JPH09178352A - Horizontal apparatus and method for sintering - Google Patents
Horizontal apparatus and method for sinteringInfo
- Publication number
- JPH09178352A JPH09178352A JP35076795A JP35076795A JPH09178352A JP H09178352 A JPH09178352 A JP H09178352A JP 35076795 A JP35076795 A JP 35076795A JP 35076795 A JP35076795 A JP 35076795A JP H09178352 A JPH09178352 A JP H09178352A
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- Japan
- Prior art keywords
- sintering
- raw material
- zone
- tank
- horizontal
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は高炉製鉄法の原料で
ある焼結鉱を製造する横型焼結機および横型焼結法に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a horizontal sintering machine and a horizontal sintering method for producing a sintered ore which is a raw material for a blast furnace iron making method.
【０００２】[0002]
【従来の技術】鉄鉱石の焼結に関しては、ドワイトロイ
ド式焼結機が広く用いられている。これは、原料粉鉱石
に石灰石や珪石等の溶剤と粉コークス等の燃料と水とを
加えて混合、造粒した焼結原料を、キャタピラ状に配列
した焼結パレット上に充填して充填層を形成し、焼結パ
レットを順次水平移動して、点火炉内で充填層の表面に
点火した後、下方から吸引することにより、焼結原料内
のコークス等の燃料を燃焼させて発生した熱によって原
料粉鉱石を溶融、凝固させる焼成帯を漸次表層部から下
層部に移行させて焼結するもので、全焼結過程は２０〜
３０分程度で完了する。2. Description of the Related Art For sintering iron ore, a Dwightroid type sintering machine is widely used. This is a packing layer in which a sintering raw material obtained by adding a solvent such as limestone or silica stone, a fuel such as powdered coke, and water to a raw powdered ore and mixing and granulating the raw material is put on a sintering pallet arranged in a caterpillar shape. After the sintering pallet is sequentially moved horizontally to ignite the surface of the packed bed in the ignition furnace and then sucked from below, the heat generated by burning the fuel such as coke in the sintering raw material is generated. The sintering zone for melting and solidifying the raw powdered ore is gradually transferred from the surface layer portion to the lower layer portion and sintered.
It will be completed in about 30 minutes.
【０００３】ドワイトロイド式焼結機は連続式で、グリ
ーナワルド式焼結機等のような他の回分式焼結機に比べ
て大量生産に適しているのが広く用いられている理由で
ある。しかしながら、広大な敷地面積を必要とするだけ
でなく、焼成エネルギーが高い、漏風量が多い、成品顕
熱の回収がしにくい等の問題があるとされている。The Dwightroid type sintering machine is a continuous type and is widely used because it is more suitable for mass production than other batch type sintering machines such as a Greenwald type sintering machine. . However, it is said that not only a vast site area is required, but also the burning energy is high, the amount of air leakage is large, and it is difficult to recover the sensible heat of the product.
【０００４】そこで、特公平１−２１２０８号公報に
は、前述の問題を解決するため、一般的に熱効率が高い
とされる竪型式で粉鉱石を焼結する竪型焼結機が記載さ
れている。この竪型焼結機は、焼結原料を上端から装入
し、焼結機内を重力により降下させ、焼結機下端からは
空気を吹き込み、焼結原料内のコークス等の燃料を燃焼
させて焼結し、成品焼結鉱は下端から排出する装置であ
る。そして、竪型焼結機では、成品焼結鉱と吹き込んだ
空気が向流で熱交換するので、成品焼結鉱の顕熱を回収
して焼結に有効利用することができ、摺動部や運動部が
なく、漏風損失などがなく、熱効率が高く、点火用のエ
ネルギーも不要であるなど低エネルギーを達成できると
されている。In order to solve the above-mentioned problems, Japanese Patent Publication No. 1-21208 describes a vertical sintering machine which sinters fine ore in a vertical type which is generally considered to have high thermal efficiency. There is. This vertical type sintering machine charges the sintering raw material from the upper end, lowers the inside of the sintering machine by gravity, blows air from the lower end of the sintering machine, and burns fuel such as coke in the sintering raw material. It is a device that sinters and discharges the product sinter from the lower end. In the vertical sinter machine, the product sinter and the blown-in air exchange heat in countercurrent, so the sensible heat of the product sinter can be recovered and effectively used for sintering. It is said that low energy can be achieved because there are no moving parts, no loss of air leakage, high thermal efficiency, and no need for energy for ignition.
【０００５】また、特開昭６２−１９９７３１号公報記
載の竪型焼結機は、原料層を下方へ圧送することによ
り、鉛直方向の荷重を増大させて焼結用空気の限界風速
を大きくして焼成速度を上げ、生産性の向上を図ること
ができるとされている。Further, in the vertical sintering machine described in JP-A-62-199731, the load in the vertical direction is increased by pumping the raw material layer downward to increase the critical wind speed of the sintering air. It is said that the firing rate can be increased and productivity can be improved.
【０００６】[0006]
【発明が解決しようとする課題】しかし、竪型焼結機は
原料層から焼成帯、焼結完了層、破砕室、成品排出口等
をすべて上から下に竪に配置するため、装置の高さが極
めて高いものとならざるを得ない。そこで本発明は、低
エネルギーである等という従来の竪型焼結機の利点を生
かしつつ、コンパクトな設備とすることが可能な焼結機
および焼結法を提供することを目的とする。However, in the vertical type sintering machine, since the raw material layer, the firing zone, the sintering completed layer, the crushing chamber, the product discharge port, etc. are all arranged vertically from the top to the bottom, the apparatus is high in height. Is inevitably high. Therefore, an object of the present invention is to provide a sintering machine and a sintering method capable of providing compact equipment while taking advantage of the conventional vertical sintering machine having low energy.
【０００７】[0007]
【課題を解決するための手段】本発明の横型焼結機は、
上端から焼結原料を装入して貯留し、下端から排出する
原料槽の下方に押出しスクリューを設け、原料槽から排
出した焼結原料を押出しスクリューで横方向に圧送し、
焼結原料の圧送方向に対して向流に送風することにより
焼結原料の予熱帯、焼成帯、および冷却帯を横方向に順
次形成し、冷却帯を通過した成品焼結鉱を落下させて貯
留する成品槽を設けたことを特徴とする横型焼結機であ
る。押出しスクリューの羽根には、焼結原料粒径より小
さい孔を開けることが好ましい。The horizontal sintering machine of the present invention comprises:
The sintering raw material is charged and stored from the upper end, an extrusion screw is provided below the raw material tank discharged from the lower end, and the sintering raw material discharged from the raw material tank is pressure-fed laterally by the extrusion screw,
By blowing air countercurrently to the direction of pumping the sintering raw material, the pre-tropical zone of the sintering raw material, the firing zone, and the cooling zone are sequentially formed in the lateral direction, and the product sintered ore that has passed through the cooling zone is dropped. It is a horizontal sintering machine characterized by having a product tank for storing it. It is preferable that the blade of the extrusion screw has a hole smaller than the particle size of the sintering raw material.
【０００８】また、本発明の横型焼結法は、前記本発明
の横型焼結機を用い、送風圧力を大気圧以上とする高圧
送風を行うことを特徴とする横型焼結法である。Further, the horizontal sintering method of the present invention is a horizontal sintering method characterized in that high pressure air is blown at atmospheric pressure or higher using the horizontal sintering machine of the present invention.
【０００９】本発明の横型焼結機では、原料槽は上端か
ら焼結原料を装入して貯留し、下端から排出するのであ
るが、その後の焼結原料の予熱帯、焼成帯、および冷却
帯は横方向に形成することにした。すなわち、原料槽の
下方に押出しスクリューを設け、原料槽から排出した焼
結原料を押出しスクリューで横方向に圧送するととも
に、焼結原料の圧送方向の反対側から向流に送風する。
これにより、焼結原料は横方向に圧送されながら順次予
熱、焼成、冷却される。予熱帯、焼成帯、および冷却帯
を横方向に形成するので、前記従来の竪型焼結機のよう
にこれら全部を竪方向に形成する場合に比べて装置の高
さを大幅に減少させることができる。冷却後の成品焼結
鉱は落下させ、成品槽に貯留してさらに冷却した後排出
する。In the horizontal sintering machine of the present invention, the raw material tank is charged with the sintering raw material from the upper end and stored, and is discharged from the lower end. After that, the pre-heating zone, firing zone, and cooling of the sintering raw material are performed. I decided to form the strip laterally. That is, an extruding screw is provided below the raw material tank, and the sintering raw material discharged from the raw material tank is pressure-fed in the lateral direction by the extrusion screw and is blown countercurrently from the side opposite to the pressure-feeding direction of the sintering raw material.
As a result, the sintering raw material is sequentially preheated, fired, and cooled while being fed in the lateral direction. Since the pre-tropical zone, the firing zone, and the cooling zone are formed in the horizontal direction, the height of the device is significantly reduced compared to the case where all of them are formed in the vertical direction as in the conventional vertical sintering machine. You can The cooled product sintered ore is dropped, stored in the product tank, cooled further, and then discharged.
【００１０】押出しスクリューの羽根に孔がない場合
は、送風ガスは羽根に沿って螺旋状に廻りながら流れる
ので、送風圧力が高くなると焼結原料を逆流させる恐れ
がでてくる。そこで、押出しスクリューの羽根に焼結原
料粒径より小さい孔を開ければ、送風ガスは孔を通り抜
けて直進するようになり、焼結原料は羽根により強く押
し付けられて圧送されるので、高圧化、高流速化が可能
である。When the blades of the extrusion screw have no holes, the blowing gas flows spirally along the blades, and therefore the sintering raw material may flow backward when the blowing pressure increases. Therefore, if a hole smaller than the particle size of the sintering raw material is opened in the blade of the extrusion screw, the blown gas will go straight through the hole, and the sintering raw material will be strongly pressed by the blade and pressure-fed. Higher flow velocity is possible.
【００１１】本発明の横型焼結法では、前記本発明の横
型焼結機を用い、送風圧力を大気圧以上とする高圧送風
を行う。高圧送風すると酸素の供給量が多くなり、コー
クス等の燃料の燃焼速度を速めることができるので、焼
結速度が上昇して生産性が向上する。これにより、高さ
の低いコンパクトな設備を用いながら、低エネルギー等
の竪型焼結機の利点を生かして高生産性の焼結操業が可
能となる。In the horizontal sintering method of the present invention, the horizontal sintering machine of the present invention is used to perform high-pressure air blowing with a blowing pressure of atmospheric pressure or more. When high-pressure air is blown, the amount of oxygen supplied is increased, and the combustion speed of fuel such as coke can be increased, so that the sintering speed is increased and the productivity is improved. As a result, it is possible to perform a highly productive sintering operation by using the advantages of the vertical sintering machine such as low energy, while using a compact equipment with a low height.
【００１２】[0012]
【発明の実施の形態】図１に本発明の横型焼結機の例を
示す。FIG. 1 shows an example of a horizontal sintering machine of the present invention.
【００１３】原料槽１には原料コンベア２から焼結原料
３を装入して貯留する。焼結原料３は原料槽１内を重力
により降下し、下端から排出される。原料槽１の下方に
は押出しスクリュー４が設けてあり、焼結原料３を横方
向に圧送する。A raw material tank 1 is charged with a sintering raw material 3 from a raw material conveyor 2 and stored therein. The sintering raw material 3 falls in the raw material tank 1 by gravity and is discharged from the lower end. An extrusion screw 4 is provided below the raw material tank 1, and the sintering raw material 3 is laterally fed under pressure.
【００１４】横方向に圧送された焼結原料３には、予熱
帯５、焼成帯６、および冷却帯７を横方向に形成する。
予熱帯５では、高温の焼成帯６を通過してきた送風ガス
により焼結原料３を予熱、昇温する。焼成帯６では、焼
結原料３内のコークス等の燃料を送風空気で燃焼させ、
発生した熱によって原料粉鉱石を焼結させる。冷却帯７
では、焼結が完了した高温の成品焼結鉱８を送風ガスで
冷却する一方、送風ガスは熱交換により昇温する。On the sintering raw material 3 pumped in the lateral direction, a pre-tropical zone 5, a firing zone 6 and a cooling zone 7 are formed in the lateral direction.
In the preheat zone 5, the sintering raw material 3 is preheated and heated by the blast gas that has passed through the high temperature firing zone 6. In the firing zone 6, fuel such as coke in the sintering raw material 3 is burned with blast air,
The raw powder ore is sintered by the generated heat. Cooling zone 7
Then, the high temperature product sintered ore 8 after completion of sintering is cooled by the blast gas, while the blast gas is heated by heat exchange.
【００１５】冷却後の成品焼結鉱８は落下させて成品槽
９に貯留し、さらに冷却した後、シール機構を有する排
出装置１０を介して成品コンベア１１により排出する。The cooled product sintered ore 8 is dropped and stored in a product tank 9, and further cooled and then discharged by a product conveyor 11 via a discharge device 10 having a sealing mechanism.
【００１６】本焼結機には、焼結原料３に点火するため
の点火装置１２を備えている。点火装置１２は、焼結操
業の立ち上げ時にのみ焼結原料３に点火すれば、後は連
続的に供給される焼結原料３に焼成帯６において連続的
に点火されるので、常時使用する必要はなく、点火用の
エネルギーは非常に少なくてすむ。The present sintering machine is equipped with an ignition device 12 for igniting the sintering raw material 3. The igniter 12 is always used because if the igniting the sintering raw material 3 is ignited only at the start of the sintering operation, then the sintering raw material 3 continuously supplied is ignited continuously in the firing zone 6. It is not necessary and requires very little energy for ignition.
【００１７】送風ガスは成品槽９の上方の送風口１３か
ら供給し、冷却帯７で成品焼結鉱を冷却しながら熱交換
により昇温し、焼成帯６で焼結原料３内の燃料を燃焼さ
せて原料粉鉱石を焼結させ、予熱帯５で焼結原料３を予
熱しながら熱交換により冷却した後、排出口１４から排
ガスとして排出する。このように、本発明では、成品焼
結鉱の顕熱を回収して有効利用することができる。な
お、送風ガスが原料槽１中を上方へ吹き抜けると焼結原
料３の流動化を招き好ましくないので、送風ガスが吹き
抜けるのを防止するのに十分な充填層高さを有するよう
に焼結原料３を貯留する。The blown gas is supplied from the blower port 13 above the product tank 9, the temperature of the product sintered ore is raised by heat exchange while cooling the product sintered ore in the cooling zone 7, and the fuel in the sintering raw material 3 is heated in the firing zone 6. After burning to sinter the raw material powder ore and preheat the sintering raw material 3 in the preheat zone 5 to cool it by heat exchange, it is discharged from the discharge port 14 as exhaust gas. As described above, in the present invention, the sensible heat of the product sintered ore can be recovered and effectively utilized. If the blowing gas blows upward in the raw material tank 1, the sintering raw material 3 is fluidized, which is not preferable. Therefore, the sintering raw material should have a height of a packed bed sufficient to prevent the blowing gas from blowing through. Store 3
【００１８】図２には、押出しスクリュー４の羽根１５
を示す。羽根１５に孔がないと送風ガスは同図（ａ）に
矢印で示すように羽根１５に沿って廻って流れるが、羽
根１５に孔１６を開けておけば、同図（ｂ）に矢印で示
すように送風ガスは直進し、焼結原料の圧送を妨げるこ
とがない。FIG. 2 shows the blade 15 of the extrusion screw 4.
Is shown. If there is no hole in the blade 15, the blast gas flows around the blade 15 as shown by the arrow in FIG. 9A, but if a hole 16 is opened in the blade 15, it will be indicated by the arrow in FIG. As shown, the blowing gas goes straight and does not hinder the pressure feeding of the sintering raw material.
【００１９】[0019]
【発明の効果】本発明によれば、低エネルギー等の従来
の竪型焼結機の利点を生かしつつ、コンパクトな設備と
することが可能である。また、高圧送風により生産性の
向上を図ることができる。According to the present invention, it is possible to make the equipment compact while making the most of the advantages of the conventional vertical sintering machine such as low energy. Moreover, productivity can be improved by high-pressure air blowing.
【図１】本発明の横型焼結機の例を示す図である。FIG. 1 is a diagram showing an example of a horizontal sintering machine of the present invention.
【図２】本発明の横型焼結機に用いる押出しスクリュー
の羽根を示す図である。FIG. 2 is a diagram showing blades of an extrusion screw used in the horizontal sintering machine of the present invention.
１ 原料槽 ２ 原料コンベア ３ 焼結原料 ４ 押出しスクリュー ５ 予熱帯 ６ 焼成帯 ７ 冷却帯 ８ 成品焼結鉱 ９ 成品槽 １０ シール機構を有する排出装置 １１ 成品コンベア １２ 点火装置 １３ 送風口 １４ 排出口 １５ 羽根 １６ 孔 1 Raw Material Tank 2 Raw Material Conveyor 3 Sintering Raw Material 4 Extrusion Screw 5 Pre-Tropical Zone 6 Firing Zone 7 Cooling Zone 8 Product Sintering Ore 9 Product Tank 10 Discharge Device with Sealing Mechanism 11 Product Conveyor 12 Ignition Device 13 Blower 14 Discharge Port 15 Feather 16 holes
Claims (3)
端から排出する原料槽の下方に押出しスクリューを設
け、原料槽から排出した焼結原料を押出しスクリューで
横方向に圧送し、焼結原料の圧送方向に対して向流に送
風することにより焼結原料の予熱帯、焼成帯、および冷
却帯を横方向に順次形成し、冷却帯を通過した成品焼結
鉱を落下させて貯留する成品槽を設けたことを特徴とす
る横型焼結機。1. A sintering raw material is charged and stored from the upper end, and an extrusion screw is provided below the raw material tank which is discharged from the lower end, and the sintering raw material discharged from the raw material tank is laterally pressure-fed by the extrusion screw. By blowing air countercurrently to the direction of pumping the sintering raw material, the pre-tropical zone of the sintering raw material, the firing zone, and the cooling zone are sequentially formed in the lateral direction, and the product sintered ore that has passed through the cooling zone is dropped. A horizontal sintering machine characterized by having a product tank for storing.
より小さい孔を開けた請求項１記載の横型焼結機。2. The horizontal sintering machine according to claim 1, wherein the blade of the extrusion screw has a hole smaller than the particle size of the sintering raw material.
い、送風圧力を大気圧以上とする高圧送風を行うことを
特徴とする横型焼結法。3. A horizontal sintering method using the horizontal sintering machine according to claim 1 or 2, wherein high-pressure air is blown at a pressure of not less than atmospheric pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35076795A JPH09178352A (en) | 1995-12-26 | 1995-12-26 | Horizontal apparatus and method for sintering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35076795A JPH09178352A (en) | 1995-12-26 | 1995-12-26 | Horizontal apparatus and method for sintering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09178352A true JPH09178352A (en) | 1997-07-11 |
Family
ID=18412732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35076795A Withdrawn JPH09178352A (en) | 1995-12-26 | 1995-12-26 | Horizontal apparatus and method for sintering |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09178352A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021314A (en) * | 2010-12-14 | 2011-04-20 | 河南济源钢铁(集团)有限公司 | Sinter cooler lump ore braking system |
| CN108417831A (en) * | 2018-05-09 | 2018-08-17 | 广东邦普循环科技有限公司 | A kind of Preparation equipment and method of power type nickle cobalt lithium manganate |
| CN108417831B (en) * | 2018-05-09 | 2024-06-04 | 广东邦普循环科技有限公司 | Preparation equipment and method of power type lithium nickel cobalt manganese oxide |
-
1995
- 1995-12-26 JP JP35076795A patent/JPH09178352A/en not_active Withdrawn
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021314A (en) * | 2010-12-14 | 2011-04-20 | 河南济源钢铁(集团)有限公司 | Sinter cooler lump ore braking system |
| CN108417831A (en) * | 2018-05-09 | 2018-08-17 | 广东邦普循环科技有限公司 | A kind of Preparation equipment and method of power type nickle cobalt lithium manganate |
| CN108417831B (en) * | 2018-05-09 | 2024-06-04 | 广东邦普循环科技有限公司 | Preparation equipment and method of power type lithium nickel cobalt manganese oxide |
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