JP2770369B2 - Tap hole forming method - Google Patents
Tap hole forming methodInfo
- Publication number
- JP2770369B2 JP2770369B2 JP1023513A JP2351389A JP2770369B2 JP 2770369 B2 JP2770369 B2 JP 2770369B2 JP 1023513 A JP1023513 A JP 1023513A JP 2351389 A JP2351389 A JP 2351389A JP 2770369 B2 JP2770369 B2 JP 2770369B2
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- tap hole
- hole
- tapping
- small
- 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 - Lifetime
Links
Landscapes
- Blast Furnaces (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、出銑過程における出銑孔の孔径の拡大を
減少させる出銑孔形成方法に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tap hole forming method for reducing an increase in the diameter of a tap hole in a tapping process.
［従来技術］ 一般に、高炉の出銑孔は手前部を大径の金棒（例えば
60φmm）で穿孔し、奥部を小径の金棒（例えば38φmm）
で穿孔して形成する。このようにして形成した出銑孔
は、出銑過程において、出銑滓により侵食、損耗される
ために、孔径が拡大する。このため、出銑滓速度が造銑
滓速度を上回り、やがて、炉内のガスのみの吹き出しと
なること、およびマッドガン（閉塞機）で閉塞可能な口
径限度があることから、３〜４時間後に出銑孔の閉塞を
行っている。[Prior art] Generally, a tap hole of a blast furnace has a large diameter metal rod (for example,
60mm), and a small diameter metal rod at the back (for example, 38mm)
And formed by drilling. The tap hole formed in this way is eroded and worn by tapping slag in the tapping process, so the hole diameter increases. For this reason, the tapping slag speed exceeds the slag making speed, and eventually only the gas in the furnace is blown out, and there is a caliber limit that can be closed with a mud gun (clogging machine). The tap hole is closed.
［発明が解決しようとする課題］ 従来の出銑孔では、出銑回数を多くしなければなら
ず、それに伴い出銑孔の開孔および閉塞作業が多くな
る。開孔および閉塞作業には多量の資材および労力を要
し、また出銑回数が多いと、出銑樋にかかる熱変動が多
くなり、出銑樋の耐火物にスポーリングを発生させるい
う問題点がある。従って、出銑回数はできるだけ少ない
ほうが望ましい。[Problems to be Solved by the Invention] In a conventional tap hole, the number of taps must be increased, and accordingly, opening and closing operations of the tap hole increase. Opening and closing work requires a large amount of material and labor, and if tapping is performed frequently, the heat fluctuation on the tapping gutter increases, causing spalling in the refractory of the tapping gutter. There is. Therefore, it is desirable that the tapping frequency be as small as possible.
本発明は、出銑回数の増加の原因となっている出銑過
程における出銑孔の孔径拡大を減少させる出銑孔の形成
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 method for forming a tap hole that reduces the expansion of the tap hole diameter in the tapping process that causes an increase in the number of taps.
［課題を解決するための手段および作用］ この発明は、上記の目的を出銑孔の手前部に大径の金
棒で大径の孔を穿孔し、次に小径の金棒に取り替えて、
該小径の金棒に複数の耐火物円筒を挿入し、前記大径の
孔に前記複数の耐火物製円筒を装着した後、残りの出銑
孔を穿孔する出銑孔形成方法によって達成する。[Means and Actions for Solving the Problems] The present invention provides the above object by drilling a large-diameter hole with a large-diameter metal rod in front of a tap hole, and then replacing it with a small-diameter metal rod.
This is achieved by a tap hole forming method in which a plurality of refractory cylinders are inserted into the small diameter metal rod, the plurality of refractory cylinders are mounted in the large diameter holes, and the remaining tap holes are drilled.
出銑孔の大径部に装着した耐火物製円筒により、出銑
過程における孔径の拡大は、従来よりも極めて少なくな
る。従って、出銑滓速度を造銑滓速度に近ずけるように
耐火物製円筒の内径を選択すれば、出銑時間を延長する
ことができるから、従来より出銑回数を減少することが
できる。Due to the refractory cylinder attached to the large diameter portion of the tap hole, the expansion of the hole diameter in the tapping process is extremely smaller than in the past. Therefore, if the inner diameter of the refractory cylinder is selected so that the tapping speed is close to the tapping speed, the tapping time can be extended, and the tapping frequency can be reduced compared to the conventional method. .
［実施例］ 本発明の実施例を以下に説明する。本発明の方法は、
まず、第１図（Ａ）に示すように図示しない開孔機に大
径（例えば、60φmm）の金棒２をセットし、炉壁１の出
銑孔部に大径の孔３を穿孔する。大径孔３の穿孔長さは
出銑孔長さの約2/3、出銑孔長さが3mの場合は2mとな
る。次に、第１図（Ｂ）に示すように開孔機の大径金棒
を小径金棒６（例えば38φmm）に取替えて、大径孔長さ
相当の耐火物製円筒５を小径金棒６に挿入し、耐火物製
円筒５の先端および後端を、その内径と小径金棒の隙間
に係止片（開孔の時、小径金棒の前進に支障のない木製
またはプラスチック製のもの）を打込み、小径金棒に係
止する。大径孔長さ相当の耐火物製円筒５を装着した小
径金棒６を大径孔３に挿入し、耐火物製円筒５を大径孔
３内部に装着する。次に、小径金棒６を前進させ小径孔
４を穿孔し、出銑を開始する。なお、小径金棒６で穿孔
を開始すると、係止片は抜け落ちまたは摩滅するので、
耐火物製円筒５と小径金棒６の係止が解かれる。第１図
（Ｃ）は本発明の方法により形成した出銑孔の縦断面図
を示したものである。そして、出銑孔よりガスが吹き出
したら、マッドガンで閉塞を行う。次の開孔は小径金棒
で行い、小径金棒による開孔を耐火物製円筒が損耗して
一定内径以上に拡大する迄続行する。耐火物製円筒が一
定内径以上になったら、本発明の方法で出銑孔を作り直
す。[Example] An example of the present invention will be described below. The method of the present invention comprises:
First, as shown in FIG. 1 (A), a large-diameter (for example, 60 mm) metal rod 2 is set in a drilling machine (not shown), and a large-diameter hole 3 is drilled in a tap hole of the furnace wall 1. The drilling length of the large diameter hole 3 is about 2/3 of the taphole length, and 2 m when the taphole length is 3 m. Next, as shown in FIG. 1B, the large-diameter metal rod of the drilling machine is replaced with a small-diameter metal rod 6 (for example, 38 mm), and a refractory cylinder 5 corresponding to the large-diameter hole length is inserted into the small-diameter metal rod 6. Then, a locking piece (made of wood or plastic which does not hinder the advance of the small-diameter metal rod at the time of opening) is inserted into the gap between the inner diameter and the small-diameter metal rod of the refractory cylinder 5 at the front and rear ends thereof. Lock to the bar. A small-diameter metal rod 6 equipped with a refractory cylinder 5 corresponding to the length of the large-diameter hole is inserted into the large-diameter hole 3, and the refractory cylinder 5 is mounted inside the large-diameter hole 3. Next, the small-diameter metal rod 6 is advanced to pierce the small-diameter hole 4 and start tapping. When the drilling is started with the small-diameter metal rod 6, the locking piece comes off or wears out.
The lock between the refractory cylinder 5 and the small diameter metal rod 6 is released. FIG. 1 (C) is a longitudinal sectional view of a tap hole formed by the method of the present invention. Then, when gas is blown out from the tap hole, the gas is blocked with a mud gun. The next opening is performed with a small-diameter metal rod, and the opening with the small-diameter metal rod is continued until the refractory cylinder is worn and expanded to a certain inner diameter or more. When the refractory cylinder has a certain inner diameter or more, a tap hole is re-created by the method of the present invention.
第２図（Ａ）および（Ｂ）は本発明に使用する耐火物
製円筒の正面図および側面図で、上記径の金棒を使用す
る場合は、例えば、内径Di;42mm,外径Do;60mm,長さL;20
0mm等が使用される。長さは作業にあった扱い易い寸法
にするとよい。また、耐火物は窒化珪素系、アルミナ系
耐火物が使用される。耐火物製円筒の内径は、出銑滓速
度が造銃滓速度に近ずくように内径を選択するとよい。
このようにすれば、出銑時間のより長い延長が計れる。
本発明の実施により出銑時間を12時間以上にすることが
出来る。2 (A) and 2 (B) are a front view and a side view of a refractory cylinder used in the present invention. When a metal rod having the above diameter is used, for example, the inner diameter D i is 42 mm, and the outer diameter D o. ; 60mm, length L; 20
0 mm or the like is used. The length should be a size that is easy to handle according to the task. As the refractory, a silicon nitride-based or alumina-based refractory is used. The inner diameter of the refractory cylinder is preferably selected so that the tapping slag speed approaches the gun slag speed.
In this way, a longer tapping time can be extended.
According to the present invention, the tapping time can be set to 12 hours or more.
［発明の効果］ 本発明の方法は出銑孔の大径部に損耗の少ない耐火物
製円筒を装着して出銑孔を形成するので、出銑孔の孔径
の拡大が少なくなり、造銑滓速度に近ずくように耐火物
製円筒の内径を選択することにより長時間出銑が可能と
なる。従って、出銑回数を減少することが出来る。この
ことにより、開孔、開閉作業に伴う労力および資材を節
減することができ、且つ出銑樋の補修費の節減等が計れ
る。[Effects of the Invention] In the method of the present invention, a tap hole is formed by mounting a refractory cylinder with little wear on the large diameter portion of the tap hole, so that the hole diameter of the tap hole is reduced, and By selecting the inner diameter of the refractory cylinder so as to approach the slag speed, tapping can be performed for a long time. Therefore, the number of tapping times can be reduced. As a result, labor and materials involved in the opening and opening operations can be reduced, and the cost of repairing the tapping gutter can be reduced.
第１図は本発明の方法の説明図で、（Ａ）は大径部の穿
孔の様子を示す図、（Ｂ）は大径部に耐火物製円筒を装
着し、小径部を穿孔した様子を示す図、（Ｃ）は本発明
の方法で形成した出銑孔の縦断面図、第２図は本発明に
使用する耐火物製リングで（Ａ）は正面図および（Ｂ）
は側面図である。 １……出銑孔部炉壁、２……大径金棒、３……大径孔、
４……小径孔、５……耐火物製円筒、６……小径金棒。FIG. 1 is an explanatory view of the method of the present invention, in which (A) shows a state of drilling a large diameter part, and (B) shows a state in which a refractory cylinder is attached to a large diameter part and a small diameter part is drilled. FIG. 2 (C) is a longitudinal sectional view of a taphole formed by the method of the present invention, FIG. 2 is a refractory ring used in the present invention, (A) is a front view and (B).
Is a side view. 1 ... taphole furnace wall, 2 ... large-diameter metal rod, 3 ... large-diameter hole,
4 ... Small diameter hole, 5 ... Refractory cylinder, 6 ... Small diameter metal rod.
Claims (1)
穿孔し、次に小径の金棒に取り替えて、該小径の金棒に
複数の耐火物製円筒を挿入し、前記大径の孔に前記複数
の耐火物製円筒を装着した後、残りの出銑孔を穿孔する
ことを特徴とする出銑孔形成方法。1. A large-diameter hole is drilled in front of a tap hole with a large-diameter rod, and then replaced with a small-diameter rod, and a plurality of refractory cylinders are inserted into the small-diameter rod. A method for forming a tap hole, comprising: attaching the plurality of refractory cylinders to a large-diameter hole; and then drilling the remaining tap holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1023513A JP2770369B2 (en) | 1989-02-01 | 1989-02-01 | Tap hole forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1023513A JP2770369B2 (en) | 1989-02-01 | 1989-02-01 | Tap hole forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02205610A JPH02205610A (en) | 1990-08-15 |
| JP2770369B2 true JP2770369B2 (en) | 1998-07-02 |
Family
ID=12112531
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1023513A Expired - Lifetime JP2770369B2 (en) | 1989-02-01 | 1989-02-01 | Tap hole forming method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2770369B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008036790B4 (en) * | 2008-08-07 | 2014-05-15 | Tmt Tapping-Measuring-Technology Gmbh | Tapping channel for the discharge of iron and metal melts and liquid slag from metallurgical containers, such as blast furnaces and furnaces |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5041209Y2 (en) * | 1971-11-29 | 1975-11-22 |
-
1989
- 1989-02-01 JP JP1023513A patent/JP2770369B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02205610A (en) | 1990-08-15 |
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