JPS62280312A - Melt reduction method - Google Patents
Melt reduction methodInfo
- Publication number
- JPS62280312A JPS62280312A JP12224586A JP12224586A JPS62280312A JP S62280312 A JPS62280312 A JP S62280312A JP 12224586 A JP12224586 A JP 12224586A JP 12224586 A JP12224586 A JP 12224586A JP S62280312 A JPS62280312 A JP S62280312A
- Authority
- JP
- Japan
- Prior art keywords
- blown
- metal
- secondary combustion
- furnace
- ore
- 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
Links
- 238000000034 method Methods 0.000 title claims description 10
- 239000002184 metal Substances 0.000 claims abstract description 40
- 238000002485 combustion reaction Methods 0.000 claims abstract description 26
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 14
- 238000003723 Smelting Methods 0.000 claims description 8
- 239000000446 fuel Substances 0.000 claims description 4
- 239000003610 charcoal Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000007664 blowing Methods 0.000 abstract description 9
- 239000002893 slag Substances 0.000 abstract description 5
- 230000004907 flux Effects 0.000 abstract description 2
- 239000000155 melt Substances 0.000 abstract description 2
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
Landscapes
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
［ａ業上の利用分野］
この発明は例えば炭材と鉱石と０２ガスとを炉内に吹き
込み、該炭材を燃焼させながら、この炉内で該鉱石を溶
融還元させる溶融還元法、特にメタル浴へ回収する二次
燃焼熱の回収効率の向上に関するものである。Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Application in Industry A] This invention is directed to blowing carbonaceous materials, ore, and 02 gas into a furnace, and while burning the carbonaceous materials. The present invention relates to a smelting reduction method in which the ore is smelted and reduced in a metal bath, and in particular to improving the recovery efficiency of secondary combustion heat to be recovered into a metal bath.
［従来の技術〕
従来の溶融還元法として、炭材と鉱石と０２カスとを炉
内に吹き込み、該炭材を燃焼させながら該鉱石を直接還
元させ、更に、炉内に０２ガスを吹き込んで発生するＣ
Ｏガスを二次燃焼させ、この二次燃焼によって発生する
熱を鉱石の還元に利用させる溶融５元法において、メタ
ル浴の上に形成されたスラグを熱媒体として二次燃焼ゾ
ーンに飛はし、二次燃焼によって発生する熱をスラグに
吸収させ、この熱をメタル浴へ伝えさせ、二次燃焼によ
って発生する熱を鉱石の還元に存効利用させ、炉内に吹
き込む炭材の使用量を削減させる溶融還元法をこの出願
に先立って提案した。[Prior art] As a conventional smelting reduction method, carbonaceous material, ore, and 02 scum are blown into a furnace, and the ore is directly reduced while burning the carbonaceous material, and 02 gas is further blown into the furnace. C that occurs
In the melting five-component method, in which O gas is secondary-combusted and the heat generated by this secondary combustion is used to reduce the ore, the slag formed on the metal bath is used as a heat medium and is blown to the secondary combustion zone. The heat generated by the secondary combustion is absorbed by the slag and transferred to the metal bath, and the heat generated by the secondary combustion is effectively used to reduce the ore, reducing the amount of carbon material blown into the furnace. Prior to filing this application, a melt reduction method was proposed to reduce the amount of carbon dioxide.
［発明か解決しようとする問題点］
上記のような従来の溶融還元法では、スラグのスブラン
シュによる熱の回収が充分効率的でないので、二次燃焼
比（炉内におけるＣＯ＋ Ｃｏ２＋ １１２＋Ｆ１２０
に対するＣｏ２＋ ８２０の比率）を上げ、炉外に排出
される排ガス流速が速くなり、伝熱時間が短くなった場
合には、第２図に示すように、二次燃焼による発熱をメ
タル浴に効率良く伝えることが困難になるという問題点
かあった。[Problems to be Solved by the Invention] In the conventional smelting reduction method as described above, the recovery of heat by the soot of slag is not efficient enough.
As shown in Figure 2, if the ratio of Co2+ to There was a problem that it became difficult to convey the message well.
この発明は、かかる問題点を解決するためになされたも
ので、二次燃焼による発熱をメタル浴に効率良く伝える
ことができる溶融還元法を得ることを目的とする。This invention was made to solve this problem, and aims to provide a smelting reduction method that can efficiently transmit heat generated by secondary combustion to a metal bath.
［問題点を解決するための手段］
この発明に係る溶融還元法は、炭材と鉱石と０２ガスと
を炉内に吹き込み、該炭材を燃焼させながら、この炉内
で該鉱石を溶融還元させ、該炭材の燃料により生成した
ＣＯガスを吹き込み０２ガスにより炉内で二次燃焼させ
る溶融逼元法において、溶融還元により生成したメタル
浴に粉体を含むガスを吹き込み、メタルをスプラッシュ
として上記二次燃焼ゾーンに飛ばすようにしたことを特
徴とするものである。[Means for Solving the Problems] The melting reduction method according to the present invention involves blowing carbonaceous material, ore, and 02 gas into a furnace, and melting and reducing the ore in the furnace while burning the carbonaceous material. In the melting and condensation method, in which CO gas generated from the carbonaceous fuel is blown in and secondary combustion is performed in the furnace using 02 gas, gas containing powder is blown into the metal bath generated by smelting reduction, and the metal is made into a splash. This is characterized in that the fuel is blown into the secondary combustion zone.
［作用］
この発明においては、メタル浴のメタルが粉体を含む吹
き込みガスによりスプラッシュとして二次燃焼ゾーンに
効率良く飛ばされ、このメタルのスプラッシュが二次燃
焼の発熱を効率良く吸収し、回収する。[Operation] In this invention, the metal in the metal bath is efficiently blown to the secondary combustion zone as a splash by the blown gas containing powder, and this metal splash efficiently absorbs and recovers the heat generated from the secondary combustion. .
［実施例］
第１図はこの発明を実施するための溶融還元炉の説明図
であり、図において、（１）は転炉型の炉、（２）はこ
の炉の底部に形成されたメタル浴、（３）はこのメタル
浴の上に形成されたスラグ、（４）は炉（１）の上部壁
に形成された二次燃焼用羽口、（５）は炉（１）の下部
壁メタル塔高さ位置に形成されたスプラッシュ形成用羽
口、（６）は底吹羽口である。[Example] Fig. 1 is an explanatory diagram of a melting reduction furnace for carrying out the present invention. (3) is the slag formed on the metal bath, (4) is the secondary combustion tuyere formed on the upper wall of the furnace (1), and (5) is the lower wall of the furnace (1). The splash forming tuyeres (6) are bottom blowing tuyeres formed at the height of the metal tower.
上記のように構成された溶融還元炉においては、炭材と
鉱石と０２ガスとを炉（１）内に吹き込み、該炭材を燃
焼させながら、この炉内で該鉱石を溶融還元させ、該炭
材の燃料により生成したＣＯガスを炉（１）内で吹き込
み０２ガスにより二次燃焼させ、スプラッシュ形成用羽
口（５）から粉体、例えば、炭材粉、フラックス粉又は
ＫＥ粉、を含む０２ガスを吹き込み、溶融還元により生
成したメタル浴（２）のメタルを吹き込みガスによりス
プラッシュとし二次燃焼ゾーンに飛ばすことになる。し
たかって、メタル浴（２）のメタルが吹き込みガスによ
りスプラッシュとし効率良く二次燃焼ゾーンに飛はされ
、このメタルのスプラッシュが二次燃焼の発熱を効率良
く吸収するから、二次燃焼の発熱がメタル浴（２）に効
率良く回収されることになる。すなわち、本発明の０．
Ｄ、比に対する着熱効率は、第２図に示すように、従来
の方法よりも向上していることかわかる。In the smelting reduction furnace configured as described above, carbonaceous material, ore, and 02 gas are blown into the furnace (1), and while the carbonaceous material is combusted, the ore is smelted and reduced in the furnace. CO gas generated from carbonaceous fuel is blown into the furnace (1) and secondary combustion is performed using 02 gas, and powder, such as carbonaceous powder, flux powder, or KE powder, is released from the splash-forming tuyeres (5). The 02 gas containing the metal is blown into the metal bath (2), and the metal in the metal bath (2) generated by melting and reduction is turned into a splash by the blown gas and blown to the secondary combustion zone. Therefore, the metal in the metal bath (2) is efficiently blown into the secondary combustion zone as a splash by the blown gas, and this metal splash efficiently absorbs the heat generated by the secondary combustion, so that the heat generated by the secondary combustion is reduced. It will be efficiently collected in the metal bath (2). That is, 0.0 of the present invention.
As shown in FIG. 2, it can be seen that the heat transfer efficiency with respect to the D ratio is improved compared to the conventional method.
又、溶湯をスプラッシュとして飛ばした場合、溶湯中の
カーホン含有量か高ければ、溶湯中のカーボンか二次燃
焼ゾーンの６０２ガスと反応して［；０２＋Ｃ−２ＧＯ
と吸熱反応を生じ、第３図に示すように、着熱効率を低
下させてしまうか、上記実施例ではメタル浴（２）のメ
タルを吹き込み０２ガスによりスプラッシュとし二次燃
焼ゾーンに飛ばすので、スプラッシュ中のカーホン含有
量が吹き込み０２ガスによりあらかじめ酸化されて少な
くなっており、従って、着熱効率が向上することになる
。In addition, when the molten metal is splashed, if the carbon content in the molten metal is high, it reacts with the carbon in the molten metal or the 602 gas in the secondary combustion zone, resulting in [;02+C-2GO
This causes an endothermic reaction and reduces the heat transfer efficiency as shown in Figure 3.In the above embodiment, the metal in the metal bath (2) is blown into the metal bath (2) and made into a splash by the 02 gas, which is sent to the secondary combustion zone. The carphone content therein has been previously oxidized by the blown O2 gas and has been reduced, thus improving the heat transfer efficiency.
なお、上記実施例では底吹き羽口から炉内に０２ガスを
吹き込ませることにより、溶融還元するものとしている
が、上吹きランスから炉内にＯ２ガスを吹き込ませても
同様の動作を期待できる。In the above example, melting and reduction is performed by blowing O2 gas into the furnace from the bottom blowing tuyere, but the same operation can be expected by blowing O2 gas into the furnace from the top blowing lance. .
［発明の効果］
この発明は以上説明したとおり、メタル浴に粉体を含む
ガスを吹き込むようにしたので、粉体の運動エネルギー
により、スプラッシュとなり難いメタルを簡単にスプラ
ッシュとして二次燃焼ゾーンに飛ばすことができ、従っ
て、二次燃焼の発熱がメタルのスプラッシュにより効率
良く吸収され、メタル浴に効率良く回収されるという効
果がある。[Effects of the Invention] As explained above, in this invention, gas containing powder is blown into the metal bath, so metal that is difficult to become a splash is easily blown into the secondary combustion zone by the kinetic energy of the powder. Therefore, there is an effect that the heat generated by the secondary combustion is efficiently absorbed by the metal splash and efficiently recovered into the metal bath.
【図面の簡単な説明】
第１図はこの発明を実施するための？８融逼元炉の説明
図、第２図は、ＯＤ比と着熱効率との関係を示すグラフ
である。[Brief Description of the Drawings] Figure 1 shows how to carry out this invention? FIG. 2, an explanatory diagram of the 8-melting source furnace, is a graph showing the relationship between the OD ratio and the heat transfer efficiency.
Claims (1)
燃焼させながら、この炉内で該鉱石を溶融還元させ、該
炭材の燃料により生成したＣＯガスを吹き込みＯ＿２ガ
スにより炉内で二次燃焼させる溶融還元法において、溶
融還元により生成したメタル浴に粉体を含むガスを吹き
込み、メタルをスプラッシュとして上記二次燃焼ゾーン
に飛ばすようにしたことを特徴とする溶融還元法。Charcoal material, ore, and O_2 gas are blown into the furnace, and while the carbon material is being burned, the ore is melted and reduced in the furnace. CO gas generated by the fuel of the carbon material is blown into the furnace with O_2 gas. A smelting reduction method in which a gas containing powder is blown into a metal bath generated by smelting reduction, and the metal is blown into the secondary combustion zone as a splash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12224586A JPS62280312A (en) | 1986-05-29 | 1986-05-29 | Melt reduction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12224586A JPS62280312A (en) | 1986-05-29 | 1986-05-29 | Melt reduction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62280312A true JPS62280312A (en) | 1987-12-05 |
Family
ID=14831183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12224586A Pending JPS62280312A (en) | 1986-05-29 | 1986-05-29 | Melt reduction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62280312A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001158906A (en) * | 1999-09-27 | 2001-06-12 | Technological Resources Pty Ltd | Direct smelting method |
| JP2008255494A (en) * | 1997-09-26 | 2008-10-23 | Technological Resources Pty Ltd | Direct smelting method for producing metal from metal oxide |
-
1986
- 1986-05-29 JP JP12224586A patent/JPS62280312A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008255494A (en) * | 1997-09-26 | 2008-10-23 | Technological Resources Pty Ltd | Direct smelting method for producing metal from metal oxide |
| JP2001158906A (en) * | 1999-09-27 | 2001-06-12 | Technological Resources Pty Ltd | Direct smelting method |
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