JPH10204514A - Apparatus for producing reduced iron - Google Patents

Apparatus for producing reduced iron

Info

Publication number
JPH10204514A
JPH10204514A JP620997A JP620997A JPH10204514A JP H10204514 A JPH10204514 A JP H10204514A JP 620997 A JP620997 A JP 620997A JP 620997 A JP620997 A JP 620997A JP H10204514 A JPH10204514 A JP H10204514A
Authority
JP
Japan
Prior art keywords
stage
heating
reduced
processed
reduced iron
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
Application number
JP620997A
Other languages
Japanese (ja)
Inventor
Hironori Fujioka
宏規 藤岡
Koichi Hirata
耕一 平田
Hiroshi Nakajima
宏 中嶋
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP620997A priority Critical patent/JPH10204514A/en
Publication of JPH10204514A publication Critical patent/JPH10204514A/en
Pending legal-status Critical Current

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  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Manufacture Of Iron (AREA)
  • Tunnel Furnaces (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a reduced iron producing apparatus having small setting area and good profitability by constituting the inner part of a reducing furnace with many steps. SOLUTION: Rotary furnace hearths (grates) 22-24 in the reducing furnace are constituted by dividing into three steps and piling. Treating material 10 composed of iron ore powder containing coal is charged from a charging hole 21 at the upper step and carried to the lower step through ducts 31, 32 by rotating while heating at each step, and the reduced material 10 is taken out from the lower step with an ejector 8. High temp. gas from a combustion burner 3 arranged at the lower step is used to heating and reducing action of the treating material 10 and this high temp. exhaust gas is introduced to the upper step so as to utilize to heating at each step.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、サーキュラ型の回
転炉床上に石炭を含む鉄鉱石粉から成る被処理体を載置
し、同被処理体を高温雰囲気中にて還元させる還元鉄製
造装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing reduced iron in which an object made of iron ore powder containing coal is placed on a circular rotary hearth and the object is reduced in a high-temperature atmosphere. .

【0002】[0002]

【従来の技術】図4,5は、従来の還元鉄製造装置の一
例を示す説明図である。図4は還元鉄製造装置の平面
図、図5は図4のV−V矢視断面図である。
2. Description of the Related Art FIGS. 4 and 5 are explanatory views showing an example of a conventional reduced iron production apparatus. FIG. 4 is a plan view of the reduced iron manufacturing apparatus, and FIG. 5 is a sectional view taken along the line VV of FIG.

【0003】図4に示すように、円形状の還元炉1は、
上部に被処理体の投入口11及び加熱ガスの排気ダクト
9が設けられ、内部には被処理体のペレット敷詰め装置
12及び被処理体の排出機8が配置され、回転炉床が2
〜10rphのゆっくりした速度で点線矢印の方向に旋
回しながら、被処理体がA〜B間で予熱され、B〜C間
で加熱され還元反応が生じ、C〜D間で還元反応が完結
し略1回転後に排出機8から排出される。
As shown in FIG. 4, a circular reduction furnace 1 is
An inlet 11 for the object to be processed and an exhaust duct 9 for heated gas are provided at an upper portion, and a pellet laying device 12 for the object to be processed and a discharger 8 for the object to be processed are arranged therein.
The object to be processed is preheated between A and B, heated between B and C, and a reduction reaction occurs while turning at a slow speed of 10 to 10 rph in the direction of the dotted arrow, and the reduction reaction is completed between C and D. It is discharged from the discharger 8 after approximately one rotation.

【0004】還元炉1の炉壁6内は、図5に示すよう
に、回転炉床2の上には、上記投入口11から投入され
たペレット状の被処理体10が、ペレット敷詰め装置1
2によって複数層(1〜3層)に敷詰められる。そし
て、炉壁6内の複数個所に配置された燃焼バーナ3から
の高温ガスの輻射熱によって、被処理体10が加熱され
還元反応が生じるようになっている。
As shown in FIG. 5, inside the furnace wall 6 of the reduction furnace 1, a pellet-shaped workpiece 10 charged from the charging port 11 is placed on the rotary hearth 2 in a pellet filling apparatus. 1
2 lays down a plurality of layers (1 to 3 layers). The object to be processed 10 is heated by the radiant heat of the high-temperature gas from the combustion burners 3 arranged at a plurality of locations in the furnace wall 6 to cause a reduction reaction.

【0005】一方、回転炉床2はレール4を介して駆動
輪5によって駆動され、図4の点線矢印の方向にゆっく
り旋回するようになっており、回転炉床2の炉壁6側
は、高温ガスのシール装置7が設けられている。
On the other hand, the rotary hearth 2 is driven by a driving wheel 5 via a rail 4 and slowly turns in the direction of a dotted arrow in FIG. A hot gas sealing device 7 is provided.

【0006】なお、上記被処理体10は、粉状又は粒状
の鉄鉱石に石炭が加えられ、バインダーとを混合して1
0〜20mmφのペレット状に固められたものである。
[0006] The object 10 is prepared by adding coal to powdery or granular iron ore and mixing it with a binder.
It is solidified into a pellet of 0 to 20 mmφ.

【0007】上記のような還元鉄製造装置においては、
投入口11から連続的に投入される被処理体10が、回
転炉床2上に載ってゆっくり旋回しながら、同一平面内
で加熱、還元反応が行われる。
In the apparatus for producing reduced iron as described above,
The object 10 continuously charged from the charging port 11 is heated and reduced in the same plane while rotating slowly on the rotary hearth 2.

【0008】[0008]

【発明が解決しようとする課題】上記のような従来の還
元鉄製造装置では、次のような問題点があった。 (1)同一平面内で加熱、還元反応が行われる装置であ
るため、被処理体の生産量を増加したい場合には、還元
炉が大径化してしまい、設置面積がさらに大きくなると
いう問題があった。
However, the above-mentioned conventional reduced iron manufacturing apparatus has the following problems. (1) Since the heating and reduction reactions are performed in the same plane, when the production amount of the object to be processed is to be increased, the diameter of the reduction furnace is increased, and the installation area is further increased. there were.

【0009】(2)還元炉が大型化することによって、
駆動装置等も大型化し、全体的に装置重量が増加し、経
済性が悪くなる欠点があった。
(2) As the reduction furnace becomes larger,
The driving device and the like also become large, and the weight of the device as a whole increases.

【0010】本発明は、従来の還元鉄製造装置における
不具合点を解消し、還元炉内を多段に構成することによ
って装置の設置面積が小さく、経済性の良い還元鉄製造
装置を提供することを目的としている。
An object of the present invention is to provide a reduced-iron manufacturing apparatus which solves the problems of the conventional reduced-iron manufacturing apparatus and has a reduced installation area and a good economical efficiency by configuring the reduction furnace in multiple stages. The purpose is.

【0011】[0011]

【課題を解決するための手段】この目的を達成するた
め、本発明においては、円形状の還元炉内を旋回する回
転炉床上に石炭を含む鉄鉱石粉から成る被処理体を載置
し、同被処理体を高温雰囲気中にて加熱、還元し鉄分を
得る還元鉄製造装置であって、前記還元炉内を旋回する
回転炉床を上下方向の複数段に積み重ねて構成し、最上
段には被処理体を投入する投入手段を設け、各段では回
転炉床上で被処理体を加熱すると共に下段への搬送手段
を設け、最下段にには還元された被処理体を排出する排
出手段を設けて構成したものである。
In order to achieve this object, in the present invention, a workpiece made of iron ore powder containing coal is placed on a rotary hearth swirling in a circular reduction furnace. A reduced iron manufacturing apparatus for heating an object to be processed in a high-temperature atmosphere to obtain an iron component by reducing the iron core, wherein a rotary hearth rotating in the reduction furnace is stacked in a plurality of vertical stages, and the uppermost stage includes Providing charging means for charging the processing object, heating means on the rotary hearth at each stage, and providing conveying means to the lower stage, and discharging means for discharging the reduced processing object at the lowest stage. It is provided and configured.

【0012】また、前記最下段には被処理体を加熱する
燃焼装置を設け、最下段より上の段では最下段で発生し
た燃焼ガスを上段に導入することによって被処理体を加
熱するように構成したものである。
Further, a combustion device for heating the object to be processed is provided at the lowermost stage, and at a stage above the lowermost stage, the combustion gas generated at the lowermost stage is introduced into the upper stage to heat the object to be processed. It is composed.

【0013】また、上段と下段を区切り排出ガスの通路
となる部分に、多孔材の輻射熱変換体あるいは同輻射熱
変換体に触媒をコーティングした燃焼触媒体を具えて構
成したものである。
[0013] Further, the present invention is configured such that a portion of the upper stage and the lower stage which serves as an exhaust gas passage is provided with a radiant heat converter made of porous material or a combustion catalyzer in which the radiant heat converter is coated with a catalyst.

【0014】[作用]本発明の還元鉄製造装置によれ
ば、円形状の還元炉内を旋回する回転炉床が、複数段に
積み重ねて構成されており、まず、ペレット状の被処理
体が最上段の投入口から回転炉床上に投入されると、被
処理体を載せた回転炉床がゆっくり旋回しながら加熱ガ
スによって加熱され、略1回転した位置から下段へ搬送
される。同段では、上記と同様に回転炉床がゆっくり旋
回しながらさらに加熱ガスによって加熱され、略1回転
した位置から次の下段へ搬送される。このようにして、
最下段に搬送された回転炉床上の被処理体は、ゆっくり
旋回しながら高温ガス雰囲気中で輻射熱を受けて還元反
応を完結させた後、略1回転した位置から搬送手段によ
って被処理体が排出される。
[Operation] According to the apparatus for producing reduced iron of the present invention, the rotary hearth revolving in the circular reduction furnace is formed by stacking a plurality of stages. When the object is placed on the rotary hearth through the inlet at the top, the rotary hearth on which the object is placed is heated by the heating gas while rotating slowly, and is conveyed to the lower part from the position where it is rotated substantially one turn. At the same stage, the rotary hearth is further heated by the heating gas while being slowly swirled in the same manner as described above, and is conveyed to the next lower stage from the position where it has been rotated substantially once. In this way,
The object to be processed on the rotary hearth transported to the lowermost stage receives radiant heat in a high-temperature gas atmosphere while rotating slowly to complete the reduction reaction, and then the object to be processed is discharged by the transport means from a position substantially rotated once. Is done.

【0015】また、最下段に設けられた燃焼装置からの
高温ガスの輻射熱によって被処理体を加熱し、還元反応
を起こさせる。そして、この最下段で使用され排気され
る高温ガスは、最下段から上段へ導入し、上段の被処理
体を加熱することによって熱エネルギーを有効に利用し
経済性を高めることができる。
Further, the object to be processed is heated by radiant heat of the high-temperature gas from the combustion device provided at the lowermost stage to cause a reduction reaction. The high-temperature gas used and exhausted at the lowermost stage is introduced from the lowermost stage to the upper stage, and by heating the object to be processed at the upper stage, the thermal energy can be effectively used and the economy can be improved.

【0016】また、上段と下段を区切り排出ガスの通路
となる部分に、多孔材の輻射熱変換体あるいは燃焼触媒
体を介装したので、最下段から排気される可燃分を有す
る高温ガスは、輻射熱変換体あるいは燃焼触媒体を通過
することによって輻射熱変換あるいは燃焼を行ない、熱
エネルギーを効率よく被処理体へ供給することができ
る。
Further, since a radiant heat converter or a combustion catalyst made of a porous material is interposed in a portion which separates the upper stage from the lower stage and serves as an exhaust gas passage, the high-temperature gas having a combustible component discharged from the lowermost stage emits radiant heat. Radiation heat conversion or combustion is performed by passing through the converter or the combustion catalyst, and heat energy can be efficiently supplied to the object.

【0017】[0017]

【発明の実施の形態】以下、本発明を実施例により詳細
に説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments.

【0018】[実施例] [構成]図1は本発明の一実施例を示す還元鉄製造装置
の縦断面図、図2は図1の要部説明図、図3は還元鉄製
造装置の斜視図である。従来例の図4,5と同一部分に
は同一符号を付し、重複する説明は省略する。
Embodiment [Configuration] FIG. 1 is a longitudinal sectional view of an apparatus for producing reduced iron according to an embodiment of the present invention, FIG. 2 is an explanatory view of a main part of FIG. 1, and FIG. FIG. The same parts as those in FIGS. 4 and 5 of the conventional example are denoted by the same reference numerals, and overlapping description will be omitted.

【0019】本発明の還元鉄製造装置は、全体構成が図
3の斜視図に示すようになっており、還元炉内の回転炉
床(グレード)を、3段に分けて積み重ねて構成したも
ので、上段から被処理体を投入し、各段で加熱しながら
旋回して下段へ搬送し、下段から還元された被処理体を
取り出すようになっており、下段に設けられた燃焼バー
ナからの高温ガスによって被処理体を加熱、還元反応に
使用し、その高温の排気ガスを上の段に導入して各段で
加熱に利用できるようにしたものである。なお、ここで
いう被処理体は、粉上又は粒状の鉄鉱石に石炭が加えら
れ、バインダーとを混合して10〜20mmφペレット
上に固めたものである。
The reduced iron manufacturing apparatus of the present invention has an overall configuration as shown in a perspective view of FIG. 3, and is constituted by stacking rotary hearths (grades) in a reduction furnace in three stages. Then, the object to be processed is put in from the upper stage, and while being heated in each stage, it is rotated and conveyed to the lower stage, and the reduced object to be processed is taken out from the lower stage, and from the combustion burner provided in the lower stage, The object to be processed is heated and reduced by a high-temperature gas, and the high-temperature exhaust gas is introduced into an upper stage so that it can be used for heating in each stage. Note that the object to be treated here is obtained by adding coal to powder or granular iron ore, mixing with a binder, and solidifying the mixture on a 10 to 20 mmφ pellet.

【0020】図1に示すように、21は上段L3の天井
部に設けられた被処理体10の投入口(投入手段)、2
2は還元炉20の上段L3に配置された上段グレード
で、分割受皿が連続した形状の回転炉床として、被処理
体10を載せて還元炉20内をゆっくりした速度で旋回
できるようになっている。23は還元炉20の中断L2
に配置された中断グレードで、前記上段グレード22と
略同じ構成になっている。24は還元炉20の下段L1
に配置された下段グレードで、下部にはレール4が取着
され、同レール4の下側には駆動輪5が配置され、この
駆動輪5にレール4が乗って旋回できるようになってお
り、下段グレード24に被処理体10を載せて下段L1
内をゆっくりした速度で旋回できるようになっている。
また、下段L1の炉壁には燃焼バーナ3が複数個所に取
着されている。
As shown in FIG. 1, reference numeral 21 denotes an input port (input means) of the object 10 provided on the ceiling of the upper stage L3;
Reference numeral 2 denotes an upper grade disposed in the upper stage L3 of the reduction furnace 20, which is a rotary hearth having a continuous shape of a divided saucer so that the object to be processed 10 can be placed and the inside of the reduction furnace 20 can be rotated at a slow speed. I have. 23 is the interruption L2 of the reduction furnace 20
And has substantially the same configuration as the upper grade 22. 24 is the lower stage L1 of the reduction furnace 20
A rail 4 is attached to the lower part, and a drive wheel 5 is disposed below the rail 4 so that the rail 4 can turn on the drive wheel 5. The object 10 is placed on the lower grade 24, and the lower
You can turn at a slow speed inside.
Further, the combustion burners 3 are attached to a plurality of places on the furnace wall of the lower stage L1.

【0021】25は上段グレード22又は中断グレード
23の下部に取着された支持材で、両端部が旋回用のレ
ール4に回動可能に固定され、同レール4の下側には駆
動輪5が配置されており、この駆動輪5にレール4が乗
って旋回できるようになっている。なお、前記支持材2
5は後述するグレードの所定の旋回位置で図示しない所
定の回動手段により回動されてグレード(分割受皿の一
つ)を傾け、同グレード上の被処理体10を下方床板に
設けたシュート(搬送手段)を介して下段のグレードへ
搬送するようになっている。
Reference numeral 25 denotes a support member attached to the lower part of the upper grade 22 or the suspended grade 23. Both ends are rotatably fixed to the turning rail 4, and the driving wheel 5 is provided below the rail 4. Are arranged, and the rail 4 can be turned on the drive wheel 5 so as to be able to turn. The support 2
Reference numeral 5 denotes a chute in which a grade (one of the divided trays) is tilted by a predetermined turning means (not shown) at a predetermined turning position of the grade to be described later, and the object 10 on the same grade is provided on a lower floor plate. Via the transfer means) to the lower grade.

【0022】26は上段L3の下部又は中断L2の下部
に配置された床板で、同床板26には下方からの加熱ガ
スの導入孔27が多数設けられている。そして、この導
入孔27には、網目状、ハニカム状等の多孔材から成る
輻射熱変換体あるいは同輻射熱変換体に白金等の触媒を
コーティングした燃焼触媒体が介装されている。
Reference numeral 26 denotes a floor plate disposed below the upper stage L3 or below the interruption L2. The floor plate 26 has a large number of holes 27 for introducing a heating gas from below. A radiation heat converter made of a porous material such as a mesh or a honeycomb, or a combustion catalyst obtained by coating the radiation heat converter with a catalyst such as platinum is interposed in the introduction hole 27.

【0023】31は上段グレード22からの被処理体1
0を中段グレード23へ搬送する下降シュートで、床板
26の一部が傾斜して形成されている。32は中段グレ
ード23からの被処理体10を下段グレード24へ搬送
する下降シュートで、床板26の一部が傾斜して形成さ
れている。
Reference numeral 31 denotes the object 1 from the upper grade 22
This is a descending chute that transports 0 to the middle grade 23, and a part of the floor plate 26 is formed to be inclined. Reference numeral 32 denotes a descending chute for transporting the object 10 from the middle grade 23 to the lower grade 24, and a part of the floor plate 26 is formed to be inclined.

【0024】そして、下段グレード24には排出機(排
出手段)8が設けられて、還元反応が完結した被処理体
10を装置外のホッパー28を経て次工程へ排出するよ
うになっている。
The lower grade 24 is provided with a discharger (discharge means) 8 for discharging the target object 10 after the reduction reaction is completed to a next step via a hopper 28 outside the apparatus.

【0025】下段L1に設けられた燃焼バーナ3からの
高温ガスは、下段L1、中段L2、上段L3で加熱、還
元反応に利用された後、上段L3の上部から排気ダクト
9へ吸引されて、系外へ排気されている。
The high-temperature gas from the combustion burner 3 provided in the lower stage L1 is used for heating and reduction reactions in the lower stage L1, the middle stage L2, and the upper stage L3, and then is drawn into the exhaust duct 9 from above the upper stage L3. Exhausted outside the system.

【0026】図2は、各段のグレード22〜24に載せ
られ加熱される被処理体10の状態を示したもので、下
段グレード24には被処理体10が略1層に並べられ、
燃焼バーナ3からの輻射熱が十分伝わるように配慮さ
れ、中段グレード23には被処理体10が略2層に並べ
られ、上段グレード22には被処理体10が略3層に並
べられて下方からの加熱ガスによって加熱されており、
被処理体10の供給量と排出量が同一とすれば、各段の
グレード22〜24の回転数によって、各段のグレード
に並べられる層数が決まってくるものである。
FIG. 2 shows the state of the object 10 to be placed and heated on each of the grades 22 to 24 in the respective stages.
Considering that the radiant heat from the combustion burner 3 is sufficiently transmitted, the workpieces 10 are arranged in approximately two layers in the middle grade 23, and the workpieces 10 are arranged in substantially three layers in the upper grade 22 from below. Heated by the heating gas of
If the supply amount and discharge amount of the object 10 are the same, the number of layers arranged in each grade depends on the number of rotations of the grades 22 to 24 in each grade.

【0027】[実験例1]実験例1を次に示す。 グレードサイズ ; 中心径D=3m、 幅W=0.3m 3段型サーキュラーグレード ; 上段L3=0.8m 中段L2=1.0m 下段L1=1.5m グレードの回転数 ; 上段3.3rph、中段5rph、下段10rph 被処理体の投入速度 ; 40kg/h 被処理体 ; 鉄鉱石粉78%、石炭18%、バインダー4%から成る1 5φmmの球体 燃焼バーナ ; LPGバーナ × 下段に10箇所 炉内雰囲気温度; 上段500℃、中段1000℃、下段1300℃ この条件での実験によると、上段の投入口から投入され
た被処理体は、各段にて加熱、還元反応され下段から排
出されると、還元率90%以上になったペレットとして
取り出され、経済性の高い還元鉄製造装置であることが
確認された。
[Experiment 1] Experiment 1 is shown below. Grade size; center diameter D = 3m, width W = 0.3m 3-stage circular grade; upper stage L3 = 0.8m middle stage L2 = 1.0m lower stage L1 = 1.5m Grade rotation speed; upper stage 3.3rph, middle stage 5 rph, lower stage 10 rph Input speed of the object to be processed; 40 kg / h object to be processed: 15 mm spherical body composed of 78% of iron ore powder, 18% of coal, and 4% of binder Burning burner; LPG burner × 10 places in lower stage Furnace atmosphere temperature According to the experiment under these conditions, the object to be processed introduced from the upper inlet is heated and reduced in each stage and discharged from the lower stage. The pellets were taken out as pellets having a ratio of 90% or more, and it was confirmed that the reduced iron production apparatus was highly economical.

【0028】[実験例2]実験例2を次に示す。 グレードサイズ ; 中心径D=20m × 幅W=4.4m 3段型サーキュラーグレード ; 上段L3=0.8m 中段L2=1.0m 下段L1=1.5m グレードの回転数 ; 上段4rph、中段6rph、下段12rph 被処理体の投入速度 ; 1000kg/min 被処理体 ; 鉄鉱石粉78%、石炭18%、バインダー4%から成る1 5〜20φmmの球体 燃焼バーナ ; 微粉炭焚きバーナ × 下段に10箇所 炉内雰囲気温度; 上段500℃、中段1000℃、下段1300℃ この条件での実験によると、上段の投入口から投入され
た被処理体は、各段にて加熱、還元反応され下段から排
出されると、還元率90%以上になったペレットとして
取り出され、経済性の高い還元鉄製造装置であることが
確認された。
[Experimental example 2] Experimental example 2 is shown below. Grade size; center diameter D = 20 m × width W = 4.4 m 3-stage circular grade; upper stage L3 = 0.8 m middle stage L2 = 1.0 m lower stage L1 = 1.5 m Grade rotation speed; upper stage 4 rph, middle stage 6 rph, Lower stage 12 rph Charge rate of the object to be treated; 1000 kg / min Object to be treated; 15 to 20 mm spherical sphere composed of 78% iron ore powder, 18% coal, and 4% binder Burning burner; Pulverized coal-fired burner × 10 places in lower furnace Atmospheric temperature; upper stage 500 ° C, middle stage 1000 ° C, lower stage 1300 ° C According to an experiment under these conditions, the object to be processed introduced from the upper inlet is heated and reduced in each stage and discharged from the lower stage. The pellets were taken out as pellets having a reduction ratio of 90% or more, and it was confirmed that the reduced iron production apparatus was highly economical.

【0029】[作用・効果]上記のような還元鉄製造装
置によれば、円形状の還元炉20内を旋回するグレード
(回転炉床)が、3段に積み重ねて構成されており、ま
ず、ペレット状の被処理体10が上段L3の投入口21
から上段グレード22上に投入されると、被処理体10
を載せた上段グレード22がゆっくり旋回しながら下段
から上昇してきた加熱ガスによて加熱され、略1回転し
た位置までくると、分割受皿が支持材25の回動によっ
て傾斜し被処理体10が滑り落ち、下降シュート31か
ら中段グレード23へ搬送される。中段L2では、上記
と同様に中段グレード23がゆっくり旋回しながら下段
から上昇してきた加熱ガスによってさらに加熱され、略
1回転した位置までくると、分割受皿が支持材25の回
動によって傾斜し被処理体10が滑り落ち、下降シュー
ト32から下段グレード24へ搬送される。
[Operation / Effect] According to the reduced iron manufacturing apparatus as described above, grades (rotary hearths) rotating in the circular reduction furnace 20 are formed by stacking in three stages. The object to be treated 10 in the form of a pellet is placed in the inlet 21 of the upper stage L3.
Is placed on the upper grade 22 from the
Is heated by the heating gas that has risen from the lower stage while slowly rotating, and reaches the position where it has been rotated substantially once, the divided pan tilts due to the rotation of the support member 25, and the workpiece 10 is tilted. It is slid down and transported from the descending chute 31 to the middle grade 23. In the middle stage L2, as described above, the middle stage 23 is further heated by the heating gas rising from the lower stage while slowly turning, and when reaching the position where it is rotated substantially one turn, the divided saucer is tilted by the rotation of the support member 25 to be covered. The processing object 10 slides down and is transported from the descending chute 32 to the lower grade 24.

【0030】そして、下段グレード24上の被処理体1
0は、ゆっくり旋回しながら燃焼バーナ3からの高温ガ
スによる輻射熱を受けて加熱され、還元反応を起こさせ
た後、略1回転した位置から搬出機8によって被処理体
10が排出される。
The object 1 on the lower grade 24
0 is heated while receiving radiant heat from the high-temperature gas from the combustion burner 3 while turning slowly, causing a reduction reaction, and then the unloading machine 8 discharges the object 10 from the position substantially rotated one turn.

【0031】また、この下段L1で使用され排気される
高温ガスは、床板26に設けられた加熱ガスの導入孔2
7から上段へ上昇し、図2で示すように各段で被処理体
10を加熱することによって熱エネルギーを有効に利用
し経済性を高めている。
The high-temperature gas used and exhausted in the lower stage L 1 is supplied to a heating gas introduction hole 2 provided in the floor plate 26.
7, the object 10 is heated at each stage as shown in FIG. 2, thereby effectively utilizing heat energy and increasing economic efficiency.

【0032】また、導入孔27には多孔材の輻射熱変換
体あるいは燃焼触媒体が介装されているので、下段から
上昇してきた可燃分を有する高温ガスが通過することに
よって、輻射熱変換あるいは燃焼を行ない、熱エネルギ
ーを効率よく被処理体10へ供給することができる。
Further, since a radiant heat converter or a combustion catalyst made of a porous material is interposed in the introduction hole 27, the radiant heat conversion or combustion is performed by passing a high temperature gas having a combustible component that has risen from the lower stage. The thermal energy can be efficiently supplied to the object 10 to be processed.

【0033】上記のような還元鉄製造装置によれば、還
元炉内のグレードを複数段に配置したので、被処理体の
生産量を同じとした従来の装置に比べて、装置の設置面
積を小さくすることができる。また、還元炉が小径化で
きるので、駆動装置等も小型化でき、全体的に装置重量
が軽減できる。
According to the above-described reduced iron production apparatus, since the grades in the reduction furnace are arranged in a plurality of stages, the installation area of the apparatus is smaller than that of the conventional apparatus in which the production amount of the object to be processed is the same. Can be smaller. Further, since the diameter of the reduction furnace can be reduced, the driving device and the like can be reduced in size, and the weight of the device can be reduced as a whole.

【0034】なお、本発明は上記実施例に限定されず、
本発明の要旨を逸脱しない範囲で各種変更が可能である
ことは言うまでもない。
The present invention is not limited to the above embodiment,
It goes without saying that various changes can be made without departing from the spirit of the present invention.

【0035】[0035]

【発明の効果】以上要するに本発明の還元鉄製造装置に
よれば、円形状の還元炉内を旋回する回転炉床上に石炭
を含む鉄鉱石粉から成る被処理体を載置し、同被処理体
を高温雰囲気中にて加熱、還元し鉄分を得る還元鉄製造
装置であって、前記還元炉内を旋回する回転炉床を上下
方向の複数段に積み重ねて構成し、最上段には被処理体
を投入する投入手段を設け、各段では回転炉床上で被処
理体を加熱すると共に下段への搬送手段を設け、最下段
には還元された被処理体を排出する排出手段を設けて構
成したので、装置がコンパクトになり、設置面積を小さ
くすることができる効果がある。そして、還元炉が小径
化できるので、駆動装置等も小型化でき、全体的に装置
重量が軽減でき、経済性の良い還元鉄製造装置を提供す
ることができる。
In summary, according to the apparatus for producing reduced iron of the present invention, an object made of iron ore powder containing coal is placed on a rotary hearth swirling in a circular reduction furnace. A reduced iron production apparatus for heating and reducing iron in a high-temperature atmosphere to obtain iron content, wherein a rotary hearth rotating in the reduction furnace is stacked in a plurality of vertical stages, and an object to be processed is provided at the uppermost stage. In each stage, a heating means is provided on the rotary hearth and a conveying means to the lower stage is provided, and a discharging means for discharging the reduced workpiece is provided at the lowest stage. Therefore, there is an effect that the device becomes compact and the installation area can be reduced. Further, since the diameter of the reduction furnace can be reduced, the drive device and the like can also be reduced in size, the weight of the apparatus can be reduced as a whole, and an economical reduced iron production apparatus can be provided.

【0036】また、前記最下段には被処理体を加熱する
燃焼装置を設け、最下段より上の段では最下段で発生し
た燃焼ガスを上段に導入することによって被処理体を加
熱するように構成したので、下段で発生した高温ガスの
熱エネルギーを、上段で有効に利用し経済性を高めるこ
とができる効果を奏したものである。
The lowermost stage is provided with a combustion device for heating the object to be processed, and the stage above the lowermost stage heats the object by introducing the combustion gas generated in the lowermost stage to the upper stage. With the configuration, the thermal energy of the high-temperature gas generated in the lower stage is effectively used in the upper stage, and the effect that the economic efficiency can be improved is exhibited.

【0037】また、上段と下段を区切り排出ガスの通路
となる部分に、多孔材の輻射熱変換体あるいは同輻射熱
変換体に触媒をコーティングした燃焼触媒体を具えて構
成したので、下段から排気される可燃分を有する高温ガ
スは、輻射熱変換体あるいは燃焼触媒体を通過すること
によって輻射熱変換あるいは燃焼を行ない、熱エネルギ
ーを効率よく被処理体へ供給することができる。
Further, since the upper and lower stages are separated from each other and provided with a radiant heat converter made of a porous material or a combustion catalyst obtained by coating the radiant heat converter with a catalyst, the exhaust gas is exhausted from the lower stage. The high-temperature gas having a combustible component performs radiant heat conversion or combustion by passing through a radiant heat converter or a combustion catalyst, and can efficiently supply heat energy to the object.

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

【図1】本発明の一実施例に係る還元鉄製造装置の縦断
面図である。
FIG. 1 is a longitudinal sectional view of a reduced iron production apparatus according to one embodiment of the present invention.

【図2】図1の要部説明図である。FIG. 2 is an explanatory diagram of a main part of FIG. 1;

【図3】本発明の一実施例に係る還元鉄製造装置の斜視
図である。
FIG. 3 is a perspective view of a reduced iron manufacturing apparatus according to one embodiment of the present invention.

【図4】従来の還元鉄製造装置の平面図である。FIG. 4 is a plan view of a conventional reduced iron manufacturing apparatus.

【図5】図4のV−V矢視断面図である。FIG. 5 is a sectional view taken along the line VV of FIG. 4;

【符号の説明】 3 バーナー 4 レール 5 駆動輪 8 排出機 9 排気ダクト 10 被処理体 20 還元炉 21 投入口 22 上段グレード 23 中段グレード 24 下段グレード 25 支持材 26 床板 27 導入孔 L1 上段 L2 中段 L3 下段[Description of Signs] 3 Burner 4 Rail 5 Drive Wheel 8 Discharger 9 Exhaust Duct 10 Workpiece 20 Reduction Furnace 21 Input Port 22 Upper Grade 23 Middle Grade 24 Lower Grade 25 Support 26 Floor Plate 27 Introducing Hole L1 Upper L2 Middle L3 Lower row

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 円形状の還元炉内を旋回する回転炉床上
に石炭を含む鉄鉱石粉から成る被処理体を載置し、同被
処理体を高温雰囲気中にて加熱、還元し鉄分を得る還元
鉄製造装置であって、前記還元炉内を旋回する回転炉床
を上下方向の複数段に積み重ねて構成し、最上段には被
処理体を投入する投入手段を設け、各段では回転炉床上
で被処理体を加熱すると共に下段への搬送手段を設け、
最下段には還元された被処理体を排出する排出手段を設
けたことを特徴とする還元鉄製造装置。
1. A workpiece made of iron ore powder containing coal is placed on a rotary hearth swirling in a circular reduction furnace, and the workpiece is heated and reduced in a high-temperature atmosphere to obtain iron. A reduced iron manufacturing apparatus, comprising: rotating hearths revolving in the reduction furnace, stacked in a plurality of vertical stages, a charging means for charging an object to be processed is provided at an uppermost stage, and a rotary furnace is provided at each stage. Heating the object on the floor and providing a transport means to the lower stage,
An apparatus for producing reduced iron, wherein a discharge means for discharging the reduced object is provided at the lowermost stage.
【請求項2】 前記最下段には被処理体を加熱する燃焼
装置を設け、最下段より上の段では最下段で発生した燃
焼ガスを上段に導入することによって被処理体を加熱す
ることを特徴とする請求項1記載の還元鉄製造装置。
2. A combustion device for heating an object to be processed is provided in the lowermost stage, and a heating device for heating an object to be processed by introducing combustion gas generated in the lowermost stage to an upper stage in a stage higher than the lowermost stage. The apparatus for producing reduced iron according to claim 1, wherein:
【請求項3】 上段と下段を区切り排出ガスの通路とな
る部分に、多孔材の輻射熱変換体あるいは同輻射熱変換
体に触媒をコーティングした燃焼触媒体を介装したこと
を特徴とする請求項2記載の還元鉄製造装置。
3. A radiant heat converter made of a porous material or a combustion catalyzer in which the radiant heat converter is coated with a catalyst is interposed in a portion that separates the upper stage and the lower stage and serves as an exhaust gas passage. The reduced iron production apparatus according to the above.
JP620997A 1997-01-17 1997-01-17 Apparatus for producing reduced iron Pending JPH10204514A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP620997A JPH10204514A (en) 1997-01-17 1997-01-17 Apparatus for producing reduced iron

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP620997A JPH10204514A (en) 1997-01-17 1997-01-17 Apparatus for producing reduced iron

Publications (1)

Publication Number Publication Date
JPH10204514A true JPH10204514A (en) 1998-08-04

Family

ID=11632150

Family Applications (1)

Application Number Title Priority Date Filing Date
JP620997A Pending JPH10204514A (en) 1997-01-17 1997-01-17 Apparatus for producing reduced iron

Country Status (1)

Country Link
JP (1) JPH10204514A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2542706A4 (en) * 2010-03-02 2017-06-14 Giulio Grossi Apparatus and methods for producing direct reduced iron
KR101867714B1 (en) * 2016-12-12 2018-06-14 주식회사 포스코 furnace for the reduction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2542706A4 (en) * 2010-03-02 2017-06-14 Giulio Grossi Apparatus and methods for producing direct reduced iron
KR101867714B1 (en) * 2016-12-12 2018-06-14 주식회사 포스코 furnace for the reduction

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