JPH0968390A - Device and method for cooling sintered ore - Google Patents

Device and method for cooling sintered ore

Info

Publication number
JPH0968390A
JPH0968390A JP22350995A JP22350995A JPH0968390A JP H0968390 A JPH0968390 A JP H0968390A JP 22350995 A JP22350995 A JP 22350995A JP 22350995 A JP22350995 A JP 22350995A JP H0968390 A JPH0968390 A JP H0968390A
Authority
JP
Japan
Prior art keywords
cooling
sinter
bed
sintering bed
zone
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
Application number
JP22350995A
Other languages
Japanese (ja)
Other versions
JP2927217B2 (en
Inventor
Shigeru Morishita
茂 森下
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.)
Nippon Steel Corp
Original Assignee
Sumitomo Metal 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 Sumitomo Metal Industries Ltd filed Critical Sumitomo Metal Industries Ltd
Priority to JP22350995A priority Critical patent/JP2927217B2/en
Publication of JPH0968390A publication Critical patent/JPH0968390A/en
Application granted granted Critical
Publication of JP2927217B2 publication Critical patent/JP2927217B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To improve permeability of an exhaust heat recovery zone by reduction of a ratio in which the interior of a sintering bed is occupied by a heated- to-redness zone and to increase an exhaust heat recovery amount by increasing an amount of cooling air. SOLUTION: Formation of a cooling device for a sintered ore is such that a sintered ore is cooled on a strand and after a cooling exhaust gas sensible heat is recovered, the exhaust gas is circulated to the sintered bed again and the sintered ore is cooled. A circulation hood 2 arranged on the sintered bed 1 is removed in cross section in the advancing direction of the pallet truck of the sintered bed 1 by a given length from a point, wherein a combustion tip line L reaches the lowermost layer of the sintered bed 1, to a position situated upper stream and a pressure in the circulation hood is adjusted to ±0. In a removed range, the sintered bed 1 sucks the ordinary temperature atmosphere.

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、焼結機ストランド上で
焼結鉱を冷却する装置及びこの装置を用いた冷却方法に
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cooling sinter ore on a sinter strand and a cooling method using this apparatus.

【0002】[0002]

【従来の技術】焼結機ストランド上で焼結鉱を冷却する
際、焼結ベッド上のガス温度が低いほど焼結鉱の冷却能
力は大きくなるが、良質エネルギーの回収量を増加した
り、粉塵公害を防止する観点から、ドワイトロイド型焼
結機では、オリジナルの大気吸引方法から、排熱回収を
終えたエネルギーレベルの低い熱量を持つ焼結鉱冷却排
ガス(≦200℃)を吸引させるべく、図5に示すよう
に、焼結ベッド1上に循環フード2を設け、この循環フ
ード2に排熱回収ボイラー3からの冷却排ガスを導通さ
せるダクトを接続していた。なお、図5中の4はサージ
ホッパー、5は点火炉、6はウインドボックス、7は電
気集塵機、8は排風機、9は煙突、10は1次クラッシ
ャー、11は秤量ホッパー、12は冷却機、13は循環
ファン、14はフード内散水装置を示す。
2. Description of the Related Art When cooling a sinter on a sinter strand, the lower the gas temperature on the sinter bed, the greater the cooling capacity of the sinter, but the amount of good energy recovered increases. From the viewpoint of preventing dust pollution, the Dwightroid-type sintering machine is designed to suck the sinter cooling exhaust gas (≦ 200 ° C) from the original atmospheric suction method, which has exhausted heat recovery and has a low energy level. As shown in FIG. 5, the circulation hood 2 was provided on the sintering bed 1, and the circulation hood 2 was connected to a duct for conducting the cooling exhaust gas from the exhaust heat recovery boiler 3. In FIG. 5, 4 is a surge hopper, 5 is an ignition furnace, 6 is a wind box, 7 is an electric dust collector, 8 is an exhaust fan, 9 is a chimney, 10 is a primary crusher, 11 is a weighing hopper, and 12 is a cooler. , 13 is a circulation fan, and 14 is a sprinkler in the hood.

【0003】従って、排熱回収の観点からは、焼結機ベ
ッド下部からの排ガス温度を高温にできるので、良質の
エネルギーが回収できる。しかし、吸引するガス温度
が大気を吸引する場合よりも高くなっていること、焼
結ベッド内においては、通気性の悪い高温の赤熱帯が多
くなって、焼結ベッド内の通気性を阻害し、冷却風量が
低下すること、によって焼結鉱の冷却能力は低下してい
る。
Therefore, from the viewpoint of exhaust heat recovery, the temperature of the exhaust gas from the lower part of the sintering machine bed can be raised to a high temperature, so that good quality energy can be recovered. However, the temperature of the gas to be sucked in is higher than that in the case of sucking in the air, and in the sintering bed, there is a large amount of high-temperature red tropics with poor air permeability, which impairs air permeability in the sintering bed. The cooling capacity of the sinter decreases due to the decrease in the cooling air volume.

【0004】[0004]

【発明が解決しようとする課題】そこで、ストランド冷
却ゾーンにおける吸引ファンの圧力を高くして対応して
いるが、当然に電力原単位が上昇してしまうという問題
がある。また、赤熱帯が多くなりすぎると、赤熱帯中の
最高温度も高いレベルで維持され、冷却されにくくなる
ので、低融点の塩化物等が溶融した化合物(融点500
〜600℃)がガスに同伴されてきて、ストランド冷却
ゾーンの排熱回収ボイラー設備内のボイラーチューブに
衝突し、ここで冷却されて付着成長し、ついにはダスト
詰まりが発生してボイラー設備のガス圧力損失が増大
し、ボイラー伝熱チューブの洗浄や更新工事が必要にな
る事態が発生する。
Therefore, although the pressure of the suction fan in the strand cooling zone is increased to cope with the problem, there is a problem that the power consumption rate naturally rises. In addition, if the red tropics become too large, the maximum temperature in the red tropics will be maintained at a high level, and it will be difficult to cool them.
(~ 600 ° C) is entrained in the gas and collides with the boiler tube in the exhaust heat recovery boiler equipment of the strand cooling zone, where it is cooled and adheres and grows, finally dust clogging occurs and the gas of the boiler equipment is generated. The pressure loss increases, and the boiler heat transfer tubes need to be cleaned and renewed.

【0005】また、焼結ベッド上へ循環する顕熱回収後
の冷却排ガスの温度を下げるために、循環フード内に冷
却水を噴霧散水する方法があるが、この方法は焼成ゾー
ンを含めた範囲で、かつパレットの幅方向全域にわたっ
て冷却水を噴霧散水するので、焼結ベッドの表面温度を
下げ、焼成ゾーンにおいては、その原料帯部分で再結露
して水分過多となり、焼成ゾーンの通気性を悪化させて
いた。また、循環フード内で蒸発しない水滴が循環フー
ドに付着し、循環フードを腐食させるという問題もあっ
た。
Further, there is a method of spraying cooling water into the circulation hood in order to lower the temperature of the cooling exhaust gas after sensible heat recovery circulating on the sintering bed. This method covers the range including the firing zone. In addition, since cooling water is sprayed and sprayed over the entire width direction of the pallet, the surface temperature of the sintering bed is lowered, and in the firing zone, re-condensation occurs in the raw material zone, resulting in excessive water content, and the air permeability of the firing zone is increased. It was getting worse. There is also a problem that water droplets that do not evaporate inside the circulation hood adhere to the circulation hood and corrode the circulation hood.

【0006】本発明は、上記した従来の問題点に鑑みて
なされたものであり、焼結ベッド内における赤熱帯の占
める割合を減少させて排熱回収ゾーンの通気性を向上さ
せ、冷却風量増加による排熱回収量の増加を図ることの
できる焼結鉱の冷却装置及びこの装置を用いた冷却方法
を提供することを目的としている。
The present invention has been made in view of the above-mentioned conventional problems, and reduces the proportion of red tropical zone in the sintering bed to improve the ventilation of the exhaust heat recovery zone and increase the cooling air volume. It is an object of the present invention to provide a sinter cooling device and a cooling method using this device, which can increase the amount of exhaust heat recovered by the above.

【0007】[0007]

【課題を解決するための手段】上記した目的を達成する
ために、本発明の焼結鉱の冷却装置は、焼結鉱をストラ
ンド上で冷却し、その冷却排ガス顕熱を熱回収した後、
その排ガスを再び焼結ベッド上へ循環させて焼結鉱を冷
却する装置において、焼結ベッド上に設置された循環フ
ードを、焼結ベッドにおけるパレット台車の進行方向断
面において、燃焼先端ラインが焼結ベッドの最下層に到
達する点から上流側へ所要長さだけ撤去し、循環フード
内圧力が±0となるようにするとともに、その撤去した
範囲では、焼結ベッドは常温の大気を吸引するように構
成しているのである。
In order to achieve the above-mentioned object, a cooling device for a sintered ore according to the present invention cools a sintered ore on a strand, and after recovering the cooling exhaust gas sensible heat by heat,
In a device that circulates the exhaust gas again on the sintering bed to cool the sinter, the circulation hood installed on the sintering bed is burned by the combustion tip line in the section in the traveling direction of the pallet truck on the sintering bed. Remove the required length upstream from the point of reaching the bottom layer of the tie bed so that the pressure inside the circulating hood is ± 0, and within the removed range, the sintering bed sucks in room temperature air. It is configured like this.

【0008】また、本発明の焼結鉱の冷却方法は、上記
した本発明の焼結鉱の冷却装置を用いて冷却するに際
し、大気吸引範囲又は/及びストランドから焼結鉱が排
鉱される直前の焼結ベッド上の、パレット側板から20
0mm以上離れた幅方向中央部にのみ冷却水を散水する
のである。
Further, in the method for cooling a sinter according to the present invention, when the sinter ore cooling device according to the present invention is used for cooling, the sinter is discharged from the atmospheric suction range and / or the strand. 20 from the pallet side plate on the last sintering bed
The cooling water is sprinkled only on the central portion in the width direction separated by 0 mm or more.

【0009】[0009]

【発明の実施の形態】点火炉5で焼結ベッド1の原料表
面に点火させた後は、焼成ゾーンにおけるウインドボッ
クス6や電気集塵機7等の排ガス処理設備、及び排風機
8によって、焼結ベッド1の表面から予め原料中に分散
されているコークスの燃焼用酸素が吸引,供給され、燃
焼領域はしだいに焼結ベッド1のパレット進行方向断面
における下層の部分に移行してゆく(図6参照)。この
燃焼帯15の上部は既に焼結鉱になって冷却されつつあ
る部分(以下、「焼結完了帯16」という)であり、燃
焼帯15の下部は未だ燃焼していない原料帯17であ
る。
BEST MODE FOR CARRYING OUT THE INVENTION After igniting the raw material surface of a sintering bed 1 in an ignition furnace 5, exhaust gas treatment equipment such as a wind box 6 and an electrostatic precipitator 7 in a firing zone, and an exhaust fan 8 are used to sinter the sintering bed. Oxygen for combustion of coke, which is previously dispersed in the raw material, is sucked and supplied from the surface of No. 1 and the combustion region gradually shifts to the lower layer portion in the pallet traveling direction cross section of the sintering bed 1 (see FIG. 6). ). The upper portion of the combustion zone 15 is a portion that has already become sinter and is being cooled (hereinafter referred to as "sinter completed zone 16"), and the lower portion of the combustion zone 15 is a raw material zone 17 that has not yet been burned. .

【0010】本発明の焼結鉱の冷却装置は、焼結鉱をス
トランド上で冷却し、その冷却排ガス顕熱を排熱回収ボ
イラー3で熱回収した後、その排ガスを再び焼結ベッド
1上へ循環させて焼結鉱を冷却する装置において、焼結
ベッド1上に設置された循環フード2を、焼結ベッド1
におけるパレット台車の進行方向断面において、燃焼先
端ラインが焼結ベッド1の最下層に到達する点から上流
側へ、図1に示すように、例えば8〜9mだけ撤去し、
その撤去した範囲では、焼結ベッド1は常温の大気を吸
引するように構成することで、焼結ベッド1におけるパ
レット台車の進行方向断面の燃焼帯15より上部におけ
る焼結完了帯16の冷却状態の温度勾配を、図2に示す
ように、この撤去した範囲のみ、従来の想像線で示す傾
斜に対して実線で示すように急傾斜させ、急速に冷却さ
せるようにしている。従って、この撤去した範囲より焼
結機下流側のゾーンでは、高温の赤熱帯範囲が少なくな
って通気性が向上し、冷却風量の増加が可能となる。
The sinter cooling device of the present invention cools the sinter on the strand, recovers the sensible heat of the cooled exhaust gas by the exhaust heat recovery boiler 3, and then recovers the exhaust gas on the sintering bed 1 again. In a device for cooling the sintered ore by circulating the circulating hood 2 installed on the sintering bed 1,
In the cross-section of the pallet truck in the direction of travel, the combustion tip line is removed from the point where it reaches the bottom layer of the sintering bed 1 to the upstream side, as shown in FIG.
In the removed range, the sintering bed 1 is configured to suck the ambient temperature atmosphere, so that the sintering completion zone 16 above the combustion zone 15 in the traveling direction cross section of the pallet truck in the sintering bed 1 is cooled. As shown in FIG. 2, the temperature gradient of No. 2 is steeply steeped as shown by the solid line in contrast to the conventional slanted line shown in FIG. 2 for rapid cooling. Therefore, in the zone on the downstream side of the sintering machine from the removed range, the high-temperature red tropical zone is reduced, the air permeability is improved, and the cooling air volume can be increased.

【0011】ところで、燃焼先端ラインLが焼結ベッド
1の最下層に到達する点は、パレット下部のウィンドボ
ックス6で焼成ゾーンと冷却ゾーンに区切られている点
であり、本発明の冷却装置を使用した場合には、この燃
焼先端ラインLより上流側で大気を焼結ベッド1上へ吸
引させることになるので、燃焼帯15より上層部の焼結
完了帯16を冷却した大気は、燃焼帯15を経て大気へ
放散される。
By the way, the point where the combustion tip line L reaches the bottom layer of the sintering bed 1 is that it is divided into a firing zone and a cooling zone by the wind box 6 below the pallet, and the cooling device of the present invention is used. When used, the atmosphere is sucked onto the sintering bed 1 on the upstream side of the combustion tip line L. Therefore, the atmosphere that has cooled the sintering completion zone 16 above the combustion zone 15 is It is released to the atmosphere via 15.

【0012】また、本発明の冷却装置においては、前記
大気を吸引する範囲、すなわち、循環フード2を撤去す
る範囲は、既設ストランドでの排熱回収後の排ガスを循
環する際に、焼結ベッド1上の循環フード2内の圧力が
±0となり、排ガスが焼結ベッド1と循環フード2から
吹き出すことがないように決定する。
Further, in the cooling device of the present invention, the range in which the atmosphere is sucked, that is, the range in which the circulation hood 2 is removed, is used when the exhaust gas after the exhaust heat recovery in the existing strands is circulated. The pressure inside the circulation hood 2 above 1 is ± 0, and it is determined that the exhaust gas does not blow out from the sintering bed 1 and the circulation hood 2.

【0013】また、本発明の冷却装置を使用した場合に
は、燃焼先端ラインLが焼結ベッド1の最下層に達した
点より下流側の焼結ベッド1の通気圧損は、焼結完了帯
16の冷却によって高温の赤熱帯範囲が減少して低下す
るので、風量が増加することによって、大気冷却により
大気へ放散する熱量より、通気性向上による風量増加の
効果のほうが大きくなり、排熱回収量が増加する。
When the cooling device of the present invention is used, the ventilation pressure loss of the sintering bed 1 on the downstream side of the point where the combustion tip line L reaches the bottom layer of the sintering bed 1 is Since the high temperature red tropical zone decreases and decreases due to the cooling of 16, the effect of increasing the air volume by improving air permeability is greater than the amount of heat dissipated to the atmosphere by increasing the air volume, and the exhaust heat recovery The amount increases.

【0014】また、従来は、循環フード2内を負圧側で
運転していたが、この場合には、図3に示すように、パ
レット側板18と焼結鉱の焼き締まりによって発生する
隙間aへ大気が流入するので、パレット側板18付近の
み冷却が進んで、更に隙間aが増大し、漏風が増加す
る。
Further, conventionally, the circulation hood 2 was operated on the negative pressure side. In this case, however, as shown in FIG. 3, the pallet side plate 18 and the clearance a generated by the sintering of the sintered ore are closed. Since the air flows in, cooling progresses only in the vicinity of the pallet side plate 18, the gap a further increases, and air leakage increases.

【0015】これに対して、本発明の冷却装置では、循
環ガスを焼結ベッド1上に戻す範囲を、前記したように
大気を吸引する範囲を設けることによって減少させ、か
つ、前記大気を吸引する範囲を設けることによって循環
フード2内の圧力を従来の負圧から±0となすことで、
冷風吸引に起因する漏風の増加を防止できる。
On the other hand, in the cooling device of the present invention, the range in which the circulating gas is returned to the sintering bed 1 is reduced by providing the range for sucking the atmosphere as described above, and the atmosphere is sucked in. By setting the range within which the pressure inside the circulation hood 2 is set to ± 0 from the conventional negative pressure,
It is possible to prevent an increase in air leakage due to cold air suction.

【0016】以上より、本発明の冷却装置を使用した場
合における焼結鉱の冷却速度は、大気吸引ゾーンで焼結
ベッド上の風速が約1.6m/sで一定の場合、170
℃の循環ガスから30℃の大気に切り替えると、800
℃ゾーンで冷却速度は110℃/min から168℃/mi
n に向上する。よって、排熱回収ゾーン入口の焼結ベッ
ド1の幅方向断面の赤熱帯範囲は、従来は55%あった
ものが48%に減少して通気抵抗も下がり、溶融ダスト
の飛散も少なくなる。
From the above, the cooling rate of the sintered ore when the cooling device of the present invention is used is 170 when the wind speed on the sintering bed is constant at about 1.6 m / s in the atmospheric suction zone.
800 ° C when switching from circulating gas at 30 ℃ to atmosphere at 30 ℃
Cooling rate in the ℃ zone is 110 ℃ / min to 168 ℃ / mi
improve to n. Therefore, the red-tropical range of the cross section in the width direction of the sintering bed 1 at the inlet of the exhaust heat recovery zone is reduced from 55% in the past to 48%, the ventilation resistance is lowered, and the scattering of the molten dust is reduced.

【0017】上記した本発明の冷却装置を使用すれば、
焼結鉱を効率的に冷却することができるが、さらに冷却
を強化したい場合には、例えば前記した大気吸引範囲の
焼結ベッド上のパレット側板から200mm以上離れた
幅方向中央部にのみ冷却水を散水すればよい。これが本
発明の冷却方法である。
Using the cooling device of the present invention as described above,
Although it is possible to efficiently cool the sinter, if it is desired to further strengthen the cooling, for example, cooling water is provided only in the widthwise central portion 200 mm or more away from the pallet side plate on the sinter bed in the atmosphere suction range described above. You can water it. This is the cooling method of the present invention.

【0018】本発明の冷却方法では、例えば大気吸引範
囲の焼結ベッド上に冷却水を散水するが、焼結ベッドの
表面は、既に焼結が完了しており、表面温度は循環ガス
温度程度になっているので、この表面に常温の水を散水
しても焼結鉱の品質への影響はない。
In the cooling method of the present invention, for example, cooling water is sprinkled on the sintering bed in the atmospheric suction range, but the surface of the sintering bed has already been sintered, and the surface temperature is about the circulating gas temperature. Therefore, sprinkling water at room temperature on this surface does not affect the quality of the sinter.

【0019】さらに、焼結ベッドの表面で蒸発した水蒸
気は、焼結鉱と徐々に熱交換しながら下層部へ通過して
ゆくので、高温の赤熱した部分と常温の水が直接接触す
ることなく冷却が可能である。従って、熱衝撃により焼
結鉱品質へ悪影響を及ぼすことがなく、任意のレベルで
冷却することが可能になる。
Further, the water vapor evaporated on the surface of the sinter bed gradually passes through the lower layer while exchanging heat with the sinter, so that the hot-red part does not come into direct contact with water at room temperature. Can be cooled. Therefore, the thermal shock does not adversely affect the quality of the sinter, and the cooling can be performed at any level.

【0020】また、蒸発した水蒸気の量は、数十m3/分
程度であり、かつ、完全な過熱蒸気となってウインドボ
ックス等へ導通されることや、他のウインドボックスか
らのガスと混合されるので、主排ガス全体の水分は、数
%程度向上するのみで、ウインドボックス内の結露によ
るダスト付着等の問題は発生しない。なお、ウインドボ
ックス内における結露を危惧する場合には、ウインドボ
ックスの内面又は外面を保温すればよい。
Further, the amount of vaporized water vapor is about several tens m 3 / minute, and it becomes a completely superheated vapor to be conducted to a wind box or the like, or mixed with gas from another wind box. Therefore, the water content of the entire main exhaust gas is improved by only about several percent, and the problem of dust adhesion due to dew condensation in the wind box does not occur. When there is a risk of dew condensation inside the wind box, the inner or outer surface of the wind box may be kept warm.

【0021】上記した本発明の冷却方法は、循環フード
を撤去した大気吸引範囲の焼結ベッド上に冷却水を散水
するのみならず、ストランドから焼結鉱が排鉱される直
前、例えば3〜4mの範囲に冷却水を散水しても良い。
The above-described cooling method of the present invention not only sprays cooling water onto the sintering bed in the atmospheric suction range from which the circulation hood has been removed, but also immediately before the sinter is discharged from the strand, for example, 3 to. You may sprinkle cooling water in the range of 4 m.

【0022】[0022]

【実施例】以下、図1に示す本発明に係る焼結鉱の冷却
装置を用いて、本発明の冷却方法を実施した場合の効果
について説明する。本発明の冷却方法を実施した際に適
用した本発明に係る焼結鉱の冷却装置は、焼結鉱をスト
ランド上で冷却し、その冷却排ガス顕熱を排熱回収ボイ
ラー3で熱回収した後、その排ガスを再び焼結ベッド1
上へ循環させて焼結鉱を冷却する装置において、焼結ベ
ッド1上に設置された循環フード2を、燃焼先端ライン
が焼結ベッド1の最下層に到達する点から上流側へ例え
ば8mだけ撤去したものである。
EXAMPLES The effects of carrying out the cooling method of the present invention using the sinter cooling apparatus according to the present invention shown in FIG. 1 will be described below. The sinter cooling device according to the present invention applied when the cooling method of the present invention is applied, cools the sinter on the strand, and recovers the cooling exhaust gas sensible heat with the exhaust heat recovery boiler 3. , The exhaust gas again sintering bed 1
In the apparatus for circulating upward to cool the sinter, the circulation hood 2 installed on the sintering bed 1 is moved upstream from the point where the combustion tip line reaches the bottom layer of the sintering bed 1 by, for example, 8 m. It has been removed.

【0023】かかる冷却装置を用いて、循環フード2を
撤去した大気吸引範囲の焼結ベッド1上のパレット側板
18から200mm離れた幅方向中央部にのみ、30℃
の冷却水を2.0m3/分の流量で散水したところ、散水
位置における焼結ベッド1上の原料の温度分布は図4
(b)に示すようであった。なお、図4(a)は散水前
の同じ位置の温度分布を示す。
Using such a cooling device, 30 ° C. is provided only in the widthwise central portion 200 mm away from the pallet side plate 18 on the sintering bed 1 in the atmosphere suction range where the circulation hood 2 is removed.
When the cooling water was sprinkled at a flow rate of 2.0 m 3 / min, the temperature distribution of the raw material on the sintering bed 1 at the sprinkling position was as shown in FIG.
It was as shown in (b). Note that FIG. 4A shows the temperature distribution at the same position before watering.

【0024】この図4より明らかなように、本発明の冷
却方法によれば、パレット側板18付近のみ冷却が進ん
で漏風が増加することなく、効果的に冷却を強化するこ
とができる。
As is apparent from FIG. 4, according to the cooling method of the present invention, the cooling can be effectively strengthened without the progress of cooling only in the vicinity of the pallet side plate 18 and the increase of air leakage.

【0025】[0025]

【発明の効果】以上説明したように、本発明装置によれ
ば、冷却排ガスの循環フードの中間部を撤去して大気を
吸引する範囲を設けることにより、焼結ベッド内の赤熱
帯の占める割合が減少し、排熱回収ゾーンの通気性が向
上するので、冷却風量の増加による排熱回収量の増加が
図れる。また、本発明方法によれば、ウインドボックス
内に結露させることなく、冷却を強化できる。
As described above, according to the apparatus of the present invention, the ratio of the red tropical zone in the sintering bed is occupied by removing the middle part of the cooling exhaust gas circulation hood and providing a range for sucking the atmosphere. Is reduced and the air permeability of the exhaust heat recovery zone is improved, so that the amount of exhaust heat recovery can be increased by increasing the cooling air volume. Further, according to the method of the present invention, cooling can be enhanced without dew condensation in the wind box.

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

【図1】本発明に係る焼結鉱の冷却装置の一実施例を示
す概略図である。
FIG. 1 is a schematic view showing an embodiment of a cooling device for a sintered ore according to the present invention.

【図2】図1に示す本発明に係る焼結鉱の冷却装置を使
用した場合の、焼結ベッドにおけるパレット台車の進行
方向断面の原料帯,燃焼帯,焼結完了帯の冷却状態の温
度勾配を示す図である。
FIG. 2 is a temperature of a raw material zone, a combustion zone, and a sintering completion zone in a cross section in a traveling direction of a pallet trolley in a sintering bed when the sinter cooling device according to the present invention shown in FIG. 1 is used. It is a figure which shows a gradient.

【図3】従来の冷却装置を使用した場合の、パレット側
板と焼結鉱の焼き締まりによって発生する隙間の説明図
である。
FIG. 3 is an explanatory diagram of a gap generated by the pallet side plate and the sintering ore when the conventional cooling device is used.

【図4】本発明方法による冷却水の散水位置における焼
結ベッド1上の原料の温度分布を示す図であり、(a)
は散水前、(b)は散水後を示す。
FIG. 4 is a diagram showing a temperature distribution of a raw material on the sintering bed 1 at a sprinkling position of cooling water according to the method of the present invention, (a)
Shows before watering, and (b) shows after watering.

【図5】従来の冷却装置の一実施例を示す概略図であ
る。
FIG. 5 is a schematic view showing an embodiment of a conventional cooling device.

【図6】従来の冷却装置を使用した場合の、焼結ベッド
におけるパレット台車の進行方向断面の原料帯,燃焼
帯,焼結完了帯の冷却状態の温度勾配を示す図である。
FIG. 6 is a diagram showing a temperature gradient in a cooling state of a raw material zone, a combustion zone, and a sintering completion zone of a cross section in a traveling direction of a pallet truck in a sintering bed when a conventional cooling device is used.

【符号の説明】[Explanation of symbols]

1 焼結ベッド 2 循環フード 3 排熱回収ボイラー 13 循環ファン 15 燃焼帯 16 燃焼完了帯 17 原料帯 L 燃焼先端ライン 1 Sintered bed 2 Circulation hood 3 Exhaust heat recovery boiler 13 Circulation fan 15 Combustion zone 16 Combustion completion zone 17 Raw material zone L Combustion front line

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 焼結鉱をストランド上で冷却し、その冷
却排ガス顕熱を熱回収した後、その排ガスを再び焼結ベ
ッド上へ循環させて焼結鉱を冷却する装置において、焼
結ベッド上に設置された循環フードを、焼結ベッドにお
けるパレット台車の進行方向断面において、燃焼先端ラ
インが焼結ベッドの最下層に到達する点から上流側へ所
要長さだけ撤去し、循環フード内圧力が±0となるよう
にするとともに、その撤去した範囲では、焼結ベッドは
常温の大気を吸引するように構成したことを特徴とする
焼結鉱の冷却装置。
1. A device for cooling a sinter on a strand, recovering the cooling exhaust gas sensible heat from the strand, and then circulating the exhaust gas again on the sintering bed to cool the sinter. The circulation hood installed above is removed by the required length upstream from the point where the combustion tip line reaches the lowermost layer of the sintering bed in the cross section of the pallet truck in the sintering bed in the traveling direction, and the pressure inside the circulation hood is removed. Is set to ± 0, and in the removed range, the sintering bed is configured to suck atmospheric air at room temperature.
【請求項2】 請求項1記載の焼結鉱の冷却装置を用い
て冷却するに際し、大気吸引範囲又は/及びストランド
から焼結鉱が排鉱される直前の焼結ベッド上の、パレッ
ト側板から200mm以上離れた幅方向中央部にのみ冷
却水を散水することを特徴とする焼結鉱の冷却方法。
2. When cooling with the sinter ore cooling device according to claim 1, from the pallet side plate on the sinter bed immediately before the sinter ore is discharged from the atmosphere suction range and / or the strands. A method for cooling a sinter, which comprises spraying cooling water only on a central portion in the width direction at a distance of 200 mm or more.
JP22350995A 1995-08-31 1995-08-31 Sinter cooling device and cooling method Expired - Lifetime JP2927217B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22350995A JP2927217B2 (en) 1995-08-31 1995-08-31 Sinter cooling device and cooling method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22350995A JP2927217B2 (en) 1995-08-31 1995-08-31 Sinter cooling device and cooling method

Publications (2)

Publication Number Publication Date
JPH0968390A true JPH0968390A (en) 1997-03-11
JP2927217B2 JP2927217B2 (en) 1999-07-28

Family

ID=16799267

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22350995A Expired - Lifetime JP2927217B2 (en) 1995-08-31 1995-08-31 Sinter cooling device and cooling method

Country Status (1)

Country Link
JP (1) JP2927217B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100432572B1 (en) * 1999-12-30 2004-05-24 주식회사 포스코 System for cooling the sintered ore
JP2006189202A (en) * 2005-01-06 2006-07-20 Nippon Steel Corp Dust collector for sinter charging apparatus
KR101356054B1 (en) * 2011-12-22 2014-01-28 주식회사 포스코 Apparatus for sintering iron ore
CN104807334A (en) * 2015-05-13 2015-07-29 中冶北方(大连)工程技术有限公司 System and method for utilizing low-temperature hot waste gas of circular cooler
KR20160059565A (en) * 2014-11-18 2016-05-27 주식회사 포스코 Apparatus and Method for Manufacturing Sintered Ore
KR20170001401A (en) * 2015-06-26 2017-01-04 주식회사 포스코 Processing method for raw material
KR20180086702A (en) * 2017-01-23 2018-08-01 주식회사 포스코 Apparatus for manufacturing sintered ore and method thereof

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100432572B1 (en) * 1999-12-30 2004-05-24 주식회사 포스코 System for cooling the sintered ore
JP2006189202A (en) * 2005-01-06 2006-07-20 Nippon Steel Corp Dust collector for sinter charging apparatus
JP4714469B2 (en) * 2005-01-06 2011-06-29 新日本製鐵株式会社 Dust collector for sintering charging equipment
KR101356054B1 (en) * 2011-12-22 2014-01-28 주식회사 포스코 Apparatus for sintering iron ore
KR20160059565A (en) * 2014-11-18 2016-05-27 주식회사 포스코 Apparatus and Method for Manufacturing Sintered Ore
CN104807334A (en) * 2015-05-13 2015-07-29 中冶北方(大连)工程技术有限公司 System and method for utilizing low-temperature hot waste gas of circular cooler
KR20170001401A (en) * 2015-06-26 2017-01-04 주식회사 포스코 Processing method for raw material
KR20180086702A (en) * 2017-01-23 2018-08-01 주식회사 포스코 Apparatus for manufacturing sintered ore and method thereof

Also Published As

Publication number Publication date
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