JPS63171810A - Firing method for oxygen blast furnace - Google Patents

Firing method for oxygen blast furnace

Info

Publication number
JPS63171810A
JPS63171810A JP185787A JP185787A JPS63171810A JP S63171810 A JPS63171810 A JP S63171810A JP 185787 A JP185787 A JP 185787A JP 185787 A JP185787 A JP 185787A JP S63171810 A JPS63171810 A JP S63171810A
Authority
JP
Japan
Prior art keywords
tuyere
oxygen
blast furnace
gas
firing
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
Application number
JP185787A
Other languages
Japanese (ja)
Inventor
Kazumasa Wakimoto
一政 脇元
Hitoshi Kawada
仁 川田
Yotaro Ono
大野 陽太郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP185787A priority Critical patent/JPS63171810A/en
Priority to CN 88100068 priority patent/CN1007431B/en
Publication of JPS63171810A publication Critical patent/JPS63171810A/en
Pending legal-status Critical Current

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  • Manufacture Of Iron (AREA)
  • Blast Furnaces (AREA)

Abstract

PURPOSE:To simply and surely execute the firing and to start the smooth operation, by starting oxygen blasting by inserting firing source in front of tuyere and at the same time, executing blowing of preheated gas from a shaft part. CONSTITUTION:The firing source is inserted in the front part of tuyere 9 in the blast furnace 1 and by supplying oxygen from an oxygen source 7 into the tuyere 9, the firing and the blasting is started. At the same time, the blowing of preheated gas from the gas blowing holes 6 at the shaft part is started. In this way, the firing in front of tuyere is facilitated and the firing operation starting for the oxygen blast furnace 1 is smoothly executed.

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、特に酸素高炉の火入れ方法に関
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 a method for firing a blast furnace for iron-making, particularly an oxygen blast furnace.

(従来の技術) 現在、稼動している高炉の殆んどは、若干の酸素富化操
業を行なうことはあっても、羽口からの送風の主体は1
000〜1300℃の高温の空気であるから、操業開始
の際には高炉の炉底から羽目の近傍まで枕木もしくは木
材を積み重ねこの上にコークスのブランクチャージを行
ないその上に鉱石コークスを順次層別に装入し、火入れ
時には全く着火源の存在がなくても前述の高温熱風の送
風開始直後に枕木等に着火する。しかし、この高炉操業
の生産性をより向上せしめるかもしくは炉頂ガスの化学
工業用原料とする見地から酸素高炉の操業が提案される
ようになり、昨今の例では特開昭60−159104号
等がある。
(Conventional technology) Most of the blast furnaces currently in operation may perform some oxygen enrichment operation, but the main source of air blowing from the tuyere is
Since the air is at a high temperature of 000 to 1,300 degrees Celsius, at the start of operation, railroad ties or wood are piled up from the bottom of the blast furnace to the vicinity of the siding, and a blank charge of coke is applied on top of this, and ore coke is sequentially layered on top of this. Even if there is no ignition source at all during charging and burning, the railroad ties etc. are ignited immediately after the above-mentioned high-temperature hot air starts blowing. However, from the viewpoint of further improving the productivity of blast furnace operation or using the top gas as a raw material for chemical industry, the operation of oxygen blast furnaces has been proposed. There is.

通常酸素高炉の操業は、炉頂ガスが羽口先の温度調整剤
として若干使用されるとしても温度は150℃程度であ
り、送風の主体は常温の酸素であるから、着火源のない
限り送風を開始してもコークス、木材等の燃焼は始まら
ない。
Normally, in the operation of an oxygen blast furnace, the temperature is around 150℃, even though the top gas is used as a temperature regulating agent at the tip of the tuyere, and the main body of the blast is oxygen at room temperature. Even if the combustion starts, the combustion of coke, wood, etc. will not start.

又、酸素高炉の場合炉上部における熱不足を解決するた
めにシャフト部から予熱ガスを吹き込む必要があるが羽
目部の着火と予熱ガスの吹込みのタイミングに関する先
行技術はない。
Furthermore, in the case of an oxygen blast furnace, it is necessary to inject preheated gas from the shaft section in order to solve the heat shortage in the upper part of the furnace, but there is no prior art regarding the timing of ignition of the siding section and the injection of preheated gas.

(発明が解決しようとする問題点) 本発明は新しい製鉄法、酸素高炉の立ち上り時の簡単で
且つ確実な羽口前での着火法とシャフトからの予熱ガス
吹き込みのタイミングを提供することを目的とする。
(Problems to be Solved by the Invention) The purpose of the present invention is to provide a new iron manufacturing method, a simple and reliable ignition method in front of the tuyere at the start-up of an oxygen blast furnace, and the timing of preheating gas injection from the shaft. shall be.

「発明の構成」 (問題点を解決するための手段) 前項の目的を達成するために本発明者等は、羽口先に着
火源を挿入し酸素送風を開始すると共に、シャフト部か
ら予熱ガスの吹き込みを開始することを特徴とする酸素
高炉の火入れ方法。
"Structure of the Invention" (Means for Solving the Problems) In order to achieve the purpose of the previous section, the present inventors inserted an ignition source into the tip of the tuyere to start blowing oxygen, and at the same time introduced preheated gas from the shaft. A method for firing up an oxygen blast furnace characterized by starting blowing.

を伎に提案する。この方法を採用することにより簡単に
しかも確実に着火し順調な操業を開始することができる
Suggest to Ki. By adopting this method, it is possible to easily and reliably ignite the fire and start smooth operation.

(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。
(Function) In the present invention, an oxygen blast furnace refers to an oxygen concentration of 40% from the tuyere.
This is a blast furnace that operates by blowing the above gases at room temperature and by blowing preheated gas through a shaft.

高炉の場合、通常送風羽口は26〜38個あるがその全
羽口先に着火剤を挿入することはない。
In the case of a blast furnace, there are usually 26 to 38 blast tuyeres, but the ignition agent is not inserted into all of the tuyeres.

4〜8個の羽口の先きに着火源を挿入し、最初はそれ等
の羽口のみから酸素の吹き込みを開始すれば高濃度酸素
のため極めて短時間に羽口先の枕木、木材に着火する。
If you insert an ignition source at the tips of 4 to 8 tuyeres and start blowing oxygen only from those tuyeres, the high concentration of oxygen will quickly destroy the sleepers and wood at the tips of the tuyeres. ignite.

又、着火源としては赤熱コークス、赤熱木炭を羽口覗き
穴よりもしくは羽口の近傍から羽口先に挿入するか、羽
口覗き穴よりガス−空気のバーナーを羽口先まで差し込
み炉内羽口先に燃焼帯を形成せしめてもよい。何れにし
ても略等間隔に火点をつくり、羽口先が充分に明るくな
ったら、後は閉めである他の羽口のバルブを次第に開け
て全羽口から送風を開始すればよい。又、酸素高炉にお
いては前述したようにシャフトからの予熱ガスの吹き込
みを必要とするが、羽口部における着火、送風開始と略
同時にシャフトからの送風を開始しないと炉下部からの
ガスに隨搬されてくる装入粉粒物が予熱ガス吹き込みノ
ズルに詰りを生ずることがあること、炉内におけるガス
還元域を拡げる見地からも、羽口からの送風と呼応して
ガス吹き込みを開始する必要がある。
In addition, as an ignition source, red-hot coke or red-hot charcoal can be inserted into the tuyere tip through the tuyere peephole or near the tuyere, or a gas-air burner can be inserted from the tuyere peephole to the tuyere tip. A combustion zone may be formed. In any case, once the tuyere tips are sufficiently bright by creating spark points at approximately equal intervals, all that is required is to gradually open the valves of the other closed tuyeres and start blowing air from all the tuyeres. In addition, as mentioned above, in an oxygen blast furnace, it is necessary to blow preheated gas from the shaft, but if the air is not blown from the shaft almost simultaneously with the ignition at the tuyere and the start of air blowing, the gas from the lower part of the furnace may be blown into the oxygen blast furnace. The charged powder and granules may clog the preheating gas injection nozzle, and from the perspective of expanding the gas reduction area in the furnace, it is necessary to start gas injection in conjunction with the air blowing from the tuyeres. be.

(実施例) 羽口、全体で30本のうち、等間隔に5本に1本の割合
で合計6本の羽口の先端部に赤熱コークスを挿入し送風
バルブを開として全体で30ONor/akinの送風
を開始、着火をi認してがら残りの羽口のバルブを開き
ガス量を600 N rrr/n+inに増量した。一
方、シャフトからの予熱ガスの吹き込みは、羽口からの
送風開始と同時に30ONrrr/lll1nの予熱ガ
スの吹込みを開始順次増量していった。
(Example) Out of a total of 30 tuyeres, red hot coke was inserted into the tips of six tuyeres at equal intervals, one out of every five, and the blow valve was opened to generate a total of 30ONor/akin. After confirming ignition, the valves of the remaining tuyeres were opened and the gas amount was increased to 600 N rrr/n+in. On the other hand, the blowing of preheating gas from the shaft started at the same time as the start of air blowing from the tuyere, and the amount of preheating gas was increased sequentially.

第1図は本発明を実施する酸素高炉の代表的なフローの
概略図である。高炉1に炉頂がら装入物が装入される。
FIG. 1 is a schematic diagram of a typical flow of an oxygen blast furnace implementing the present invention. A charge is charged into the blast furnace 1 from the top of the furnace.

炉内ガスは炉頂ガス清浄機構2を経てガスホルダー3に
送られるが途中分岐されてブースター4を通り予熱ガス
発生装置5で高温のガスを生成しシャフトに設けたガス
吹込み口6がら炉内に吹き込まれる。又、一部はブース
ター4′を通って羽口先温度調整ガスとして、羽口9よ
り炉内に吹込まれる。一方、酸素源7がらは前記予熱ガ
ス発生装置5と羽口9へ酸素が送られるが、通常はコー
クスの代替の一部として微粉炭貯槽8からの微粉炭も併
せて羽口9から炉内に吹き込まれる。
The gas in the furnace is sent to the gas holder 3 via the furnace top gas cleaning mechanism 2, but it is branched on the way, passes through the booster 4, and generates high-temperature gas in the preheating gas generator 5. blown inside. A part of the gas passes through the booster 4' and is blown into the furnace from the tuyere 9 as a tuyere tip temperature adjusting gas. On the other hand, from the oxygen source 7, oxygen is sent to the preheating gas generator 5 and the tuyere 9, but normally pulverized coal from the pulverized coal storage tank 8 is also sent from the tuyere 9 into the furnace as part of coke replacement. is blown into.

第2図は酸素高炉の火入立上りの一例を示す。Figure 2 shows an example of the start-up of an oxygen blast furnace.

「発明の効果」 以上詳述したように本発明による場合には、酸素送風に
先立ち着火源を羽口先きに入れることにより着火を容易
にし、且つシャフトからの予熱ガスの吹き込みのタイミ
ングを羽口送風と略同時とすることにより、酸素高炉の
順調な火入立上りが可能となった。
"Effects of the Invention" As detailed above, according to the present invention, ignition is facilitated by introducing an ignition source into the tip of the tuyere prior to oxygen blowing, and the timing of blowing preheated gas from the shaft is adjusted. By starting the blast at almost the same time as the mouth blowing, it was possible to start the oxygen blast furnace smoothly.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の使用される酸素高炉の代表的なフロー
を示し、第2図は酸素高炉の火入れ立上りの1実施例を
示す。 1:高炉 2:炉頂ガス清浄機構 3:ガスホルダー 4ニブ−スター 4′ニブ−スター 5:予熱ガス発生装置 6:ガス吹込みロ ア:酸素源 8:微粉炭貯槽 9:羽口 炉1ガス清浄機講 隼 2IIl
FIG. 1 shows a typical flow of an oxygen blast furnace used in the present invention, and FIG. 2 shows an example of starting up of the oxygen blast furnace. 1: Blast furnace 2: Furnace top gas cleaning mechanism 3: Gas holder 4 Nib-star 4' Nib-star 5: Preheating gas generator 6: Gas injection lower: Oxygen source 8: Pulverized coal storage tank 9: Tuyere furnace 1 Gas Purifier Kohayabusa 2IIIl

Claims (1)

【特許請求の範囲】[Claims] 羽口先に着火源を挿入し酸素送風を開始すると共に、シ
ャフト部からの予熱ガスの吹き込みを開始することを特
徴とする酸素高炉の火入れ方法。
A method for firing an oxygen blast furnace, which comprises inserting an ignition source into the tip of the tuyere and starting oxygen blowing, and at the same time starting blowing preheated gas from the shaft.
JP185787A 1987-01-09 1987-01-09 Firing method for oxygen blast furnace Pending JPS63171810A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP185787A JPS63171810A (en) 1987-01-09 1987-01-09 Firing method for oxygen blast furnace
CN 88100068 CN1007431B (en) 1987-01-09 1988-01-09 Tuyere of blast furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP185787A JPS63171810A (en) 1987-01-09 1987-01-09 Firing method for oxygen blast furnace

Publications (1)

Publication Number Publication Date
JPS63171810A true JPS63171810A (en) 1988-07-15

Family

ID=11513211

Family Applications (1)

Application Number Title Priority Date Filing Date
JP185787A Pending JPS63171810A (en) 1987-01-09 1987-01-09 Firing method for oxygen blast furnace

Country Status (2)

Country Link
JP (1) JPS63171810A (en)
CN (1) CN1007431B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106032907A (en) * 2015-03-12 2016-10-19 宝山钢铁股份有限公司 A blast furnace gas burner ignition device and method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0576869B1 (en) * 1992-07-01 1998-11-11 Paul Wurth S.A. Apparatus for injecting pulverized coal into a blast furnace
KR970009084B1 (en) * 1994-12-29 1997-06-05 김만제 Apparatus for melting fine coals and method of melting the same using the apparatus
KR100803990B1 (en) * 2006-10-18 2008-02-15 주식회사 포스코 Tuvere tuyere of melter-gasifier
CN116516088A (en) * 2023-04-11 2023-08-01 新疆八一钢铁股份有限公司 Tuyere device of hydrogen-rich carbon circulating oxygen blast furnace

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106032907A (en) * 2015-03-12 2016-10-19 宝山钢铁股份有限公司 A blast furnace gas burner ignition device and method
CN106032907B (en) * 2015-03-12 2018-06-29 宝山钢铁股份有限公司 Blast furnace gas burner igniter

Also Published As

Publication number Publication date
CN1007431B (en) 1990-04-04
CN88100068A (en) 1988-08-24

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