JPH02182811A - Furnace top charging apparatus in bellless blast furnace having preventing facility to channeling flow - Google Patents
Furnace top charging apparatus in bellless blast furnace having preventing facility to channeling flowInfo
- Publication number
- JPH02182811A JPH02182811A JP115089A JP115089A JPH02182811A JP H02182811 A JPH02182811 A JP H02182811A JP 115089 A JP115089 A JP 115089A JP 115089 A JP115089 A JP 115089A JP H02182811 A JPH02182811 A JP H02182811A
- Authority
- JP
- Japan
- Prior art keywords
- chute
- vertical chute
- raw material
- furnace
- furnace top
- 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.)
- Pending
Links
- 230000005465 channeling Effects 0.000 title 1
- 239000002994 raw material Substances 0.000 claims abstract description 38
- 241000273930 Brevoortia tyrannus Species 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 5
- 230000002265 prevention Effects 0.000 claims 2
- 238000007599 discharging Methods 0.000 abstract 2
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000007789 sealing Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002801 charged material Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000001846 repelling effect Effects 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
- Blast Furnaces (AREA)
Abstract
Description
【発明の詳細な説明】
[産業上の利用分野]
本発明は炉内装入物の偏流防止機能を有するペルレス高
炉の炉頂装入装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a top charging device for a pelletless blast furnace having a function of preventing drift of contents in the furnace.
【従来の技術]
第2図は高炉の原料装入によって生ずる高炉内周方向の
鉱石/コークス(0/C)分布偏差の発生状況の一例を
示す図である。高炉装入装置は。[Prior Art] FIG. 2 is a diagram showing an example of the occurrence of ore/coke (0/C) distribution deviation in the inner peripheral direction of the blast furnace, which is caused by charging raw materials into the blast furnace. Blast furnace charging equipment.
対向設置の複数の炉mバンカ1.2と、垂直シュート3
と、変向の可能な旋回シュート4とからなる。この装入
装置を通して原料を装入すると次のような問題点が生ず
る。Multiple furnace m bunkers 1.2 and vertical chute 3 installed opposite each other
and a turning chute 4 that can change direction. When raw materials are charged through this charging device, the following problems occur.
垂直シュート3内を通過する原料は、どちらの炉頂バン
カ1.2から排出するかで、垂直シュート内の異なる位
置を落下のルートとして選び、その結果偏流を起こすよ
うになる。そのために落下する原料は、旋回シュート4
上の異なる位置に落下するから、その偏流の差だけシュ
ート上での移動距離がdi、d2.と変動し、これがた
め移動時間、シュートを離れる原料落下速度、落下の軌
跡が変動し、最終的には炉内堆積位置が変動して装入物
層の炉周方向の装入物の分布偏差、とりわけ第2図のプ
ロフィル中に見られるようなO/C分布の偏差を生じる
に至る。The raw material passing through the vertical chute 3 selects different positions within the vertical chute as a fall route depending on which furnace top bunker 1.2 it is discharged from, resulting in a drifted flow. For this purpose, the falling raw materials are transported through the rotating chute 4
Since they fall at different positions on the chute, the distance traveled on the chute is di, d2. As a result, the travel time, material falling speed leaving the chute, and falling trajectory change, and ultimately the deposition position in the furnace changes, resulting in a deviation in the distribution of the charge in the direction of the furnace circumference in the charge layer. , leading to deviations in the O/C distribution, especially as seen in the profile of FIG.
以上の説明から判るように、2つの炉頂バンカl、2の
うち、一方から鉱石を切り出し他方からはコークスを切
出してこれを交互に継続すると、炉周方向0/C分布に
大きな偏りを生ずる原因となる。As can be seen from the above explanation, if ore is cut from one of the two top bunkers 1 and 2 and coke is cut from the other, and this continues alternately, a large deviation occurs in the O/C distribution in the circumferential direction. Cause.
これらの問題を解決するため、実公昭59−5725で
は炉中心軸上に排出口を有するホッパを二個垂直に配置
した装入装置を開示している。この装置では2円周方向
のアンバランスは解消するが、装入速度が低下する。ま
た、装置の高さが高くなるので設備費が増大するという
問題を有している。In order to solve these problems, Japanese Utility Model Publication No. 59-5725 discloses a charging device in which two hoppers having discharge ports are disposed vertically on the central axis of the furnace. Although this device eliminates the unbalance in the two circumferential directions, the charging speed decreases. Furthermore, since the height of the device increases, there is a problem in that the equipment cost increases.
また、特公昭61−30993ではカットゲートを設け
て垂直シュート内の流れを絞って炉中心軸上に原料が落
下するようにしている。特開昭53−102808では
、垂直シュート上部にコーンを設は偏流を防止する方法
が開示されている。これらの技術は、いずれも原料の落
下する流路を著しく狭くすることにより、原料の落下軌
跡を制御しようとするものである。Further, in Japanese Patent Publication No. 61-30993, a cut gate is provided to restrict the flow in the vertical chute so that the raw material falls onto the central axis of the furnace. Japanese Patent Application Laid-Open No. 53-102808 discloses a method for preventing drifting by installing a cone on the top of a vertical chute. All of these techniques attempt to control the falling trajectory of the raw material by significantly narrowing the flow path through which the raw material falls.
[発明が解決しようとする課題」
原料の落下流路を狭くすると鉱石、コークスがカットゲ
ート上、コーン上に棚吊りをおこすという問題が生ずる
。効果的に同心軸上に原料を落下させるには落下流路を
原料が詰った状態で流れるように著しく流路を絞る必要
がある。流路を絞ると、原料の水分等が変動して原料の
流れが悪くなったとき、詰りを生じ易く、高炉への原料
の供給を安定的に制御することが困難となる。[Problems to be Solved by the Invention] When the falling flow path of raw materials is narrowed, a problem arises in that ore and coke are suspended on the cut gate and cone. In order to effectively drop the raw material onto the concentric axis, it is necessary to significantly narrow down the falling flow channel so that the raw material flows in a clogged state. If the flow path is narrowed, clogging is likely to occur when the flow of the raw material deteriorates due to fluctuations in the moisture content of the raw material, making it difficult to stably control the supply of raw material to the blast furnace.
本発明は複数の並列に配置された炉頂バンカと、これら
のバンカの排出原料を誘導する鉛直シュートと、この鉛
直シュートからの落下物を受けて高炉内に旋回散布する
旋回シュートとからなるペルレス装入装置において、原
料の流路を絞らずに、落下軌跡を制御することにより、
炉中心軸に沿って高炉に原料を供給し、前述のペルレス
高炉の問題点を解消することにある。The present invention consists of a plurality of furnace top bunkers arranged in parallel, a vertical chute that guides the raw materials discharged from these bunkers, and a rotating chute that receives fallen materials from the vertical chute and swirls and scatters them into the blast furnace. In the charging device, by controlling the falling trajectory of the raw material without restricting the flow path,
The purpose is to supply raw materials to the blast furnace along the central axis of the furnace, thereby solving the problems of the above-mentioned pelletless blast furnace.
〔課題を解決するための手段1
本発明は鉛直シュート内壁面の炉頂バンカ排出口に対向
する位置に、シュートの内壁面から鉛直シュート内に向
かって前進後退自在な反摺板を設けたことを特徴として
いる。[Means for Solving the Problems 1] The present invention provides a rubbing plate that can move forward and backward from the inner wall surface of the chute toward the inside of the vertical chute, at a position facing the top bunker discharge port on the inner wall surface of the vertical chute. It is characterized by
また1本発明の他の発明は複数の並列に配置された炉頂
バンカと、該バンカの排出原料を炉心方向に誘導する集
合シュートと、集合シュートからの原料を受けて下方に
落下させる鉛直シュートと、該鉛直シュートからの落下
物を受けて高炉内に旋回散布する旋回シュートとからな
るペルレス装入装置において、集合シュートには各炉頂
バンカ下に鉛直シュートに至る案内溝を設けると共に鉛
直シュートに入口にノツチ状の案内切欠を設け、鉛直シ
ュートには、各炉頂バンカから排出された原料が鉛直シ
ュート内壁面に衝突するそれぞれの位置の下方であって
、それぞれ鉛直高さの異なる位置の壁面に突起を突出し
たことを特徴としている6
[作用]
従来装置では、バンカから排出された装入原料が集合ホ
ッパを流れる時に生じる水平方向速度成分が存在するこ
とが円周方向バランスを悪くする原因であった。Another aspect of the present invention is a plurality of furnace top bunkers arranged in parallel, a collection chute that guides the discharged raw materials from the bunkers toward the core, and a vertical chute that receives the raw materials from the collection chutes and drops them downward. In the pelletless charging device, the collecting chute is provided with a guide groove leading to the vertical chute under each furnace top bunker, and the collecting chute is provided with a guide groove leading to the vertical chute under each furnace top bunker. A notch-shaped guide notch is provided at the inlet of the vertical chute, and the vertical chute has a groove at a different vertical height below each position where the raw material discharged from each furnace top bunker collides with the inner wall surface of the vertical chute. It is characterized by protrusions protruding from the wall surface 6. [Function] In conventional equipment, the presence of a horizontal velocity component that occurs when the charging material discharged from the bunker flows through the collecting hopper deteriorates the circumferential balance. It was the cause.
本発明では鉛直シュートの壁面に前進後退自在な反発板
を備え、落下物が炉内で偏在しないように各バンカ毎に
その位置を調整することができる。これにより各バンカ
毎に装入原料の流下する経路を調整して旋回シュートの
旋回中心に原料を供給することが可能となる。この反発
板は原料通路を狭くすることがない。In the present invention, a repelling plate that can move forward and backward is provided on the wall of the vertical chute, and its position can be adjusted for each bunker so that falling objects are not unevenly distributed in the furnace. This makes it possible to adjust the flow path of the charged raw material for each bunker and supply the raw material to the center of rotation of the rotating chute. This repulsion plate does not narrow the raw material passage.
また1本発明の第2の発明では、各バンカから排出され
た原料が集合シュートで溝に案内され、鉛直シュート入
口の切欠で落下流路を規制され、鉛直シュートの壁面に
当たって、反転する位置の下方に突起を設けて落下経路
を修正するようにした。その結果、装入原料の落下経路
を旋回シュートの旋回中心に向わせることができる。In addition, in the second invention of the present invention, the raw materials discharged from each bunker are guided into the groove by the collecting chute, the falling flow path is regulated by the notch at the entrance of the vertical chute, and the raw material hits the wall of the vertical chute, and the material is at the reversing position. A protrusion was provided at the bottom to correct the falling path. As a result, the falling path of the charged material can be directed toward the center of rotation of the rotating chute.
〔実施例1
第1図は本発明の装置の一実施例を示すもので(a)平
面図、(b)縦断面図である。バンカ1から排出された
原料11は集合シュート8上を滑走して鉛直シュート3
に入り、その下方にある旋回シュート(図示省略)に供
給される。この原料の流れが鉛直シュート3の壁面に衝
突する位置に反発板5が設けられている。第1図(a)
に示すようにバンカ1の排出口の位置10に対向してお
り、バンカが3ケある場合は3この反発板が設けられる
。[Embodiment 1 Figure 1 shows an embodiment of the apparatus of the present invention, and is (a) a plan view and (b) a longitudinal sectional view. The raw material 11 discharged from the bunker 1 slides on the collecting chute 8 and passes through the vertical chute 3.
and is supplied to a rotating chute (not shown) located below. A repulsion plate 5 is provided at a position where the flow of the raw material collides with the wall surface of the vertical chute 3. Figure 1(a)
As shown in FIG. 1, they face the discharge port position 10 of the bunker 1, and if there are three bunkers, three repulsion plates are provided.
反発板5はガスシール部6を貫通する駆動軸7に取りつ
けられ、駆動モータ7aにより前進後退自在となってい
る。The repulsion plate 5 is attached to a drive shaft 7 passing through the gas seal portion 6, and can be moved forward and backward by a drive motor 7a.
駆動モータ7aは原料11が常に旋回シュートの旋回中
心に落下するように反発板5の進退量を調整する。The drive motor 7a adjusts the amount of movement of the repulsion plate 5 so that the raw material 11 always falls at the center of rotation of the rotation chute.
第3図は本発明の別の実施例を示すものでバンカlから
排出される原料流を集合シュート8に設けた案内溝13
、および鉛直シュート3の上端に設けた切欠14によっ
て一方向の流れに整粒して鉛直シュート3内に供給する
。FIG. 3 shows another embodiment of the present invention, in which a guide groove 13 provided in a collecting chute 8 guides the raw material flow discharged from the bunker l.
, and a notch 14 provided at the upper end of the vertical chute 3, the grains are sorted into a unidirectional flow and fed into the vertical chute 3.
鉛直シュート3内にはこの供給流れが壁に当たる位置よ
り下方に突起12を設けて落下流の経路を調整する。突
起12は鉛直シュート3内で鉛直高さ位置を不同にし、
鉛直シュートが詰り事故などを起さないようにしである
。A protrusion 12 is provided in the vertical chute 3 below the position where this supply flow hits the wall to adjust the path of the falling flow. The protrusions 12 have different vertical height positions within the vertical chute 3,
This is to prevent the vertical chute from clogging and causing accidents.
通常突起12に衝突した原料は突起斜面方向にむきを変
えて流れる。従って、突起の位置と、突起斜面の傾きを
適正に選ぶことにより、旋回シュート回転軸上に原料を
落下させることができる。Normally, the raw material that collides with the protrusion 12 changes direction and flows in the direction of the protrusion slope. Therefore, by appropriately selecting the position of the projection and the slope of the slope of the projection, it is possible to drop the raw material onto the rotating shaft of the rotating chute.
次に第4図によって実施例の効果を説明する。Next, the effects of the embodiment will be explained with reference to FIG.
炉容積:2580rrl”
炉頂バンカ設置数:3個
送風量:400ONrr?/hr
出銑比二1.6
の高炉において本発明の第1.2の発明を実施した。第
1の発明を実施するに際して、まず第2の発明を先に実
施し、第4図に示す効果を確認して大改造となる第1の
発明を実施した。Furnace volume: 2580rrl Number of furnace top bunkers installed: 3 Air flow rate: 400ONrr?/hr Invention 1.2 of the present invention was implemented in a blast furnace with an iron production ratio of 21.6.Putting the 1st invention into practice At this time, the second invention was first implemented, and after confirming the effect shown in FIG. 4, the first invention, which was a major modification, was implemented.
その結果、
■ 円周方向で8ケ所設置されたスキンフロー温度計の
円周方向の偏差が減少した。第4図に炉上部の円周方向
の均一性を表わすスキンフロー温度計8点の偏差0の変
化を示した0本方式採用後急激に偏差が減少し、約1/
3となっている。As a result: (1) The deviation in the circumferential direction of the skin flow thermometers installed at eight locations in the circumferential direction was reduced. Figure 4 shows the change in the deviation of 8 skin flow thermometers, which shows the uniformity in the circumferential direction of the upper part of the furnace.After adopting the 0-point method, the deviation decreased rapidly to about 1/1.
It is 3.
■ 出銑中のSiの変動が抑制された。■ Fluctuations in Si during tapping were suppressed.
第4図に示すように溶銑中[Si]の変動が減少してお
り1本方法の採用により円周方向の不均一性が解消した
ことがわかる5
■ 出銑温度の変動の抑制が可能になった。As shown in Figure 4, the fluctuations in [Si] in the hot metal have decreased, indicating that the non-uniformity in the circumferential direction has been eliminated by adopting the single method.5 ■ It is possible to suppress fluctuations in the tapping temperature. became.
そのために従来変動の下側つまり最低出銑温度でも変動
が少なくなった。すなわち、第4図のように、溶銑温度
の変動が減少した°ため平均溶銑温度の低下が可能とな
り、溶銑温度が約1493℃まで低下している。この結
果、[Si]が0.2%低下しており、このことによる
経済的効果は著しいものがある。For this reason, there is less variation even at the lower end of the conventional variation, that is, the lowest tapping temperature. That is, as shown in FIG. 4, since the fluctuation in hot metal temperature has decreased, the average hot metal temperature can be lowered, and the hot metal temperature has decreased to about 1493°C. As a result, [Si] decreased by 0.2%, which has a significant economic effect.
[発明の効果1
本発明によれば、並列バンカ方式のペルレス高炉に特有
の炉内円周方向の温度の不均一性を解消することができ
る。その結果として溶銑中[S i ] 、溶銑温度の
出跣口毎の偏差を解消することにか可能となった。[Advantageous Effects of the Invention 1] According to the present invention, it is possible to eliminate the non-uniformity of temperature in the circumferential direction inside the furnace, which is peculiar to a parallel bunker type perleless blast furnace. As a result, it has become possible to eliminate deviations in hot metal [S i ] and hot metal temperature for each taphole.
第1図は本発明の説明図であって、(a)は鉛直シュー
トの平面図、(b)はその縦断面図、第2図は高炉の炉
[白部の縦断面図、第3図は伯の実施例の説明図であっ
て(a)は鉛直シュートの平面図、(b)はその縦断面
図、第4図は本発明の効果を示すグラフである。
l、2・・−炉頂バンカ
3・・−鉛直シュート
4・−・旋回シュート
5・−可動反摺板
6・・・ガスシール部
7・・・駆動軸
7a・・−駆動モータFIG. 1 is an explanatory diagram of the present invention, in which (a) is a plan view of a vertical chute, (b) is a vertical cross-sectional view thereof, and FIG. FIG. 4 is an explanatory diagram of the embodiment of Haku, in which (a) is a plan view of a vertical chute, (b) is a longitudinal sectional view thereof, and FIG. 4 is a graph showing the effects of the present invention. l, 2...-Furnace top bunker 3...-Vertical chute 4...-Swivel chute 5--Movable rubbing plate 6...Gas seal portion 7...Drive shaft 7a...-Drive motor
Claims (1)
排出原料を下方に誘導する鉛直 シュートと、該鉛直シュートからの落下物を受けて高炉
内に旋回散布する旋回シュートとからなるペルレス装入
装置において、 鉛直シュート内壁面の炉頂バンカ排出口に 対向する位置に、該シュート内壁面から鉛直シュート内
に向かって前進後退自在な反摺板を設けたことを特徴と
する偏流防止機能を有するペルレス高炉の炉頂装入装置
。 2 複数の並列に配置された炉頂バンカと、該バンカの
排出原料を炉心方向に誘導する集合シュートと、該集合
シュートからの原料を受けて下方に落下させる鉛直シュ
ートと、該鉛直シュートからの落下物を受けて高炉内に
旋回散布する旋回シュートとからなるペルレス装入装置
において、 前記集合シュートには、各炉頂バンカ下に 鉛直シュートに至る案内溝を設けると共に 鉛直シュート入口にノッチ状の案内切欠を設け、前記鉛
直シュートには、各炉頂バンカから排出された原料が鉛
直シュート内壁面に衝突するそれぞれの位置の下方であ
ってそれぞれ鉛直高さの異なる位置の壁面に、突起を突
出したことを特徴とする偏流防止機能を有するペルレス
高炉の炉頂装入装置。[Scope of Claims] 1. A plurality of furnace top bunkers arranged in parallel, a vertical chute that guides the raw material discharged from the bunkers downward, and a rotating system that receives fallen materials from the vertical chute and swirls and scatters them into the blast furnace. A perleless charging device consisting of a chute is characterized in that a rubbing plate is provided on the inner wall of the vertical chute at a position facing the furnace top bunker outlet, and is movable forward and backward from the inner wall of the chute toward the inside of the vertical chute. A furnace top charging device for a pelless blast furnace that has a drift prevention function. 2. A plurality of furnace top bunkers arranged in parallel, a collection chute that guides the discharged raw material from the bunkers toward the core, a vertical chute that receives the raw material from the collection chute and drops it downward, and a In a pelletless charging device consisting of a rotating chute that receives falling objects and swirls and scatters them into the blast furnace, the collecting chute is provided with a guide groove leading to the vertical chute below each furnace top bunker, and a notch-shaped groove at the entrance of the vertical chute. A guide notch is provided, and the vertical chute has projections protruding from the wall surface at different vertical heights below the respective positions where the raw material discharged from each furnace top bunker collides with the inner wall surface of the vertical chute. A furnace top charging device for a pelletless blast furnace having a drift prevention function.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP115089A JPH02182811A (en) | 1989-01-09 | 1989-01-09 | Furnace top charging apparatus in bellless blast furnace having preventing facility to channeling flow |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP115089A JPH02182811A (en) | 1989-01-09 | 1989-01-09 | Furnace top charging apparatus in bellless blast furnace having preventing facility to channeling flow |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH02182811A true JPH02182811A (en) | 1990-07-17 |
Family
ID=11493411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP115089A Pending JPH02182811A (en) | 1989-01-09 | 1989-01-09 | Furnace top charging apparatus in bellless blast furnace having preventing facility to channeling flow |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH02182811A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8092136B2 (en) * | 2006-01-20 | 2012-01-10 | Paul Wurth S.A. | Multiple hopper charging installation for a shaft furnace |
US8152430B2 (en) | 2006-01-20 | 2012-04-10 | Paul Wurth S.A. | Three hopper charging installation for a shaft furnace |
-
1989
- 1989-01-09 JP JP115089A patent/JPH02182811A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8092136B2 (en) * | 2006-01-20 | 2012-01-10 | Paul Wurth S.A. | Multiple hopper charging installation for a shaft furnace |
US8152430B2 (en) | 2006-01-20 | 2012-04-10 | Paul Wurth S.A. | Three hopper charging installation for a shaft furnace |
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