JP2545814B2 - Smelting reduction smelting equipment - Google Patents
Smelting reduction smelting equipmentInfo
- Publication number
- JP2545814B2 JP2545814B2 JP61287139A JP28713986A JP2545814B2 JP 2545814 B2 JP2545814 B2 JP 2545814B2 JP 61287139 A JP61287139 A JP 61287139A JP 28713986 A JP28713986 A JP 28713986A JP 2545814 B2 JP2545814 B2 JP 2545814B2
- Authority
- JP
- Japan
- Prior art keywords
- smelting
- furnace
- smelting reduction
- reduction
- heat
- 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
- Manufacture Of Iron (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、溶融還元製錬装置の改良に関する。The present invention relates to an improvement in a smelting reduction smelting apparatus.
（従来技術） 溶融還元は、溶鉄浴に鉄鉱石、炭材、媒溶剤及び酸素
を添加して溶鉄を直接製造する方法である。この方法に
使用する転炉タイプの溶融還元炉は、発生するガスを二
次燃焼して、その熱を溶鉄に着熱させ、熱効率の向上を
図る必要がある。このため近時各種方法、例えばスプラ
ッシュ等による熱交換が提案されているが、いずれも着
熱効率が十分とはいえない。また炉体が高温の二次燃焼
ガスで過熱され、損耗する問題もある。(Prior Art) Melt reduction is a method for directly producing molten iron by adding iron ore, carbonaceous material, a solvent and oxygen to a molten iron bath. In the converter type smelting reduction furnace used in this method, it is necessary to carry out secondary combustion of the generated gas and heat the heat to the molten iron to improve the thermal efficiency. For this reason, various methods have recently been proposed, for example, heat exchange by splash or the like, but none of them has sufficient heat-adhesion efficiency. There is also a problem that the furnace body is overheated by the high temperature secondary combustion gas and is worn.
（発明が解決する技術的課題） 本発明は、二次燃焼領域に微粉鉱石と微粉炭とを吹込
むことにより、これらをガス化し、このことにより二次
燃焼熱の有効利用を図るとともに、炉体近傍の温度を下
げて炉体の損耗を防止することができる溶融還元製錬装
置を提供することを目的とする。(Technical problem to be solved by the invention) The present invention is to blow fine pulverized ore and pulverized coal into the secondary combustion region to gasify them, thereby achieving effective utilization of the secondary combustion heat and the furnace. An object of the present invention is to provide a smelting reduction smelting apparatus capable of lowering the temperature near the body and preventing wear of the furnace body.
（技術的課題を解決する手段） 本発明は、転炉型溶融還元炉の二次燃焼領域に対応す
る箇所に、微粉鉱石と微粉炭とを炉内の円周方向に沿っ
て吹き込む複数のノズルを設けた溶融還元製錬装置であ
る。(Means for Solving the Technical Problem) The present invention relates to a plurality of nozzles for blowing fine ore and pulverized coal along a circumferential direction in a furnace at a location corresponding to a secondary combustion region of a converter-type smelting reduction furnace. It is a smelting reduction smelting apparatus provided with.
（発明の具体的説明） 第１図は、本発明にかかる溶融還元製錬装置の一実施
例を示す。この装置は、溶融還元炉の炉体11の開口上部
に煙道12を取付けている。炉体11は例えば底部及び側部
にそれぞれ吹込口13,14,15を取付けている。底部吹込口
13は、ここから酸素と炭材（主に微粉炭）を溶融還元炉
内の鉄浴に吹込むもので、この吹込みにより炭材の燃焼
及び鉄鉱石の還元を行なっている。側部吹込口14は、こ
こから酸素を吹込んでスラグを攪拌するもので、この攪
拌によりスラグの熱を鉄浴に伝達するとともにスラグと
鉄浴との反応を促進している。別の側部吹込口15は、こ
こから酸素を吹込んで、溶融還元炉から発生したCOガス
を燃焼して生成ガスを加熱し、この熱をスラグに伝達す
るようにしている。(Detailed Description of the Invention) FIG. 1 shows an embodiment of a smelting reduction smelting apparatus according to the present invention. In this apparatus, a flue 12 is attached to the upper part of an opening of a furnace body 11 of a smelting reduction furnace. The furnace body 11 has, for example, blow ports 13, 14, 15 attached to the bottom and sides thereof, respectively. Bottom blow port
In the figure, 13 blows oxygen and carbonaceous material (mainly pulverized coal) into an iron bath in a smelting reduction furnace, which burns carbonaceous material and reduces iron ore. The side blowing port 14 blows oxygen from here to stir the slag, and by this stirring, heat of the slag is transferred to the iron bath and the reaction between the slag and the iron bath is promoted. The other side blow-in port 15 blows oxygen from here, burns the CO gas generated from the smelting reduction furnace to heat the generated gas, and transfers this heat to the slag.
上記炉体11の上部には、第２図に示すように、二次燃
焼領域に対応した箇所に炉体のほぼ接線方向に複数のノ
ズル16が取付けられている。ノズル16からは、微粉鉱石
と微粉炭とを炉の周方向に沿って吹込むようになってい
る。これらをノズル16から吹込むと、二次燃焼領域の高
熱により以下の如くガス化反応及び還元反応が進行す
る。As shown in FIG. 2, a plurality of nozzles 16 are attached to the upper portion of the furnace body 11 at positions corresponding to the secondary combustion region in a substantially tangential direction of the furnace body. From the nozzle 16, fine ore and fine coal are blown along the circumferential direction of the furnace. When these are blown from the nozzle 16, the gasification reaction and reduction reaction proceed as follows due to the high heat in the secondary combustion region.
Ｃ＋CO2→2CO Fe2O3＋CO→2FeO＋CO2 FeO＋CO→Fe＋CO2 この反応は、吸熱反応であるから、高温ガスの着熱効
率の向上を図ることができる。また二次燃焼領域に接す
る炉壁の温度を下げるので、ここを損耗から保護するこ
とができる。C + CO 2 → 2CO Fe 2 O 3 + CO → 2FeO + CO 2 FeO + CO → Fe + CO 2 Since this reaction is an endothermic reaction, it is possible to improve the heat deposition efficiency of the high temperature gas. Further, since the temperature of the furnace wall in contact with the secondary combustion region is lowered, it can be protected from wear.
なおノズル17から吹込む量は、生成ガスの発生量、温
度にもとずいて適宜設定できる。例えば溶融還元炉から
の生成ガス（1800℃、1440m3/H、発生CO量＝410Nm3/H）
に微粉鉄鉱石330kg/Hと微粉炭79kg/Hとを吹込むと、生
成ガスは1500℃、1588Nm3/Hとなり、微粉鉄鉱石と微粉
炭吹込みによって生じたCOは67600kcal/kmolとなる。The amount blown from the nozzle 17 can be appropriately set based on the amount of generated gas and the temperature. For example, gas generated from a smelting reduction furnace (1800 ° C, 1440m 3 / H, CO generated = 410Nm 3 / H)
When pulverized iron ore 330 kg / H and pulverized coal 79 kg / H are blown into the product, the produced gas is 1500 ℃ and 1588 Nm 3 / H, and the CO produced by the fine iron ore and pulverized coal injection is 67600 kcal / kmol.
（発明の効果） 本発明によれば、二次燃焼領域に対応して炉体の周方
向に沿って微粉鉱石、微粉炭を吹き込むので、炉壁の保
護を図れ、かつ吸熱反応により微粉炭、微粉鉱石をガス
化することにより、熱を有効に回収することができる。(Effect of the invention) According to the present invention, since fine ore and pulverized coal are blown along the circumferential direction of the furnace body corresponding to the secondary combustion region, the furnace wall can be protected, and the pulverized coal by endothermic reaction, By gasifying fine ore, heat can be effectively recovered.
第１図は本発明の一実施例を示す概略断面図、第２図は
第１図の炉体上部の断面図である。 11……炉体、12……煙道、13……底部吹込口、14,15…
…側部吹込口、16……ノズルFIG. 1 is a schematic sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view of the upper portion of the furnace body in FIG. 11 …… furnace body, 12 …… flue, 13 …… bottom injection port, 14, 15…
… Side injection port, 16 …… Nozzle
Claims (1)
る箇所に、微粉鉱石と微粉炭とを炉内の円周方向に沿っ
て吹き込む複数のノズルを設けた溶融還元製錬装置。1. A smelting reduction smelting apparatus having a plurality of nozzles for blowing fine ore and pulverized coal in a circumferential direction in the furnace at a location corresponding to a secondary combustion region of a converter type smelting reduction furnace. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61287139A JP2545814B2 (en) | 1986-12-02 | 1986-12-02 | Smelting reduction smelting equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61287139A JP2545814B2 (en) | 1986-12-02 | 1986-12-02 | Smelting reduction smelting equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63140014A JPS63140014A (en) | 1988-06-11 |
| JP2545814B2 true JP2545814B2 (en) | 1996-10-23 |
Family
ID=17713573
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61287139A Expired - Lifetime JP2545814B2 (en) | 1986-12-02 | 1986-12-02 | Smelting reduction smelting equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2545814B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2768775B2 (en) * | 1989-09-04 | 1998-06-25 | 新日本製鐵株式会社 | Metal smelting reduction method and smelting reduction furnace |
| NZ237395A (en) * | 1990-03-13 | 1994-07-26 | Cra Services | Smelt reduction vessel: whirl of gases above molten metal bath reduces loss of liquid and solids |
| AT407052B (en) * | 1998-08-13 | 2000-12-27 | Voest Alpine Ind Anlagen | METHOD FOR PRODUCING LIQUID PIG IRON |
| UA91601C2 (en) * | 2006-03-01 | 2010-08-10 | ТЕХНОЛОДЖИКАЛ РЕСОРСИЗ ПиТиВай. ЛИМИТЕД | Direct smelting plant |
| CN104894322B (en) * | 2015-04-03 | 2017-07-21 | 钢铁研究总院 | The method and its device of a kind of multilayer slag fused reduction iron-smelting |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3607776A1 (en) * | 1986-03-08 | 1987-09-17 | Kloeckner Cra Tech | METHOD FOR PRODUCING IRON |
-
1986
- 1986-12-02 JP JP61287139A patent/JP2545814B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63140014A (en) | 1988-06-11 |
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