JPH05125412A - Method for injecting powdery and granular materials from tuyere in vertical type furnace - Google Patents
Method for injecting powdery and granular materials from tuyere in vertical type furnaceInfo
- Publication number
- JPH05125412A JPH05125412A JP28861791A JP28861791A JPH05125412A JP H05125412 A JPH05125412 A JP H05125412A JP 28861791 A JP28861791 A JP 28861791A JP 28861791 A JP28861791 A JP 28861791A JP H05125412 A JPH05125412 A JP H05125412A
- Authority
- JP
- Japan
- Prior art keywords
- tuyere
- powdery
- powder
- injecting
- granular materials
- 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
Landscapes
- Manufacture Of Iron (AREA)
- Blast Furnaces (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は高炉あるいは多段羽口を
有する溶融還元炉などの竪型炉の羽口粉粒体吹込方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for injecting tuyere powder particles in a vertical furnace such as a blast furnace or a smelting reduction furnace having multi-stage tuyere.
【０００２】[0002]
【従来の技術】近年、高炉操業においては、安価な原燃
料の利用による銑鉄コストの低減や溶銑成分の制御を目
的として高炉羽口からの粉粒体吹込操業が実施されてい
る。また竪型のコークス充填層炉を用いたいわゆる溶融
還元炉の操業においても、原料として粉状の鉄鉱石もし
くはその他の金属酸化物粉を羽口から吹込むのが一般的
である。竪型炉の羽口への粉粒体吹込は、図２に示すよ
うに、羽口１１に連接されたブローパイプ９から各羽口
につき１本の粉粒体吹込ランス１３を挿入して行うのが
一般的である。また粉粒体の多量吹込を実現するため
に、羽口を上下２段に配置し、上段羽口と下段羽口との
両方から粉粒体を吹込む方法（特開平３−３９４０７号
公報）や、各羽口に粉粒体吹込ランスを２本配設する方
法が提案されている。2. Description of the Related Art In recent years, in the operation of a blast furnace, an operation of blowing powder particles from the tuyere of a blast furnace has been carried out for the purpose of reducing the cost of pig iron by using inexpensive raw fuel and controlling the hot metal component. Further, also in the operation of a so-called smelting reduction furnace using a vertical type coke packed bed furnace, it is common to blow powdery iron ore or other metal oxide powder as a raw material from the tuyere. As shown in FIG. 2, blowing of the granular material into the tuyere of the vertical furnace is performed by inserting one granular material blowing lance 13 for each tuyere from the blow pipe 9 connected to the tuyere 11. Is common. Further, in order to realize a large amount of powder and granular material to be blown, the tuyere is arranged in upper and lower two stages, and the powder and granular material is blown from both the upper and lower tuyeres (Japanese Patent Laid-Open No. 3-39407). Alternatively, a method of arranging two powder and particle blowing lances at each tuyere has been proposed.
【０００３】一方、迅速な炉調整のために粉粒体吹込ラ
ンスを二重管とし、一方の管から酸素を他方の管からは
炭材を同時に吹込む方法がある。（特開昭５９−２８１
０９３号公報）。また、操業条件によっては吹込まれた
粉粒体の一部が未溶解となり、羽口先等に付着成長する
ことがあるため、この付着物の除去装置（実開平３−１
４１３８号公報）を装備する場合もある。On the other hand, there is a method in which a powder-and-particles blowing lance is a double pipe for rapid furnace adjustment, and oxygen is blown from one pipe and carbonaceous material is blown from the other pipe at the same time. (JP-A-59-281
093). Further, depending on the operating conditions, a part of the blown powder particles may become unmelted and may adhere to and grow on the tuyere tip.
4138).
【０００４】[0004]
【発明が解決しようとする課題】粉粒体吹込ランス１本
あたりの粉粒体吹込量が増加した場合、あるいは熱風の
量や温度の変動（低下）が生じた場合などに、吹込まれ
た粉粒体の一部が未溶解となり、粉粒体吹込ランスの周
囲あるいは羽口先に未溶解の粉粒体が付着、成長するこ
とがあり、甚しい場合には粉粒体の吹込を中断せざるを
得なくなることがあった。[Problems to be Solved by the Invention] When the amount of powder or granular material blown per lance of powder or granular material increases, or when the amount or temperature of hot air or the temperature fluctuates (decreases), etc. Part of the granules may become undissolved, and undissolved granules may adhere to and grow around the lance or the tuyere of the granules blowing lance.In severe cases, blowing of granules must be interrupted. Sometimes I couldn't get it.
【０００５】これを解決するために、羽口先の付着物を
機械的に除去する技術が実開平３−１４１３８号公報に
開示されているが、装置化が必要である上に、粉粒体の
吹込を１時的に中断した上で付着物を除去しなければな
らないという問題があった。一方、機械によらない付着
物の除去方法として、２重管ランスを用いて一方の管か
ら酸素を他方の管から粉粒体を吹込むことを利用するこ
ともできるが、粉粒体吹込ランスの構造が複雑となる
上、ランスの重量が重くなり、取扱いにくいという問題
があった。In order to solve this, a technique for mechanically removing the deposits on the tuyere is disclosed in Japanese Utility Model Laid-Open Publication No. 3-14138. There was a problem that the adhering matter had to be removed after the blowing was temporarily stopped. On the other hand, as a method of removing deposits without using a machine, it is also possible to use a double pipe lance to blow oxygen from one pipe and a powder or granule from the other pipe. In addition to the complicated structure, the lance is heavy and difficult to handle.
【０００６】本発明は、これらの問題点を解決した羽口
粉粒体吹込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 blowing tuyere powder and granules which solves these problems.
【０００７】[0007]
【課題を解決するための手段】本発明は、竪型炉の羽口
に羽口１個につきそれぞれ２本の粉粒体吹込ランスを配
設し、一方の粉粒体吹込ランスから酸化鉄粉又は微粉炭
を吹込みながら、他方の粉粒体吹込ランスから支燃性ガ
スを供給することを特徴とする竪型炉の羽口粉粒体吹込
方法である。この場合、他方の粉粒体吹込ランスから支
燃性ガスと粉粒体とを定期的に交互に切替えて供給する
こととすれば好適である。According to the present invention, two powder and granular material injection lances are provided for each tuyere at the tuyere of a vertical furnace, and iron oxide powder is supplied from one powder and granular material injection lance. Alternatively, the method for injecting tuyere powder particles in a vertical furnace is characterized in that, while blowing pulverized coal, the combustion supporting gas is supplied from the other powder particle injection lance. In this case, it is preferable that the combustion-supporting gas and the granular material are periodically switched alternately and supplied from the other granular material blowing lance.
【０００８】ここで竪型炉としては、高炉あるいは多段
羽口を有する溶融還元炉等を指称する。また酸化鉄粉と
しては酸化鉄分を含む粉粒体、例えば鉄鉱石粉や、高
炉、転炉、圧延工程で発生したダストなどを指してい
る。また支撚性ガスとは酸素、酸素富化空気などをい
う。Here, the vertical furnace refers to a blast furnace or a smelting reduction furnace having multi-stage tuyeres. Further, the iron oxide powder refers to a granular material containing iron oxide, such as iron ore powder, dust generated in a blast furnace, a converter, or a rolling process. The twisting gas is oxygen, oxygen-enriched air, or the like.
【０００９】[0009]
【作用】本発明によれば、羽口にそれぞれ粉粒体吹込ラ
ンスを２本配設し、一方のランスから粉粒体を吹込みな
がら他方のランスから酸素等の支燃性ガスを供給するよ
うにしたので、粉粒体の吹込みを中断することなく支燃
性ガスによって容易に羽口先に付着した粉粒体の付着物
を除去することができる。According to the present invention, two powder and granular material injection lances are provided at each tuyere, and while the powder and granular material is injected from one lance, a combustion supporting gas such as oxygen is supplied from the other lance. With this configuration, it is possible to easily remove the deposits of the powder and granules adhering to the tuyere by the combustion supporting gas without interrupting the blowing of the powder and granules.
【００１０】[0010]
【実施例】図３は本発明による２段羽口を有する溶融還
元炉における羽口粉粒体吹込方法を示すブロック図であ
る。酸化鉄粉は酸化鉄粉貯槽１に貯蔵された後、計量ホ
ッパ３に投入され、フラックスはフラックス貯槽２に貯
蔵された後、同様に計量ホッパ３に投入される。計量ホ
ッパ３では酸化鉄粉とフラックスの各々を秤量した後、
混合用ガス４で２種の原料を混合する。この混合物は吹
込タンク５に導入される。EXAMPLE FIG. 3 is a block diagram showing a method for injecting tuyere powder particles in a smelting reduction furnace having a two-stage tuyere according to the present invention. The iron oxide powder is stored in the iron oxide powder storage tank 1 and then charged into the weighing hopper 3, and the flux is stored in the flux storage tank 2 and then similarly charged into the weighing hopper 3. In the weighing hopper 3, after weighing each of the iron oxide powder and the flux,
Two kinds of raw materials are mixed with the mixing gas 4. This mixture is introduced into the blowing tank 5.
【００１１】吹込タンク５では図示しない配管によりタ
ンク内を加圧して、吹込タンク５内の粉粒体を流動化す
る。流動化された粉粒体はキャリアガス６、７により吹
込タンク５内から送出される。キャリアガス６、７によ
り輸送された酸化鉄粉とフラックスとの混合粉は、粉粒
体吹込ランス１３ａ、１３ｂから羽口１１内に噴出し、
上段ブローパイプ９と上段羽口１１内を通過する熱風と
共に上段羽口１１より溶融還元炉１４内に吹込まれる。
ここで熱風は加熱した空気又は加熱した酸素富化空気で
ある。また酸素８を供給する配管がキャリアガス６、７
の配管に結合されている。In the blowing tank 5, the inside of the blowing tank 5 is pressurized by a pipe (not shown) to fluidize the powder particles in the blowing tank 5. The fluidized powder or granules are delivered from the blow tank 5 by the carrier gases 6 and 7. The mixed powder of iron oxide powder and flux transported by the carrier gases 6 and 7 is jetted into the tuyere 11 from the granular material blowing lances 13a and 13b,
The hot air passing through the upper blow pipe 9 and the upper tuyeres 11 is blown into the smelting reduction furnace 14 from the upper tuyeres 11.
The hot air here is heated air or heated oxygen-enriched air. The pipes for supplying oxygen 8 are carrier gases 6, 7
Is connected to the pipe.
【００１２】本実施例では、図１に示すように、内径２
５ｍｍの粉粒体吹込ランス１３ａ、１３ｂを上段羽口１
１にそれぞれ２本配設して通常は両方のランスから粉粒
体を吹込み、羽口前レースウェイ１５内にて溶融させて
いる。粉粒体吹込中に上段羽口での吹込状況を監視し、
付着物１７が生成した時には、一方のランス１３ａから
の粉粒体の供給を停止すると同時にキャリアガス６を停
止し、支燃性ガスである酸素８を供給した。このとき、
他方のランス１３ｂの粉粒体吹込は継続した。この結
果、付着物１７及び吹込粉粒体１６の溶融が促進され、
付着物１７が除去されるのが確認された。また、定期的
に粉粒体吹込と酸素供給を切替えることにより、付着物
１７の生成を防止することができる。In this embodiment, as shown in FIG.
Install the 5 mm powder blasting lances 13a and 13b into the upper tuyeres 1.
Two of them are arranged in each of the Nos. 1 and powder particles are usually blown from both lances and melted in the front tuyere raceway 15. Monitor the blowing condition at the upper tuyeres while blowing powder,
When the deposit 17 was generated, the supply of the powdery particles from the one lance 13a was stopped, the carrier gas 6 was stopped at the same time, and the oxygen 8 as the combustion supporting gas was supplied. At this time,
Blowing of the granular material into the other lance 13b continued. As a result, melting of the deposit 17 and the blown powder granules 16 is promoted,
It was confirmed that the deposit 17 was removed. In addition, the generation of the adhering matter 17 can be prevented by periodically switching the blowing of the granular material and the supply of oxygen.
【００１３】[0013]
【発明の効果】本発明では、羽口にそれぞれ２本配設し
た粉粒体吹込ランスの一方から粉粒体を吹込みながら、
他方から酸素等の支燃性ガスを供給するようにしたの
で、未溶解の粉粒体による付着物を粉粒体吹込を停止す
ることなく容易に除去することができるようになった。According to the present invention, while injecting the powder and granular material from one of the powder and granular material injection lances provided at each of two tuyere,
Since the combustion-supporting gas such as oxygen is supplied from the other side, it becomes possible to easily remove the deposits due to the undissolved powdery particles without stopping the injection of the powdery particles.
【００１４】また、粉粒体吹込と酸素供給とを定期的に
切替えることにより、粉粒体の溶解が促進され、付着物
の生成を防止できるだけでなく、粉粒体の多量吹込もで
きるようになる。Further, by periodically switching between the blowing of the powder and the supply of oxygen, the dissolution of the powder can be promoted, not only the formation of deposits can be prevented, but also a large amount of the powder can be blown. Become.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明方法の実施に用いる２本の粉粒体吹込ラ
ンスを配設した羽口の断面図である。FIG. 1 is a cross-sectional view of a tuyere provided with two powder-particle blowing lances used for carrying out the method of the present invention.
【図２】従来の一般的羽口粉粒体吹込を示す図である。FIG. 2 is a view showing a conventional general tuyere powder and granule injection.
【図３】本発明の実施例に用いた粉粒体吹込ブロック図
である。FIG. 3 is a block diagram of a powdery or granular material used in the embodiment of the present invention.
１ 酸化鉄粉貯槽 ２ フラックス貯槽 ３ 計量ホッパ ４ 混合用ガス ５ 吹込タンク ６、７ キャリアガス ８ 酸素 ９ 上段ブローパイプ １０ 下段ブローパイプ １１ 上段羽口 １２ 下段羽口 １３ 粉粒体吹込ランス １４ 溶融還元炉 １５ レースウェイ １６ 粉粒体 １７ 付着物 1 Iron oxide powder storage tank 2 Flux storage tank 3 Measuring hopper 4 Mixing gas 5 Blow tank 6, 7 Carrier gas 8 Oxygen 9 Upper blow pipe 10 Lower blow pipe 11 Upper tuyere 12 Lower tuyere 13 Powder injection lance 14 Melt reduction Furnace 15 Raceway 16 Granules 17 Adhesion
───────────────────────────────────────────────────── フロントページの続き (72)発明者 渡辺 洋一 千葉市川崎町１番地 川崎製鉄株式会社千 葉製鉄所内 (72)発明者 児子 精祐 千葉市川崎町１番地 川崎製鉄株式会社千 葉製鉄所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoichi Watanabe 1 Kawasaki-cho, Chiba City Inside the Kawasaki Steel Co., Ltd. Chiba Steel Works (72) Inventor Seisuke Kouko 1 Kawasaki-machi, Chiba City Inside the Chiba Steel Works Co., Ltd.
Claims (2)
粒体吹込ランスを配設し、一方の粉粒体吹込ランスから
酸化鉄粉又は微粉炭を吹込みながら、他方の粉粒体吹込
ランスから支燃性ガスを供給することを特徴とする竪型
炉の羽口粉粒体吹込方法。1. A vertical furnace tuyere is provided with two powder and granule blowing lances per tuyere, and iron oxide powder or pulverized coal is blown from one powder and granule blowing lance while the other is being blown. A method for injecting tuyere powders and granules in a vertical furnace, characterized in that a combustion-supporting gas is supplied from the powder and granules injection lance.
と粉粒体とを定期的に交互に切替えて供給することを特
徴とする請求項１記載の竪型炉の羽口粉粒体吹込方法。2. The tuyere powder particles of a vertical furnace according to claim 1, wherein the combustion-supporting gas and the powder particles are periodically switched alternately from the other powder particle blowing lance and supplied. Body blowing method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3288617A JP2868941B2 (en) | 1991-11-05 | 1991-11-05 | Tuyere powder injection method for vertical furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3288617A JP2868941B2 (en) | 1991-11-05 | 1991-11-05 | Tuyere powder injection method for vertical furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05125412A true JPH05125412A (en) | 1993-05-21 |
| JP2868941B2 JP2868941B2 (en) | 1999-03-10 |
Family
ID=17732521
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3288617A Expired - Fee Related JP2868941B2 (en) | 1991-11-05 | 1991-11-05 | Tuyere powder injection method for vertical furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2868941B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8535410B1 (en) * | 2012-04-24 | 2013-09-17 | John D. Lynn | Blast furnace cooling method to increase steel production and reduce cost in a basic oxygen furnace |
| WO2014162964A1 (en) * | 2013-04-03 | 2014-10-09 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| US9945001B2 (en) | 2013-04-03 | 2018-04-17 | Jfe Steel Corporation | Blast furnace operation method and lance |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62192509A (en) * | 1986-02-17 | 1987-08-24 | Kobe Steel Ltd | Method for blowing pulverized carbon into blast furnace |
| JPH05112806A (en) * | 1991-10-21 | 1993-05-07 | Nkk Corp | Method for blowing pulverized coal into blast furnace |
-
1991
- 1991-11-05 JP JP3288617A patent/JP2868941B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62192509A (en) * | 1986-02-17 | 1987-08-24 | Kobe Steel Ltd | Method for blowing pulverized carbon into blast furnace |
| JPH05112806A (en) * | 1991-10-21 | 1993-05-07 | Nkk Corp | Method for blowing pulverized coal into blast furnace |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8535410B1 (en) * | 2012-04-24 | 2013-09-17 | John D. Lynn | Blast furnace cooling method to increase steel production and reduce cost in a basic oxygen furnace |
| WO2014162964A1 (en) * | 2013-04-03 | 2014-10-09 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| JP5610109B1 (en) * | 2013-04-03 | 2014-10-22 | Ｊｆｅスチール株式会社 | Blast furnace operation method |
| US9938593B2 (en) | 2013-04-03 | 2018-04-10 | Jfe Steel Corporation | Blast furnace operation method |
| US9945001B2 (en) | 2013-04-03 | 2018-04-17 | Jfe Steel Corporation | Blast furnace operation method and lance |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2868941B2 (en) | 1999-03-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3058039B2 (en) | Converter steelmaking method | |
| CA1336542C (en) | Method for smelting and reducing iron ores and apparatus therefor | |
| EP0629708A1 (en) | Method and apparatus for the pneumatic transport of large iron-bearing particles | |
| US6585798B2 (en) | Fluidized bed reactor for preventing the fine iron ore from sticking therein and method thereof | |
| JPH05125412A (en) | Method for injecting powdery and granular materials from tuyere in vertical type furnace | |
| JP2608736B2 (en) | Method of charging exhaust gas dust in smelting reduction furnace | |
| JPH05125411A (en) | Method and device for injecting powdery material from tuyere in vertical type furnace | |
| JP3735016B2 (en) | Molten iron manufacturing method and molten iron manufacturing apparatus | |
| JP7517379B2 (en) | Method for pre-treating powdered raw materials to be fed into a refining furnace or a reaction furnace, and method for operating a refining furnace or a reaction furnace | |
| JPH06271917A (en) | Method for blowing powdery and granular material from tuyere in vertical furnace | |
| CN214881639U (en) | Preheating pre-reduction equipment and system suitable for smelting reduction process | |
| JPS6256537A (en) | Manufacture of molten metal from powdery ore containing metal oxide | |
| JPS59159908A (en) | Method for preventing clogging in transfer pipe for preliminarily reduced high temperature granular ore | |
| JPS6118633A (en) | Apparatus for transferring and supplying constant quantity of powder | |
| JPH0394006A (en) | Method for blowing powdery body from tuyere in blast furnace | |
| JPS59159907A (en) | Method for preventing clogging in transfer pipe for preliminarily reduced high temperature granular ore | |
| JP2581900B2 (en) | Supply method of smelting powder and granules to metallurgical furnace | |
| JPS59162212A (en) | Transfer pipe of preliminarily reduced granular ore | |
| JPS6296624A (en) | Copper making method | |
| JP2666397B2 (en) | Hot metal production method | |
| KR20020049591A (en) | Smelting reduction apparatus and method for decreasing a scatter of fines | |
| JPS62103310A (en) | Treatment for reforming refined slag | |
| JPS59113110A (en) | Transferring method of preliminarily reduced ore in vertical type furnace melt reduction method | |
| JPH01255610A (en) | Smelting reduction method for iron | |
| JPS62228889A (en) | Preheater in iron-ore spare reduction facility |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 19980623 |
|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19981215 |
|
| LAPS | Cancellation because of no payment of annual fees |