JP3520535B2 - Blast furnace tap hole depth measurement method - Google Patents
Blast furnace tap hole depth measurement methodInfo
- Publication number
- JP3520535B2 JP3520535B2 JP27069193A JP27069193A JP3520535B2 JP 3520535 B2 JP3520535 B2 JP 3520535B2 JP 27069193 A JP27069193 A JP 27069193A JP 27069193 A JP27069193 A JP 27069193A JP 3520535 B2 JP3520535 B2 JP 3520535B2
- Authority
- JP
- Japan
- Prior art keywords
- hole
- drill
- blast furnace
- gold rod
- tap hole
- 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 - Fee Related
Links
Landscapes
- Blast Furnaces (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高炉出銑口の孔深さ
（開孔長さ）を測定する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring the hole depth (opening length) of a blast furnace tap hole.
【０００２】[0002]
【従来の技術】出銑口は、溶銑溶滓を高炉から排出する
所で、高炉の中では鉄皮でシールされていない唯一の場
所である。そして出銑口孔深さ（出銑量９０００〜１０
０００／ｄの高炉で３．５〜４．５ｍと言われる）の測
定と管理は、高炉の操業にとって非常に重要なものであ
る。出銑時、溶銑は炉内のガス圧力により、炉外に押し
出されるが、溶銑が出銑口の孔の中を通過する際、圧力
損失が発生する。その圧力損失は出銑口孔深さ、すなわ
ち出銑口の開孔長さに比例して増大するので、単位時間
当たりの出銑量（以下出銑速度という）は、炉内のガス
圧力と出銑中の圧力損失が均衡する点で決まる。もし出
銑速度を高炉の溶銑生成速度と同じにすることができれ
ば、連続出銑操業ができるようになるが、実際には出銑
の進行につれて出銑口孔の耐火物が溶損し、孔径が拡大
するので、出銑速度が変り、連続出銑操業は困難であ
る。2. Description of the Related Art The taphole is the place where the molten pig iron is discharged from the blast furnace and is the only place in the blast furnace that is not sealed by a steel shell. And tap hole depth (amount of tapping 9000-10
Measurement and control of 000 / d blast furnace is said to be 3.5-4.5 m) is very important for blast furnace operation. At the time of tapping, the hot metal is pushed out of the furnace by the gas pressure in the furnace, but when the hot metal passes through the hole of the tap hole, a pressure loss occurs. Since the pressure loss increases in proportion to the taphole depth, that is, the length of taphole opening, the amount of tapping per unit time (hereinafter referred to as tapping speed) is the same as the gas pressure in the furnace. It is determined by the balance of pressure loss during tapping. If the tapping speed can be made the same as the hot metal production rate of the blast furnace, continuous tapping operation will be possible, but in reality, as the tapping progresses, the refractory material in the tapping hole will melt and the hole diameter will change. Since it expands, the tapping speed changes and continuous tapping operation is difficult.
【０００３】しかしながら、出銑口孔深さの管理の正確
さが向上すれば、出銑速度を高炉の溶銑生成速度に近ず
けることが可能になり、１回当たりの出銑量を多くし
て、出銑回数（回／日）を減らすことができ、操業者の
作業負荷軽減、出銑口塞ぎ用のマッド材の節減等、大き
なメリットを得ることができる。実際の出銑口孔深さの
管理は、出銑口孔塞ぎ時、孔に充填するマッド量を増減
することで行う。すなわち、出銑口開孔時に出銑口孔深
さを測定し、孔深さ不足の場合は、マッド量を増やして
孔深さを長くし、孔深さが過大の場合はマッド量を減ら
して、孔深さを短くする。つまり、出銑口孔の閉塞時に
充填するマッドを決定する指標として、出銑口孔深さの
正確な測定が必要なのである。However, if the accuracy of the control of the taphole depth is improved, the tapping speed can be made closer to the hot metal production rate of the blast furnace, and the tapping amount per one time can be increased. Therefore, the number of times of tapping (times / day) can be reduced, and great advantages can be obtained, such as reduction of the workload of the operator and saving of mud material for closing the taphole. The actual depth of the tap hole is controlled by increasing or decreasing the amount of mud to fill the hole when closing the tap hole. That is, the tap hole depth is measured during tap hole opening, and if the hole depth is insufficient, increase the mud amount to increase the hole depth, and if the hole depth is excessive, decrease the mud amount. To reduce the hole depth. That is, it is necessary to accurately measure the depth of the taphole as an index for determining the mud to be filled when the taphole is closed.
【０００４】図３に、従来の出銑口開孔方法を示す。削
孔具２（ドリル又は金棒）が削孔機３に保持され、回転
と打撃を与えられることによって、炉壁１の出銑口４を
開孔する。削孔機３は、ガイドセル５の下に吊りさげら
れ、ガイドセル５上に設置されたフィード用エアモータ
６（空気圧 ４〜８ｋｇ／ｃｍ2 ）によってチェーンホ
イール７及びチェーン８を介して、前進、後退する。前
進、後退距離は、削孔機の側面に目盛板を設け、操作者
が読み取るようにしていた。従って、出銑口孔深さの測
定は、開孔を開始し又は終了した時の削孔機３の位置を
操作者が上記目盛板から読み取ることで行われていた。
その際、開孔終了は、金棒（通常３６〜４２ｍｍφ）又
はドリルで出銑口孔中のマッドを掘削中に急速な掘削速
度になったことを操作者が感知して、その時点を開孔終
了と判定していた。FIG. 3 shows a conventional taphole opening method. The drilling tool 2 (drill or gold rod) is held by the drilling machine 3 and is rotated and hit to open the tap hole 4 of the furnace wall 1. The drilling machine 3 is hung below the guide cell 5 and moved forward by the feed air motor 6 (air pressure 4 to 8 kg / cm 2 ) installed on the guide cell 5 via the chain wheel 7 and the chain 8. fall back. The forward and backward distances were read by the operator by providing a scale plate on the side surface of the boring machine. Therefore, the depth of the tap hole has been measured by the operator reading the position of the boring machine 3 at the start or end of the opening from the scale plate.
At that time, when the drilling is completed, the operator senses that the drilling speed has reached a rapid rate during drilling the mud in the tap hole with a gold rod (usually 36 to 42 mmφ) or a drill, and the drilling is performed at that time. It was determined to be finished.
【０００５】一方、出銑口孔深さを自動的に測定する技
術としては、特開平４−３７１５０７号公報に開示され
た出銑口開孔機がある。この機械は、従来削孔機の前
進、後退をエアモータで行っていたものを油圧アクチュ
エタに改め、その油圧アクチュエータに供給した圧油の
流量、圧力信号を利用するものである。しかしながら、
従来の方法は、操作者が掘削速度の変化を感覚的に捉
え、また掘削距離を目測するといったことをしていたの
で、人による感覚のばらつき、目測の不正確さという問
題があった。さらに、特開平４−３７１５０７号公報記
載の開孔機で測定するには、開孔機に油圧のアクチュエ
ータを使用しなければならず、既存の開孔機のエアモー
タを油圧に改造するには、多大の費用を必要とするとい
う問題もあった。また、既存のエアモータの駆動に使用
している圧縮空気で自動測定を試みても、空気では油圧
のような精度が出ないため、正確な測定はできないと考
えられる。On the other hand, as a technique for automatically measuring the depth of the tap hole, there is a tap hole opener disclosed in Japanese Patent Laid-Open No. 4-371507. This machine uses a hydraulic actuator instead of an air motor to move the boring machine forward and backward, and uses the flow rate and pressure signal of the pressure oil supplied to the hydraulic actuator. However,
In the conventional method, the operator senses the change in the excavation speed and visually measures the excavation distance, so that there is a problem in that the sense varies from person to person and the accuracy of the eye measurement is inaccurate. Furthermore, in order to perform measurement with the hole punching machine disclosed in JP-A-4-371507, a hydraulic actuator must be used for the hole punching machine, and in order to convert the air motor of the existing hole punching machine into hydraulic pressure, There was also the problem of requiring a great deal of money. In addition, even if an automatic measurement is attempted with compressed air used to drive an existing air motor, it is considered that accurate measurement cannot be performed because air does not provide accuracy like hydraulic pressure.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、かかる事情
を鑑み、従来の開孔機をそのまま使用して安価に、且つ
精度の高い出銑口孔深さの測定方法を提供することを目
的とする。SUMMARY OF THE INVENTION In view of such circumstances, it is an object of the present invention to provide an inexpensive and highly accurate method for measuring the depth of a taphole by using a conventional perforator as it is. And
【０００７】[0007]
【課題を解決するための手段】発明者は、上記目的を達
成するため鋭意検討を行い、従来は開孔機の操作者が実
施していた判断を、削孔機の前進、後退に用いるスプロ
ケットの回転数及び回転速度の測定値ですることに着眼
した。つまり、削孔具の金棒又はドリルの先端が出銑口
を封鎖しているマッド材を貫通したことを上記スプロケ
ットの回転数及び回転速度の測定値で検知し、その検知
時期と前記測定値を演算処理して、出銑口入口から貫通
位置までの距離を求めるものである。Means for Solving the Problems The inventor has conducted extensive studies in order to achieve the above object, and the sprocket used for the forward and backward movements of the drilling machine is determined by the operator of the drilling machine. We focused on the measured values of the number of rotations and the rotation speed. That is, the fact that the tip of the metal rod or drill of the drilling tool has penetrated the mud material that closes the tap hole is detected by the measurement value of the rotation speed and rotation speed of the sprocket, and the detection time and the measurement value are The distance from the entrance of the taphole to the penetration position is calculated by arithmetic processing.
【０００８】すなわち、本発明は、マッド材で封鎖した
高炉出銑口を、フィード用チェーンを介して、エアモー
タで前進、後退するガイドセルに吊下げた削孔機に、ド
リル又は金棒を取付け、その回転又は打撃によって開孔
するにあたり、上記フィード用チェーンに連接したスプ
ロッケトの数秒毎の回転数を測定し、その測定値を予じ
め定めた設定値と比較してドリル又は金棒の先端がマッ
ド材を貫通したことを検知し、その検知時期と前記測定
値を演算処理することを特徴とする高炉出銑口の孔深さ
測定方法である。上記設定値を予じめ定めていない場合
には、本発明は、マッド材で封鎖した高炉出銑口を、フ
ィード用チェーンを介して、エアモータで前進、後退す
るガイドセルに吊下げた削孔機に、ドリル又は金棒を取
付け、その回転又は打撃によって開孔するにあたり、上
記フィード用チェーンに連接したスプロケットの数秒毎
の回転数を測定し、その測定値から前記ドリル又は金棒
の数秒毎の前進速度を演算し、該前進速度の変化からド
リル又は金棒がマッド材を貫通した時期を検知すること
を特徴とする高炉出銑口の孔深さ測定方法となる。That is, according to the present invention, a blast furnace taphole closed with a mud material is attached to a drilling machine in which a blast furnace taphole is suspended in a guide cell which is advanced and retracted by an air motor through a feed chain, and a drill or a gold rod is attached to the drilling machine. At the time of opening by the rotation or impact, the number of revolutions of the sprocket connected to the feed chain is measured every few seconds, and the measured value is compared with a preset set value, and the tip of the drill or the gold rod is mud. A method for measuring the depth of a hole in a taphole of a blast furnace, which comprises detecting that the material has penetrated and calculating the detection time and the measured value. When the above set value is not determined in advance, the present invention provides a blast furnace taphole closed with a mud material, a drilling hole that is hung from a guide cell that is advanced and retracted by an air motor through a feed chain. When a drill or a gold rod is attached to the machine and a hole is opened by its rotation or impact, the number of revolutions of the sprocket connected to the feed chain is measured every few seconds, and the drill or the gold rod is moved forward every few seconds from the measured value. A hole depth measuring method for a blast furnace taphole is characterized in that the speed is calculated and the time when the drill or the gold rod penetrates the mud material is detected from the change in the forward speed.
【０００９】[0009]
【作用】本発明によれば、金棒又はドリルの先端が高炉
出銑口を封鎖しているマッド材を貫通したことを、削孔
機フィード用チェーンに連接したスプロケットの数秒毎
の回転数の変化を測定して検知するようにしたから、従
来の削孔機操作者の感覚による掘削速度の検知よりも精
度がアップする。また、本発明によれば、金棒又はドリ
ルの掘削距離を開孔機スプロケットの数秒毎の回転数を
測定して算出するようにしたから、従来の削孔機操作者
による目測よりも精度が著しくアップする。According to the present invention, the fact that the tip of the gold rod or the drill penetrates the mud material blocking the taphole of the blast furnace means that the number of revolutions of the sprocket connected to the drilling machine feed chain changes every few seconds. Is measured and detected, the accuracy is higher than that of the conventional detection of the excavation speed by the feeling of the drilling machine operator. Further, according to the present invention, since the excavation distance of the gold rod or the drill is calculated by measuring the number of revolutions of the perforator sprocket every few seconds, the accuracy is significantly higher than the conventional visual measurement by the perforator operator. Up.
【００１０】[0010]
【実施例】以下、本発明の内容を図１〜２に基づき実施
例で説明する。図１は、本発明の実施に必要な装置の概
要である。その大部分は、図３で既に説明済みであるの
で省略し、追加された部分の捕足をする。削孔具（ドリ
ル又は金棒）２の前進速度は、ガイドセル５のそれと同
じであり、ガイドセル５の前進はエアモータ６によって
ガイドセルフィード用チェーン（以下、チェーンとい
う）８を介して行われる。したがって、このチェーン８
にスプロケット９を連接しておけば、上記の前進速度に
対応してスプロケット９が回転する。本発明は、この回
転数を測定し、その測定値を利用することに特徴があ
る。そのため、スプロケット９には回転検出器１０が接
続し、測定した回転数を回転速度、削孔具の前進速度、
前進距離に変換する演算装置１１及び演算結果をアナロ
グ又はデジタルで示す表示装置１２が配設している。The contents of the present invention will be described below with reference to FIGS. FIG. 1 is an overview of the equipment required to carry out the present invention. Most of them have been already described in FIG. 3 and are omitted, and the added portion is captured. The advancing speed of the drilling tool (drill or gold rod) 2 is the same as that of the guide cell 5, and the advancing of the guide cell 5 is performed by an air motor 6 via a guide cell feed chain (hereinafter referred to as a chain) 8. Therefore, this chain 8
If the sprocket 9 is connected to the sprocket 9, the sprocket 9 will rotate corresponding to the above-mentioned forward speed. The present invention is characterized in that this rotation speed is measured and the measured value is used. Therefore, the rotation detector 10 is connected to the sprocket 9, and the measured rotation speed is the rotation speed, the forward speed of the drilling tool,
Arranged are an arithmetic unit 11 for converting into a forward distance and a display unit 12 for indicating the arithmetic result in analog or digital form.
【００１１】実際の測定結果を図２（ａ）〜２（ｃ）に
示す。図２（ａ）は、開孔作業がドリルの使用のみで行
われた場合であり、縦軸はスプロケットの回転数から削
孔具（ドリル）の前進速度に換算した値、横軸は前記ド
リル前進速度に時間を乗じて求めたドリル深度、すなわ
ち出銑口孔深さである。図２（ａ）に表示のグラフより
明らかなように、ドリル前進速度はある時期で急速に増
大する。つまり、その速度変更点で、削孔具がマッド材
を貫通したのである。したがって、削孔開始時からその
時点までの時間とその間の進行速度がわかるので、出銑
口の孔深さ（開孔長さ）は容易にしることができる。こ
のマッド材を削孔具が貫通する際の、スプロケットの回
転速度あるいは削孔具の前進速度の設定値をあらかじめ
定めるには、オペレータの今までの経験値を利用するこ
とも考えられるが、精度を重視する本発明の主旨から多
くの実測データを整理して定めた。但し、出銑口孔深さ
の把握が迅速を要しない場合又は設定値が定まっていな
い場合は、表示装置１２の図２（ａ）のグラフから読み
取るのが最も正確である。Actual measurement results are shown in FIGS. 2 (a) to 2 (c). FIG. 2A shows the case where the drilling operation is performed only by using the drill, the vertical axis is the value converted from the rotation speed of the sprocket to the forward speed of the drilling tool (drill), and the horizontal axis is the drill. It is the drill depth obtained by multiplying the forward speed by time, that is, the tap hole depth. As is clear from the graph shown in FIG. 2A, the drill advancing speed rapidly increases at a certain time. In other words, at the speed change point, the drilling tool penetrated the mud material. Therefore, the time from the start of drilling to the time and the speed of progress during that time can be known, so that the hole depth (hole length) of the tap hole can be made easy. In order to predetermine the set value of the rotation speed of the sprocket or the forward speed of the drilling tool when the drilling tool penetrates this mud material, it is conceivable to use the experience value of the operator so far. A large amount of actual measurement data was arranged and determined from the purpose of the present invention, which emphasizes However, when it is not necessary to promptly grasp the depth of the tap hole or when the set value is not determined, it is most accurate to read from the graph of the display device 12 shown in FIG.
【００１２】図２（ｂ）は、開孔作業がドリルと金棒を
併用した場合の例である。なお、開孔作業はその難易度
によってこのように併用する場合があり、本発明とは無
関係であるが、非常に難しい場合には酸素ガスバ−ナに
溶解も利用される。さて、この併用例は、ドリル削孔を
作業の終盤に金棒の打撃に替えているので、ドリルの前
進速度とは異なり、不連続な前進速度を示す。従って、
金棒の先端がマッド材を抜けた時期の判断は難しく、次
のように定める。すなわち、図２において、金棒先端の
位置がすでに削孔した位置以上にあり、且つ金棒がまだ
前進状態にあって、その前進速度が短時間の間に連続数
回にわたってある速度以上になった時を、金棒先端がマ
ッド材を貫通した時期と判断し、原点からの距離を算出
する。勿論、金棒の前進速度もフィード用チェーンを介
してスプロケットの回転数より求めていることに変わり
はない。FIG. 2 (b) shows an example in which the drilling work uses both a drill and a gold rod. Depending on the degree of difficulty, the hole-opening work may be used together as described above, and although it is irrelevant to the present invention, when it is extremely difficult, melting is also used in the oxygen gas burner. Now, in this combined use example, since the drilling hole is replaced with the hitting of the gold rod at the final stage of the work, it shows a discontinuous advancing speed unlike the advancing speed of the drill. Therefore,
It is difficult to judge when the tip of the gold rod has passed through the mud material, and it is determined as follows. That is, in FIG. 2, when the position of the tip of the gold rod is above the already drilled position, and the gold rod is still in the advanced state, and the advance speed becomes equal to or higher than a certain speed several times in a short time. Is determined as the time when the tip of the gold rod penetrates the mud material, and the distance from the origin is calculated. Of course, the advancing speed of the gold rod is still obtained from the rotation speed of the sprocket via the feed chain.
【００１３】図２（ｃ）は、前回の出銑口封鎖時に充填
したマッド材が未だ焼成されていない状態で次回の開孔
作業をドリルのみで行った場合の例である。マッド材は
未焼成なので、柔らかくドリルの前進速度が作業の進行
につれ遅くなる現象はなく、常に増加傾向である。しか
し、この場合でもドリル先端がマッド材を貫通した場合
には、その前進速度は急激に増加する時期あるので、孔
深さの測定が可能であった。FIG. 2 (c) shows an example in which the next drilling operation is performed only with a drill in a state where the mud material filled at the time of closing the taphole the previous time has not been fired yet. Since the mud material is unfired, the mud material is soft and there is no phenomenon that the forward speed of the drill slows down as the work progresses, and it is always increasing. However, even in this case, when the drill tip penetrates the mud material, the advancing speed thereof may increase rapidly, so that the hole depth can be measured.
【００１４】[0014]
【発明の効果】以上に述べたように、本発明では、開孔
開始からの時間とフィード用チェーンに連接したスプロ
ケットの数秒毎の回転数を測定することにより、出銑口
の孔深さを精度良く測定できるようになった。しかも、
従来の開孔機を、油圧アクチュエータによる駆動に変更
せず、元のまま使用するので、非常に安価に実施できる
利点がある。この出銑口孔深さの精度アップが可能にな
ったことは、出銑口封鎖に用いるマッド押し量の適正
化、出銑口孔深さの安定化、滓バランス悪化時のトラブ
ル減少、出銑回数の低減（出銑時間の延長）等高炉の安
定操業に対して大きい効果が期待できる。As described above, according to the present invention, the hole depth of the taphole can be determined by measuring the time from the start of opening and the number of revolutions of the sprocket connected to the feed chain every few seconds. It became possible to measure with high accuracy. Moreover,
Since the conventional drilling machine is used as it is without being changed to the drive by the hydraulic actuator, there is an advantage that it can be implemented at a very low cost. It has become possible to improve the accuracy of the taphole depth by optimizing the amount of mud used to close the taphole, stabilizing the taphole depth, reducing troubles when the balance of slag is deteriorated, A large effect can be expected for stable operation of the blast furnace, such as reduction in the number of pigs (extension of tapping time).
【図１】本発明の実施に利用する開孔機の側面図であ
り、各種計測装置も設けてある。FIG. 1 is a side view of a hole punching machine used for carrying out the present invention, in which various measuring devices are also provided.
【図２】本発明の実施結果の例であり、（ａ）はドリル
のみによる削孔、（ｂ）はドリルと金棒の併用、（ｃ）
はマッド未焼成時の場合である。2A and 2B are examples of results of implementation of the present invention, in which FIG. 2A is a hole drilled only by a drill, FIG. 2B is a combined use of a drill and a gold rod, and FIG.
Is the case when the mud is not fired.
【図３】従来の開口機の側面図である。FIG. 3 is a side view of a conventional opening machine.
１ 炉壁 ２ 削孔具（ドリル又は金棒） ３ 削孔機 ４ 出銑口 ５ ガイドセル ６ ガイドセルのフィード用エアモータ ７ チェーンホイール ８ チェーン ９ スプロケット １０ 回転検出器 １１ 演算装置 １２ 演算結果の表示装置 1 furnace wall 2 Drilling tool (drill or gold bar) 3 drilling machine 4 Outlet 5 guide cells 6 Guide cell feed air motor 7 chain wheel 8 chains 9 sprockets 10 rotation detector 11 arithmetic unit 12 Calculation result display device
───────────────────────────────────────────────────── フロントページの続き (72)発明者 細見 和夫 倉敷市水島川崎通１丁目（番地なし） 川崎製鉄株式会社 水島製鉄所内 (56)参考文献 特開 平５−263113（ＪＰ，Ａ) 特開 昭63−62807（ＪＰ，Ａ) 特開 平４−371507（ＪＰ，Ａ) 実開 平５−62558（ＪＰ，Ｕ) 実開 昭55−135034（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) C21B 7/12 302 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kazuo Hosomi 1-chome, Mizushima Kawasaki-dori, Kurashiki City (no address) Kawasaki Steel Co., Ltd. Mizushima Steel Works (56) Reference JP-A-5-263113 (JP, A) 63-62807 (JP, A) JP-A-4-371507 (JP, A) Actual development 5-5-2558 (JP, U) Actual exploitation 55-135034 (JP, U) (58) Fields investigated (Int .Cl. 7 , DB name) C21B 7/12 302
Claims (2)
ード用チェーンを介して、エアモータで前進、後退する
ガイドセルに吊下げた削孔機に、ドリル又は金棒を取付
け、その回転又は打撃によって開孔するにあたり、 上記フィード用チェーンに連接したスプロッケトの数秒
毎の回転数を測定し、その測定値を予じめ定めた設定値
と比較してドリル又は金棒の先端がマッド材を貫通した
ことを検知し、その検知時期と前記測定値を演算処理す
ることを特徴とする高炉出銑口の孔深さ測定方法。1. A drill or a gold rod is attached to a hole drilling machine in which a blast furnace tap hole closed with a mud material is hung on a guide cell that is advanced and retracted by an air motor through a feed chain, and a rotation or impact thereof is performed. Upon opening the hole, the number of revolutions of the sprocket connected to the feed chain was measured every few seconds, and the measured value was compared with the preset setting value, and the tip of the drill or the gold rod penetrated the mud material. Is detected, and the detection timing and the measured value are arithmetically processed. A method for measuring the hole depth of a blast furnace taphole.
ード用チェーンを介して、エアモータで前進、後退する
ガイドセルに吊下げた削孔機に、ドリル又は金棒を取付
け、その回転又は打撃によって開孔するにあたり、 上記フィード用チェーンに連接したスプロケットの数秒
毎の回転数を測定し、その測定値から前記ドリル又は金
棒の数秒毎の前進速度を演算し、該前進速度の変化から
ドリル又は金棒がマッド材を貫通した時期を検知するこ
とを特徴とする高炉出銑口の孔深さ測定方法。2. A drill or a gold rod is attached to a hole drilling machine in which a blast furnace tap hole closed with a mud material is hung on a guide cell which is advanced and retracted by an air motor through a feed chain, and its rotation or impact is performed. Upon opening the hole, the number of revolutions of the sprocket connected to the feed chain is measured every few seconds, the forward speed of the drill or the gold rod is calculated every few seconds from the measured value, and the drill or the change is calculated from the change in the forward speed. A method for measuring the hole depth of a blast furnace tap hole, characterized by detecting the time when a gold rod penetrates the mud material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27069193A JP3520535B2 (en) | 1993-10-28 | 1993-10-28 | Blast furnace tap hole depth measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27069193A JP3520535B2 (en) | 1993-10-28 | 1993-10-28 | Blast furnace tap hole depth measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07126722A JPH07126722A (en) | 1995-05-16 |
| JP3520535B2 true JP3520535B2 (en) | 2004-04-19 |
Family
ID=17489616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27069193A Expired - Fee Related JP3520535B2 (en) | 1993-10-28 | 1993-10-28 | Blast furnace tap hole depth measurement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3520535B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100782685B1 (en) * | 2001-08-09 | 2007-12-07 | 주식회사 포스코 | A device for confirming the depth of melting iron outlet using the rotation of mud gun |
| US7051824B1 (en) | 2003-11-03 | 2006-05-30 | Accessible Technologies, Inc. | Supercharged motorcycle |
| KR100812167B1 (en) * | 2006-12-21 | 2008-03-12 | 주식회사 포스코 | Thickness measuring device of refractory |
| CN109439824A (en) * | 2018-12-18 | 2019-03-08 | 山东钢铁股份有限公司 | A kind of method and iron notch drill measuring blast furnace taphole depth |
-
1993
- 1993-10-28 JP JP27069193A patent/JP3520535B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07126722A (en) | 1995-05-16 |
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