JPH04259335A - Production of sintered ore - Google Patents
Production of sintered oreInfo
- Publication number
- JPH04259335A JPH04259335A JP2093691A JP2093691A JPH04259335A JP H04259335 A JPH04259335 A JP H04259335A JP 2093691 A JP2093691 A JP 2093691A JP 2093691 A JP2093691 A JP 2093691A JP H04259335 A JPH04259335 A JP H04259335A
- Authority
- JP
- Japan
- Prior art keywords
- roller
- raw material
- sintering
- upper layer
- pallet
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 238000005245 sintering Methods 0.000 claims abstract description 25
- 239000002994 raw material Substances 0.000 claims abstract description 20
- 239000010410 layer Substances 0.000 description 23
- 238000000034 method Methods 0.000 description 10
- 238000007596 consolidation process Methods 0.000 description 7
- 239000000571 coke Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 230000007423 decrease Effects 0.000 description 6
- 238000005056 compaction Methods 0.000 description 5
- 230000003247 decreasing effect Effects 0.000 description 5
- 239000003575 carbonaceous material Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000010411 cooking Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009490 roller compaction Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
Abstract
Description
【0001】0001
【産業上の利用分野】焼結ベッド上層部の強度および歩
留りの向上を図る焼結鉱製造方法に関するものである。FIELD OF INDUSTRIAL APPLICATION This invention relates to a method for producing sintered ore that improves the strength and yield of the upper layer of a sintered bed.
【0002】0002
【従来の技術】走行するパレットに焼結原料を装入し、
焼結原料層の表面に点火し、下向き吸引により焼結鉱を
製造する焼結鉱製造方法においては、焼結ベッド(焼結
層)の上層部の強度が低く、歩留りが悪くなる。これは
焼結ベッドの上層部が吸引される冷空気により冷却され
、焼結するのに十分な温度および時間がなくなる(熱量
不足になる)ためと考えられている。[Prior art] Sintering raw materials are loaded onto a moving pallet,
In a sintered ore production method in which sintered ore is produced by igniting the surface of a sintered raw material layer and sucking it downward, the strength of the upper layer of the sintered bed (sintered layer) is low, resulting in poor yield. This is thought to be because the upper layer of the sintering bed is cooled by the drawn-in cold air, and there is no longer enough temperature and time for sintering (lack of heat).
【0003】焼結ベッドの上層部の強度の低下を防止す
るため、点火炉に続き保熱炉を設けて、点火後の焼結ベ
ッドに熱風を吸引させる方法が従前から行われている。
この保熱炉による方法は設備費が高いという欠点がある
。このため、保熱炉に代わる方法の提案が幾つかなされ
ている。特開昭58−217642号公報は、パレット
上の給鉱槽中にパレット進行方向側にコ−クスを偏在さ
せ、ドラムフィーダーでパレットに上部にコークスが多
い配合原料を装入するものであり、特開昭63−206
436号公報は、複数の棒状材を下位側を山形として異
なる傾斜角度で配置したフルイ面の直前位置又はフルイ
面を通過した細粒に炭材又は炭材と焼結原料との混合物
を添加して焼結原料層の上層部にコークスを多く添加す
るものである。In order to prevent the strength of the upper layer of the sintering bed from decreasing, a method has been used in the past in which a heat retention furnace is provided following the ignition furnace and hot air is sucked into the sintered bed after ignition. This method using a heat retention furnace has the disadvantage of high equipment costs. For this reason, several proposals have been made for methods to replace the heat retention furnace. JP-A-58-217642 discloses a system in which coke is unevenly distributed in an ore feeding tank on a pallet in the direction in which the pallet advances, and mixed raw materials with a large amount of coke at the top are charged to the pallet using a drum feeder. Japanese Patent Publication No. 63-206
Publication No. 436 discloses that carbon material or a mixture of carbon material and sintering raw material is added to a position immediately before a sieve surface or to fine grains that have passed through a sieve surface, in which a plurality of rod-shaped materials are arranged at different inclination angles with the lower side thereof being chevron-shaped. In this method, a large amount of coke is added to the upper layer of the sintering raw material layer.
【0004】0004
【発明が解決しようとする課題】特開昭58−2176
42号公報は、給鉱槽中でコ−クスを偏在させるための
コークス供給装置を別に設ける必要がある。また、特開
昭63−206436号公報も、コークス供給装置が必
要であり、いずれも、設備費が高価になるという問題点
がある。[Problem to be solved by the invention] JP-A-58-2176
No. 42 requires a separate coke supply device for unevenly distributing coke in the ore feed tank. Further, Japanese Patent Application Laid-open No. 63-206436 also requires a coke feeding device, and both have the problem of high equipment costs.
【0005】また、焼結ベッドの焼き締まりにより、そ
の上層部に不規則で、長い亀裂が入り、歩留りが低下す
る原因となっている(不規則な亀裂により焼結ベッドの
焼きむらが生じ、歩留りが低下する)。[0005] Furthermore, due to the sintering compaction of the sintered bed, irregular and long cracks appear in the upper layer, which causes a decrease in yield (irregular cracks cause uneven firing of the sintered bed, (yield decreases).
【0006】本発明は、焼結ベッドの上層部の強度およ
び歩留りを向上させる安価な方法を提供することを目的
とするものである。It is an object of the present invention to provide an inexpensive method of improving the strength and yield of the upper layer of a sinter bed.
【0007】[0007]
【課題を解決するための手段】本発明は上記のような目
的を達成しようとするもので、焼結原料装入シュートと
点火炉の間にリング状突起をパレット巾方向に間隔的に
形成したローラーを設け、該ローラーで焼結原料層表面
を圧密することを特徴とする焼結鉱製造方法である。[Means for Solving the Problems] The present invention aims to achieve the above-mentioned objects, and includes ring-shaped protrusions formed at intervals in the width direction of the pallet between the sintering raw material charging chute and the ignition furnace. This method of producing sintered ore is characterized by providing a roller and compacting the surface of the sintered raw material layer with the roller.
【0008】[0008]
【作用】焼結原料層の表面を圧密することにより、上層
部の焼結速度が適度に抑制され上層部の強度および歩留
りが向上する。ローラーの突起により焼結ベッド表層に
パレットの進行方向に平行に多数の凹溝が形成され、圧
密による通気性の低下が抑制される。また、上層部に生
じる亀裂が分散化し焼きむらが減少する。[Operation] By compacting the surface of the sintering raw material layer, the sintering rate of the upper layer is moderately suppressed, and the strength and yield of the upper layer are improved. The protrusions of the rollers form a large number of grooves in the surface layer of the sintering bed in parallel to the direction in which the pallet travels, thereby suppressing a decrease in air permeability due to compaction. In addition, cracks that occur in the upper layer are dispersed and uneven burning is reduced.
【0009】[0009]
【実施例】本発明の実施例を以下に詳細に説明する。図
1は本発明の方法の説明図である。サージホッパー1に
給鉱された焼結原料は、ロールフィーダ2により一定量
切り出され、装入シュート3を介して移動するパレット
4上に装入される。パレット4上に一定厚さに装入、形
成された焼結原料層5は、点火炉6でその表面に点火さ
れるとともに下向き吸引によって下層方向に焼結されて
ゆく。本発明においては、装入シュート3と点火炉6の
間の焼結原料層5の表面に、外周にリング状突起をパレ
ット巾方向に間隔的に形成したローラー7を、回転自在
且つ上下方向に移動可能に設けてある。なお、パレット
の移動により回転されるので駆動装置は不要である。そ
して、焼結原料層5の表面にローラーを一定深さ圧入し
て、焼結原料層5の上層部を圧密するとともに、表面に
突起による多数の凹状溝を形成して焼結するものである
。ローラーの圧入深さdを以下圧密深さという。EXAMPLES Examples of the present invention will be described in detail below. FIG. 1 is an explanatory diagram of the method of the present invention. A certain amount of the sintering raw material fed to the surge hopper 1 is cut out by a roll feeder 2 and charged onto a moving pallet 4 via a charging chute 3. The sintered raw material layer 5 charged and formed to a constant thickness on the pallet 4 is ignited on its surface in an ignition furnace 6 and sintered downward by downward suction. In the present invention, on the surface of the sintered raw material layer 5 between the charging chute 3 and the ignition furnace 6, a roller 7 having ring-shaped protrusions formed on the outer periphery at intervals in the width direction of the pallet is provided. It is set up so that it can be moved. Note that since the pallet is rotated by movement, a drive device is not required. Then, a roller is press-fitted into the surface of the sintering raw material layer 5 to a certain depth to compact the upper layer of the sintering raw material layer 5, and sintering is performed by forming a large number of concave grooves made of protrusions on the surface. . The press-fitting depth d of the roller is hereinafter referred to as the consolidation depth.
【0010】本発明に使用するローラー7は図2に示す
ように、パレット巾より若干短い長さのローラーの外周
に、高さhが10〜50mm、厚さ3〜10mmのリン
グ状突起8を100〜500mmの取付け間隔bで取付
けて形成している。As shown in FIG. 2, the roller 7 used in the present invention has a ring-shaped protrusion 8 with a height h of 10 to 50 mm and a thickness of 3 to 10 mm on the outer periphery of the roller whose length is slightly shorter than the width of the pallet. They are attached and formed at an attachment interval b of 100 to 500 mm.
【0011】表1はローラーの圧密深さおよび突起の高
さ等を変えて本発明の方法を実施したときの操業諸元と
比較例の操業諸元を示したものである。Table 1 shows the operating specifications when the method of the present invention was carried out by changing the compaction depth of the rollers, the height of the protrusions, etc., and the operating specifications of a comparative example.
【0012】0012
【表1】[Table 1]
【0013】比較例(1)は圧密ローラーを使用しない
従来方法の実施結果であり、比較例(2)はローラーの
圧密による効果を確認するために突起無しローラーを使
用して行った実施結果である。圧密すると、強度が上昇
して返鉱原単位が減少するが生産率が下がることが分か
った。これは、圧密により上層部の強度、歩留りが向上
したが、通気性が低下し生産率が低下したことによる。Comparative Example (1) is the result of a conventional method that does not use a compaction roller, and Comparative Example (2) is a result of a test using a roller without protrusions to confirm the effect of roller compaction. be. It was found that consolidation increases strength and reduces return ore consumption, but it also lowers production rate. This is because although consolidation improved the strength and yield of the upper layer, the air permeability decreased and the production rate decreased.
【0014】すなわち、両者は反比例関係にあり、独立
に向上させることは従来の技術では不可能であった。本
発明(1)〜本発明(3)は圧密深さを20mm、突起
の取付け間隔を300mmと一定とし、突起の高さを変
えて本発明方法を実施した結果である。突起の高さを大
きくすると、強度は低下する(返鉱原単位は増加する)
が生産率は増加した。That is, the two are in an inversely proportional relationship, and it has been impossible with conventional techniques to improve them independently. Inventions (1) to (3) are the results of carrying out the method of the present invention with a consolidation depth of 20 mm, a constant interval of 300 mm between protrusions, and varying the height of the protrusions. As the height of the protrusion increases, the strength decreases (the return unit increases)
But the production rate increased.
【0015】また、圧密深さを20mm、突起の高さを
30mmと一定とし、突起の取付け間隔を変えて行った
ものが、本発明(4)と(5)である。本発明(2)、
(4)、(5)の結果から突起の取付け間隔を大きくす
ると強度は増加(返鉱原単位は減少)するが、生産率が
低下した。次に、突起の高さを10mm、突起の取付け
間隔を300mmと一定とし、圧密深さを変えて行った
ものが、本発明(6)と(7)である。本発明(1)、
(6)、(7)の結果から圧密深さを深くすると、強度
は増加(返鉱原単位は減少)するが、生産率は低下した
。これは比較例(1)、(2)と同様の傾向を示してい
る。これらの実施例より、本発明はいずれの場合も比較
例(1)に比べ高歩留りとなり、また比較例(2)に比
べ高生産率となっている。[0015] Further, in the present invention (4) and (5), the consolidation depth was kept constant at 20 mm, the height of the protrusions was fixed at 30 mm, and the intervals at which the protrusions were attached were varied. The present invention (2),
From the results of (4) and (5), increasing the spacing between protrusions increases the strength (returning ore consumption rate decreases), but the production rate decreases. Next, the present invention (6) and (7) are obtained by setting the height of the protrusions to 10 mm and the mounting interval of the protrusions to a constant value of 300 mm, and varying the consolidation depth. The present invention (1),
From the results of (6) and (7), when the consolidation depth was increased, the strength increased (return ore consumption rate decreased), but the production rate decreased. This shows the same tendency as Comparative Examples (1) and (2). From these Examples, the present invention has a higher yield than Comparative Example (1) in all cases, and a higher production rate than Comparative Example (2).
【0016】[0016]
【発明の効果】本発明は以上のように構成されているか
ら、安価な設備で焼結ベッドの上層部の強度および歩留
りを向上することができるとともに、焼結ベッドの焼き
締まりによる亀裂を分散化し、焼きむらを減少させるこ
とができる。[Effects of the Invention] Since the present invention is constructed as described above, it is possible to improve the strength and yield of the upper layer of the sintering bed with inexpensive equipment, and also disperse cracks caused by compaction of the sintering bed. This can reduce uneven cooking.
【図1】本発明の方法の説明図である。FIG. 1 is an explanatory diagram of the method of the present invention.
【図2】本発明に使用するローラーの斜視図である。FIG. 2 is a perspective view of a roller used in the present invention.
3 装入シュート 4 パレット 5 焼結原料層 6 点火炉 7 ローラー 8 突起 3 Charging chute 4 Palette 5 Sintering raw material layer 6 Ignition furnace 7 Roller 8.Protrusion
Claims (1)
リング状突起をパレット巾方向に間隔的に形成したロー
ラーを設け、該ローラーで焼結原料層表面を圧密するこ
とを特徴とする焼結鉱製造方法。1. A roller having ring-shaped protrusions formed at intervals in the width direction of the pallet is provided between the sintering raw material charging chute and the ignition furnace, and the surface of the sintering raw material layer is compacted by the roller. Sintered ore manufacturing method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2093691A JPH04259335A (en) | 1991-02-14 | 1991-02-14 | Production of sintered ore |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2093691A JPH04259335A (en) | 1991-02-14 | 1991-02-14 | Production of sintered ore |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04259335A true JPH04259335A (en) | 1992-09-14 |
Family
ID=12041094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2093691A Pending JPH04259335A (en) | 1991-02-14 | 1991-02-14 | Production of sintered ore |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04259335A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100402027B1 (en) * | 2000-12-21 | 2003-10-17 | 주식회사 포스코 | apparatus for pressing the upper material layer of sinter machine |
JP2020085275A (en) * | 2018-11-19 | 2020-06-04 | 日本製鉄株式会社 | Sintering machine |
-
1991
- 1991-02-14 JP JP2093691A patent/JPH04259335A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100402027B1 (en) * | 2000-12-21 | 2003-10-17 | 주식회사 포스코 | apparatus for pressing the upper material layer of sinter machine |
JP2020085275A (en) * | 2018-11-19 | 2020-06-04 | 日本製鉄株式会社 | Sintering machine |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPH04259335A (en) | Production of sintered ore | |
JPH04259336A (en) | Production of sintered ore | |
JP2520203B2 (en) | Sinter production method | |
US4648900A (en) | Suction sintering method and apparatus therefor | |
JPH02263935A (en) | Method for controlling air permeability in sintering raw material layer | |
JP2003277841A (en) | Method for producing sintered ore | |
JPS57164940A (en) | Method and apparatus for charging starting material into sintering machine | |
JPS6139278Y2 (en) | ||
JP2732115B2 (en) | Air permeability adjusting device for sintering raw material layer | |
US2895818A (en) | Method and apparatus for deep-bed charging of traveling grates | |
JPS6113918Y2 (en) | ||
JPH0343599Y2 (en) | ||
JPH0814007B2 (en) | Agglomerated ore manufacturing method | |
JP3536681B2 (en) | Sinter production method | |
JPH0354397Y2 (en) | ||
JP2582711B2 (en) | Method for improving air permeability of sintered layer | |
SU418527A1 (en) | ||
JPS5952694B2 (en) | Sintered ore manufacturing method | |
SU1036774A1 (en) | Method for roasting iron ore pellets | |
JPH0711348A (en) | Operation of sintering | |
SU685897A1 (en) | Drum-type charge feeder | |
JPH0130894B2 (en) | ||
JP2805237B2 (en) | Iron ore sintering method and sintering pallet | |
US3168393A (en) | Method of sintering blast-furnace feed | |
JP2995775B2 (en) | How to supply bedding ore to sintering machine |