728599A (en) * | 2018-06-22 | 2018-11-02 | 攀钢集团工程技术有限公司 | A kind of Blast Furnace Bottom residue iron method for dismounting |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101770069B1 (en) | 2016-07-22 | 2017-08-21 | 현대제철 주식회사 | Runner for furnace |
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CN108728599A (en) * | 2018-06-22 | 2018-11-02 | 攀钢集团工程技术有限公司 | A kind of Blast Furnace Bottom residue iron method for dismounting |
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