JPH0885809A - Method for removing remaining iron in blast furnace trough - Google Patents
Method for removing remaining iron in blast furnace troughInfo
- Publication number
- JPH0885809A JPH0885809A JP22230094A JP22230094A JPH0885809A JP H0885809 A JPH0885809 A JP H0885809A JP 22230094 A JP22230094 A JP 22230094A JP 22230094 A JP22230094 A JP 22230094A JP H0885809 A JPH0885809 A JP H0885809A
- Authority
- JP
- Japan
- Prior art keywords
- gutter
- slag
- molten
- iron
- 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.)
- Withdrawn
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Blast Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高炉の出銑滓作業にお
ける残銑抜き樋の片付け作業の負荷を軽減する残銑抜き
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 removing residual iron in a blast furnace for tapping and slagging, which reduces the load of tidying work of the residual iron removing gutter.
【０００２】[0002]
【従来の技術】高炉大樋は、高炉より抽出された銑滓を
分離するため、仕切板を設けてあり、出銑終了後も大樋
中に銑滓を溜めておく貯湯方式となっている。大樋は、
点検、修理のため定期的（数日に１回）に、数十トンの
貯銑滓（以降、残銑という）を抜き取る必要がある。こ
の残銑抜き作業は、大樋の最後端部側壁に設けられた残
銑抜き孔をドリルで開口し、流出する残銑滓を残銑抜き
樋を経由して鍋に受銑することにより行われる。残銑抜
きが完了した後、残銑抜き孔に耐火物を充填して残銑抜
き孔の閉塞が行われる。2. Description of the Related Art A blast furnace gutter is provided with a partition plate for separating the pig iron extracted from the blast furnace, and has a hot water storage system in which the pig iron is stored in the gutter even after tapping is completed. Ohi,
For inspection and repair, it is necessary to extract dozens of tons of pig iron slag (hereinafter referred to as residual iron) periodically (once every few days). This residual iron removal work is performed by opening a residual iron removal hole provided on the side wall at the end of the large gutter with a drill, and receiving the remaining residual iron slag into a pan via the residual iron removal gutter. . After the residual iron removal is completed, the residual iron removal hole is filled with a refractory material to close the residual iron removal hole.
【０００３】残銑を抜いたとき、初期から中期にかけて
大樋下部に溜まっている溶銑が流出し、末期に大樋上部
に溜まっている溶滓が流出する。この際、溶滓は熱容量
が小さいため、その一部は残銑抜き樋を流れる間に凝固
し、一部溶銑を巻き込んだ粕として樋上に残る。樋上に
残る粕は、次回の残銑抜きに支障をきたさないように片
付けられる。When the residual iron is pulled out, the molten iron accumulated in the lower part of the gutter flows out from the initial stage to the middle period, and the molten slag accumulated in the upper part of the gutter flows out at the end stage. At this time, since the molten metal has a small heat capacity, a part of the molten metal solidifies while flowing through the residual hot metal drainage gutter, and a part of the molten iron remains on the gutter as a lees containing the molten iron. The lees left on the gutter are cleaned up so as not to interfere with the next removal of residual iron.
【０００４】上記の作業の中、残銑抜き孔の開口、閉塞
作業は、機械化のための種々の提案（例えば、実開平０
１−９４４４６号）がなされており、また、実用化され
ている。しかし、残銑抜き樋上に残る粕の片付け作業
は、人手による作業として残っている。Among the above-mentioned works, the opening and closing work of the residual iron vent hole are various proposals for mechanization (for example, the actual open flat plate).
1-94446) has been made and has been put to practical use. However, the work of clearing the dregs left on the residual iron drainage gutter remains as manual work.
【０００５】[0005]
【発明が解決しようとする課題】従来方法の場合、残銑
抜き樋上に残る粕は、脆い滓の中に固い銑鉄が一部混じ
った塊で、その量も多い。片付け作業は、ブレーカーで
粕を破砕し、滓と銑鉄塊とに分け、小さく砕かれた滓
は、スコップで掬いシュートを介して地上に落とし、ま
た、銑鉄塊は、チェーン等で玉掛けしてクレーンで地上
に降ろすことにより行っていた。樋に付着する粕の量が
多いため、片付け作業は残銑抜き毎に毎回行う必要があ
り、また一回当たりの片付け作業工数も多くかかってい
た。In the case of the conventional method, the residue left on the residual iron drainage gutter is a mass in which hard pig iron is partially mixed in the brittle slag, and the amount thereof is large. For tidying up, breakers are crushed with a breaker and divided into slag and pig iron lumps, small crushed slags are dropped onto the ground through a scooping scoop with a scoop, and pig iron lumps are slid with a chain etc. It was done by dropping it on the ground. Since the amount of lees attached to the gutter is large, it is necessary to carry out the tidying work every time after removing the residual iron, and it also takes a lot of man-hours for tidying work.
【０００６】本発明は、残銑抜き樋に残る粕の量を減少
させ、片付け作業工数を大幅に減少させることのできる
残銑抜き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 removing residual iron capable of reducing the amount of dregs remaining in the residual iron removing gutter and significantly reducing the number of man-hours for clearing work.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記の目的
を、以下の方法で達成する。請求項１にかかる発明は、
大樋に滞留した溶銑と溶滓の境界部の近傍で境界部部よ
り下の大樋側壁に抜き孔を開口して溶滓を抜き、溶滓抜
きが完了した後、大樋側壁の下部に抜き孔を開口して溶
銑を抜くことを特徴とする高炉樋の残銑抜き方法であ
る。The present invention achieves the above object by the following method. The invention according to claim 1 is
Near the boundary between the hot metal and the slag stayed in the gutter, a vent hole is opened in the side wall of the gutter below the boundary part to drain the slag, and after the slag removal is completed, a hole is placed at the bottom of the side wall of the gutter. This is a method for removing residual hot metal from a blast furnace gutter, which is characterized by opening and removing hot metal.
【０００８】また、請求項２にかかる発明は、大樋に滞
留する溶銑と溶滓の境界部より高さがやや低い升壁を大
樋の側壁の内部に大樋の側壁の一部を囲むように設け、
前記升壁で囲まれた大樋側壁の下部に抜き孔を開口して
溶滓を抜き、溶滓抜きが完了した後、升壁の下部に抜き
孔を開口して溶銑を抜くことを特徴とする高炉樋の残銑
抜き方法である。According to the second aspect of the present invention, a cell wall having a height slightly lower than the boundary portion between the hot metal and the slag staying in the gutter is provided inside the side wall of the gutter so as to surround a part of the side wall of the gutter. ,
It is characterized in that a vent hole is opened in the lower part of the gutter side wall surrounded by the cell wall to remove the slag, and after the slag removal is completed, a vent hole is opened in the lower part of the cell wall to remove the hot metal. This is a method for removing residual iron from blast furnace gutters.
【０００９】[0009]
【作用】請求項１の発明においては、最初に開口された
抜き孔から少量の溶銑が流出した後溶滓が流出する。請
求項２の発明においては、最初に開口された抜き孔から
溶滓と少量の溶銑とが流出する。いずれの場合も、残銑
抜き樋に溶滓の凝固した粕が付着する。その後、請求項
１の発明においては大樋側壁の下部に開口された抜き孔
から、請求項２に発明においては升壁の下部に開口され
た抜き孔から、それぞれ溶銑が流出する。溶銑は、熱容
量が大きいから樋に付着した溶滓粕を溶かして流し落と
す。このため、樋に付着する銑滓粕は、著しく減少し、
粕の片付け作業は、残銑抜き毎に行う必要はなくなり、
残銑抜き７回に１回程度行えばよい。また、粕は銑鉄が
主体となるから、粕の片付けは、粕にチェーン等で玉掛
けしてクレーンで地上に吊り降ろすだけでよい。In the first aspect of the invention, a small amount of hot metal flows out from the first opening hole, and then the molten slag flows out. According to the second aspect of the invention, the molten slag and a small amount of hot metal flow out from the first opening hole. In any case, the solidified residue of molten slag adheres to the residual iron drainage gutter. After that, in the invention of claim 1, the hot metal flows out through a hole opened in the lower part of the gutter side wall, and in the invention of claim 2 through the hole opened in the lower part of the box wall. Since the hot metal has a large heat capacity, it melts away the dross cake adhering to the gutter and casts it down. For this reason, the amount of pig iron residue adhering to the gutter is significantly reduced,
It is no longer necessary to clean up the meal every time the residual iron is removed.
It may be performed about once every seven times of residual iron removal. Also, since pig iron is mainly used as the meal, it is sufficient to clean up the meal by hanging it on the meal with a chain and hanging it on the ground with a crane.
【００１０】[0010]
【実施例】本発明の実施例を図面に基づいて以下に説明
する。図８は、大樋等の平面図、図９は図８のＡ−Ａ断
面図である。出銑時、出銑孔１から流出する溶銑および
溶滓は、大樋２の中を流れ、大樋の後方に設けられた仕
切板３で溶滓と溶銑に分離される。上層の溶滓は仕切板
３の上流に接続されたスラグ樋４からドライピット等に
排出され、下層の溶銑は仕切板３の下を潜り、仕切板の
後方の湯溜り５を上昇して溶銑樋６を流れて溶銑鍋に注
入される。出銑が終了すると、図９に示すように仕切板
３の上流に溶滓７および溶銑８が、湯溜り５に溶銑８が
溜まった状態になる。出銑が繰り返されるたびに、大樋
２に溜まった溶銑および溶滓は入れ替わるが、出銑して
ないときは、図９に示す状態が維持される。そして、数
日に１回、大樋２の点検、修理のため溜まっている溶
銑、溶滓の抜取り、即ち残銑抜きが行われる。この残銑
抜きは、湯溜り５の大樋の側壁２ａの底部に抜き孔９を
開口して残銑抜き樋１０を経由して溶銑鍋に払い出すこ
とにより行われる。Embodiments of the present invention will be described below with reference to the drawings. 8 is a plan view of Ohiga et al., And FIG. 9 is a sectional view taken along line AA of FIG. During tapping, the hot metal and slag flowing out of the tap hole 1 flow through the large gutter 2 and are separated into molten metal and hot metal by a partition plate 3 provided at the rear of the large gutter. The molten metal in the upper layer is discharged from a slag gutter 4 connected upstream of the partition plate 3 to a dry pit, etc., and the molten metal in the lower layer dives under the partition plate 3 and rises in a pool 5 behind the partition plate. It flows through the gutter 6 and is poured into the hot metal ladle. When the tapping is completed, the molten slag 7 and the molten pig iron 8 are in the upstream of the partition plate 3, and the molten pig iron 8 is in the pool 5 as shown in FIG. Each time the tapping is repeated, the hot metal and the molten slag accumulated in the gutter 2 are replaced, but when no tapping is performed, the state shown in FIG. 9 is maintained. Then, once every several days, the hot metal and the molten metal accumulated for the inspection and repair of the gutter 2 are removed, that is, the residual hot metal is removed. This residual hot metal removal is performed by opening a vent hole 9 at the bottom of the side wall 2a of the large gutter of the basin 5 and discharging it to the hot metal ladle via the residual hot metal drainage gutter 10.
【００１１】上記のような残銑抜き作業において、本発
明に係わる残銑抜き方法は、以下のように行われる。In the above residual iron removing work, the residual iron removing method according to the present invention is performed as follows.
【００１２】（実施例１）図１に示すように、大樋の側
壁２ａに、その大樋の下部で、大樋敷底部に接して第１
の抜き孔１１を設け、第１の抜き孔１１の上方、滞留す
る溶銑８と溶滓７の境界部より若干下の位置（約１００
ｍｍが好ましい）に第２の抜き孔１２を設ける。これら
の抜き孔は、残銑抜き以外のときは耐火物を充填して閉
塞されている。残銑を抜くときは、最初に、図２に示す
ように第２の抜き孔１２を開口機１３で開口して上層の
溶滓７を排出する。溶滓の排出後、残銑抜き樋１０上
に、溶滓の一部が凝固した粕１４が相当量付着する。次
に、図３に示すように第１の抜き孔１１を開口して溶銑
８を排出する。溶銑が残銑抜き樋に付着している滓粕１
４を溶かして流れ、残銑抜き樋上には粕は殆ど残らな
い。(Example 1) As shown in FIG. 1, on a side wall 2a of a gutter, a first part of the gutter is in contact with a bottom part of the gutter floor at a lower part of the gutter.
Is provided at a position slightly above the boundary between the accumulated hot metal 8 and the molten slag 7 (about 100
mm is preferable). These vent holes are filled with a refractory material and closed except when the residual iron is removed. When removing the residual iron, first, as shown in FIG. 2, the second punching hole 12 is opened by the opening machine 13 to discharge the molten slag 7 in the upper layer. After discharging the molten slag, a considerable amount of the dregs 14 in which a part of the molten slag is solidified adheres to the residual iron drainage gutter 10. Next, as shown in FIG. 3, the first vent hole 11 is opened and the hot metal 8 is discharged. Slag lees with hot metal adhering to the residual hot metal removal gutter 1
4 melted and flowed, leaving almost no lees on the residual iron drainage gutter.
【００１３】（実施例２）図４および図５に示すよう
に、湯溜り５の大樋の側壁２ａの底部に第１の抜き孔２
１を設け、この第１の抜き孔２１を囲うように升壁１５
を設ける。そして、升壁１５の高さをその上端が滞留す
る溶滓７と溶銑８の境界部の若干下になるように設定す
る。排出升１６の奥壁に第１の抜き孔２１の軸線と一致
する第２の抜き孔２２を設ける。これらの抜き孔は、残
銑抜き以外のときは耐火物を充填して閉塞されている。(Embodiment 2) As shown in FIGS. 4 and 5, a first drain hole 2 is formed at the bottom of a side wall 2a of a gutter of a basin 5.
1 is provided, and the surrounding wall 15 surrounds the first hole 21.
To provide. Then, the height of the cell wall 15 is set so as to be slightly below the boundary portion between the molten slag 7 and the hot metal 8 where the upper end of the cell wall 15 stays. A second punched hole 22 that is aligned with the axis of the first punched hole 21 is provided on the inner wall of the discharge box 16. These vent holes are filled with a refractory material and closed except when the residual iron is removed.
【００１４】残銑を抜くときは、最初に、図６に示すよ
うに、第１の抜き孔２１を開口して、上層の溶滓７を排
出升１６を通して排出する。溶滓７の排出後、排出升１
６の奥壁の第２の抜き孔２２を開口し、排出升１６およ
び第１の抜き孔２１を経由して溶銑を抜く。この場合
も、実施例１の方法と同様、溶滓を排出後、残銑抜き樋
上に相当量の粕が付着するが、その後溶銑を排出するの
で残銑抜き樋上には、粕は殆ど残らない。実施例２の方
法では、開口位置を上下方向に変えることのできない開
口機が設置されている場合に適用できる。When removing the residual iron, first, as shown in FIG. 6, the first hole 21 is opened to discharge the upper-layer molten slag 7 through the discharge chamber 16. After discharging the molten slag 7, discharge box 1
The second vent hole 22 in the inner wall of 6 is opened, and the hot metal is pulled out through the discharge chamber 16 and the first vent hole 21. Also in this case, similar to the method of Example 1, after discharging the molten slag, a considerable amount of the dregs adheres to the residual hot metal drainage gutter, but since the molten iron is discharged thereafter, almost no dregs remain on the residual hot metal drainage gutter. . The method of the second embodiment can be applied to the case where an opening machine whose opening position cannot be changed in the vertical direction is installed.
【００１５】実施例１の方法を実施した結果、 従来
法では、粕の片付けを残銑抜き毎に毎回行わねばならな
かったが、本発明方法では残銑抜き７回に１回行えばよ
いこと、 粕の片付けに要する工数は、従来法で８人
・時間を要したのに対し、本発明方法では１人・時間で
済むことが分かった。As a result of carrying out the method of Example 1, in the conventional method, it was necessary to clean up the lees every time the residual iron was removed, but in the method of the present invention, it may be carried out once every seven times of the remaining iron removal. It was found that the man-hour required for clearing the lees required one person / hour in contrast to the conventional method which required eight persons / hour.
【００１６】[0016]
【発明の効果】本発明は、最初に溶滓を排出し、その
後、熱容量の大きい溶銑を排出するから残銑抜き樋に粕
が殆ど残らず、従来法に比較して粕の片付け頻度および
片付け工数を大幅に減少させることができる。Industrial Applicability According to the present invention, since the molten metal is first discharged and then the molten metal having a large heat capacity is discharged, almost no residue remains in the residual iron removing trough, and the cleaning frequency and the cleaning rate of the residue compared with the conventional method. The man-hours can be greatly reduced.
【図１】本発明に係わる実施例１における残銑抜き孔の
形成位置を示す図である。FIG. 1 is a diagram showing a forming position of a residual iron hole in Example 1 according to the present invention.
【図２】実施例１における溶滓排出後の状態を示す図で
ある。FIG. 2 is a diagram showing a state after discharging molten slag in Example 1.
【図３】実施例１における溶銑排出後の状態を示す図で
ある。FIG. 3 is a diagram showing a state after discharging hot metal in Example 1.
【図４】実施例２における排出升および抜き孔形成位置
を示す平面図である。FIG. 4 is a plan view showing a discharge box and a hole forming position in the second embodiment.
【図５】実施例２における排出升および抜き孔形成位置
を示す断面図である。FIG. 5 is a cross-sectional view showing a discharge box and a hole forming position in the second embodiment.
【図６】実施例２における溶滓排出後の状態を示す図で
ある。FIG. 6 is a diagram showing a state after discharging molten slag in Example 2.
【図７】実施例２における溶銑排出後の状態を示す図で
ある。FIG. 7 is a diagram showing a state after discharging hot metal in Example 2.
【図８】大樋等の平面図である。FIG. 8 is a plan view of Ohiga et al.
【図９】図８のＡ−Ａ断面図である。9 is a cross-sectional view taken along the line AA of FIG.
２ 大樋 ２ａ 側壁 ３ 仕切板 ７ 溶滓 ８ 溶銑 １０ 残銑抜き樋 １１ 第１の抜き孔（実施例１） １２ 第２の抜き孔（実施例１） １３ 開口機 １４ 粕 ２１ 第１の抜き孔（実施例２） ２２ 第２の抜き孔（実施例２） 2 Large gutter 2a Side wall 3 Partition plate 7 Slag 8 Hot metal 10 Remaining hot metal drain gutter 11 First vent hole (Example 1) 12 Second vent hole (Example 1) 13 Opening machine 14 Rape 21 First vent hole (Example 2) 22 Second hole (Example 2)
Claims (2)
傍で境界部部より下の大樋側壁に抜き孔を開口して溶滓
を抜き、溶滓抜きが完了した後、大樋側壁の下部に抜き
孔を開口して溶銑を抜くことを特徴とする高炉樋の残銑
抜き方法。1. A hole is opened in the side wall of the gutter below the boundary near the boundary between the hot metal and the slag accumulated in the gutter to drain the slag, and after the slag removal is completed, the side wall of the gutter is removed. A method for removing residual hot metal from a blast furnace gutter, characterized by opening a hole at the bottom to remove hot metal.
高さがやや低い升壁を大樋の側壁の内部に大樋の側壁の
一部を囲むように設け、前記升壁で囲まれた大樋側壁の
下部に抜き孔を開口して溶滓を抜き、溶滓抜きが完了し
た後、升壁の下部に抜き孔を開口して溶銑を抜くことを
特徴とする高炉樋の残銑抜き方法。2. A box wall having a height slightly lower than a boundary portion between the hot metal and the slag staying in the gutter is provided inside the side wall of the gutter so as to surround a part of the side wall of the gutter, and is surrounded by the wall. A method for removing residual hot metal from a blast furnace gutter characterized by opening a hole in the lower part of the side wall of the large gutter to remove the molten metal, and after the completion of the molten metal removal, opening a hole in the lower part of the wall to remove the molten iron. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22230094A JPH0885809A (en) | 1994-09-19 | 1994-09-19 | Method for removing remaining iron in blast furnace trough |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22230094A JPH0885809A (en) | 1994-09-19 | 1994-09-19 | Method for removing remaining iron in blast furnace trough |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0885809A true JPH0885809A (en) | 1996-04-02 |
Family
ID=16780206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22230094A Withdrawn JPH0885809A (en) | 1994-09-19 | 1994-09-19 | Method for removing remaining iron in blast furnace trough |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0885809A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6918701B2 (en) | 2001-02-27 | 2005-07-19 | Oiles Corporation | Synthetic resin-made sliding bearing |
-
1994
- 1994-09-19 JP JP22230094A patent/JPH0885809A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6918701B2 (en) | 2001-02-27 | 2005-07-19 | Oiles Corporation | Synthetic resin-made sliding bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20011120 |