JPS62280315A - Melt reduction method - Google Patents
Melt reduction methodInfo
- Publication number
- JPS62280315A JPS62280315A JP12224886A JP12224886A JPS62280315A JP S62280315 A JPS62280315 A JP S62280315A JP 12224886 A JP12224886 A JP 12224886A JP 12224886 A JP12224886 A JP 12224886A JP S62280315 A JPS62280315 A JP S62280315A
- Authority
- JP
- Japan
- Prior art keywords
- slag layer
- secondary combustion
- metal bath
- furnace
- metal
- 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 abstract description 11
- 239000002184 metal Substances 0.000 claims abstract description 35
- 238000002485 combustion reaction Methods 0.000 claims abstract description 31
- 239000002893 slag Substances 0.000 claims abstract description 24
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 15
- 238000007664 blowing Methods 0.000 claims abstract description 10
- 238000003723 Smelting Methods 0.000 claims description 8
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 239000000155 melt Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
３、発明の詳細な説明
〔産業上の利用分野コ
この発明は例えは炭材と鉱石と０２ガスとを炉内のスラ
グ層内に吹き込み、該炭材をスラグ層内て燃焼させなが
ら該鉱石を還元させる？８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 [Industrial Field of Application] This invention, for example, involves blowing carbon material, ore, and 02 gas into a slag layer in a furnace, and then blowing the carbon material into the slag layer. Reduce the ore while burning it internally? This paper relates to the 8 fusion reduction method, particularly to improving the recovery efficiency of secondary combustion heat recovered into a metal bath.
［従来の技術］
従来の熔融還元法として、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還元法をこの出願に先
立って提案した。[Prior art] As a conventional melt reduction method, carbonaceous material, ore, and 02 gas 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
Prior to filing this application, we had proposed a smelting reduction method in which O gas is subjected to secondary combustion and the heat generated by this secondary combustion is used to reduce ore.
［発明か解決しようとする問題点コ
上記のような従来の溶融還元法では、二次燃焼比（炉内
におけるＣ、０＋ ｃｏ、 ＋ Ｊ＋ ）１２０に対す
るＣｏ２＋ ８２０の比率）を上げれば、炉外に排出さ
れるＨＦガス流速が速くなり、排ガスの伝熱時間が短く
なるので、第２図に示すように、二次燃焼による顕熱を
メタル浴に効率良く伝えることか困難になるという問題
点があった。[Problems to be solved by the invention] In the conventional smelting reduction method as described above, by increasing the secondary combustion ratio (ratio of Co2+ 820 to 120 C, 0+ co, + J+ inside the furnace), The problem is that the flow rate of the HF gas discharged into the metal bath becomes faster and the heat transfer time of the exhaust gas becomes shorter, making it difficult to efficiently transfer sensible heat from secondary combustion to the metal bath, as shown in Figure 2. was there.
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、二次燃焼の顕熱をメタル浴に効率良く伝えること
か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 these problems, and aims to provide a smelting reduction method that can efficiently transfer the sensible heat of 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
を炉内のスラグ層内に吹き込み、該炭材を該スラグ層内
で燃焼させながら該鉱石を還元させる溶融還元法におい
て、炉壁のスラグ層高さ位置からこのスラグ層内に０２
ガスを吹き込み、該スラグ層内で該炭材の燃焼により生
成したＣＯガスを該吹き込み０２ガスにより二次燃焼さ
せ、炉壁メタル浴高さ位置から該メタル浴内にガスを吹
き込み、該二次燃焼ゾーンにメタルのスプラッシュを飛
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 smelting reduction method according to the present invention involves blowing carbonaceous materials, ore, and 02 gas into a slag layer in a furnace, and burning the carbonaceous materials within the slag layer. In the smelting reduction method for reducing ore, 0.2
Gas is blown into the metal bath from the height of the metal bath on the furnace wall to cause secondary combustion of CO gas generated by combustion of the carbonaceous material in the slag layer. It is characterized by a metal splash being thrown into the combustion zone.
〔作用］
この発明においては、炉壁メタル浴高さ位置からメタル
浴内にガスを吹き込み、二次燃焼ゾーンにメタルのスプ
ラッシュを飛ばすようにしたので、二次燃焼の顕熱がが
メタルに直接捕えられて、メタル浴に回収される。[Operation] In this invention, gas is blown into the metal bath from the height of the metal bath on the furnace wall, and the metal splash is thrown into the secondary combustion zone, so that the sensible heat of the secondary combustion is directly transferred to the metal. He is captured and collected in a metal bath.
［実施例］
′！ＦＳ１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
）はこの炉内に挿入された上吹ぎランス、（３）はこの
炉の底部に形成されたメタル浴、（４）はこのメタル浴
（３）上に形成されたスラグ層、（５）は炉壁のスラグ
層（４）高さ位置に形成された二次燃焼用羽口、（６）
は炉壁下部メタル浴（３）高き位置に形成されたスプラ
ッシュ形成用羽口、（７）は炉壁のスラグ層（４）高さ
位置で、二次燃焼用羽口（５）より上部高さ位置に形成
された排滓口、（８）は炉壁下部メタル浴（３）高さ位
置に形成された出銑口、（９）は底吹羽口である。[Example] '! Figure FS1 is an explanatory diagram of a melting reduction furnace for carrying out the present invention. In the figure, (1) is a converter type furnace, (2)
) is the top blowing lance inserted into this furnace, (3) is the metal bath formed at the bottom of this furnace, (4) is the slag layer formed on this metal bath (3), (5) tuyere for secondary combustion formed at the height of the slag layer (4) on the furnace wall, (6)
(7) is the tuyere for splash formation formed at the height of the metal bath (3) in the lower part of the furnace wall, and (7) is the height of the slag layer (4) on the furnace wall, which is higher than the secondary combustion tuyere (5). (8) is the tap hole formed at the height of the metal bath (3) in the lower part of the furnace wall, and (9) is the bottom blowing tuyere.
上記のように構成された溶融還元炉においては、上吹き
ランス（２）から炭材と鉱石とＯ２ガスとを炉（１）内
のスラグ層（４）内に吹き込み、該炭材をスラグ層（４
）内で燃焼させながら該鉱石を溶融還元させ、二次燃焼
用羽口（５）からスラグ層（４）内に０２ガスを吹き込
み、該炭材の燃焼により生成したＣＯガスをスラグ層（
４）内で二次燃焼させ、スプラッシュ形成用羽口（６）
からガスを吹き込み、二次燃焼ゾーンにメタルのスプラ
ッシュを飛ばす。二次燃焼の顕熱はメタルのスプラッシ
ュに直接吸収されてメタル（３）浴に伝えられるから、
二次燃焼の顕熱がメタル浴（３）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
していることがわかる。In the smelting reduction furnace configured as described above, carbonaceous materials, ore, and O2 gas are blown into the slag layer (4) in the furnace (1) from the top blowing lance (2), and the carbonaceous materials are blown into the slag layer (4). (4
) The ore is melted and reduced while being burned in the slag layer (
4) Secondary combustion within the tuyeres (6) for splash formation
Gas is blown into the secondary combustion zone to send a splash of metal into the secondary combustion zone. Sensible heat from secondary combustion is directly absorbed by the metal splash and transferred to the metal (3) bath.
Sensible heat from secondary combustion is efficiently recovered into the metal bath (3). 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.
［発明の効果コ
この発明は以上説明したとおり、炉壁からスラグ層中に
０．ガスを吹き込み、炭材の燃料により生成したＣＯガ
スをこの吹き込み０２ガスによりスラグ層中で二次燃焼
させ、この二次燃焼ゾーンにメタルのスプラッシュを飛
ばすようにしたので、二次燃焼の顕熱がメタルのスプラ
ッシュに直接捕えられて、メタル浴に伝えられ、従って
、二次燃焼の顕熱が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, the present invention has a 0.0-. The CO gas generated by the carbon fuel is blown into the slag layer, and the blown gas is used to cause secondary combustion in the slag layer, and metal splash is thrown into the secondary combustion zone, so the sensible heat of the secondary combustion is reduced. is directly captured by the metal splash and transmitted to the metal bath, thus having the effect that the sensible heat of secondary combustion is efficiently recovered to the metal bath.
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
、第２図は、ＯＤ、比と着熱効率との関係を示すグラフ
である。
図において、（１）は炉、（２）は上吹きランス、（３
）はメタル浴、（４）はスラグ層、（５）！ｉよ二次燃
焼用羽口、（６）はスプラッシュ形成用羽口、（７）は
排滓口、（８）は出銑口、（９）は底吹羽口である。
代理人 弁理士 佐 藤 正 年
１郊効キ（％）
漫 孫FIG. 1 is an explanatory diagram of a melting reduction furnace for implementing the present invention, and FIG. 2 is a graph showing the relationship between OD, ratio, and heat transfer efficiency. In the figure, (1) is the furnace, (2) is the top blowing lance, and (3) is the furnace.
) is the metal bath, (4) is the slag layer, (5)! i is a tuyere for secondary combustion, (6) is a tuyere for splash formation, (7) is a slag discharge port, (8) is a tap hole, and (9) is a bottom blowing tuyere. Agent Patent Attorney Tadashi Sato Year 1 Subaru Ki (%) Man Son
Claims (1)
み、該炭材を該スラグ層内で燃焼させながら該鉱石を還
元させる溶融還元法において、炉壁のスラグ層高さ位置
からこのスラグ層内にＯ＿２ガスを吹き込み、該スラグ
層内で該炭材の燃焼により生成したＣＯガスを該吹き込
みＯ＿２ガスにより二次燃焼させ、炉壁メタル浴高さ位
置から該メタル浴内にガスを吹き込み、該二次燃焼ゾー
ンにメタルのスプラッシュを飛ばすようにしたことを特
徴とする溶融還元法。In the smelting reduction method, in which carbonaceous material, ore, and O_2 gas are blown into the slag layer in the furnace, and the ore is reduced while burning the carbonaceous material within the slag layer, this O_2 gas is blown into the slag layer, and the CO gas generated by combustion of the carbonaceous material in the slag layer is secondary combusted by the blown O_2 gas, and the gas is injected into the metal bath from the height of the metal bath on the furnace wall. A smelting reduction method characterized by blowing metal into the secondary combustion zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12224886A JPS62280315A (en) | 1986-05-29 | 1986-05-29 | Melt reduction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12224886A JPS62280315A (en) | 1986-05-29 | 1986-05-29 | Melt reduction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62280315A true JPS62280315A (en) | 1987-12-05 |
Family
ID=14831259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12224886A Pending JPS62280315A (en) | 1986-05-29 | 1986-05-29 | Melt reduction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62280315A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02301506A (en) * | 1989-05-16 | 1990-12-13 | Nkk Corp | Method for reducing ni ore and smelting furnace |
| EP0726326A3 (en) * | 1995-02-13 | 1996-12-27 | Hoogovens Staal Bv | Method for producing molten pig iron |
| EP0819182A4 (en) * | 1995-04-07 | 1998-09-30 | Tech Resources Pty Ltd | A method of producing metals and metal alloys |
| WO2000001855A1 (en) * | 1998-07-01 | 2000-01-13 | Technological Resources Pty. Ltd. | A direct smelting process |
| EP1087022A1 (en) * | 1999-09-27 | 2001-03-28 | Technological Resources Pty. Ltd. | A direct smelting process |
| US6322745B1 (en) | 1998-07-01 | 2001-11-27 | Technological Resources Pty. Ltd. | Direct smelting vessel and direct smelting process |
| US8016912B2 (en) | 2007-09-14 | 2011-09-13 | Barrick Gold Corporation | Process for recovering platinum group metals using reductants |
-
1986
- 1986-05-29 JP JP12224886A patent/JPS62280315A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02301506A (en) * | 1989-05-16 | 1990-12-13 | Nkk Corp | Method for reducing ni ore and smelting furnace |
| EP0726326A3 (en) * | 1995-02-13 | 1996-12-27 | Hoogovens Staal Bv | Method for producing molten pig iron |
| EP0819182A4 (en) * | 1995-04-07 | 1998-09-30 | Tech Resources Pty Ltd | A method of producing metals and metal alloys |
| US6267799B1 (en) | 1995-04-07 | 2001-07-31 | Technological Resources Pty. Ltd. | Method of producing metals and metal alloys |
| WO2000001855A1 (en) * | 1998-07-01 | 2000-01-13 | Technological Resources Pty. Ltd. | A direct smelting process |
| US6322745B1 (en) | 1998-07-01 | 2001-11-27 | Technological Resources Pty. Ltd. | Direct smelting vessel and direct smelting process |
| EP1087022A1 (en) * | 1999-09-27 | 2001-03-28 | Technological Resources Pty. Ltd. | A direct smelting process |
| US8016912B2 (en) | 2007-09-14 | 2011-09-13 | Barrick Gold Corporation | Process for recovering platinum group metals using reductants |
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