JPH06136421A - Device for effectively utilizing heat retained in furnace top waste gas of coke packed bed type smelting reduction furnace - Google Patents

Device for effectively utilizing heat retained in furnace top waste gas of coke packed bed type smelting reduction furnace

Info

Publication number
JPH06136421A
JPH06136421A JP29153392A JP29153392A JPH06136421A JP H06136421 A JPH06136421 A JP H06136421A JP 29153392 A JP29153392 A JP 29153392A JP 29153392 A JP29153392 A JP 29153392A JP H06136421 A JPH06136421 A JP H06136421A
Authority
JP
Japan
Prior art keywords
exhaust gas
smelting reduction
furnace
reduction furnace
packed bed
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.)
Withdrawn
Application number
JP29153392A
Other languages
Japanese (ja)
Inventor
Yoichi Watanabe
洋一 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Original Assignee
Kawasaki Steel Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP29153392A priority Critical patent/JPH06136421A/en
Publication of JPH06136421A publication Critical patent/JPH06136421A/en
Withdrawn legal-status Critical Current

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  • Manufacture Of Iron (AREA)
  • Blast Furnaces (AREA)

Abstract

PURPOSE:To effectively utilize the heat retained in the furnace top waste gases of a coke packed bed type smelting reduction furnace for producing metal by blowing powder and granular materials contg. the oxides of effective metals, such as iron ore, from tuyeres into the furnace and subjecting these materials to smelting reduction. CONSTITUTION:A furnace top boiler 27 is provided and the waste gases are subjected to secondary combustion in the furnace top part to generate steam. Electric power is generated by a turbine 29. The waste gases after the secondary combustion enter a heat exchanger 11 for blasting where the waste gases heat air for blasting from about 80 deg.C up to 480 deg.C and thereafter, about 450 deg.C waste gases are obtd. These waste gases dry about 2100kg/H (about 50% water content) slurry-like raw material powder sprayed in a spray dryer 10 and the temp. thereof falls down to about 180 deg.C.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、鉄鉱石等の有効金属の
酸化物を含む粉体を溶融還元して、金属を製造するコー
クス充填層型溶融還元炉の排ガス保有熱の有効利用装置
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for effectively utilizing the exhaust gas retained heat of a coke packed bed type smelting reduction furnace for producing metal by smelting and reducing powder containing oxides of effective metals such as iron ore. .

【0002】[0002]

【従来の技術】一般に、コークス充填層型溶融還元炉を
用いて金属を溶融還元する方法は図2に示すようなプロ
セスフローで行われる。他部門で発生したスラリー状の
原料粉はシックナ23に供給され、底部に沈殿する。濃
縮したスラリー状の原料粉はポンプ(P)でデカンタ8
に送られここで脱水され、更に濃縮された後スプレード
ライヤ(乾燥機)10内に噴霧する。
2. Description of the Related Art In general, a method of smelting and reducing a metal by using a coke packed bed type smelting reduction furnace is performed by a process flow as shown in FIG. The slurry-like raw material powder generated in another department is supplied to the thickener 23 and settles on the bottom. The concentrated slurry raw material powder is decanted by a pump (P).
To the spray dryer (dryer) 10 and then sprayed.

【0003】一方、熱風発生装置11a,11bで生成
した高温の燃焼排ガスがスプレードライヤ10に吹込ま
れる。スプレードライヤ10内では吹込まれた高温の燃
焼排ガスにより、噴霧したスラリー状の原料粉が乾燥さ
れ、乾燥原料粉となってスプレードライヤ10の底部に
堆積する。スプレードライヤ10を通過した燃焼排ガス
は次の集塵機12で更に除塵され、煙突6から大気に放
出される。
On the other hand, the high temperature combustion exhaust gas generated by the hot air generators 11a and 11b is blown into the spray dryer 10. The sprayed high temperature combustion exhaust gas in the spray dryer 10 dries the sprayed raw material powder in the form of a slurry and deposits it on the bottom of the spray dryer 10 as a dry raw material powder. The combustion exhaust gas that has passed through the spray dryer 10 is further dust-removed by the next dust collector 12, and is discharged from the chimney 6 to the atmosphere.

【0004】スプレードライヤ10及び集塵機12の底
部に堆積した乾燥した原料粉とダストは抜き取られ、貯
槽13に装入した後、均排圧ホッパ18とインジェクシ
ョンタンク25を通って、羽口15より竪型溶融還元炉
14に吹込まれる。吹込まれた原料粉は、溶融還元炉1
4内で還元され、溶融して金属21が製造される。この
溶融還元炉14はコークス16を充填した充填層型炉で
ある。
The dry raw material powder and dust accumulated on the bottoms of the spray dryer 10 and the dust collector 12 are extracted, charged into the storage tank 13, and then passed through the pressure equalizing hopper 18 and the injection tank 25, and then vertically from the tuyere 15. It is blown into the mold smelting reduction furnace 14. The raw material powder blown into the smelting reduction furnace 1
4 is reduced and melted to produce the metal 21. The smelting reduction furnace 14 is a packed bed type furnace filled with coke 16.

【0005】また、この溶融還元炉14より排出した排
ガスはサイクロン17で乾式1次除塵した後、ベンチュ
リースクラバ22で冷却及び湿式2次除塵し清浄ガスと
なる。このガスは送風機20より、羽口15に送られ
る。また、コークス16燃焼用空気を昇熱する熱交換器
11の燃焼用ガスとして使用される。また、スプレード
ライヤ10へ乾燥用熱風を供給する熱風発生装置11a
の燃焼用ガスとしても使用される。なお、上記ベンチュ
リースクラバ22で除去された排ガス中のダストは、循
環水中に含まれシックナ5で沈降濃縮され、次にデカン
タ8によって更に濃縮された後、原料スラリーと同様ス
プレードライヤ10に送られて、原料となる。また排ガ
ス冷却に使用した循環水は冷却塔26で冷却され、再び
ベンチュリースクラバ22に送られる。
The exhaust gas discharged from the smelting reduction furnace 14 is subjected to dry primary dust removal by the cyclone 17, and then cooled and wet secondary dust removed by the Venturi scrubber 22 to become clean gas. This gas is sent from the blower 20 to the tuyere 15. The coke 16 is also used as a combustion gas for the heat exchanger 11 that heats the combustion air. Further, a hot air generator 11a for supplying hot air for drying to the spray dryer 10.
It is also used as a combustion gas. The dust in the exhaust gas removed by the Venturi scrubber 22 is contained in the circulating water, settled and concentrated by the thickener 5, and then further concentrated by the decanter 8, and then sent to the spray dryer 10 like the raw material slurry. , Becomes the raw material. The circulating water used for cooling the exhaust gas is cooled by the cooling tower 26 and sent to the venturi scrubber 22 again.

【0006】[0006]

【発明が解決しようとする課題】前記の従来技術では、
下記の問題点があった。 (1)炉頂からの排ガス集塵処理設備の建設費は莫大で
あり、かつ、運転費やメンテナンス費用の負荷も大き
い。 (2)炉頂からの排ガスは、散水され、冷却されるた
め、排ガス顕熱が未利用のまま、捨てられている。 (3)送風空気加熱用の熱風発生装置の建設費は莫大で
あり、かつ運転費やメンテナンス費用の負荷も大きい。
さらに、この熱風発生装置では熱源としての燃焼ガスと
して排ガスを消費する。 (4)スプレードライヤへの熱風製造用の熱風発生装置
の建設費が莫大であり、かつ運転費やメンテナンス費用
の負荷も大きい。さらに、該熱風発生装置では、熱源と
しての燃焼ガスとして排ガスを消費する。
In the above prior art,
There were the following problems. (1) The construction cost of the exhaust gas dust collection processing equipment from the furnace top is enormous, and the burden of operating costs and maintenance costs is also large. (2) Since the exhaust gas from the furnace top is sprinkled with water and cooled, the sensible heat of the exhaust gas is discarded without being used. (3) The construction cost of the hot air generator for heating the blast air is enormous, and the burden of operating costs and maintenance costs is large.
Furthermore, this hot air generator consumes exhaust gas as combustion gas as a heat source. (4) The construction cost of the hot air generator for producing hot air to the spray dryer is enormous, and the burden of operating costs and maintenance costs is large. Furthermore, in the hot air generator, exhaust gas is consumed as combustion gas as a heat source.

【0007】本発明は、前記の問題点を解決した、炉頂
排ガスの保有熱を有効に利用する技術を提供することを
目的とする。
It is an object of the present invention to provide a technique for effectively utilizing the heat retained in the furnace top exhaust gas, which solves the above problems.

【0008】[0008]

【課題を解決するための手段】本発明は、鉄鉱石等の有
効金属の酸化物を含む粉粒体を羽口から吹込み、溶融還
元し、金属を製造するコークス充填層型溶融還元炉にお
いて、前記問題点を解決するために、炉頂排ガス保有熱
の有効利用を図るもので、次の(イ)、(ロ)、(ハ)
の何れかの手段又はこれらを組合わせた技術手段を講じ
た装置を提供するものである。 (イ)竪型溶融還元炉の炉頂部に排ガス燃焼用の含酸素
気体供給装置を設置すると共に、炉頂部に炉頂ボイラを
設置し、排ガスの保有熱を水蒸気として回収する。 (ロ)排ガス管系に熱交換器を設置し、竪型溶融還元炉
に供給する燃焼用空気を排ガス顕熱で加熱する。 (ハ)排ガスをスプレードライヤに供給する排ガス管を
配設し、排ガス顕熱によりスプレードライヤに噴霧した
原料スラリーを乾燥させ、同時に排ガス中のダストを捕
集する。
The present invention is directed to a coke packed bed smelting reduction furnace for producing metal by injecting a powdery material containing an oxide of an effective metal such as iron ore from a tuyere and smelting and reducing it. In order to solve the above-mentioned problems, the heat of exhaust gas from the furnace top is effectively used. The following (a), (b), (c)
An apparatus using any one of the above means or technical means combining these means is provided. (A) An oxygen-containing gas supply device for exhaust gas combustion is installed at the top of the vertical smelting reduction furnace, and a furnace top boiler is installed at the top of the furnace to recover the heat of the exhaust gas as steam. (B) A heat exchanger is installed in the exhaust gas pipe system, and the combustion air supplied to the vertical smelting reduction furnace is heated by the exhaust gas sensible heat. (C) An exhaust gas pipe for supplying the exhaust gas to the spray dryer is provided, and the raw material slurry sprayed on the spray dryer by the sensible heat of the exhaust gas is dried, and at the same time, dust in the exhaust gas is collected.

【0009】[0009]

【作用】本発明の構成とその作用を図1により以下に説
明する。竪型溶融還元炉14の排ガスを炉頂部に設けら
れた供給ヘッダ34から吹込まれたO2 、空気又は酸素
富化空気により、2次燃焼させ、炉頂部の排ガス温度を
上昇させる。炉頂部には炉頂ボイラ27を設け、蒸気回
収用ボイラチューブが壁面及び煙道内に配設され燃焼排
ガス顕熱を効率よく蒸気として回収する。発生した高温
高圧蒸気は、蒸気ヘッダ28に集められ、タービン29
を回転させて発電し、復水器33で復水し、復水タンク
30を通ってポンプ35により再びボイラチューブに送
水される。
The structure and operation of the present invention will be described below with reference to FIG. The exhaust gas of the vertical smelting reduction furnace 14 is secondarily burned by O 2 , air or oxygen-enriched air blown from the supply header 34 provided at the furnace top, and the exhaust gas temperature at the furnace top is raised. A furnace top boiler 27 is provided at the furnace top, and a steam recovery boiler tube is disposed on the wall surface and inside the flue to efficiently recover the sensible heat of the combustion exhaust gas as steam. The generated high-temperature and high-pressure steam is collected in the steam header 28, and the turbine 29
Is rotated to generate electric power, condensate water in the condenser 33, and is again fed to the boiler tube by the pump 35 through the condensate tank 30.

【0010】また、炉頂部から排出されたガスは新設し
た熱交換器11に送気し竪型溶融還元炉の送風機20よ
り送風された冷風を加熱昇温させて、排ガス顕熱を回収
し、有効利用する。さらに、熱交換器11から出た排ガ
スは原料乾燥用スプレードライヤ10に送られ、原料乾
燥用熱源として使用され、かつ、集塵機12を通って除
塵され、含塵量の少ない低温排ガスとなり、排ガスファ
ン31,煙突32より系外に排出される。
Further, the gas discharged from the furnace top is sent to a newly installed heat exchanger 11 to heat and raise the temperature of the cold air blown from the blower 20 of the vertical smelting reduction furnace to recover the sensible heat of the exhaust gas. Make effective use. Further, the exhaust gas emitted from the heat exchanger 11 is sent to the spray dryer 10 for drying the raw material, used as a heat source for drying the raw material, and dust-removed through the dust collector 12 to become a low-temperature exhaust gas with a small dust content, and an exhaust gas fan. It is discharged from the system 31 and the chimney 32 to the outside of the system.

【0011】[0011]

【実施例】本発明の実施例を図1のプロセスフロー図に
よって以下に説明する。他部門で発生したスラリー状の
原料粉がシックナ23に供給され、デカンタ8に送ら
れ、脱水、濃縮された後、スプレードライヤ10内に噴
霧することは図2と同様である。
Embodiments of the present invention will be described below with reference to the process flow diagram of FIG. The slurry-like raw material powder generated in another department is supplied to the thickener 23, sent to the decanter 8, dewatered and concentrated, and then sprayed in the spray dryer 10 as in FIG.

【0012】実施例では、竪型溶融還元炉14から排出
した排ガスは炉頂部でO2 、空気又は酸素富化空気供給
ヘッダ34から供給された酸素により2次燃焼し炉頂ボ
イラ27を加熱し、蒸気を発生させる。高温の排ガスは
送風用空気加熱用熱交換器11に送られ、熱交換する。
高温の排ガスは次にスプレードライヤ10に供給され
る。
In the embodiment, the exhaust gas discharged from the vertical smelting reduction furnace 14 is secondarily combusted at the furnace top by O 2 , air or oxygen supplied from the oxygen-enriched air supply header 34 to heat the furnace top boiler 27. , Generate steam. The high-temperature exhaust gas is sent to the air heating heat exchanger 11 for blowing air to exchange heat.
The hot exhaust gas is then supplied to the spray dryer 10.

【0013】スプレードライヤ10内では、噴霧された
スラリー状の原料粉が高温の排ガスにより乾燥され乾燥
原料粉となり、排ガス中のダストを吸着、捕集し、スプ
レードライヤ10の底部に堆積する。スプレードライヤ
10を通過した排ガスは次の集塵機12で更に除塵され
た後、吸引ファン31、煙突32を通って、系外に排出
される。
In the spray dryer 10, the sprayed slurry-like raw material powder is dried by the high temperature exhaust gas to become a dry raw material powder, which adsorbs and collects dust in the exhaust gas and deposits it on the bottom of the spray dryer 10. The exhaust gas that has passed through the spray dryer 10 is further dust-removed by the next dust collector 12, and then discharged through the suction fan 31 and the chimney 32 to the outside of the system.

【0014】スプレードライヤ10と集塵機12の底部
に堆積した乾燥した原料粉とダストは下部より抜き取
り、貯槽13に装入した後、均排圧ホッパ18とインジ
ェクションタンク25を通り、羽口15より竪型溶融還
元炉14内に吹込まれる。本発明は、上記のようなプロ
セスにしたことにより、炉頂ボイラ27で、高温の排ガ
ス顕熱を有効利用して、蒸気を発生させ、タービン29
により、発電することができる。また2次燃焼させてい
るため、排ガス中のCOガス等の燃焼成分がないので、
スプレードライヤ10で乾燥用熱源として利用した後系
外に排気することができる。
The dry raw material powder and dust accumulated on the bottoms of the spray dryer 10 and the dust collector 12 are extracted from the lower part, charged into the storage tank 13, passed through the pressure equalizing hopper 18 and the injection tank 25, and passed through the tuyere 15 from the vertical. It is blown into the mold smelting reduction furnace 14. According to the present invention, the above-described process allows the furnace top boiler 27 to effectively utilize the high-temperature exhaust gas sensible heat to generate steam, and the turbine 29
With this, power can be generated. Also, since the secondary combustion is performed, there is no combustion component such as CO gas in the exhaust gas,
After being used as a heat source for drying by the spray dryer 10, it can be exhausted to the outside of the system.

【0015】竪型溶融還元炉14から排出した排ガスの
温度は炉頂部で約750℃(最高約900℃)で、排ガ
ス量は26000Nm3 /Hを示し、含塵濃度は約30
〜50g/Nm3 の範囲にあった。炉頂排ガス成分は、
CO:52.6%、CO2 :0.9%、H2 :2.3
%、N2 :44.2%であり、炉頂排ガスカロリーは、
1,480kcal/Nm3 であった。
The temperature of the exhaust gas discharged from the vertical smelting reduction furnace 14 is about 750 ° C. (maximum about 900 ° C.) at the furnace top, the amount of exhaust gas is 26000 Nm 3 / H, and the dust concentration is about 30.
It was in the range of up to 50 g / Nm 3 . The top exhaust gas component is
CO: 52.6%, CO 2: 0.9%, H 2: 2.3
%, N 2 : 44.2%, and the furnace top exhaust gas calorie is
It was 1,480 kcal / Nm 3 .

【0016】この排ガスは炉頂部で2次燃焼し炉頂ボイ
ラ27を加熱し、蒸気を発生させる。高温高圧の蒸気は
蒸気ヘッダ28を通ってタービン29により、電力を発
生したのち、復水タンク30から再びボイラに給水され
る。一方、2次燃焼後の排ガスは送風機20より送られ
る送風用空気を加熱する送風用熱交換器11に入り、送
風用空気を約80℃から480℃まで昇熱したのち、約
450℃排ガスとなる。この排ガスは、スプレードライ
ヤ10に送られ、スプレードライヤ10内に噴霧した約
2100kg/H(含水率約50%)のスラリー状の原
料粉を乾燥し、温度が約180℃以下に低下した。ま
た、排ガスは次の集塵機12で約0.5mg/Nm3
で良好に除塵された。
This exhaust gas is secondarily burned at the furnace top to heat the furnace top boiler 27 and generate steam. The high-temperature and high-pressure steam passes through the steam header 28 to generate electric power by the turbine 29, and is then supplied to the boiler from the condensate tank 30 again. On the other hand, the exhaust gas after the secondary combustion enters the blast heat exchanger 11 that heats the blast air sent from the blower 20, heats the blast air from about 80 ° C. to 480 ° C., and then converts it to about 450 ° C. exhaust gas. Become. The exhaust gas was sent to the spray dryer 10 to dry the slurry-like raw material powder of about 2100 kg / H (water content about 50%) sprayed in the spray dryer 10, and the temperature dropped to about 180 ° C. or lower. Further, the exhaust gas was satisfactorily removed by the next dust collector 12 to about 0.5 mg / Nm 3 .

【0017】一方、スプレードライヤ10及び集塵機1
2で捕集した乾燥原料粉とダストは下部より抜き取り貯
槽13に装入した後均排圧ホッパ18とインジェクショ
ンタンク25を通し、羽口15より竪型溶融還元炉14
に吹込み、問題なく操業を行った。
On the other hand, the spray dryer 10 and the dust collector 1
The dry raw material powder and dust collected in 2 are withdrawn from the lower part and charged into a storage tank 13 and then passed through a pressure equalizing hopper 18 and an injection tank 25, and a tuyere 15 is used for vertical smelting reduction furnace 14
And operated without problems.

【0018】[0018]

【発明の効果】本発明によれば、コークス充填層型溶融
還元炉から排出する高温の排ガスを炉頂で2次燃焼さ
せ、その顕熱を炉頂ボイラにより、蒸気化して、タービ
ンにより電力として回収することができた。さらに、高
温の排ガスを送風用空気の予熱に利用し送風用空気が加
熱装置で消費される燃焼用ガス量を低減させることがで
きた。
According to the present invention, the high-temperature exhaust gas discharged from the coke packed bed smelting reduction furnace is secondarily burned at the furnace top, and the sensible heat thereof is vaporized by the furnace top boiler and converted into electric power by the turbine. I was able to recover it. Furthermore, the high-temperature exhaust gas was used for preheating the blast air, and the amount of combustion gas consumed by the blast air in the heating device could be reduced.

【0019】高温の排ガスを乾燥機に直接供給し、排ガ
スの顕熱をスラリー状の原料粉の乾燥用熱源として利用
したことにより原料粉の乾燥と排熱回収が良好に行われ
た。また、排ガス中のダストを良好に捕集することがで
きた。このため、原料粉を乾燥するための別途の熱源も
不要となる。また、排ガス中のダストは原料粉に吸着さ
れ、これと共に排出されるので粉塵処理のためのシステ
ムが不要となる。上記の結果、本発明の実施により、従
来のプロセスでは必要であった、サイクロン、ベンチュ
リスクラバ、シックナ等の排ガス処理設備が不要になっ
た。また、ガス本管、ガス貯蔵設備及びガス有効利用装
置が不要となり、本プロセス内で発生するエネルギーを
クローズドサーキットで利用することができた。また、
それらの設備の運転費とメンテナンス費、回収したダス
トの輸送費等が不要となった。
The high-temperature exhaust gas was directly supplied to the dryer, and the sensible heat of the exhaust gas was used as a heat source for drying the slurry-like raw material powder, whereby the raw material powder was dried and exhaust heat was recovered well. Further, the dust in the exhaust gas could be collected well. Therefore, a separate heat source for drying the raw material powder is unnecessary. Further, since the dust in the exhaust gas is adsorbed by the raw material powder and discharged together with it, a system for dust treatment is not required. As a result, the implementation of the present invention eliminates the need for exhaust gas treatment equipment such as cyclones, venturi scrubbers, thickeners, etc., which were required in conventional processes. In addition, the gas main, gas storage equipment, and gas effective utilization device are not required, and the energy generated in this process can be used in the closed circuit. Also,
The operating costs and maintenance costs for those facilities and transportation costs for the collected dust are no longer required.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の実施例のプロセスを示すフロー図であ
る。
FIG. 1 is a flow diagram showing the process of an embodiment of the present invention.

【図2】従来のプロセスを示すフロー図である。FIG. 2 is a flow chart showing a conventional process.

【符号の説明】[Explanation of symbols]

5 シックナ 6 煙突 7 ガス本管 8 デカンタ 10 スプレードライヤ 11 熱交換器 11a、11b 熱風発生装置 12 集塵機 13 貯槽 14 溶融還元炉 15 羽口 16 コークス 17 サイクロン 18 均排圧ホッパ 20 送風機 21 金属 22 ベンチュリ
ースクラバ 23 シックナ 24 デカンタ 25 インジェクションタンク 26 冷却塔 27 炉頂ボイラ 28 蒸気ヘッダ 29 タービン 30 復水タンク 31 ファン 32 煙突 33 復水器 34 供給ヘッダ 35 ポンプ
5 Thickener 6 Chimney 7 Gas main 8 Decanter 10 Spray dryer 11 Heat exchanger 11a, 11b Hot air generator 12 Dust collector 13 Storage tank 14 Smelting reduction furnace 15 Tuyere 16 Coke 17 Cyclone 18 Uniform discharge hopper 20 Blower 21 Metal 22 Venturi Cla 23 Thickener 24 Decanter 25 Injection tank 26 Cooling tower 27 Top boiler 28 Steam header 29 Turbine 30 Condensate tank 31 Fan 32 Chimney 33 Condenser 34 Supply header 35 Pump

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 鉄鉱石等の有効金属の酸化物を含む粉粒
体を羽口から吹込み、溶融還元し、金属を製造するコー
クス充填層型溶融還元炉において、竪型溶融還元炉の炉
頂部に排ガス燃焼用の含酸素気体供給装置を設置すると
共に、炉頂部に炉頂ボイラを設置したことを特徴とする
コークス充填層型溶融還元炉の炉頂排ガス保有熱の有効
利用装置。
1. A coke-filled bed type smelting reduction furnace for producing metal by injecting a powder or granular material containing an oxide of an effective metal such as iron ore from a tuyere to smelt and reduce the smelting reduction furnace, which is a vertical smelting reduction furnace. An apparatus for effectively utilizing the heat of exhaust gas from the top of a coke packed bed type smelting reduction furnace, characterized in that an oxygen-containing gas supply device for exhaust gas combustion is installed at the top and a furnace boiler is installed at the top of the furnace.
【請求項2】 排ガス管系内に、竪型溶融還元炉に供給
する燃焼用空気を加熱する熱交換器を設置したことを特
徴とするコークス充填層型溶融還元炉の炉頂排ガス保有
熱の有効利用装置。
2. A coke-packed bed type smelting reduction furnace has a heat exchanger for heating the combustion gas supplied to the vertical smelting reduction furnace in the exhaust gas pipe system. Effective utilization device.
【請求項3】 排ガスをスプレードライヤに供給する連
絡管を設けたことを特徴とするコークス充填層型溶融還
元炉の炉頂排ガス保有熱の有効利用装置。
3. An apparatus for effectively utilizing the heat of exhaust gas held at the top of a coke packed bed type smelting reduction furnace, which is provided with a connecting pipe for supplying the exhaust gas to a spray dryer.
【請求項4】 排ガス管系内に、竪型溶融還元炉に供給
する燃焼用空気を加熱する熱交換器を設置し、又は/及
び排ガスをスプレードライヤに供給する連絡ガス管を設
けたことを特徴とする請求項1記載のコークス充填層型
溶融還元炉の炉頂排ガス保有熱の有効利用装置。
4. A heat exchanger for heating combustion air supplied to a vertical smelting reduction furnace is installed in the exhaust gas pipe system, and / or a connecting gas pipe for supplying exhaust gas to a spray dryer is provided. The apparatus for effectively utilizing the heat of exhaust gas retained at the top of the coke packed bed smelting reduction furnace according to claim 1.
JP29153392A 1992-10-29 1992-10-29 Device for effectively utilizing heat retained in furnace top waste gas of coke packed bed type smelting reduction furnace Withdrawn JPH06136421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29153392A JPH06136421A (en) 1992-10-29 1992-10-29 Device for effectively utilizing heat retained in furnace top waste gas of coke packed bed type smelting reduction furnace

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29153392A JPH06136421A (en) 1992-10-29 1992-10-29 Device for effectively utilizing heat retained in furnace top waste gas of coke packed bed type smelting reduction furnace

Publications (1)

Publication Number Publication Date
JPH06136421A true JPH06136421A (en) 1994-05-17

Family

ID=17770139

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29153392A Withdrawn JPH06136421A (en) 1992-10-29 1992-10-29 Device for effectively utilizing heat retained in furnace top waste gas of coke packed bed type smelting reduction furnace

Country Status (1)

Country Link
JP (1) JPH06136421A (en)

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