JPS61284509A - Method for effective utilization of converter waste gas - Google Patents
Method for effective utilization of converter waste gasInfo
- Publication number
- JPS61284509A JPS61284509A JP12633485A JP12633485A JPS61284509A JP S61284509 A JPS61284509 A JP S61284509A JP 12633485 A JP12633485 A JP 12633485A JP 12633485 A JP12633485 A JP 12633485A JP S61284509 A JPS61284509 A JP S61284509A
- Authority
- JP
- Japan
- Prior art keywords
- converter
- gas
- reactor
- fluidized bed
- waste gas
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Manufacture Of Iron (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は金属鉱石粉末の精錬技術に関し、転炉と流動層
予備還元装置との組み合わせによる粉状鉱石の還元にお
ける転炉排ガスの有効利用方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metal ore powder refining technology, and a method for effectively utilizing converter exhaust gas in reducing powdery ore using a combination of a converter and a fluidized bed preliminary reduction device. Regarding.
従来転炉排ガスは、その顕熱を蒸気として回収し、ＷＩ
８は冷却した後燃料ガスとして利用していた。しかし、
１）回収顕熱量が少なく、回収装置の熱効率が低い。Conventionally, the sensible heat of converter exhaust gas is recovered as steam, and WI
8 was used as fuel gas after cooling. However, 1) The amount of sensible heat recovered is small, and the thermal efficiency of the recovery device is low.
２）冷却により顕然の大部分を捨てている。2) Most of the apparent energy is discarded by cooling.
３）排ガスの還元ポテンシャルが利用されていない。3) The reduction potential of exhaust gas is not utilized.
４）排ガスの圧力が低いため利用するためには昇圧する
ことが必要である。4) Since the pressure of exhaust gas is low, it is necessary to increase the pressure in order to use it.
などの問題があった。There were other problems.
転炉排ガスは１３００〜１６００℃の高温であり、かつ
ＣＯを５０〜８０％含有する高還元性ガスである。従来
は蒸気による顕然回収と、回収ガスの燃料として間接的
に利用されていた。The converter exhaust gas has a high temperature of 1300 to 1600°C and is a highly reducing gas containing 50 to 80% CO. Conventionally, gas was recovered explicitly using steam, and the recovered gas was used indirectly as fuel.
しかし、蒸気による顕然回収したあと、湯葉５００〜８
００℃のガス保有顕熱は回収されていなかったし、また
還元ポテンシャルは利用されていなかった。However, after obvious recovery with steam, Yuba 500~8
The sensible heat held by the gas at 00°C was not recovered, and the reduction potential was not utilized.
また転炉ガスは圧力がないので、有効利用するためには
昇圧しなければならないという問題があった。Furthermore, since converter gas has no pressure, there is a problem in that the pressure must be increased in order to use it effectively.
本発明はこのような転炉排ガスの欠点を克服し、特性を
生かして有効に利用する方法を提供することを目的とす
るものである。The present invention aims to overcome these drawbacks of converter exhaust gas and provide a method for effectively utilizing its characteristics.
転炉排ガスラインに流動層型反応器を設置し、さらに流
動層型反応器の下流に排ガス吸引装置を設置し、排ガス
を吸引することによって流動層型反応器内に高温の還元
性ガスを導入する。A fluidized bed reactor is installed in the converter exhaust gas line, and an exhaust gas suction device is installed downstream of the fluidized bed reactor, and high temperature reducing gas is introduced into the fluidized bed reactor by sucking the exhaust gas. do.
排ガスを吸引することによって、流動層型反応器内に高
温の還元性ガスを負圧で導入することができる。By suctioning the exhaust gas, high-temperature reducing gas can be introduced into the fluidized bed reactor under negative pressure.
負圧で排ガスを導入した流動層内に鉱石を装入し、鉱石
の予熱、予備還元を行う場合、■ 反応平衡上、負圧下
では正圧・の場合より低い還元温度で同等の還元速度を
得ることができる。When ore is charged into a fluidized bed into which exhaust gas is introduced under negative pressure, and the ore is preheated and pre-reduced, ■ In terms of reaction equilibrium, the same reduction rate can be achieved at a lower reduction temperature under negative pressure than under positive pressure. Obtainable.
■ 鉱石中に炭材を混入すると、還元速度が大となる利
点がある。■ Mixing carbonaceous material into ore has the advantage of increasing the reduction rate.
これは、
ＦｅＯ＋Ｃ−＋Ｆｅ＋ＧＯ
なるガスを発生する反応によるもので減圧下で還元反応
速度が犬となるからである。This is because the reaction generates the gas FeO+C-+Fe+GO, and the reduction reaction rate is slow under reduced pressure.
第１図に本発明方法の実施例の系統図を示した。５トン
転炉１の排ガスライン６に流動層反応器２を設置し、流
動層反応器２の出口ガスライン７に冷却除塵装置３を介
して吸引装置４を設けた。FIG. 1 shows a system diagram of an embodiment of the method of the present invention. A fluidized bed reactor 2 was installed in the exhaust gas line 6 of the 5-ton converter 1, and a suction device 4 was installed in the outlet gas line 7 of the fluidized bed reactor 2 via a cooling dust removal device 3.
吸引装置４は流動層反応器ｚ内に鉄鉱石５００ｋｇ／チ
ャージを装入し、ガスホルダ５から送られた転炉ガスを
バーナで予熱し、流動層反応器内壁および鉱石を８５０
℃まで昇温する。The suction device 4 charges 500 kg of iron ore/charge into the fluidized bed reactor z, preheats the converter gas sent from the gas holder 5 with a burner, and removes the inner wall of the fluidized bed reactor and the ore by 850 kg/charge.
Raise the temperature to ℃.
次に転炉の吹錬開始と同時に転炉発生ガスを流動層内に
導入する。この転炉発生ガス導入は吸引装置４を用いて
流動層が負圧になるようにして行なわれる。Next, simultaneously with the start of blowing in the converter, the gas generated in the converter is introduced into the fluidized bed. This introduction of the converter generated gas is carried out using the suction device 4 so that the fluidized bed has a negative pressure.
導入ガスの状態は次の通りである。The conditions of the introduced gas are as follows.
温度二８５０℃（発生ガス１２００℃）圧カニ−１００
０ｍｍＡｑ
発生ガス量二３ＯＮｒｎ’／時間
ＣＯ濃度＝７５容量％
この導入ガスは流動層反応器内の粉状鉱石を流動化し、
予＠還元を行う。Temperature 2850℃ (generated gas 1200℃) Pressure crab-100
0mmAq Generated gas amount 23ONrn'/hour CO concentration = 75% by volume This introduced gas fluidizes the powdered ore in the fluidized bed reactor,
Pre-refund.
転炉吹錬終了後、流動層から排出した鉱石は約４１０ｇ
、温度７００℃還元率６０〜６５％であった。After converter blowing, approximately 410g of ore was discharged from the fluidized bed.
The reduction rate was 60 to 65% at a temperature of 700°C.
本発明は次の効果を奏する。 The present invention has the following effects.
イ） 転炉排ガスの顕然と還元ポテンシャルを十分利用
し、転炉に装入する鉱石の予熱、予備還元を行うことに
より転炉の操業時間や！ＩＰ？原単位が減少する。b) By making full use of the obvious reduction potential of the converter exhaust gas and preheating and pre-reducing the ore charged into the converter, the operating time of the converter can be reduced. IP? The basic unit will decrease.
口） 転炉排ガスの顕然の回収により、排ガス冷却装置
の負荷を減少させることができる。) The load on the exhaust gas cooling system can be reduced by the apparent recovery of converter exhaust gas.
ハ） 鉱石中に炭材を混入することにより、排ガスの潜
熱の減少を抑制することができる。C) By mixing carbonaceous material into ore, it is possible to suppress the decrease in latent heat of exhaust gas.
二） 流動層予備還元を負圧下で行うので還元温度を低
くすることができる。2) Since the fluidized bed preliminary reduction is performed under negative pressure, the reduction temperature can be lowered.
ｌ・・・転炉
２・・・流動層子＠還元反応器
３・・・冷却除塵装置 ４・・・吸引装置５・・・
ガスホルダ ６・・・転炉排ガス管路７・・・流
動層排ガス管路l... Converter 2... Fluidized bed @ reduction reactor 3... Cooling dust removal device 4... Suction device 5...
Gas holder 6...Converter exhaust gas pipe 7...Fluidized bed exhaust gas pipe
Claims (1)
状鉱石を流動層予備還元反応器を経て転炉に装入すると
共に、転炉排ガスを負圧にて流動層予備還元反応器に導
入することを特徴とする転炉排ガスの有効利用方法。1 A converter and a fluidized bed pre-reduction reactor are connected in series, and powdered ore is charged into the converter via the fluidized bed pre-reduction reactor, and the converter exhaust gas is subjected to a fluidized bed pre-reduction reaction under negative pressure. A method for effectively utilizing converter exhaust gas, which is characterized by introducing it into a converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12633485A JPS61284509A (en) | 1985-06-12 | 1985-06-12 | Method for effective utilization of converter waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12633485A JPS61284509A (en) | 1985-06-12 | 1985-06-12 | Method for effective utilization of converter waste gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61284509A true JPS61284509A (en) | 1986-12-15 |
| JPH0214411B2 JPH0214411B2 (en) | 1990-04-09 |
Family
ID=14932605
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12633485A Granted JPS61284509A (en) | 1985-06-12 | 1985-06-12 | Method for effective utilization of converter waste gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61284509A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012091437A3 (en) * | 2010-12-28 | 2012-09-07 | 주식회사 포스코 | Integrated steel manufacturing system and method for integrated steel manufacturing |
-
1985
- 1985-06-12 JP JP12633485A patent/JPS61284509A/en active Granted
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012091437A3 (en) * | 2010-12-28 | 2012-09-07 | 주식회사 포스코 | Integrated steel manufacturing system and method for integrated steel manufacturing |
| KR101228638B1 (en) * | 2010-12-28 | 2013-01-31 | 주식회사 포스코 | Integrated iron and steelmaking system and method |
| CN103562414A (en) * | 2010-12-28 | 2014-02-05 | Posco公司 | Integrated steel manufacturing system and method for integrated steel manufacturing |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0214411B2 (en) | 1990-04-09 |
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