JPH0619090B2 - Oxygen blast furnace - Google Patents
Oxygen blast furnaceInfo
- Publication number
- JPH0619090B2 JPH0619090B2 JP30913386A JP30913386A JPH0619090B2 JP H0619090 B2 JPH0619090 B2 JP H0619090B2 JP 30913386 A JP30913386 A JP 30913386A JP 30913386 A JP30913386 A JP 30913386A JP H0619090 B2 JPH0619090 B2 JP H0619090B2
- Authority
- JP
- Japan
- Prior art keywords
- gas
- blast furnace
- furnace
- temperature
- oxygen
- 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】 「発明の目的」 （産業上の利用分野） この発明は製鉄用高炉、特にシャフト部に予熱ガス吹き
込みノズルを有する酸素高炉に関するものである。DETAILED DESCRIPTION OF THE INVENTION "Object of the Invention" (Field of Industrial Application) The present invention relates to an iron blast furnace, and more particularly to an oxygen blast furnace having a preheating gas blowing nozzle in a shaft portion.
（従来の技術） 従来、鉱石から銑鉄を製造するための所謂、高炉製銑法
においては若干の酸素富化は行うものの生産性の高い実
用高炉について云えば、略全部が羽口からの高温の空気
を送風の主体としている。空気中の約７９％を占めるN2
は鉄鉱石の還元には直接関与しないが羽口先からストッ
クラインまでの装入物に膨大な顕熱を与えガス還元を活
発に行うに必要な熱補給の役目を果していたので特に羽
口以外より熱を補給する必要はなかったが、高炉の生産
性の向上の見地から近年開発されつつある酸素高炉にお
いては、羽口先きの温度上昇に対する温度制御用の炉頂
ガス、水蒸気等の添加の他にN2不在のためのガス量の低
下に伴なう７００℃以上のガス還元域の狭少化、炉上部
の温度低下の熱補償のためにシャフト部からの熱補給が
必要とされる。例えば特開昭６０−１５９１０４には炉
頂ガスの一部を分取しこれを燃焼しシャフトから吹き込
むことが示されている。又、酸素高炉ではないが高酸素
富化送風と炉頂ガスの再成還元ガスを羽口より送風する
特公昭５０−２２９６６でもガス量不足をおぎなうため
にシャフト部から非酸化性のガスが吹き込まれている。(Prior Art) Conventionally, in a so-called blast furnace pig-making method for producing pig iron from ore, although oxygen is slightly enriched, a practical blast furnace with high productivity has almost all of the high temperature from tuyere. Air is the main source of air. N 2 occupies about 79% of the air
Is not directly involved in the reduction of iron ore, but gave a huge amount of sensible heat to the charge from the tuyere to the stock line, and played a role of heat supply necessary for actively performing gas reduction, so that it was especially better than the one other than the tuyere. Although it was not necessary to supplement the heat, in the oxygen blast furnace that has been developed in recent years from the viewpoint of improving the productivity of the blast furnace, in addition to the addition of top gas, steam, etc. for temperature control against the temperature rise at the tuyere tip, In addition, it is necessary to supplement the heat from the shaft part to narrow the gas reduction area above 700 ° C due to the decrease in the amount of gas due to the absence of N 2 and to compensate for the temperature decrease in the upper part of the furnace. For example, Japanese Unexamined Patent Publication No. 60-159104 discloses that a part of the furnace top gas is taken, burned, and blown from a shaft. In addition, even though it is not an oxygen blast furnace, Japanese Patent Publication No. 50-22966, which blows high oxygen-enriched air and regenerating and reducing gas from the furnace top gas, also blows non-oxidizing gas from the shaft in order to fill the gas shortage. Has been.
しかし乍ら、これらは全て同一平面１段でしかもノズル
の設置角度に関するものはない。However, all of them are in the same plane and one step, and there is nothing related to the installation angle of the nozzle.
（発明が解決しようとする問題点） 本発明はこのような酸素高炉の現状に鑑み創案されたも
のであり、１段もしくは複数段のレベルから所定の傾斜
角度で予熱ガスを吹き込むことにより、炉内装入物の垂
直方向並びに水平円周方向の温度制御を同時に行なうこ
とを可能とし、低燃料比でトラブルの発生しない長期の
安定操業を確立することを目的とするものである。(Problems to be Solved by the Invention) The present invention was devised in view of the current situation of such an oxygen blast furnace, and the preheating gas is blown at a predetermined inclination angle from the level of one stage or a plurality of stages so that the furnace is heated. The purpose of the present invention is to enable vertical and horizontal circumferential temperature control of the interior contents at the same time, and to establish a stable operation for a long period of time with a low fuel ratio and no trouble.
「発明の構成」 （問題点を解決するための手段） 上記目的を達成するために、本発明者等は、シャフト部
に１段もしくは複数段の予熱ガス吹込みノズルを、装入
物の安息角よりも大きい傾斜角度で設けたことを特徴と
する酸素高炉、 を茲に提案する。[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present inventors have provided a shaft with a single-stage or multiple-stage preheated gas injection nozzle to provide a rest for the charge. We propose an oxygen blast furnace, which is characterized in that it is provided with an inclination angle larger than the angle.
本発明方法の採用により、単に炉上部に対する熱補給の
みに止まらず、炉内装入物の垂直方向もしくは水平円周
方向の何れの温度制御も同時にもしくは別個に可能とな
るものである。By adopting the method of the present invention, it is possible to control not only the heat supply to the upper part of the furnace but also the temperature control in the vertical direction of the furnace interior or in the horizontal circumferential direction simultaneously or separately.
（作用） 本発明において酸素高炉とは、羽口から酸素濃度４０％
以上のガスを常温で吹き込み、且つシャフトから予熱ガ
スを吹き込んで操業する高炉のことである。(Operation) In the present invention, the oxygen blast furnace means an oxygen concentration of 40% from the tuyere
This is a blast furnace in which the above gases are blown at room temperature and preheated gas is blown from the shaft to operate.
第１図は、高炉の予熱ガス吹き込み１段の場合のノズル
位置における水平断面図に本発明方法の実施に使用する
予熱ガス吹き込み口の位置を模式的に示したもので、炉
壁１と予熱ガス吹き込みノズル２の関係を示す。酸素高
炉は、通常の高炉に比較して羽口先燃焼温度が高くなり
炉頂ガス等の温度調節剤の添加により羽口先の温度コン
トロールがなされるが、一般的には通常高炉の羽口先の
温度コントロールより困難である。しかし、中部ゾンデ
により測定される装入物もしくはガス温の分布に基づ
き、１段又は複数段、各段複数個設けられた予熱ガスの
吹き込み口から方角別に上下揃ってガス量、もしくはガ
ス温を同時に変更せしめた場合は、従来の一平面での制
御よりその効果の現れる時間が遥かに早くなる。FIG. 1 is a horizontal cross-sectional view at the nozzle position in the case of the first stage of preheating gas injection in the blast furnace, schematically showing the positions of the preheating gas injection port used for carrying out the method of the present invention. The relationship of the gas blowing nozzle 2 is shown. Oxygen blast furnace has a higher tuyere tip combustion temperature than that of a normal blast furnace, and the temperature of the tuyere tip is controlled by the addition of a temperature control agent such as furnace top gas. More difficult to control. However, based on the distribution of the charge or the gas temperature measured by the central sonde, the gas amount or the gas temperature can be adjusted in the vertical direction from the preheated gas injection port provided in one or more stages, or multiple stages. If they are changed at the same time, the effect takes much longer than the conventional one-plane control.
又、複数段設ける場合、例えば上、中、下段毎にガス温
度を変えたり、ガス量を変えたり、又、隣接する同一レ
ベルのガス吹込み口からの量、温度を適宜変更しうるよ
うに設計することも可能であり数多くのパターンの炉内
制御が可能となる。Also, when a plurality of stages are provided, for example, the gas temperature can be changed for each of the upper, middle, and lower stages, the gas amount can be changed, and the amount and temperature from the adjacent gas injection ports of the same level can be appropriately changed. It is possible to design it, and it is possible to control many patterns in the furnace.
各段毎のガス吹き込み口の数には特に制限はないが、炉
壁の近い部分のガス組成、温度等がストックラインで略
同一となるためには８〜１８個位が適当である。又、吹
き込み段数は１〜４段の範囲が好ましい。The number of gas blowing ports for each stage is not particularly limited, but about 8 to 18 is suitable so that the gas composition, temperature, etc. of the portion near the furnace wall are substantially the same in the stock line. The number of blowing stages is preferably in the range of 1 to 4.
尚請求範囲にも記載したようにガス吹き込みノズルは装
入物の安息角よりも大きな傾斜で炉壁に取りつけられる
必要がある。これは粉粒状の装入物がガス吹き込み装置
に詰ることのないようにしたものである。一般的には水
平から２０〜５０゜下向きにすべきである。又、複数段
に吹込まれる場合には第３図に図示するように上下の吹
き込み位置は千鳥に配置する方が炉周壁に均一なガスの
流れをつくる上からも必要である。尚図示はしなかった
が温度が同じで量のみの変更を行なう場合は高温の予熱
ガスは従来の高炉の熱風環状管のようなメインの配管を
設けこれから各吹き込み口へ分割して吹き込むことが望
ましい。As described in the claims, the gas blowing nozzle needs to be attached to the furnace wall with an inclination larger than the repose angle of the charge. This is to prevent the powder-like charge from clogging the gas blowing device. Generally it should be 20 to 50 ° down from the horizontal. Further, in the case of blowing in a plurality of stages, it is necessary to arrange the upper and lower blowing positions in a zigzag manner as shown in FIG. 3 in order to create a uniform gas flow on the peripheral wall of the furnace. Although not shown, when the temperature is the same and only the amount is changed, the high-temperature preheating gas can be blown by dividing it into each blowing port from a main pipe such as the hot-air annular pipe of the conventional blast furnace. desirable.
（実施例） 実施例１は吹き込み傾斜角度２５゜、１段の予熱ガス吹
き込みノズルの数１６本、を上下４ｍ離して第３図のよ
うに千鳥状に２段に設置した。実施例２の第２図はノズ
ル１段の場合の配置を示し、第３図は実施例１の垂直断
面略図であり２段のガス吹込みノズルの他に送風羽口３
が示されている。(Example) In Example 1, a blowing inclination angle of 25 ° and the number of 16 preheating gas blowing nozzles in one stage were vertically separated by 4 m and arranged in two staggered patterns as shown in FIG. FIG. 2 of the second embodiment shows the arrangement in the case of a single stage nozzle, and FIG. 3 is a schematic vertical sectional view of the first example.
It is shown.
第５図は本発明を実施する酸素高炉の操業フローを示す
概要図であって、高炉１１よりの炉頂はガス清浄系１２
を経てガスホルダー１３へ導かれるがガスの１部はブー
スター１４を経て予熱ガス燃焼装置１５へ導びかれ酸素
源１６からのガスにより燃焼せられ高温の予熱ガスとな
って予熱ガス吹き込みノズル１９より炉内に吹き込まれ
る。一方羽口１７へは、酸素源１６からの酸素、ブース
ター１４′を経た羽口先温度調整ガスとしての炉頂ガ
ス、および微粉炭貯槽１８からの微粉炭が送給される。FIG. 5 is a schematic diagram showing the operation flow of the oxygen blast furnace for carrying out the present invention, in which the top of the blast furnace 11 is the gas cleaning system 12
Part of the gas is guided to the preheated gas combustor 15 via the booster 14 and burned by the gas from the oxygen source 16 to become high-temperature preheated gas from the preheated gas injection nozzle 19. It is blown into the furnace. On the other hand, to the tuyere 17, oxygen from the oxygen source 16, the furnace top gas as the tuyere tip temperature adjusting gas passing through the booster 14 ', and the pulverized coal from the pulverized coal storage tank 18 are fed.
「発明の効果」 以上詳述したようにシャフトに１段もしくは複数段に所
定の傾斜角度で予熱ガス吹き込みノズルを設うけ高さ
別、方角別にガス量もしくはガス温度を変えて予熱ガス
を炉内に吹き込むことが可能となったので炉内装入物の
温度制御をトラブルなしに敏速にしかも効果的に行なう
ことができる。[Advantages of the Invention] As described in detail above, the preheating gas is injected into the furnace by changing the gas amount or the gas temperature according to the height and direction depending on the height of the shaft and the nozzles for injecting the preheating gas at a predetermined inclination angle in one or more stages. Since it is possible to blow into the furnace, the temperature control of the furnace interior charge can be performed promptly and effectively without any trouble.
第１図は本発明の酸素高炉で予熱ガス吹込み位置におけ
る水平断面略図を示したもので、第２図は本発明のガス
吹込みノズル１段を備えた酸素高炉の垂直断面略図を示
し第３図はガス吹込ノズル２段を備えた実施例の垂直断
面略図である。第４図は本発明の高炉における上下段の
ガス吹き込みノズルの垂直位置関係を示すものである。
第５図は本発明の実施される高炉操業のフローの概要図
である。 １：炉壁 ２：予熱ガス吹込ノズル ３：羽口 １１：高炉 １２：ガス清浄系 １３：ガスホルダー １４：ブースター １４′：ブースター １５：予熱ガス燃焼装置 １６：酸素源 １７：羽口 １８：微粉炭貯槽 １９：予熱ガス吹込ノズルFIG. 1 is a schematic horizontal sectional view of an oxygen blast furnace of the present invention at a preheating gas injection position, and FIG. 2 is a vertical sectional schematic view of an oxygen blast furnace having one gas injection nozzle of the present invention. FIG. 3 is a schematic vertical sectional view of an embodiment having two stages of gas injection nozzles. FIG. 4 shows the vertical positional relationship between the upper and lower gas injection nozzles in the blast furnace of the present invention.
FIG. 5 is a schematic diagram of a blast furnace operation flow in which the present invention is carried out. 1: Furnace wall 2: Preheating gas injection nozzle 3: Tuyere 11: Blast furnace 12: Gas cleaning system 13: Gas holder 14: Booster 14 ': Booster 15: Preheating gas combustion device 16: Oxygen source 17: Tuyere 18: Fine powder Charcoal storage tank 19: Preheating gas injection nozzle
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−159104（ＪＰ，Ａ) 特開 昭55−21555（ＪＰ，Ａ) 特開 昭59−173210（ＪＰ，Ａ) 特公 昭50−22966（ＪＰ，Ｂ２) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-159104 (JP, A) JP-A-55-21555 (JP, A) JP-A-59-173210 (JP, A) JP-B-50- 22966 (JP, B2)
Claims (1)
ス吹き込みノズルを、装入物の安息角よりも大きい傾斜
角度で設けたことを特徴とする酸素高炉。1. An oxygen blast furnace, characterized in that one or more stages of preheating gas injection nozzles are provided on the shaft portion at an inclination angle larger than the repose angle of the charge.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30913386A JPH0619090B2 (en) | 1986-12-27 | 1986-12-27 | Oxygen blast furnace |
| AU82946/87A AU596253B2 (en) | 1986-12-27 | 1987-12-22 | A blast furnace |
| ZA879642A ZA879642B (en) | 1986-12-27 | 1987-12-23 | A blast furnace |
| KR1019870014984A KR930004473B1 (en) | 1986-12-27 | 1987-12-26 | Process for making iron in the blast furnace |
| CN87105991A CN1007161B (en) | 1986-12-27 | 1987-12-26 | Blast furnace |
| DE87119248T DE3787518T2 (en) | 1986-12-27 | 1987-12-28 | Blast furnace process. |
| EP87119248A EP0273420B1 (en) | 1986-12-27 | 1987-12-28 | A blast furnace method |
| IN19/BOM/88A IN167064B (en) | 1986-12-27 | 1988-01-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30913386A JPH0619090B2 (en) | 1986-12-27 | 1986-12-27 | Oxygen blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63166911A JPS63166911A (en) | 1988-07-11 |
| JPH0619090B2 true JPH0619090B2 (en) | 1994-03-16 |
Family
ID=17989290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30913386A Expired - Lifetime JPH0619090B2 (en) | 1986-12-27 | 1986-12-27 | Oxygen blast furnace |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0619090B2 (en) |
| IN (1) | IN167064B (en) |
| ZA (1) | ZA879642B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5779839B2 (en) * | 2010-03-31 | 2015-09-16 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| JP6604344B2 (en) * | 2017-02-15 | 2019-11-13 | Ｊｆｅスチール株式会社 | Preheating gas blowing device to blast furnace shaft, preheating gas blowing method and blast furnace operating method |
-
1986
- 1986-12-27 JP JP30913386A patent/JPH0619090B2/en not_active Expired - Lifetime
-
1987
- 1987-12-23 ZA ZA879642A patent/ZA879642B/en unknown
-
1988
- 1988-01-28 IN IN19/BOM/88A patent/IN167064B/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63166911A (en) | 1988-07-11 |
| IN167064B (en) | 1990-08-25 |
| ZA879642B (en) | 1988-06-21 |
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