JPH0322444B2 - - Google Patents
Info
- Publication number
- JPH0322444B2 JPH0322444B2 JP4597187A JP4597187A JPH0322444B2 JP H0322444 B2 JPH0322444 B2 JP H0322444B2 JP 4597187 A JP4597187 A JP 4597187A JP 4597187 A JP4597187 A JP 4597187A JP H0322444 B2 JPH0322444 B2 JP H0322444B2
- Authority
- JP
- Japan
- Prior art keywords
- blast furnace
- furnace
- damaged
- damaged area
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000008439 repair process Effects 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 23
- 238000005507 spraying Methods 0.000 claims description 20
- 239000011823 monolithic refractory Substances 0.000 claims description 10
- 238000010586 diagram Methods 0.000 description 12
- 230000000694 effects Effects 0.000 description 7
- 239000007921 spray Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 239000011819 refractory material Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Blast Furnaces (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、高炉の炉内壁耐火物の補修方法に関
し、特に炉内装入物の円周バランスを維持するこ
とにより高炉操業の安定化ならびに炉体寿命の延
長に寄与できるようにした補修方法に関する。Detailed Description of the Invention [Industrial Application Field] The present invention relates to a method for repairing refractories on the inner wall of a blast furnace, and in particular to stabilizing blast furnace operation and improving furnace operation by maintaining the circumferential balance of the contents inside the furnace. It relates to a repair method that can contribute to extending the lifespan of the body.
近年、高炉操業においては、より安定的でしか
も効率のよい操業が要請されている。そのための
対策の一つとして、高炉内を上昇するガス流分布
を制御することが重要であり、このガス流分布の
制御には炉内装入物の円周バランスが大きく影響
を与えるものであることが知られている。この円
周バランスが乱れた場合、例えば、上昇ガス流が
偏流し、吹き付けや付着物の生成が起こり、その
結果高炉操業が不安定になる。一方、高炉の炉体
寿命の延長に伴つて炉内壁耐火物の損傷、浸食に
起因する円周バランスの不均一化が生じている。
In recent years, more stable and efficient blast furnace operation has been required. As one of the measures for this purpose, it is important to control the gas flow distribution rising inside the blast furnace, and the circumferential balance of the contents in the furnace has a large influence on controlling this gas flow distribution. It has been known. If this circumferential balance is disrupted, for example, the rising gas flow will drift, blowing and deposits will occur, resulting in unstable blast furnace operation. On the other hand, as the life of the blast furnace body increases, the circumferential balance becomes uneven due to damage and erosion of the refractories on the inner wall of the furnace.
そこで、従来、上記炉内壁損傷に起因する円周
バランスの不均一化を防止するために、高炉の予
定休風時に炉内壁耐火物の損傷、浸食部分を補修
する熱間吹き付け方法が提案されている。この熱
間吹き付けは、高炉の予定休風時に炉内に熱間吹
き付け装置を挿入し、上記炉内耐火物の損傷部分
に不定形耐火物を吹き付けることにより補修する
方法である。この補修方法によれば、高炉を停止
することなく健全な炉内壁を復元できることか
ら、上記要請にある程度応えられる。 Therefore, in order to prevent the uneven circumferential balance caused by the above-mentioned damage to the furnace inner wall, a hot spraying method has been proposed to repair the damaged and eroded parts of the refractory on the furnace inner wall during the scheduled wind shutdown of the blast furnace. There is. This hot spraying is a method of repairing by inserting a hot spraying device into the blast furnace during scheduled wind shutdown and spraying monolithic refractories onto the damaged portions of the refractories in the furnace. According to this repair method, a healthy furnace inner wall can be restored without stopping the blast furnace, so that the above-mentioned request can be met to some extent.
しかしながら、上記従来の熱間吹き付けによる
補修方法では、特に与えられた予定休風時間が短
い場合は、損傷部分を充分に復元できない場合が
あるという問題点がある。即ち、上記予定休風時
間内に補修できる範囲は限られているのに対し、
健全な炉内壁をどの程度生成させるべきか明確で
なく、作業者の経験に任されていた。そのため上
記損傷部分が大きかつたり、複数箇所に及んでい
たりする場合は、結局与えられた予定休風時間の
すべてを利用して作業を行うしかなく、その結
果、補修後においても円周バランスが改善されて
いないという問題が生じる。
However, the above-mentioned conventional repair method using hot spraying has a problem in that it may not be possible to restore the damaged part sufficiently, especially when the scheduled wind down time is short. In other words, while the range that can be repaired within the scheduled wind down time is limited,
It was not clear how much healthy the inner wall of the furnace should be, and it was left up to the experience of the operator. Therefore, if the above-mentioned damaged area is large or covers multiple locations, the work will have to be carried out using all of the scheduled wind down time, and as a result, even after repairs, the circumferential balance will be affected. The problem arises that it has not been improved.
本発明の目的は、上記予定休風時間内に有効に
損傷部分を補修でき、確実に円周バランスを改善
できる高炉の炉壁補修方法を提供することにあ
る。 An object of the present invention is to provide a method for repairing a blast furnace wall that can effectively repair damaged parts within the scheduled wind down time and reliably improve the circumferential balance.
本件発明者らは、上記目的を達成するために、
上記炉内壁の侵食と高炉内に投入される装入物の
降下速度とは密接な関係があることに着目し、つ
まり損傷、浸食部分の位置、大きさと装入物降下
速度との関係を定量的に把握できれば、効果的な
補修方法を見出すことができるという観点から、
装入物降下に及ぼす損傷部分の影響について、以
下の実験を行つた。
In order to achieve the above purpose, the inventors of the present invention
We focused on the fact that there is a close relationship between the erosion of the inner wall of the furnace and the rate of descent of the charge charged into the blast furnace.In other words, we quantified the relationship between the position and size of the damaged and eroded part and the rate of descent of the charge. From the perspective that if we can understand the situation effectively, we can find effective repair methods.
The following experiment was conducted to examine the effect of damaged parts on the burden fall.
第１図は上記実験方法を説明するための図であ
る。図において、１は高炉の約1/37の全周模型で
あり、同図では炉口部とシヤフト部との境界部分
のみを示している。２は10×10×15mmの木片を耐
火物の代用として貼り付けた炉内壁、３はシヤフ
ト部（炉胸部）の上端、４はシヤフト部、５は炉
口部、６は損傷部、７は損傷部上端、Ｄは炉口内
径、ｈはシヤフト部上端３から損傷部上端７まで
の距離、Ｗは損傷部領域の高さ、ｔは炉壁の厚み
方向の損傷深さ、θは各測定点の円周方向角度、
αは損傷領域の円周方向広さを示す角度である。 FIG. 1 is a diagram for explaining the above experimental method. In the figure, reference numeral 1 is a model of the entire circumference of the blast furnace of approximately 1/37 scale, and the figure only shows the boundary between the furnace mouth and the shaft. 2 is the inner wall of the furnace with 10 x 10 x 15 mm wood pieces pasted as a substitute for refractories, 3 is the upper end of the shaft (furnace chest), 4 is the shaft, 5 is the furnace mouth, 6 is the damaged area, and 7 is the The upper end of the damaged part, D is the inner diameter of the furnace mouth, h is the distance from the upper end of the shaft part 3 to the upper end of the damaged part 7, W is the height of the damaged part area, t is the damage depth in the thickness direction of the furnace wall, θ is each measurement circumferential angle of the point,
α is an angle indicating the extent of the damaged area in the circumferential direction.
本実験は、まず、炉内壁２の木片の一部を取り
除いて損傷部６を形成し、該高炉１内に粒子径１
〜２mm程度の川砂を充填した。さらに、この川砂
を該高炉１の羽口部から排出しつつ、炉口部５か
ら着色された川砂をトレーサーとして垂直方向
（連続的）及び水平方向（間欠的）に送り込み、
高炉１内に流線と等時間線を同時に形成させた。 In this experiment, first, a part of the wood chips of the furnace inner wall 2 was removed to form a damaged part 6, and a particle size of 1
It was filled with about 2mm of river sand. Further, while discharging this river sand from the tuyere part of the blast furnace 1, colored river sand is fed in from the furnace mouth part 5 as a tracer in the vertical direction (continuously) and horizontal direction (intermittently),
Streamlines and isochronous lines were simultaneously formed in the blast furnace 1.
そして、本実験では、川砂の降下速度比の30度
毎の円周分布を、損傷領域角度α，ｈとＤとの比
ｈ／Ｄ，ＷとＤとの比Ｗ／Ｄ，ｔとＤとの比ｔ／
Ｄをそれぞれ変化させた場合について調べた。 In this experiment, the circumferential distribution of the river sand descending speed ratio every 30 degrees is expressed as the damage area angle α, the ratio h/D between h and D, the ratio W/D between W and D, and the ratio W/D between t and D. The ratio t/
The cases where D was varied were investigated.
第２図ないし第４図は上記実験結果を示す特性
図である。 FIGS. 2 to 4 are characteristic diagrams showing the above experimental results.
第３図ａないし第３図ｃは円周方向測定点θに
おける降下速度比と上記α，ｈ／Ｄ，Ｗ／Ｄとの
関係を示す特性図であり、まず、第３図ａは、
ｈ／Ｄ＝0.23，Ｗ／Ｄ＝0.28とし、損傷領域角度
αを変化させた場合の円周方向θにおける降下速
度比の変化を示す。同図からも明らかなように、
損傷領域角度αの増大に伴つて、降下速度比が増
大する領域も増大しているが、その絶対値は約
1.5付近に集中している。次に、第３図ｂは、α
＝90度、ｈ／Ｄ＝0.23とし、Ｗ／Ｄを変化させた
場合である。同図からも明らかなように、損傷部
上方における降下速度比は高さ方向の損傷領域Ｗ
の変化に応じて変化しているが、Ｗ／Ｄ≧0.39に
ある場合は、略一定となつている。また、第４図
は、炉壁の厚み方向の損傷深さｔとＤとの比ｔ／
Ｄと、降下速度比との関係を示す特性図であり、
この場合は、損傷深さｔが深いほど降下速度比は
大きくなることがわかる。 Figures 3a to 3c are characteristic diagrams showing the relationship between the descending speed ratio at the measurement point θ in the circumferential direction and the above α, h/D, and W/D.
It shows the change in the descending speed ratio in the circumferential direction θ when h/D=0.23 and W/D=0.28 and the damaged area angle α is changed. As is clear from the figure,
As the damage area angle α increases, the area where the descent speed ratio increases also increases, but its absolute value is approximately
It is concentrated around 1.5. Next, Fig. 3b shows α
= 90 degrees, h/D = 0.23, and W/D is changed. As is clear from the figure, the descending speed ratio above the damaged area is the damage area W in the height direction.
However, when W/D≧0.39, it remains approximately constant. FIG. 4 also shows the ratio t/D of damage depth t in the thickness direction of the furnace wall.
It is a characteristic diagram showing the relationship between D and the descent speed ratio,
In this case, it can be seen that the deeper the damage depth t is, the larger the descending speed ratio becomes.
一方、第３図ｃは、α＝90度、Ｗ／Ｄ＝0.28と
し、ｈ／Ｄを変化させた場合の降下速度比の変化
を示す。同図からも明らかなように、損傷部上端
７がシヤフト部上端３からｈ／Ｄ≦0.34の距離に
ある場合は、降下速度分布が不均一化し始め、
ｈ／Ｄがさらに減少すると、つまり損傷部上端７
がシヤフト部４の上端３に近くなると損傷領域上
方の降下速度比は著しく増大し、かつ損傷領域角
度αの略中央位置で最大下降速度比を示してい
る。 On the other hand, FIG. 3c shows the change in the descending speed ratio when α=90 degrees and W/D=0.28 and h/D is changed. As is clear from the figure, when the upper end 7 of the damaged part is at a distance of h/D≦0.34 from the upper end 3 of the shaft part, the descending speed distribution begins to become uneven,
When h/D further decreases, that is, the upper end of the damaged part 7
As it approaches the upper end 3 of the shaft portion 4, the descending speed ratio above the damaged area increases significantly, and shows the maximum descending speed ratio at approximately the center position of the damaged area angle α.
そして、第２図は、上記ｈ／Ｄと最大降下速度
比との関係を示す特性図である。同図によると、
ｈ／Ｄ比が小さくなるほど降下速度比が増大して
おり、特に、例えばｈ／Ｄ≦0.46の場合は、降下
速度比が急激に増加することがわかる。即ち、炉
壁２の損傷部６が、シヤフト部上端３に近づくほ
ど降下速度比を増大させ、円周バランスを不均一
にしている。従つて、このことから、本件発明者
らは、損傷部上端７から高炉１のシヤフト部上端
３までの距離ｈを測定し、該距離ｈと炉口部５の
内径Ｄとからｈ／Ｄを求め、降下速度比が急激に
上昇するｈ／Ｄを有する損傷領域部分を補修して
やれば、本発明の目的を達成できることに想到し
た。 FIG. 2 is a characteristic diagram showing the relationship between the h/D and the maximum descent speed ratio. According to the same figure,
It can be seen that as the h/D ratio decreases, the descending speed ratio increases, and in particular, when h/D≦0.46, the descending speed ratio increases rapidly. That is, the closer the damaged portion 6 of the furnace wall 2 is to the upper end 3 of the shaft portion, the higher the descending speed ratio becomes, making the circumferential balance uneven. Therefore, from this, the present inventors measured the distance h from the upper end 7 of the damaged part to the upper end 3 of the shaft part of the blast furnace 1, and calculated h/D from the distance h and the inner diameter D of the furnace mouth part 5. The inventors have come up with the idea that the object of the present invention can be achieved by repairing the damaged area having h/D where the descending speed ratio rapidly increases.
そこで、本願の第１発明は、高炉の炉内壁の損
傷領域を補修する方法において、損傷領域の上端
から高炉のシヤフト部上端までの距離ｈを計測
し、該距離ｈと炉口部の内径Ｄとから損傷領域位
置値Ｋ＝ｈ／Ｄを求め、該値Ｋが所定の基準値
K0以下の場合に、該損傷領域のＫ＝K0となる位
置より上方部分に不定形耐火物の吹き付けによる
補修を施すことを特徴としており、また第２発明
では、上記値Ｋが所定の基準値K0以下の場合に、
該損傷領域に上端位置から下方位置の順で不定形
耐火物の吹き付けを行うことを特徴としている。 Therefore, the first invention of the present application is a method for repairing a damaged area on the inner wall of a blast furnace, in which the distance h from the upper end of the damaged area to the upper end of the shaft part of the blast furnace is measured, and the distance h and the inner diameter D of the furnace mouth part are measured. The damaged area position value K=h/D is calculated from
In the second invention, when the above-mentioned value K is equal to or less than a predetermined value, the damaged area is repaired by spraying a monolithic refractory to the upper part of the damaged area from the position where K= K0 . If the reference value K is less than 0 ,
The method is characterized in that the monolithic refractory material is sprayed onto the damaged area in order from the upper end position to the lower position.
ここで本願発明における基準値K0は、本件発
明者らの実験装置においては0.46程度であつた
が、この基準値K0は高炉の形状、大きさ、装入
物の性状等によつて若干変化するので、予め実験
等によつて求めておく必要がある。 Here, the reference value K 0 in the present invention was about 0.46 in the experimental equipment of the present inventors, but this reference value K 0 may vary depending on the shape and size of the blast furnace, the properties of the charge, etc. Since it changes, it is necessary to find it in advance through experiments, etc.
本発明に係る高炉の炉壁補修方法によれば、損
傷領域の上端からシヤフト部上端までの距離ｈと
炉口部の内径Ｄとから損傷領域位置値Ｋ＝ｈ／Ｄ
を求め、該値Ｋが所定の基準値K0以下の場合に
該損傷領域を補修するようにしたので、上記基準
値K0以下の損傷領域を補修すべき範囲として明
確化できる。つまり、降下速度比増大に大きな影
響を与える損傷領域を重点的に補修できることと
なり、所定の予定休風時間内に健全な炉内壁を効
果的に生成することができ、降下速度比を安定化
して円周バランスを改善できる。また、この場合
第２発明では、上端位置から下方位置の順で不定
形耐火物の吹付けを行うようにしたので、さらに
補修効果の大きい部分から補修でき、与えられた
予定休風時間が短い場合でも、効果的な補修作業
を行うことができる。
According to the blast furnace wall repair method according to the present invention, the damaged area position value K=h/D is calculated from the distance h from the upper end of the damaged area to the upper end of the shaft part and the inner diameter D of the furnace mouth.
Since the damaged area is repaired when the value K is less than or equal to the predetermined reference value K 0 , the damaged area where the value K is less than or equal to the reference value K 0 can be clarified as the range to be repaired. In other words, it is possible to focus on repairing the damaged areas that have a large effect on increasing the descending speed ratio, and it is possible to effectively create a healthy reactor inner wall within the predetermined scheduled wind down time, thereby stabilizing the descending speed ratio. Circumferential balance can be improved. In addition, in this case, in the second invention, since the monolithic refractory is sprayed in the order from the upper end position to the lower position, the repair can be performed starting from the part where the repair effect is greater, and the given scheduled wind down time is shortened. Even in some cases, effective repair work can be carried out.
以下、本発明の実施例を図について説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
第５図は本発明の一実施例による高炉の炉壁補
修方法を実施するための熱間吹き付け装置を示
す。 FIG. 5 shows a hot spraying device for carrying out a method for repairing a blast furnace wall according to an embodiment of the present invention.
図において、１０は高炉本体であり、これのテ
ーパ状に形成されたシヤフト部１１の上部には炉
口部１２が接続されており、該炉口部１２の上方
にはマンホール１３が形成されている。そして、
１４は熱間吹き付け装置であり、図では上記高炉
本体１０内にはマンホール１３から挿入された吹
き付け作業状態を示している。この吹き付け装置
１４は、不定形耐火物を噴出する吹付けノズル１
５、該ノズル１５を支持するフレーム１６、吹付
けノズル１５を旋回、傾動駆動する駆動装置１７
から構成されている。また、１８は上記吹き付け
装置１４を昇降、取り込み、取り出しを行う操作
装置であり、これはウインチ１９とワイヤ２０と
からなつている。さらに、２１は上記吹き付け装
置１４の吹付けノズル１５に不定形耐火物を供給
するための供給装置である。 In the figure, reference numeral 10 denotes a blast furnace main body, and a furnace mouth part 12 is connected to the upper part of a shaft part 11 formed in a tapered shape, and a manhole 13 is formed above the furnace mouth part 12. There is. and,
Reference numeral 14 denotes a hot spraying device, which is inserted into the blast furnace main body 10 through the manhole 13 and is in a spraying operation state in the figure. This spray device 14 includes a spray nozzle 1 that sprays a monolithic refractory.
5. A frame 16 that supports the nozzle 15, and a drive device 17 that rotates and tilts the spray nozzle 15.
It consists of Reference numeral 18 denotes an operating device for lifting, lowering, taking in, and taking out the spraying device 14, and this is made up of a winch 19 and a wire 20. Furthermore, 21 is a supply device for supplying the monolithic refractory to the spray nozzle 15 of the spray device 14.
次に、上記吹き付け装置１４を用いて、本願の
第２発明の実施例方法によつて上記シヤフト部１
１内の炉壁損傷部２２を補修する場合について説
明する。 Next, using the spraying device 14, the shaft portion 1 is sprayed by the method according to the embodiment of the second invention of the present application.
A case where the damaged part 22 of the furnace wall in the furnace wall 1 is repaired will be explained.
本実施例の補修方法は、まず上記高炉１０の予
め予定された休風時間において、上記炉壁損傷部
２２の上端２２ａから高炉１０のシヤフト部上端
１１ａまでの距離h1を計測する。そして該距離h1
と炉口部１２の内径Ｄとから損傷領域位置値Ｋ即
ちh1／Ｄを求める。このh1／Ｄが所定の基準値
K0以下、例えば第２図に示す0.46より小さい値の
場合に、該損傷部２２を補修すべき領域と決定す
る。しかる後、上記第５図に示すように、熱間吹
き付け装置１４を炉内に挿入設置し、上記補修領
域２２の損傷部上端２２ａ位置から下方に向かつ
て上記熱間吹き付け装置１４により不定形耐火物
を噴射して、該損傷部２２を補修する。 The repair method of this embodiment first measures the distance h 1 from the upper end 22a of the damaged part of the furnace wall 22 to the upper end 11a of the shaft portion of the blast furnace 10 during a prescheduled wind down time of the blast furnace 10. and the distance h 1
The damage area position value K, that is, h 1 /D is determined from the and the inner diameter D of the furnace mouth 12. This h 1 /D is the predetermined reference value
If the value is less than K 0 , for example less than 0.46 shown in FIG. 2, the damaged portion 22 is determined to be an area to be repaired. Thereafter, as shown in FIG. 5, the hot spraying device 14 is inserted into the furnace, and the hot spraying device 14 moves downward from the upper end 22a of the damaged portion of the repair area 22 to form a monolithic refractory. The damaged part 22 is repaired by spraying a substance.
このように本実施例の炉壁補修方法によれば、
損傷部上端２２ａからシヤフト部上端１１ａまで
の距離h1と炉口部１２の内径Ｄとから損傷領域位
置Ｋ＝h1／Ｄを求め、該値Ｋが所定の基準値K0
以下の損傷部２２を補修領域としたので、補修す
べき損傷部２２を明確化できる。従つて、予定休
風時間内に健全な炉内壁を効果的に生成すること
ができるから、確実に円周バランスを改善でき
る。 As described above, according to the furnace wall repair method of this embodiment,
The damaged area position K=h 1 /D is calculated from the distance h 1 from the upper end 22a of the damaged part to the upper end 11a of the shaft part and the inner diameter D of the furnace mouth part 12, and this value K is determined as a predetermined reference value K 0
Since the following damaged parts 22 are set as repair areas, the damaged parts 22 to be repaired can be clarified. Therefore, since a healthy furnace inner wall can be effectively created within the scheduled wind down time, the circumferential balance can be reliably improved.
また、本実施例では、損傷部２２の上端２２ａ
位置から下方位置の順で不定形耐火物の吹付けを
行うようにしたので、円周バランスに大きな悪影
響を与える部分から順に補修することとなり、与
えられた予定休風時間が短い場合でも、補修作業
を確実に行うことができる。 Further, in this embodiment, the upper end 22a of the damaged part 22
Since the spraying of monolithic refractories is carried out in order from the lower position to the lower position, the parts that have the greatest negative impact on the circumferential balance are repaired in order, so even if the scheduled wind down time is short, the repair will be easier. Work can be done reliably.
こうしたことから、確実に円周バランスを維持
できることとなり、高炉操業の安定化ならびに炉
体寿命の延長に寄与できる。 As a result, the circumferential balance can be maintained reliably, contributing to stabilization of blast furnace operation and extension of the life of the furnace body.
第６図は本実施例の効果を説明するための特性
図であり、第６図ａは従来方法によるの補修前と
補修後の炉壁温度の円周分布を示し、第６図ｂは
本実施例方法による補修前と補修後の炉壁温度の
円周分布を示す。図中、曲線Ａ，A1は補修後の
円周バランスを示し、曲線Ｂ，B1は補修前の円
周バランスを示す。 Fig. 6 is a characteristic diagram for explaining the effect of this embodiment, Fig. 6a shows the circumferential distribution of the furnace wall temperature before and after repair by the conventional method, and Fig. 6b shows the circumferential distribution of the furnace wall temperature according to the conventional method. The circumferential distribution of furnace wall temperature before and after repair by the example method is shown. In the figure, curves A and A1 indicate the circumferential balance after repair, and curves B and B1 indicate the circumferential balance before repair.
第６図ａからも明らかなように、従来のように
補修範囲を明確にできていない場合は、補修前
B1と補修後A1とでは円周バランスが改善されて
いないことがわかる。それに対して、第６図ｂに
示すように、本実施例では、補修前Ｂと補修後Ａ
とでは、かなり均一な円周バランスが得られてい
る。 As is clear from Figure 6a, if the repair range cannot be clearly defined as in the past,
It can be seen that the circumferential balance has not been improved between B 1 and A 1 after repair. On the other hand, as shown in FIG. 6b, in this embodiment, B before repair and A after repair.
A fairly uniform circumferential balance is obtained.
なお、上記実施例では、損傷領域位置値Ｋが
K0以下となる損傷領域について上端から下方に
向けて補修するようにしたが、Ｋ≦K0の損傷領
域のうち、Ｋ＝K0となる位置より上方部分のみ
を補修するようにしてもよく、このようにしたの
が本願の第１発明であり、この場合も上記実施例
と同様の効果が得られる。 In the above embodiment, the damaged area position value K is
Although the damaged area where K 0 or less is repaired from the upper end downward, it is also possible to repair only the part above the position where K = K 0 among the damaged area where K≦K 0 . This is the first invention of the present application, and in this case as well, the same effects as in the above embodiment can be obtained.
以上のように本発明に係る高炉の炉壁補修方法
によれば、損傷領域の上端から高炉のシヤフト部
上端までの距離ｈと炉口部の内径Ｄとから損傷領
域位置値Ｋ＝ｈ／Ｄを求め、該値Ｋが所定の基準
値K0以下の場合に該損傷領域のＫ＝K0となる位
置より上方部分を補修し、又はこの場合に損傷領
域を上端位置から下方位置の順で補修するように
したので、補修すべき領域を明確化できるから、
予定休風時間を有効に利用して炉内壁を効果的に
生成でき、確実に円周バランスを改善でき、その
結果高炉操業を安定化できる効果がある。
As described above, according to the blast furnace wall repair method according to the present invention, the damaged area position value K=h/D is determined from the distance h from the upper end of the damaged area to the upper end of the shaft part of the blast furnace and the inner diameter D of the furnace mouth. If the value K is less than a predetermined reference value K0 , repair the damaged area above the position where K= K0 , or in this case, repair the damaged area from the upper end position to the lower position. Since I decided to repair it, I can clarify the area that needs to be repaired.
By effectively utilizing the scheduled wind down time, the furnace inner wall can be effectively formed, the circumferential balance can be reliably improved, and as a result, the blast furnace operation can be stabilized.
第１図ないし第４図は本発明の成立過程を説明
するための図であり、第１図ａはその実験用模型
高炉の断面平面図、第１図ｂはその一部を示す断
面側面図、第２図はその実験結果を示すｈ／Ｄと
降下速度比との関係を示す特性図、第３図ａない
し第３図ｃはそれぞれ降下速度比の円周分布を示
す特性図、第４図は炉壁の損傷深さと降下速度比
との関係を示す特性図、第５図は本発明の一実施
例による高炉の炉壁補修方法を実施するための熱
間吹き付け装置を示す概略構成図、第６図ａは従
来方法による補修結果を説明するための温度の円
周分布図であり、第６図ｂは本実施例の補修方法
による円周分布図である。
図において、１は高炉、２は炉内壁、３はシヤ
フト部上端、４はシヤフト部、５は炉口部、６は
損傷部（損傷領域）、７は損傷部上端、ｈは損傷
領域の上端からシヤフト部上端までの距離、Ｄは
炉口部内径である。
Figures 1 to 4 are diagrams for explaining the process of establishing the present invention, where Figure 1a is a cross-sectional plan view of the experimental model blast furnace, and Figure 1b is a cross-sectional side view showing a part of it. , Fig. 2 is a characteristic diagram showing the relationship between h/D and descending speed ratio showing the experimental results, Figs. 3 a to 3 c are characteristic charts showing the circumferential distribution of descending speed ratio, and Fig. 4 Fig. 5 is a characteristic diagram showing the relationship between the damage depth of the furnace wall and the descent rate ratio, and Fig. 5 is a schematic configuration diagram showing a hot spraying device for carrying out the blast furnace wall repair method according to an embodiment of the present invention. , FIG. 6a is a circumferential distribution diagram of temperature for explaining the repair results by the conventional method, and FIG. 6b is a circumferential distribution diagram of the temperature by the repair method of this embodiment. In the figure, 1 is the blast furnace, 2 is the furnace inner wall, 3 is the upper end of the shaft part, 4 is the shaft part, 5 is the furnace mouth part, 6 is the damaged part (damaged area), 7 is the upper end of the damaged part, h is the upper end of the damaged area The distance from to the upper end of the shaft, D is the inner diameter of the furnace mouth.
Claims (1)
付けによつて補修する高炉の炉壁補修方法におい
て、損傷領域の上端から高炉のシヤフト部上端ま
での距離ｈを計測し、該距離ｈと炉口部の内径Ｄ
とから損傷領域位置値Ｋ＝ｈ／Ｄを求め、該値Ｋ
が所定の基準値K0以下の場合に、該損傷領域の
Ｋ＝K0となる位置より上方部分に上記吹き付け
を行うことを特徴とする高炉の炉壁補修方法。 ２ 高炉の炉内壁の損傷領域を不定形耐火物の吹
付けによつて補修する高炉の炉壁補修方法におい
て、損傷領域の上端から高炉のシヤフト部上端ま
での距離ｈを計測し、該距離ｈと炉口部の内径Ｄ
とから損傷領域位置値Ｋ＝ｈ／Ｄを求め、該値Ｋ
が所定の基準値K0以下の場合に、該損傷領域に
上端位置から下方位置の順で上記吹付けを行うこ
とを特徴とする高炉の炉壁補修方法。[Claims] 1. In a blast furnace wall repair method for repairing a damaged area on the inner wall of a blast furnace by spraying monolithic refractories, the distance h from the upper end of the damaged area to the upper end of the shaft part of the blast furnace is Measure the distance h and the inner diameter D of the furnace mouth.
Find the damaged area position value K=h/D from
1. A method for repairing a blast furnace wall, characterized in that, when K is less than a predetermined reference value K 0 , the above-mentioned spraying is performed on a portion of the damaged area above the position where K = K 0 . 2 In a blast furnace wall repair method in which a damaged area of the inner wall of a blast furnace is repaired by spraying monolithic refractories, the distance h from the top of the damaged area to the top of the shaft of the blast furnace is measured, and the distance h and the inner diameter D of the furnace mouth
Find the damaged area position value K=h/D from
1. A method for repairing a blast furnace wall, characterized in that the above-mentioned spraying is performed on the damaged area in order from the upper end position to the lower position when the damage area is below a predetermined reference value K 0 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4597187A JPS63317608A (en) | 1987-02-28 | 1987-02-28 | Method for repairing furnace wall in blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4597187A JPS63317608A (en) | 1987-02-28 | 1987-02-28 | Method for repairing furnace wall in blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63317608A JPS63317608A (en) | 1988-12-26 |
| JPH0322444B2 true JPH0322444B2 (en) | 1991-03-26 |
Family
ID=12734110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4597187A Granted JPS63317608A (en) | 1987-02-28 | 1987-02-28 | Method for repairing furnace wall in blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63317608A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008223120A (en) * | 2007-03-15 | 2008-09-25 | Nippon Steel Corp | Evaluation method of furnace wall surface above the blast furnace shaft |
| JP2008223121A (en) * | 2007-03-15 | 2008-09-25 | Nippon Steel Corp | How to repair the upper furnace wall of the blast furnace shaft |
-
1987
- 1987-02-28 JP JP4597187A patent/JPS63317608A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63317608A (en) | 1988-12-26 |
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