JP2012207270A - Method of measuring residual thickness of blast furnace stave - Google Patents
Method of measuring residual thickness of blast furnace stave Download PDFInfo
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- JP2012207270A JP2012207270A JP2011073763A JP2011073763A JP2012207270A JP 2012207270 A JP2012207270 A JP 2012207270A JP 2011073763 A JP2011073763 A JP 2011073763A JP 2011073763 A JP2011073763 A JP 2011073763A JP 2012207270 A JP2012207270 A JP 2012207270A
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Abstract
Description
本発明は、高炉の鉄皮に固定されたステーブの損耗を測定する方法に関する。 The present invention relates to a method for measuring the wear of a stave fixed to a blast furnace core.
本発明が対象とする高炉ステーブの残存厚測定方法については、従来から種々の提案がなされており、例えば、特開昭６１−２６４１１０号公報（下記特許文献1）には、ステーブの炉外側の面（表面）に超音波探触子を接触せしま、ステーブの表面と炉内側の面（背面）の厚みを超音波で測定する方法が記載されている。 Various proposals have been made for the method for measuring the remaining thickness of a blast furnace stave targeted by the present invention. For example, Japanese Patent Application Laid-Open No. 61-264110 (Patent Document 1) discloses a method for measuring the remaining thickness of a blast furnace stave. A method is described in which an ultrasonic probe is brought into contact with a surface (surface), and the thickness of the surface of the stave and the surface (back surface) inside the furnace is measured with ultrasonic waves.
しかし、この特許文献１の方法は、ステーブの背面から表面までの厚さが２００mm程度あることから下記イ）ロ）の原因により測定精度が悪いという問題点があった。
イ）ステーブの背面は損耗により凹凸状態であることから、入射した超音波が乱反射して探触子で測定可能な反射超音波（エコー）が少ない。
ロ）ステーブは鋳物製であることから反射波の減衰が大きい。
However, the method of Patent Document 1 has a problem that the measurement accuracy is poor due to the following a) b) because the thickness from the back surface to the surface of the stave is about 200 mm.
B) Since the back surface of the stave is uneven due to wear, the reflected ultrasonic waves (echoes) that can be measured with the probe are irregularly reflected by the incident ultrasonic waves.
B) Because the stave is made of cast metal, the reflected wave is greatly attenuated.
また、特開昭６３−０７３０８８公報（下記特許文献２）には、ステーブにステーブ厚みと同じ長さのマーカーを高炉炉内側のステーブ表面に先端を合わせて埋没させておき、超音波を利用してその厚みを測定する方法が記載されている。 In Japanese Patent Laid-Open No. 63-073088 (Patent Document 2 below), a marker having the same length as the thickness of the stave is embedded in the stave on the stave surface inside the blast furnace and the ultrasonic wave is used. A method for measuring the thickness of the iron is described.
しかし、この特許文献２の方法は、イ）〜ハ）のような問題点があった。
イ）ステーブに予めマーカーを埋め込むための加工が必要となり、ステーブの製造コストが高い。
ロ）加工したマーカー埋め込み用の孔の周辺が強度的に弱くなり、この部分の損耗が他の部分より速くなるおそれがある。
ハ）既設の高炉のステーブに適用することは困難である。
However, the method of Patent Document 2 has the following problems (i) to (c).
B) Processing to embed markers in advance in the stave is necessary, and the stave manufacturing cost is high.
B) The periphery of the processed marker embedding hole is weak in strength, and there is a possibility that the wear of this part may be faster than other parts.
C) It is difficult to apply to the existing blast furnace stave.
本発明は、高炉の鉄皮に固定されたステーブの損耗を正確に測定する高炉ステーブの残存厚測定方法を提供することを課題とする。 It is an object of the present invention to provide a method for measuring the remaining thickness of a blast furnace stave that accurately measures the wear of the stave fixed to the blast furnace core.
本発明は、前述のような従来技術の問題点を解決するために鋭意検討の結果なされたものであり、その要旨とするところは特許請求の範囲に記載した通りの下記内容である。 The present invention has been made as a result of intensive studies in order to solve the problems of the prior art as described above, and the gist of the present invention is as follows.
（１）高炉の鉄皮に固定されたステーブの損耗を測定するであって、前記ステーブに冷却水を流す水路から冷却水を抜き取り、該水路内に超音波探触子を差し込んで水路の炉内側の面に接触させて、前記水路の炉内側の面とステーブの背面との厚さ（Ｔ）を測定することを特徴とする高炉ステーブの残存厚測定方法。
（２）前記超音波探触子は、樹脂製のソフト探触子とすることを特徴とする（１）に記載の高炉ステーブの残存厚測定方法。
(1) Measuring the wear of a stave fixed to the iron shell of a blast furnace, extracting cooling water from a water channel through which cooling water flows to the stave, inserting an ultrasonic probe into the water channel, and A method for measuring the remaining thickness of a blast furnace stave, wherein the thickness (T) between the inner surface of the water channel and the back surface of the stave is measured by contacting with the inner surface.
(2) The method for measuring a remaining thickness of a blast furnace stave according to (1), wherein the ultrasonic probe is a soft probe made of resin.
＜作用＞
（１）の発明によれば、水路内に超音波測定素子を差し込んで、該素子を水路の炉内側の面に押し付けて測定するので、測定厚みが１００ｍｍ以内の部分を測定するので、測定データの精度が高い。
（２）の発明によれば、超音波探触子として、樹脂製のソフト探触子を用いるので、水路の炉内側の面が曲率を有する場合であっても探触子が水路の炉内側の面に密着させて正確に測定することができる。
<Action>
According to the invention of (1), since an ultrasonic measurement element is inserted into the water channel and the element is pressed against the inner surface of the water channel and measured, the measurement thickness is measured within 100 mm. High accuracy.
According to the invention of (2), since the soft probe made of resin is used as the ultrasonic probe, even if the surface inside the furnace of the water channel has a curvature, the probe is inside the furnace of the water channel. It is possible to measure accurately by bringing it into close contact with the surface.
本発明によれば、高炉の鉄皮に固定されたステーブの損耗を測定する箇所および使用する探触子を工夫することによって、高炉の鉄皮に固定されたステーブの損耗を正確に測定する高炉ステーブの残存厚測定方法を提供することができるうえ、ステーブ自体の加工が不要であり、既設の高炉のステーブにも適用できるなど産業上有用な著しい効果を奏する。 According to the present invention, the blast furnace for accurately measuring the wear of the stave fixed to the iron core of the blast furnace by devising the location for measuring the wear of the stave fixed to the iron skin of the blast furnace and the probe used. In addition to providing a method for measuring the remaining thickness of the stave, it is not necessary to process the stave itself, and the present invention can be applied to existing blast furnace staves, and has significant industrially useful effects.
本発明を実施するための形態について、図１〜図６を用いて詳細に説明する。
図１〜図６において、１は鉄皮、２はステーブ、３は水路、４はポンプ、５は給水ドラム、６は連結管、７はバルブ、８はプローブ、９は探触子、１０は固定台、１１は測定器、１２はケーブルを示す。
The form for implementing this invention is demonstrated in detail using FIGS. 1-6.
1 to 6, 1 is an iron skin, 2 is a stave, 3 is a water channel, 4 is a pump, 5 is a water supply drum, 6 is a connecting pipe, 7 is a valve, 8 is a probe, 9 is a probe, and 10 is a probe. A fixed base, 11 is a measuring instrument, and 12 is a cable.
図１は、本発明を適用する高炉ステーブを例示する図である。図１に示すように、ステーブ２は高炉のシャフト部の高さ方向に連なった状態で存在しており、その内部に配置された水路３に冷却水を流して、高炉の鉄皮１を保護する装置である。 FIG. 1 is a diagram illustrating a blast furnace stave to which the present invention is applied. As shown in FIG. 1, the stave 2 exists in a state of being connected in the height direction of the shaft portion of the blast furnace, and the cooling water is supplied to the water channel 3 disposed therein to protect the iron core 1 of the blast furnace. It is a device to do.
図２は、本発明を適用する高炉ステーブの冷却方法を例示する図である。図２（a）に示す通常時は、ステーブ２の上部に設けられた給水ドラムのバルブを開いて水路３に冷却水を流している。また、図２（b）に示す水切り時は、ステーブ２の上部に設けられた給水ドラムのバルブを閉じステーブ下部のバルブを開いて水路３から冷却水排水する。 FIG. 2 is a diagram illustrating a method for cooling a blast furnace stave to which the present invention is applied. In the normal state shown in FIG. 2 (a), the valve of a water supply drum provided on the upper portion of the stave 2 is opened to allow cooling water to flow through the water channel 3. Further, when draining as shown in FIG. 2 (b), the valve of the water supply drum provided at the upper part of the stave 2 is closed and the valve at the lower part of the stave is opened to drain the cooling water from the water channel 3.
図３は、本発明を適用する高炉ステーブの冷却方法を説明する図であり、上下の水路３は、連結管６により連結されており、この連結管6にはバルブ７が設けられている。 FIG. 3 is a view for explaining a cooling method of the blast furnace stave to which the present invention is applied. The upper and lower water channels 3 are connected by a connecting pipe 6, and a valve 7 is provided in the connecting pipe 6.
図４は、本発明に用いる超音波測定器を例示する図である。図４に示すように、本発明に用いる超音波測定器は、測定器１１にケーブル１２を介してプローブ８が設けられており、その先端に探触子９を有する。 FIG. 4 is a diagram illustrating an ultrasonic measuring instrument used in the present invention. As shown in FIG. 4, in the ultrasonic measuring instrument used in the present invention, a probe 8 is provided on a measuring instrument 11 via a cable 12 and has a probe 9 at the tip thereof.
図５は、本発明の高炉ステーブの残存厚測定方法を例示する図であり、図６は、その詳細図である。図５に示すように、本発明の高炉ステーブの残存厚測定方法は、ステーブ２に冷却水を流す水路３から冷却水を抜き取り、該水路３内に超音波探触子９を差し込んで、前記水路３の炉内側底面とステーブ２の炉内側表面との厚さ（Ｔ）を測定することを特徴とする。水路の炉内側の面とステーブの背面との厚さ（Ｔ）が１００ｍｍ以内の部分を測定するので、測定データの精度が高い。 FIG. 5 is a diagram illustrating a method for measuring the remaining thickness of a blast furnace stave according to the present invention, and FIG. 6 is a detailed diagram thereof. As shown in FIG. 5, the method for measuring the remaining thickness of a blast furnace stave according to the present invention extracts cooling water from a water channel 3 through which cooling water flows to the stave 2, inserts an ultrasonic probe 9 into the water channel 3, and The thickness (T) between the furnace inner bottom surface of the water channel 3 and the furnace inner surface of the stave 2 is measured. Since the portion where the thickness (T) between the inner surface of the water channel and the back surface of the stave is 100 mm or less is measured, the accuracy of the measurement data is high.
ステーブ２の水路の炉内側の面に超音波探触子９を押し当てて水路の炉内側の面とステーブの背面との厚さ（Ｔ）を測定するメリットとしては図５及び図６のように水路３の表面からステーブの背面までの距離は約７５ｍｍと薄いため、超音波の減衰しやすい銅ステーブにおいても超音波探傷を精度よく実施できる。 The merit of measuring the thickness (T) between the inner surface of the water channel and the back surface of the stave by pressing the ultrasonic probe 9 against the inner surface of the water channel of the stave 2 is as shown in FIGS. In addition, since the distance from the surface of the water channel 3 to the back surface of the stave is as thin as about 75 mm, ultrasonic flaw detection can be carried out with high accuracy even on a copper stave that is susceptible to ultrasonic attenuation.
本発明における高炉ステーブの残存厚測定方法における測定手順を下記に示す。まず、高炉１内への送風を休風し、図２のステーブ２内に存在する水路３から水路３内に流れる水を抜き取る作業を実施する。具体的には、図２のようにポンプ４により循環する冷却水を給水ドラム５の下のバルブを「閉」にし、ステーブ２の下のバルブを「開」にすることにより抜き取りを実施する。 The measurement procedure in the method for measuring the remaining thickness of the blast furnace stave in the present invention is shown below. First, air blowing into the blast furnace 1 is stopped, and an operation of extracting water flowing into the water channel 3 from the water channel 3 existing in the stave 2 in FIG. 2 is performed. Specifically, the cooling water circulated by the pump 4 as shown in FIG. 2 is extracted by closing the valve below the water supply drum 5 and opening the valve below the stave 2.
水抜きが終わった後、図４のように上下のステーブを繋ぐ連絡管６のバルブ７を「開」にし、超音波探傷測定を実施するための探触子９を取付けたプローブ８を装入できるように管内を開放し、探触子９を図５のように水路３の炉内側底面に押し付けた状態で、前回の測定残存厚を基に今回の残存厚を予測し、この予測残存厚に応じて、周波数一定の状態で超音波の音速を調整することにより超音波の波長調整を実施する。設定終了後、探触子９より超音波を発生させ、反射波を検知するまでの時間から水路３の炉内側底面とステーブ２の炉内表面との間の厚み(Ｔ)を測定する。測定終了後、プローブ８を引き抜き、連絡管６のバルブ７を「閉」にし、図２（a）の通常時の状態に戻して、再度ステーブの水路３に冷却水を通水する。 After draining, as shown in FIG. 4, the valve 7 of the connecting tube 6 that connects the upper and lower staves is opened, and the probe 8 with the probe 9 attached for performing ultrasonic flaw detection is inserted. The pipe is opened so that the probe 9 can be pressed against the bottom surface of the inner surface of the water channel 3 as shown in FIG. 5, and the current residual thickness is predicted based on the previous measured residual thickness. Accordingly, the wavelength of the ultrasonic wave is adjusted by adjusting the sound velocity of the ultrasonic wave in a state where the frequency is constant. After the setting is completed, an ultrasonic wave is generated from the probe 9, and the thickness (T) between the furnace inner bottom surface of the water channel 3 and the in-furnace surface of the stave 2 is measured from the time until the reflected wave is detected. After completion of the measurement, the probe 8 is pulled out, the valve 7 of the connecting pipe 6 is “closed”, the normal state shown in FIG. 2A is restored, and the cooling water is passed through the water channel 3 of the stave again.
本発明に用いる超音波探傷測定装置の構成を下記に示す。図５のように先端部に探触子９を固定台１０で固定したプローブ８と、探触子９にケーブル１１を介して接続した測定器１０から構成される。探触子９は、例えばポリフッ化ビニリデンなどの樹脂製のソフト探触子とすることが好ましく、このため、水路３の炉内側底面が湾曲面でもきっちりと表面に探触子９を密着させることができる。 The configuration of the ultrasonic flaw detection apparatus used in the present invention is shown below. As shown in FIG. 5, the probe 8 includes a probe 8 fixed to a distal end with a fixed base 10 and a measuring instrument 10 connected to the probe 9 via a cable 11. The probe 9 is preferably a soft probe made of a resin such as polyvinylidene fluoride. For this reason, the probe 9 is closely attached to the surface even if the bottom surface inside the furnace of the water channel 3 is a curved surface. Can do.
超音波の周波数は超音波が減衰し易い鋳物銅ステーブの測定を実施するため、0.5MHzとした。この実施形態により、実際にステーブ２をボウリングした際のステーブ損耗状況と比較してほぼ同等の厚みとなったことから、本発明によれば、高炉の鉄皮に固定されたステーブの損耗を正確に測定する高炉ステーブの残存厚測定方法を提供することができ、本発明の効果が確認された。 The frequency of the ultrasonic wave was set to 0.5 MHz in order to measure a cast copper stave in which the ultrasonic wave is easily attenuated. According to this embodiment, since the thickness of the stave is substantially the same as that when the stave 2 is actually bowled, according to the present invention, the wear of the stave fixed to the iron core of the blast furnace is accurately measured. Thus, it is possible to provide a method for measuring the remaining thickness of the blast furnace stave, and the effect of the present invention has been confirmed.
１ 鉄皮
２ ステーブ
３ 水路
４ ポンプ
５ 給水ドラム
６ 連結管
７ バルブ
８ プローブ
９ 探触子
１０ 固定台
１１ 測定器
１２ ケーブル
Ｔ 水路の炉内側の面とステーブの背面との厚さ
DESCRIPTION OF SYMBOLS 1 Iron skin 2 Stave 3 Water channel 4 Pump 5 Water supply drum 6 Connection pipe 7 Valve 8 Probe 9 Probe 10 Fixing base 11 Measuring device 12 Cable T Thickness of the inner surface of the water channel and the back surface of the stave
Claims (2)
The method for measuring the remaining thickness of a blast furnace stave according to claim 1, wherein the ultrasonic probe is a soft probe made of resin.
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| JP2011073763A JP5569451B2 (en) | 2011-03-30 | 2011-03-30 | Blast furnace stave residual thickness measurement method |
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| JP2011073763A JP5569451B2 (en) | 2011-03-30 | 2011-03-30 | Blast furnace stave residual thickness measurement method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052409A (en) * | 2016-07-18 | 2016-10-26 | 宗品禾 | Measurement controller and measurement control method for smelter |
| JP2019526709A (en) * | 2016-09-06 | 2019-09-19 | ポスコＰｏｓｃｏ | Stave thickness measuring device |
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| JP2001226707A (en) * | 1999-12-10 | 2001-08-21 | Sumitomo Metal Ind Ltd | Method for inspecting stave cooler, device for the same, method for inspecting multilayered structure consisting of pipe as core and device for the same |
| JP2001294918A (en) * | 2000-04-13 | 2001-10-26 | Nippon Steel Corp | Method for measuring thickness of refractories in furnace |
| JP2002275515A (en) * | 2001-03-21 | 2002-09-25 | Nkk Corp | Stave and method for measuring thickness of stave |
| JP2008256589A (en) * | 2007-04-06 | 2008-10-23 | Nippon Steel Corp | Terminal for thickness measurement of refractory material, and thickness measuring method of the refractory material |
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| JPS5660753U (en) * | 1979-10-12 | 1981-05-23 | ||
| JPS61264110A (en) * | 1985-05-17 | 1986-11-22 | Kawasaki Steel Corp | Detection of wear of blast furnace stave |
| JP2001226707A (en) * | 1999-12-10 | 2001-08-21 | Sumitomo Metal Ind Ltd | Method for inspecting stave cooler, device for the same, method for inspecting multilayered structure consisting of pipe as core and device for the same |
| JP2001294918A (en) * | 2000-04-13 | 2001-10-26 | Nippon Steel Corp | Method for measuring thickness of refractories in furnace |
| JP2002275515A (en) * | 2001-03-21 | 2002-09-25 | Nkk Corp | Stave and method for measuring thickness of stave |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106052409A (en) * | 2016-07-18 | 2016-10-26 | 宗品禾 | Measurement controller and measurement control method for smelter |
| CN106052409B (en) * | 2016-07-18 | 2018-04-24 | 宗品禾 | A kind of smelting furnace Mersure Controler and measurement control method |
| JP2019526709A (en) * | 2016-09-06 | 2019-09-19 | ポスコＰｏｓｃｏ | Stave thickness measuring device |
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| JP5569451B2 (en) | 2014-08-13 |
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