JPS62192509A - Method for blowing pulverized carbon into blast furnace - Google Patents
Method for blowing pulverized carbon into blast furnaceInfo
- Publication number
- JPS62192509A JPS62192509A JP3344186A JP3344186A JPS62192509A JP S62192509 A JPS62192509 A JP S62192509A JP 3344186 A JP3344186 A JP 3344186A JP 3344186 A JP3344186 A JP 3344186A JP S62192509 A JPS62192509 A JP S62192509A
- Authority
- JP
- Japan
- Prior art keywords
- pulverized coal
- lance
- oxygen
- tuyere
- blowing
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims description 13
- 238000007664 blowing Methods 0.000 title abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title 1
- 229910052799 carbon Inorganic materials 0.000 title 1
- 239000003245 coal Substances 0.000 claims abstract description 56
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 19
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 19
- 239000001301 oxygen Substances 0.000 claims abstract description 19
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 17
- 239000000446 fuel Substances 0.000 abstract description 6
- 239000012530 fluid Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- 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、高炉操業において、燃料費低減、炉況制御を
目的として、その送風羽口から微粉炭を吹込む技術の改
良に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in the technique of blowing pulverized coal through the blast tuyeres in blast furnace operation for the purpose of reducing fuel costs and controlling furnace conditions.
（従来の技術）
近時高炉ではオールコークス操業に代り燃料費低減、炉
況制御を目的としてその送風羽口から微粉炭を吹込むこ
とが行なわれている。(Prior Art) In recent years, instead of all-coke operation in blast furnaces, pulverized coal has been injected through the blast tuyeres for the purpose of reducing fuel costs and controlling furnace conditions.
類似の技術としては下記文献に記載がある。Similar techniques are described in the following documents.
（ｉ） 鉄と鋼、第５８年（１９７２）Ａ５、第５５
９〜５６５頁及び第６００〜６０７頁。(i) Tetsu to Hagane, No. 58 (1972) A5, No. 55
Pages 9-565 and 600-607.
（１Ｇ 鉄鋼協会６９回講演会論文集、第６２５〜６
２７頁０
（面 鉄と鋼、５４（１９６９） １０、第３５５，３
５６頁。(1G Proceedings of the 69th Annual Meeting of the Iron and Steel Institute of Japan, No. 625-6
27 page 0 (Tetsu to Hagane, 54 (1969) 10, No. 355, 3
56 pages.
（発明が解決しようとする問題点）
従来の高炉の微粉炭吹込みにおいては、微粉炭着火温度
と燃焼率との関係については考慮されているが、着火温
度の制御方法は送風温度の変更によっている。その一方
で高炉状況変動に対して風温アクションがとられるため
、従来技術の方法では微粉炭燃焼に適した１１００℃以
上の温度に常時維持できるわけではない。(Problems to be Solved by the Invention) In conventional pulverized coal injection into blast furnaces, the relationship between pulverized coal ignition temperature and combustion rate is taken into consideration, but the ignition temperature control method is based on changing the blowing temperature. There is. On the other hand, since wind temperature actions are taken in response to changes in blast furnace conditions, conventional methods cannot always maintain a temperature of 1100° C. or higher, which is suitable for pulverized coal combustion.
ソノ他、ランス先端形状については、粉炭流がブローパ
イプ内に拡散しないようにされているが、燃焼媒体であ
る酸素と微粉体との混合性は考慮されておらず、現状で
は微粉炭流中心域では酸素濃度はかなり低くて燃焼しに
くい状況にるると考えられる。The shape of the tip of the lance is designed to prevent the pulverized coal flow from dispersing into the blow pipe, but the miscibility of oxygen, which is a combustion medium, with the fine powder is not taken into account, and currently the pulverized coal flow is centered. It is thought that the oxygen concentration in the area is quite low, making it difficult for combustion to occur.
（問題点を解決するだめの手段、作用、実施例）本発明
は、従来技術の上記問題点に解決を与え、微粉炭の吹込
量を大幅に増加させることを可能として、さらなる燃料
費の低減を実現するため、温度上昇により微粉炭の着火
を促進し、また微粉炭のレースウェイ内滞留時間が長く
なるようにすることによりレースウェイ内で燃焼率を上
昇させる方法をとる。そのために、２以上の微粉炭吹込
み用ランスをブローパイプに挿入し、羽口より遠方の前
段ランスからは小量の微粉炭と酸素とを吹込むことによ
り羽口に近い後段ランスで多量に吹込まれる微粉炭の着
火温度を制御する。(Means for solving the problems, effects, and embodiments) The present invention solves the above-mentioned problems of the prior art, makes it possible to significantly increase the amount of pulverized coal injected, and further reduces fuel costs. In order to achieve this, a method is used to increase the combustion rate within the raceway by promoting ignition of the pulverized coal by increasing the temperature and increasing the residence time of the pulverized coal within the raceway. For this purpose, two or more pulverized coal injection lances are inserted into the blow pipe, and a small amount of pulverized coal and oxygen are injected from the front lance far from the tuyere, and a large amount is injected by the rear lance near the tuyere. Controls the ignition temperature of the injected pulverized coal.
また微粉炭吹込み用ランスの先端には風車等を設けて、
それにより旋回流を起させることによって、レースウェ
イ内微粉炭滞留時間を長くするとともに酸素との混合の
促進を図る。さらに、レースウェイ内での微粉炭の未燃
焼残′分のチャー （ｃｈａｒ ） の燃焼促進を図
るべく、羽目近傍に酸素を吹込み燃焼率をざらに上昇き
せる。In addition, a windmill etc. is installed at the tip of the lance for pulverized coal injection,
By causing a swirling flow, the residence time of the pulverized coal in the raceway is lengthened, and mixing with oxygen is promoted. Furthermore, in order to promote the combustion of the unburned char of the pulverized coal in the raceway, oxygen is blown into the vicinity of the siding to roughly increase the combustion rate.
すなわち、本発明の高炉の微粉炭吹込み方法は、基本的
には、高炉の送風羽口につづくブローパイプに２つ以上
の微粉炭吹込み用ランスを挿入し、羽口より遠方のラン
スから少量の微粉炭と酸素とを吹込み、羽口に近い後段
ランスから多量の微粉炭を吹込むことを特徴とするもの
である。That is, the method of injecting pulverized coal into a blast furnace of the present invention basically involves inserting two or more lances for pulverized coal injection into a blow pipe connected to the blast tuyere of the blast furnace, and injecting pulverized coal from a lance far from the tuyere. It is characterized by injecting a small amount of pulverized coal and oxygen, and injecting a large amount of pulverized coal from a rear lance near the tuyere.
以下、本発明方法を添付図を参照し、実施例により具体
的に説明する。Hereinafter, the method of the present invention will be explained in detail by way of examples with reference to the accompanying drawings.
第１図は、送風羽口（１）につづくブローパイプ（２）
におけるこの例では２つの微粉炭吹込み用ランス（３）
および（４）の取付位置を示す。これラバイブ（３）
１４）は、第２図に示すように、２Ｎ管構造で微粉炭は
中心通路（５）を通り、また酸氷または空気は外側環状
通路（６）を通シ先端から吹込まれる。Figure 1 shows the blow pipe (2) following the blow tuyere (1).
In this example, two pulverized coal injection lances (3)
and (4) mounting positions are shown. This is Love Live (3)
14) has a 2N tube structure as shown in FIG. 2, and pulverized coal passes through the central passage (5), and acid ice or air is blown from the tip through the outer annular passage (6).
これらランスの酸素または空気の通気路（６）の先端に
は風車（７）等の風向偏向手段が取付けられ、ランスを
出た瞬間に微粉炭と燃焼空気または酸素は混合され風車
により旋回流化される。A wind direction deflecting means such as a windmill (7) is attached to the tip of the oxygen or air ventilation path (6) of these lances, and the moment the pulverized coal leaves the lance, the pulverized coal and combustion air or oxygen are mixed and turned into a swirling flow by the windmill. be done.
本発明方法では羽口（１）より遠方のランス（３）から
は少量の微粉炭と酸素とが吹込まれ、羽口（１）に近い
後段ランス【４）から多量の微粉炭が吹込まれ、この多
量の微粉炭のための着火温度を制御する。このためラン
ス（３）からの微粉炭吹込み量はランス（４）位置での
雰囲気温度が微粉炭の着火に適した１１００℃以上とな
り、従って多量の微粉炭の着火が促進されるように調整
される。In the method of the present invention, a small amount of pulverized coal and oxygen are injected from the lance (3) that is far from the tuyere (1), and a large amount of pulverized coal is injected from the rear lance [4] that is close to the tuyere (1). Control the ignition temperature for this large amount of pulverized coal. Therefore, the amount of pulverized coal injected from the lance (3) is adjusted so that the atmospheric temperature at the lance (4) position is 1100°C or higher, which is suitable for igniting pulverized coal, and therefore the ignition of a large amount of pulverized coal is promoted. be done.
また後段ランス（４）より羽口（１）寄りに酸素または
空気のみの吹込用のランス（８）を設け、レースウェイ
内でのチャーの燃焼を促進する。Further, a lance (8) for blowing only oxygen or air is provided closer to the tuyere (1) than the rear lance (4) to promote combustion of char within the raceway.
Ｍ３図は上方にランス（３） （４） （８）の位置を
示し、下方に対応する距離を横軸にとり使用ランスをパ
ラメータとして縦軸に軸方向昌度分布を示す。The M3 diagram shows the positions of the lances (3), (4), and (8) on the upper side, the horizontal axis represents the distance corresponding to the lower side, and the axial power distribution is shown on the vertical axis with the used lance as a parameter.
温度分布においてランス（３）から少量の微粉炭が吹込
まれることにより、ランス（４）位置での雰囲気温度が
１１００℃に上昇し、ランス（４）からの多量の微粉炭
が燃焼し易い条件となっていることが知られる。またで
らにランス（８）から酸°素を吹込むことＫよりランス
（４）後の温度が上昇することが知られる。これは散索
吹込みにより微粉炭の燃焼がさらに促進されることを示
す。In the temperature distribution, by injecting a small amount of pulverized coal from lance (3), the atmospheric temperature at the lance (4) position rises to 1100°C, a condition where a large amount of pulverized coal from lance (4) is easy to burn. It is known that It is also known that by additionally blowing oxygen from the lance (8), the temperature after the lance (4) increases. This indicates that the combustion of pulverized coal is further promoted by blowing.
また第４図は横軸にバーナからの距離をとり使用ランス
をパラメータとして縦軸に燃焼率をとって示す。＝ンス
［３） ＋４） （８）を併用した場合にレースウェイ
境界での燃焼率が最も大きく、従来技術のランス（４）
のみ使用の場合に較べて燃焼率が約１０％上昇する。Further, in FIG. 4, the horizontal axis represents the distance from the burner, the lance used is used as a parameter, and the vertical axis represents the combustion rate. = Lance [3) +4) When (8) is used in combination, the combustion rate at the raceway boundary is the highest, compared to the conventional technology Lance (4).
The combustion rate increases by about 10% compared to when only the fuel is used.
（発明の効果）
本発明方法によると高炉レースウェイ内での微粉炭燃焼
率は従来技術に較べて約１０％上昇し、その限界微粉炭
吹込み量が８０ ｋｑ／ｌ−ｐである高炉においてその
量は１２０ ＃／ｌ−ｐまで増加でき、燃料費低減の効
果が得られる。(Effects of the Invention) According to the method of the present invention, the combustion rate of pulverized coal in the blast furnace raceway increases by about 10% compared to the conventional technology, and in a blast furnace where the limit pulverized coal injection amount is 80 kq/l-p. The amount can be increased up to 120 #/l-p, resulting in the effect of reducing fuel costs.
第１図は本発明方法によるランスの取付位置を示す図、
第２図（イ）は微粉炭吹込み用ランスの先端の縦断側面
図、第２図（ロ）はその端部口、第６図は軸方向温度外
イ「とランス位置、使用ランスとの関°係を示す図表、
第４図は燃焼率とランス位置、使用ランスとの関係を示
す図表である。
（１）・−送風羽口、（２）拳・ブローパイプ、（３）
（４）・・微粉炭吹込み用ランス、（５）・・中心通
路、（６）・・外側環状通路、（７）・・風車、（８）
ζ拳ランスＯFIG. 1 is a diagram showing the mounting position of the lance according to the method of the present invention;
Figure 2 (a) is a longitudinal cross-sectional side view of the tip of the lance for pulverized coal injection, Figure 2 (b) is the end opening, and Figure 6 is the axial temperature difference (a), the lance position, and the lance used. Diagrams showing relationships;
FIG. 4 is a chart showing the relationship between combustion rate, lance position, and lance used. (1)・-Blow tuyere, (2) fist/blow pipe, (3)
(4)... Lance for pulverized coal injection, (5)... Center passage, (6)... Outer annular passage, (7)... Wind turbine, (8)
Zeta fist lance O
Claims (3)
の微粉炭吹込みランスを挿入し、羽口より遠方のランス
から少量の微粉炭と酸素とを吹込み、羽口に近い後段ラ
ンスから多量の微粉炭を吹込むことを特徴とする高炉の
微粉炭吹込み方法。(1) Insert two or more pulverized coal injection lances into the blowpipe leading to the blast tuyeres of the blast furnace, inject a small amount of pulverized coal and oxygen from the lances farther from the tuyere, and then blow in a small amount of pulverized coal and oxygen from the lances located further away from the tuyeres, and then A method for injecting pulverized coal into a blast furnace, which is characterized by injecting a large amount of pulverized coal into a blast furnace.
偏向手段を設け吹込微粉炭および酸素の旋回流を与える
ようにした特許請求の範囲第１項記載の高炉の微粉炭吹
込み方法。(2) Pulverized coal injection in a blast furnace according to claim 1, wherein a wind direction deflection means such as a windmill is provided at the tip of the air passage of the lance for pulverized powder injection to provide a swirling flow of the blown pulverized coal and oxygen. Method.
う特許請求の範囲第１項記載の高炉の微粉炭吹込み方法
。(3) The method for injecting pulverized coal into a blast furnace according to claim 1, wherein oxygen is injected closer to the tuyere than the rear lance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3344186A JPS62192509A (en) | 1986-02-17 | 1986-02-17 | Method for blowing pulverized carbon into blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3344186A JPS62192509A (en) | 1986-02-17 | 1986-02-17 | Method for blowing pulverized carbon into blast furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62192509A true JPS62192509A (en) | 1987-08-24 |
| JPH0582446B2 JPH0582446B2 (en) | 1993-11-19 |
Family
ID=12386618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3344186A Granted JPS62192509A (en) | 1986-02-17 | 1986-02-17 | Method for blowing pulverized carbon into blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62192509A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0367745A2 (en) * | 1988-10-31 | 1990-05-09 | CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif | Method of injecting an auxiliary fuel into a blast furnace |
| WO1991014791A1 (en) * | 1990-03-20 | 1991-10-03 | Küttner Gmbh & Co. Kg | Process and device for injecting coal dust and oxygen into a blast furnace |
| JPH03240908A (en) * | 1990-02-16 | 1991-10-28 | Kobe Steel Ltd | Method for blowing powdered fuel into blast furnace |
| FR2681417A1 (en) * | 1991-09-17 | 1993-03-19 | Air Liquide | Device and process for injecting gas and coal into a furnace for melting metal |
| JPH05125412A (en) * | 1991-11-05 | 1993-05-21 | Kawasaki Steel Corp | Method for injecting powdery and granular materials from tuyere in vertical type furnace |
| KR100388233B1 (en) * | 2000-12-20 | 2003-06-19 | 주식회사 포스코 | Furnace center coke heat-increasing method after repairing furnace wall |
| LU91691B1 (en) * | 2010-05-26 | 2011-11-28 | Wurth Paul Sa | Tuyere stock arrangement of a blast furnace |
| JP2012224932A (en) * | 2011-04-22 | 2012-11-15 | Jfe Steel Corp | Method for blowing pulverized coal into blast furnace and equipment therefor |
| WO2013094230A1 (en) * | 2011-12-21 | 2013-06-27 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| JP2016160484A (en) * | 2015-03-02 | 2016-09-05 | Ｊｆｅスチール株式会社 | Method for operating blast furnace |
-
1986
- 1986-02-17 JP JP3344186A patent/JPS62192509A/en active Granted
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0367745A2 (en) * | 1988-10-31 | 1990-05-09 | CENTRE DE RECHERCHES METALLURGIQUES CENTRUM VOOR RESEARCH IN DE METALLURGIE Association sans but lucratif | Method of injecting an auxiliary fuel into a blast furnace |
| JPH03240908A (en) * | 1990-02-16 | 1991-10-28 | Kobe Steel Ltd | Method for blowing powdered fuel into blast furnace |
| WO1991014791A1 (en) * | 1990-03-20 | 1991-10-03 | Küttner Gmbh & Co. Kg | Process and device for injecting coal dust and oxygen into a blast furnace |
| FR2681417A1 (en) * | 1991-09-17 | 1993-03-19 | Air Liquide | Device and process for injecting gas and coal into a furnace for melting metal |
| JPH05125412A (en) * | 1991-11-05 | 1993-05-21 | Kawasaki Steel Corp | Method for injecting powdery and granular materials from tuyere in vertical type furnace |
| KR100388233B1 (en) * | 2000-12-20 | 2003-06-19 | 주식회사 포스코 | Furnace center coke heat-increasing method after repairing furnace wall |
| JP2013531732A (en) * | 2010-05-26 | 2013-08-08 | ポール ヴルス エス．エイ． | Tuyere equipment for blast furnace |
| US8980165B2 (en) | 2010-05-26 | 2015-03-17 | Paul Wurth S.A. | Tuyere stock arrangement of a blast furnace |
| WO2011147781A1 (en) * | 2010-05-26 | 2011-12-01 | Paul Wurth S.A. | Tuyere stock arrangement of a blast furnace |
| LU91691B1 (en) * | 2010-05-26 | 2011-11-28 | Wurth Paul Sa | Tuyere stock arrangement of a blast furnace |
| AU2011257307B2 (en) * | 2010-05-26 | 2014-09-18 | Paul Wurth S.A. | Tuyere stock arrangement of a blast furnace |
| JP2012224932A (en) * | 2011-04-22 | 2012-11-15 | Jfe Steel Corp | Method for blowing pulverized coal into blast furnace and equipment therefor |
| AU2012355194B2 (en) * | 2011-12-21 | 2015-09-03 | Jfe Steel Corporation | Blast furnace operation method |
| WO2013094230A1 (en) * | 2011-12-21 | 2013-06-27 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| JP2016160484A (en) * | 2015-03-02 | 2016-09-05 | Ｊｆｅスチール株式会社 | Method for operating blast furnace |
| WO2016139913A1 (en) * | 2015-03-02 | 2016-09-09 | Ｊｆｅスチール株式会社 | Blast furnace operating method |
| KR20170107569A (en) * | 2015-03-02 | 2017-09-25 | 제이에프이 스틸 가부시키가이샤 | Blast furnace operating method |
| CN107406895A (en) * | 2015-03-02 | 2017-11-28 | 杰富意钢铁株式会社 | Method for operating blast furnace |
| AU2016227284B2 (en) * | 2015-03-02 | 2019-03-28 | Jfe Steel Corporation | Method for Operating Blast Furnace |
| RU2695793C2 (en) * | 2015-03-02 | 2019-07-26 | ДжФЕ СТИЛ КОРПОРЕЙШН | Blast furnace operation method |
| CN107406895B (en) * | 2015-03-02 | 2019-11-19 | 杰富意钢铁株式会社 | Method for operating blast furnace |
| US10487370B2 (en) | 2015-03-02 | 2019-11-26 | Jfe Steel Corporation | Method for operating blast furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0582446B2 (en) | 1993-11-19 |
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