JPS59219421A - Operating method of sintering machine - Google Patents

Operating method of sintering machine

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Publication number
JPS59219421A
JPS59219421A JP9151883A JP9151883A JPS59219421A JP S59219421 A JPS59219421 A JP S59219421A JP 9151883 A JP9151883 A JP 9151883A JP 9151883 A JP9151883 A JP 9151883A JP S59219421 A JPS59219421 A JP S59219421A
Authority
JP
Japan
Prior art keywords
ignition
raw material
sintering
raw materials
sintering machine
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
JP9151883A
Other languages
Japanese (ja)
Other versions
JPS6248735B2 (en
Inventor
Minoru Watanabe
実 渡辺
Masaru Nakamura
勝 中村
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 JP9151883A priority Critical patent/JPS59219421A/en
Publication of JPS59219421A publication Critical patent/JPS59219421A/en
Publication of JPS6248735B2 publication Critical patent/JPS6248735B2/ja
Granted legal-status Critical Current

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  • Manufacture And Refinement Of Metals (AREA)

Abstract

PURPOSE:To produce sintered ore having a desirable reduction collapsing index and consistent quality by controlling the firing temp. to a specific range in association with the max. firing temp. according to the reduction collapsing index which is a control target. CONSTITUTION:The sintering raw materials fed from a hopper 4 for bedding and a raw material hopper 5 are deposited to a specified layer thickness on a moving pallet 1 and the coke in the raw materials is fired and burned by an ignition device 3 in synchronization with the force suction ventilation executed to the raw material layer from the upper to lower part. The sintering between the powder raw materials is accelerated and sintered lump ore is produced. A belt- like flame burner or the like is used as the device 3 in this case to control the firing time (the time when the surface of the raw material layer on the moving pallet 1 maintains >=900 deg.C under the combustion flame) to between 0.1-2.0min in association with the max. firing temp.

Description

【発明の詳細な説明】 本発明は、焼結機の操業方法に関し、特に管理目標とす
る還元崩壊指数に応じた点火装置の着火制御によって優
れた品質の焼結鉱を得るための操業方法について提案す
るものである。
[Detailed Description of the Invention] The present invention relates to an operating method of a sintering machine, and in particular to an operating method for obtaining excellent quality sintered ore by controlling the ignition of an ignition device according to a reduction decay index as a management target. This is a proposal.

従  来  技  術 第1図は、焼結機の概略を示すもので、図中の1はパレ
ット、2はウィンドボックス、8は点火装置、5は床敷
用ホッパー、4は原料ホッパーである。この種の焼結機
の操業は、移動する上記パレット1上に前記各ホッパー
4.5より切出した焼結原料を一定層厚に堆積させ、そ
の原料層に対しては上部から下部に向う強制吸引通風を
施すことと上記点火装置によって該原料中に混合したコ
ークスを着火燃焼させることにより、粉状原料相互の溶
融焼結を図り、塊状の焼結鉱を得る方法である。
BACKGROUND OF THE INVENTION Fig. 1 schematically shows a sintering machine, in which 1 is a pallet, 2 is a wind box, 8 is an igniter, 5 is a bedding hopper, and 4 is a raw material hopper. The operation of this type of sintering machine is to deposit the sintering raw material cut out from each hopper 4.5 on the moving pallet 1 in a constant layer thickness, and force the raw material layer from the top to the bottom. In this method, the powdered raw materials are melted and sintered by applying suction ventilation and igniting and burning the coke mixed in the raw materials using the ignition device, thereby obtaining a lumpy sintered ore.

かかる焼結鉱を生産するための焼結機の操業にあっては
、焼成過程の熱履歴が焼結鉱品質とくに還元崩壊指数に
重大な影響を及ぼす。そのために従来は、主として原料
中の炭材含有量、原料層表面への点火条件、あるいは吸
引通風条件等を操作して、該熱履歴の調整を行い、焼結
鉱品質の管理を行っていた。
When operating a sintering machine for producing such sintered ore, the thermal history of the sintering process has a significant effect on the quality of the sintered ore, particularly on the reductive decay index. To this end, in the past, the quality of sintered ore was managed by adjusting the thermal history mainly by manipulating the carbonaceous content in the raw material, the ignition conditions on the surface of the raw material layer, or the suction ventilation conditions. .

ただこの技術に関しては、従来採用している点火装置で
は、火炎形状や着火時間の制御に限界があるために、冷
却速度などの熱履歴制御による還元粉化特性の管理が十
分にできないで、品質の優れた焼結鉱の生産が困難とな
る場合があった。
However, with regard to this technology, the conventional igniters have limitations in controlling flame shape and ignition time, making it impossible to adequately manage reduction and powdering characteristics through thermal history control such as cooling rate. In some cases, it was difficult to produce high-quality sintered ore.

発明の目的 本発明の目的は、望ましい還元粉化特性を有するような
焼結鉱を、後述する着火時間の適切な制御によって、生
産することができる焼結機の操業方法を提案するところ
にある。
OBJECTS OF THE INVENTION An object of the present invention is to propose a method for operating a sintering machine that can produce sintered ore having desirable reduction and powdering characteristics by appropriately controlling the ignition time as described below. .

発明の構成と作用 本発明は、焼結鉱の品質特性の1つである還元粉化特性
が着火後の冷却状況、とりわけ原料とバーナ火炎との接
触が終了する点を調整すれば管理できるという基本的な
知見にもとづいて案出した方法である。
Structure and operation of the invention The present invention claims that the reduction powdering property, which is one of the quality characteristics of sintered ore, can be managed by adjusting the cooling conditions after ignition, especially the point at which the contact between the raw material and the burner flame ends. This method was devised based on basic knowledge.

通常、焼結機の点火装置3の点火距離を小さく(機長方
向の長さを短かく)すると、点火の条件は、着火最高温
度(Tmax)°Cと着火時間(、Ti)minとの関
係を示す第2図において、点のより点■に変化する。即
ち、着火時間Tiが短くなると同時にその熱補償(消火
域に入るのを避ける)のために着火最高温度Tmaxが
高くなる方向に変化するのである。
Normally, when the ignition distance of the ignition device 3 of the sintering machine is shortened (the length in the longitudinal direction is shortened), the ignition conditions are determined by the relationship between the maximum ignition temperature (Tmax) °C and the ignition time (, Ti) min. In FIG. 2 showing the point, the point changes to point ■. That is, as the ignition time Ti becomes shorter, the maximum ignition temperature Tmax changes to become higher in order to compensate for the heat (to avoid entering the extinguishing range).

例えば、パレットスピードPS一定操業のときに、着火
時間Tiが短くなると、第8図に示す原料層6表面と火
炎7との接触距離りが短くなる。そこで、着火開始点8
を同一位置とすれば、着火終了点9(すなわち冷却開始
位置)が給鉱部側9′へ移る。その結果、図中の焼結帯
10と冷却帯11との境界m=即ち冷却開始線CIは、
−律に給鉱部側a’!へ移り、 (yb・・・冷却帯厚さ)で示す冷却進行速度O8が大
きくなる。
For example, when the ignition time Ti becomes shorter during operation at a constant pallet speed PS, the contact distance between the surface of the raw material layer 6 and the flame 7 shown in FIG. 8 becomes shorter. Therefore, the ignition starting point 8
If they are set at the same position, the ignition end point 9 (that is, the cooling start position) moves to the ore feeding section side 9'. As a result, the boundary m between the sintering zone 10 and the cooling zone 11 in the figure = that is, the cooling start line CI is
- By law, the ore supply department side a'! Moving on, the cooling progress rate O8 indicated by (yb...cooling zone thickness) increases.

一般に、冷却進行速度aSは、大きい程還元粉化特性を
示ず還元崩壊指数(R,D、1.)が低下すると考えら
れている。これは骸晶状ヘマタイト組織の生成が抑制さ
れる結果と推定される。逆に、着火時間Tiが短くなる
と、前記冷却進行速度O8は小さくなり、R,D、 1
.は上昇する。従って、着火時間Tj、を、消火しない
ように着火最高温度Tmaxとの関連で調整ずれば、R
,D、 1.に代表される焼結鉱の品質を管理すること
ができるようになる。
Generally, it is believed that the larger the cooling progress rate aS is, the less reduction and powdering properties are exhibited and the reduction decay index (R, D, 1.) is lowered. This is presumed to be the result of suppressing the formation of skeletal hematite structures. Conversely, when the ignition time Ti becomes shorter, the cooling progress speed O8 becomes smaller, and R, D, 1
.. will rise. Therefore, if the ignition time Tj is adjusted in relation to the maximum ignition temperature Tmax so as not to extinguish the fire, R
,D, 1. It will be possible to control the quality of sintered ore, such as sintered ore.

なお、ここで言う着火時間T1とは、パレットとともに
移動しつつある原料層の表面が、バーナの燃焼火炎と接
触するかその雰囲気下にあって900°C以上の温度を
保持していて時間を指す。
Incidentally, the ignition time T1 referred to here is the time period during which the surface of the raw material layer moving with the pallet comes into contact with the combustion flame of the burner or is in the atmosphere and maintains a temperature of 900°C or more. Point.

ところで−■二連したように着火+rg7間Tlを煙く
した場合には、第2図に示す消火域に入ることを避ける
ために、着火最高温度Tll1axを上昇させる必要が
ある。しかし、点火装置3で使用する燃焼用ガスの理論
燃焼ガス温度の最大値は、2140°C(−r−クス炉
発生ガスi 4880 kcal/Nm  )であるこ
とから、この温度に対応する着火域と消火域の境界点(
第2図の0点)以下、すなわちTi−0,1m1n以下
に着火時間T1を短縮することはできない。
By the way, when Tl is smoked between ignition + rg7 as in the case of -■ twice, it is necessary to increase the maximum ignition temperature Tll1ax in order to avoid entering the extinguishing region shown in FIG. However, since the maximum value of the theoretical combustion gas temperature of the combustion gas used in the ignition device 3 is 2140°C (-r-x furnace generated gas i 4880 kcal/Nm), the ignition range corresponding to this temperature is and the boundary point of the extinguishing area (
It is not possible to shorten the ignition time T1 to less than (point 0 in FIG. 2), that is, less than Ti-0,1m1n.

一方、焼結用コークス(カーボン含有量80〜85%)
は、単体状態では最低700〜800°Cの温度で着火
するが、焼結機上において鉱石および水と混練された状
態でパレット」二に存在するコークスについては、水の
蒸発による吸熱および鉱石顕熱の上昇による吸熱の影響
を受けるため、着火に必要な最低温度は約900°Cが
必要である。
On the other hand, coke for sintering (carbon content 80-85%)
Coke ignites at a minimum temperature of 700 to 800°C when it is alone, but when it is mixed with ore and water on the sintering machine, the coke that exists on the pallet absorbs heat due to water evaporation and the ore clarifies. Because it is affected by heat absorption due to heat increase, the minimum temperature required for ignition is approximately 900°C.

即ちTn1aX900°C以下では、着火することがな
い。従って、図中の0点が、900°Cにおける最低着
火時間T1(2,0min )であり、Tlを2.0 
min以上にしても着火は可能であるが、過剰な燃料を
消費することになり経済的損失を招く。
That is, ignition does not occur below Tn1aX900°C. Therefore, the 0 point in the figure is the minimum ignition time T1 (2.0 min) at 900°C, and Tl is 2.0 min.
Although it is possible to ignite the fuel at a temperature higher than min, excessive fuel will be consumed, resulting in economic loss.

以上のような理由により、着火時間Tlには上下限があ
り、その範囲内(0,1〜2.0 min )で調、整
することにより、実際のR,D、 1.制御が可能とな
る。
For the above reasons, the ignition time Tl has an upper and lower limit, and by adjusting it within the range (0.1 to 2.0 min), the actual R, D, 1. Control becomes possible.

」二連のような知見に対し本発明では、点火装置8につ
き、一般的な第4図に示すような点火炉12と複数個の
バーナ13を使うもの(3)と、第5図に示すような帯
状火炎バーナ(8′)の特性について研究し、これを上
述した着火時間Ti調節のために応用した。
In contrast to the knowledge that the ignition device 8 has two sets, the present invention uses a general ignition furnace 12 and a plurality of burners 13 as shown in FIG. The characteristics of such a strip flame burner (8') were studied and applied to the above-mentioned ignition time Ti adjustment.

なお、前記帯状火炎バーナの構造は、パレット幅方向に
のびるガス−エヤ用ヘッダ管を中心として次のように構
成されている。ヘッダは同心2重管構造であり、図示の
番号14で示す内管は燃料ガスヘッダ、その外側で環状
流路を形成する外管がエヤヘッダ15である。上記燃料
ガスへラダ】5からは、先(Jii4にガスノズル孔1
6aを開口させたガスノズル8が長手方向に沿って突設
してあり、そのガスノズル16を中に挾んだその両側に
先端部にエヤノズル孔17a、1.7’aを開口させた
エヤノズル17.17を上記ガスノズルに沿って配設し
、バーナ本体を構成する。なお、上記の各ノズル孔16
 a 、 l ’7 a 、 17’aは、細孔を稠密
間隔で長手方向に多数列設する形式でもよいし、またス
リット状にしてもよい。
The structure of the belt-shaped flame burner is as follows, centering on a gas-air header pipe extending in the width direction of the pallet. The header has a concentric double tube structure, and the inner tube designated by the number 14 in the drawing is a fuel gas header, and the outer tube that forms an annular flow path outside of the inner tube is an air header 15. From [Rada] 5 to the above fuel gas, first (gas nozzle hole 1 to Jii4)
A gas nozzle 8 with an opening 6a is provided protruding along the longitudinal direction, and air nozzles 17. with air nozzle holes 17a and 1.7'a opened at the tips are provided on both sides of the gas nozzle 8 with the gas nozzle 16 held therein. 17 is arranged along the gas nozzle to constitute a burner body. In addition, each nozzle hole 16 mentioned above
a, l'7a, and 17'a may have a format in which a large number of pores are arranged in a row in the longitudinal direction at close intervals, or may be in the form of slits.

第6図は、従来の第4図に示す点火装置3と第5図に示
すIll状火炎バーナ8′の点火条件の比較を示すもの
で、図中の18は14本のバーナよりなる従来タイプの
点火装置3を用いた場合の操業点を示し、19はガス孔
数が510の多孔式帯状火炎バーナを用いた場合の操業
点である。なお、この時のパレットスピードは1.6 
m/minである。図に示すように、後者の方が、着火
温度が高く、着火時間が短かくなっている。パレット速
度PSと着火時間Tより着火用116L(L−PSXT
)を算出すると、第6図に示すように多孔式帯状バーナ
31を用いた場合の着火距離りは、従来タイプの約半分
程度になっている。第7図は、両者のノマーナ8.3′
を用いたときのR,D、 1.の比較を示すものである
が、帯状火炎バーナを用いるときの方が、R,D、 1
.を低くすることができ、この意味で両バーナ8,3′
を使い分ければ前記着火時間T1、ひ、いてはR,D、
 1.の自由な調節が可能になることが判・る。
FIG. 6 shows a comparison of the ignition conditions of the conventional ignition device 3 shown in FIG. 4 and the Ill-shaped flame burner 8' shown in FIG. 19 shows the operating point when using the ignition device 3, and 19 is the operating point when using a porous strip flame burner having 510 gas holes. In addition, the pallet speed at this time is 1.6
m/min. As shown in the figure, the latter has a higher ignition temperature and a shorter ignition time. 116L (L-PSXT) for ignition from pallet speed PS and ignition time T
), as shown in FIG. 6, the ignition distance when using the porous strip burner 31 is about half that of the conventional type. Figure 7 shows the Nomana 8.3' of both.
R, D when using 1. This shows a comparison of R, D, 1 when using a strip flame burner.
.. can be lowered, and in this sense both burners 8, 3'
If used properly, the ignition time T1, and even R, D,
1. It can be seen that it is possible to freely adjust the

要するに、例えば、高R,I)、 1.の焼結鉱を必要
とする場合には、従来タイプのバーナ8を、逆に低R,
D、 1.の焼結鉱を必要とする場合には帯状火炎バー
ナ3′を使用することにより、目標とする品質の焼結鉱
を得ることができる。また、従来タイプのバーナ3また
は帯状火炎バーナ3′を複数個組み合せて使用しても、
R,D、 1.制御が可能である。
In short, for example, high R, I), 1. If sintered ore of
D.1. When sintered ore of the desired quality is required, by using the strip flame burner 3', it is possible to obtain sintered ore of the target quality. Also, even if multiple conventional burners 3 or strip flame burners 3' are used in combination,
R, D, 1. Control is possible.

発明の詳細 な説明したように本発明によれば、通常のノく−ナと帯
状火炎バーナとを使い分けるなどして、着火時間を調節
することができるから、所望の還元崩壊指数を有する焼
結鉱の生産が可能である。
As described in detail, according to the present invention, the ignition time can be adjusted by selectively using a normal burner and a strip flame burner, so that sintering with a desired reductive decay index can be achieved. It is possible to produce ore.

また、パレットスピードを変化させても、着火時間の調
節さえずれば一定の品質の焼結鉱を得ることができるか
ら生産調整操業に当って有利に適用される。
Further, even if the pallet speed is changed, sintered ore of constant quality can be obtained by adjusting the ignition time, so it is advantageously applied in production adjustment operations.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、焼結機の概略図、 第2図は、着火最高温度と着火時間との関係を示すグラ
フ、 第3図は、焼結原料層内焼結状部を示す断面図、第4図
は、一般の点火装置を示す断面図、第5図は帯状火炎バ
ーナについて示すもので、(a)は断面図、Φ)は正面
図、 第6図は、バーナの別による着火最高温度と着火時間と
の関係を示すグラフ、 第7図は、バーナの別によるR、 D、 1.と着火時
間との関係を示すグラフである。 1・・・パレット 8・・・点火装置(従来バーナ) 3′・・・点火装置(帯状火炎バーナ)。 第3図 第4図 第5図
Fig. 1 is a schematic diagram of the sintering machine, Fig. 2 is a graph showing the relationship between maximum ignition temperature and ignition time, Fig. 3 is a cross-sectional view showing the sintered part in the sintering raw material layer, Figure 4 is a sectional view of a general ignition device, Figure 5 is a strip flame burner, where (a) is a sectional view, Φ) is a front view, and Figure 6 is the maximum ignition temperature for different burners. A graph showing the relationship between ignition time and ignition time, Figure 7, shows the relationship between R, D, and ignition time depending on the burner. It is a graph which shows the relationship between and ignition time. 1... Pallet 8... Ignition device (conventional burner) 3'... Ignition device (band flame burner). Figure 3 Figure 4 Figure 5

Claims (1)

【特許請求の範囲】 L 移動するパレット上に装入堆積させた原料層に対し
て上部から下部に向う吸す1通風を行うことにあわせ、
原料中に混合しであるコークスを着火燃焼させることに
より、粉状原料相互の焼結を促進し塊状焼結鉱を得る焼
結機の操業において、 管理目標の還元崩壊指数に応じて下記に定銘する着火時
間T1を・着火最高温度との関連のもとて0.1〜2.
0分の間に制御することを特徴とする焼結機の操業方法
。 記 着火時間(Ti) :パレットとともに移動しつある原
料層のその表面が、 燃焼火炎下において900°C 以上の湿度を保持している 時間。
[Scope of Claims] L In addition to blowing air from the top to the bottom of the raw material layer charged and deposited on the moving pallet,
In the operation of a sintering machine that promotes sintering of powdery raw materials and obtains a lumpy sintered ore by igniting and burning the coke mixed in the raw materials, the following is determined according to the reduction decay index of the management target. The ignition time T1 to be marked is 0.1 to 2.0 in relation to the maximum ignition temperature.
A method of operating a sintering machine characterized by controlling the sintering machine for 0 minutes. Ignition time (Ti): The time during which the surface of the raw material layer moving with the pallet maintains a humidity of 900°C or more under the combustion flame.
JP9151883A 1983-05-26 1983-05-26 Operating method of sintering machine Granted JPS59219421A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9151883A JPS59219421A (en) 1983-05-26 1983-05-26 Operating method of sintering machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9151883A JPS59219421A (en) 1983-05-26 1983-05-26 Operating method of sintering machine

Publications (2)

Publication Number Publication Date
JPS59219421A true JPS59219421A (en) 1984-12-10
JPS6248735B2 JPS6248735B2 (en) 1987-10-15

Family

ID=14028627

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9151883A Granted JPS59219421A (en) 1983-05-26 1983-05-26 Operating method of sintering machine

Country Status (1)

Country Link
JP (1) JPS59219421A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5717059A (en) * 1980-07-04 1982-01-28 Hitachi Ltd Processor for pipeline control data

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5717059A (en) * 1980-07-04 1982-01-28 Hitachi Ltd Processor for pipeline control data

Also Published As

Publication number Publication date
JPS6248735B2 (en) 1987-10-15

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