JPH01114691A - Iron ore fluidized-bed reducing device - Google Patents
Iron ore fluidized-bed reducing deviceInfo
- Publication number
- JPH01114691A JPH01114691A JP62269282A JP26928287A JPH01114691A JP H01114691 A JPH01114691 A JP H01114691A JP 62269282 A JP62269282 A JP 62269282A JP 26928287 A JP26928287 A JP 26928287A JP H01114691 A JPH01114691 A JP H01114691A
- Authority
- JP
- Japan
- Prior art keywords
- fluidized bed
- circulation
- scraper
- discharge port
- furnace
- 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
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims description 20
- 229910052742 iron Inorganic materials 0.000 title claims description 10
- 230000001603 reducing effect Effects 0.000 title abstract description 10
- 239000002245 particle Substances 0.000 claims abstract description 19
- 230000009467 reduction Effects 0.000 claims description 30
- 238000000034 method Methods 0.000 abstract description 9
- 239000011362 coarse particle Substances 0.000 abstract description 5
- 238000005054 agglomeration Methods 0.000 abstract description 4
- 230000002776 aggregation Effects 0.000 abstract description 4
- 238000005192 partition Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract 3
- 238000004062 sedimentation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 8
- 239000002994 raw material Substances 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002966 varnish Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Crucibles And Fluidized-Bed Furnaces (AREA)
- Manufacture Of Iron (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、溶融還元法に使用する鉄鉱石の流動層予備還
元炉に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fluidized bed pre-reduction furnace for iron ore used in a smelting reduction process.
〔従来の技術）
鉄鉱石を還元して溶銑を製造するために、高炉を使用す
る方法、シャフト炉で還元した鉄鉱石を電気炉で溶解す
る方法等が従来から採用されている。[Prior Art] In order to reduce iron ore to produce hot metal, methods such as using a blast furnace and melting iron ore reduced in a shaft furnace in an electric furnace have been adopted.
高炉を使用する方法において、熱源及び還元剤として多
量のコークスを使用し、鉄源である鉄鉱石は、炉内にお
ける通気性、還元性を向上させるために通常焼結され、
焼結鉱として高炉に装入されている。 ゛
したがって、高炉法には、多大な設備費は勿論のこと、
多くのエネルギー及び労働が必要となる。In the method using a blast furnace, a large amount of coke is used as a heat source and a reducing agent, and iron ore, which is an iron source, is usually sintered to improve air permeability and reducibility in the furnace.
It is charged into a blast furnace as sintered ore.゛Therefore, the blast furnace method requires not only large equipment costs but also
It requires a lot of energy and labor.
一方、シャフト炉による鉄鉱石の還元法では、鉄鉱石を
ペレット化する前処理を行うことが必要となり、また還
元剤、熱源として高価な天然ガス等を多量に消費すると
いう欠点がある。On the other hand, the method of reducing iron ore using a shaft furnace requires pretreatment to pelletize the iron ore, and has the disadvantage that it consumes a large amount of reducing agent and expensive natural gas as a heat source.
このような従来の溶銑製造技術に代わるものとして、溶
融還元法が注目を浴びている。この方法で使用する溶融
還元炉は、使用する原料に制約を受けることなく、より
小規模な設備により鉄系合金の溶湯を製造することを目
的として開発されたものである。As an alternative to such conventional hot metal production techniques, the smelting reduction method is attracting attention. The smelting reduction furnace used in this method was developed for the purpose of producing molten iron-based alloys using smaller-scale equipment without being restricted by the raw materials used.
本発明者等は、先に特開昭６１−６４８０７号公報にこ
のような溶融還元法の一つを提案した。The present inventors previously proposed one of such melt reduction methods in JP-A-61-64807.
更に本発明者らは特願昭６１−２８６５９９号において
、第４図図示の予備還元装置を提案した。Further, the present inventors proposed a preliminary reduction device shown in FIG. 4 in Japanese Patent Application No. 61-286599.
即ち流動層還元炉に外部粒子循環装置に付設するが、こ
の外部粒子循環装置の構成は、流動層還元炉６の上部に
設けれている出口にサイクロン３１を接続し、還元ガス
１１と同伴し飛散してきた細粒子を捕捉している。That is, an external particle circulation device is attached to the fluidized bed reduction furnace, and the configuration of this external particle circulation device is such that a cyclone 31 is connected to an outlet provided at the upper part of the fluidized bed reduction furnace 6, and the reducing gas 11 is entrained. It captures fine particles that are scattered.
サイクロン３１の下部には捕捉した粒子を一時溜めるホ
ッパ３２が接続され、このホッパ３２で一時貯え、所定
量を循環切出装置３３で流動層還元炉６に戻すものであ
る。A hopper 32 for temporarily storing captured particles is connected to the lower part of the cyclone 31. The hopper 32 temporarily stores the captured particles, and a predetermined amount is returned to the fluidized bed reduction furnace 6 by a circulation cutting device 33.
一方流動層還元炉６の炉内には複数のガス吹出し口°３
４．３５が形成されている。このガス吹出し口３４．３
５の中間部にバブリング流動層３６を形成し、このバブ
リング流動層３６内に前記外部粒子循環装置の循環出口
が設けられている。On the other hand, inside the fluidized bed reduction furnace 6, there are multiple gas outlets °3.
4.35 is formed. This gas outlet 34.3
A bubbling fluidized bed 36 is formed in the middle of the particle 5, and a circulation outlet of the external particle circulation device is provided in this bubbling fluidized bed 36.
また流動層還元炉６の炉底部に充填層３７が形成され、
充填層３７内に炉底吹き込みノズル３８が設けられてい
る。In addition, a packed bed 37 is formed at the bottom of the fluidized bed reduction furnace 6,
A furnace bottom blowing nozzle 38 is provided within the packed bed 37 .
図中３９は粉鉱石、石灰石等の原料２５を流動層還元炉
６に装入する為の切出弁、４０．４１．４２は還元ガス
の吹き出し量を調整するための流量調節弁、４３は細粒
状の還元鉱の切出弁、４４は粗粒状の還元鉱の切出弁で
ある。In the figure, 39 is a cut-off valve for charging the raw material 25 such as fine ore or limestone into the fluidized bed reduction furnace 6, 40, 41, and 42 are flow rate control valves for adjusting the amount of reducing gas blown out, and 43 is a A cut-out valve 44 for fine-grained reduced ore is a cut-out valve for coarse-grained reduced ore.
（発明が解決しようとする問題点）
本発明は流動層還元炉下部における非循環粒子の塊化、
棚吊りを防止する装置を提供するものである。(Problems to be Solved by the Invention) The present invention solves the problem of agglomeration of non-circulating particles in the lower part of the fluidized bed reduction reactor.
The present invention provides a device for preventing shelf hanging.
（問題点を解決するための手段）
本発明は還元鉱石を製造する設備において、流動層還元
炉に外部粒子循環装置を付設し、流動層還元炉の下部に
排出口を設け、循環ガスノズルと同心状に複数ブロック
に分割され、前記排出口に開口するスパークレーバーを
回転自在に設けたことを特徴とする。(Means for Solving the Problems) The present invention provides equipment for producing reduced ore, in which an external particle circulation device is attached to a fluidized bed reduction furnace, an exhaust port is provided at the lower part of the fluidized bed reduction furnace, and a circulating gas nozzle is concentric with the fluidized bed reduction furnace. The spark control device is characterized in that it is divided into a plurality of blocks in the shape of a shape, and is provided with a rotatable spark slave that opens at the discharge port.
以下図面について本発明を説明する。The invention will be explained below with reference to the drawings.
第１図は本発明の全体図、第２図は第１図の要部説明図
である。FIG. 1 is an overall view of the present invention, and FIG. 2 is an explanatory view of the main part of FIG. 1.
図において６は還元炉、１０は外部粒子循環装置の沈降
塔、２０は排出口を示し、導管２１はバ゛ ルブ４４を
介して排出ホンパー４５に導通ずる。In the figure, 6 is a reduction furnace, 10 is a settling tower of an external particle circulation system, 20 is a discharge port, and a conduit 21 is connected to a discharge pumper 45 via a valve 44.
１２はスフレバークで循環ガスノズル１１と同心状に設
けられ、回転自在である。１３は分散板である。Reference numeral 12 denotes a souffle bar, which is provided concentrically with the circulating gas nozzle 11 and is rotatable. 13 is a dispersion plate.
本発明のスクレーパーは第３図に示すように、枠体２１
に仕切り板２２を複数枚設けてブロックを形成し・循環
ガスノズルと同心円状に設けられる。２７はスクレーパ
ー回転子、２５はベルト、２６はモータである。３０は
循環ガス吹出ノズルである。又還元炉６の底部に排出口
２０を設け、導管２１はポツパー４５に連なる。As shown in FIG. 3, the scraper of the present invention has a frame 21
A plurality of partition plates 22 are provided to form a block and are provided concentrically with the circulating gas nozzle. 27 is a scraper rotor, 25 is a belt, and 26 is a motor. 30 is a circulating gas blowing nozzle. Further, a discharge port 20 is provided at the bottom of the reduction furnace 6, and a conduit 21 is connected to a popper 45.
所望の原料は流動層還元炉６と沈降塔ＩＯを循環流動し
つつ還元作用をうけるが、ｗｉ環流動層において原料中
に粗粒が混入した場合、還元炉６の底部に滞留し、これ
らが蓄積されて、粒子相互の塊化や棚吊りを生じ、操業
不安定の原因となる。The desired raw material undergoes a reduction action while being circulated through the fluidized bed reduction furnace 6 and the settling tower IO, but if coarse particles are mixed into the raw material in the circulating fluidized bed, they stay at the bottom of the reduction furnace 6, and these particles are This accumulates, causing mutual agglomeration and hanging of particles, causing operational instability.
本発明においては、還元炉の底部に排出口を設けて、ス
クレーパーを排出口に開口せしめるので、炉底の非循環
粗粒子をスクレーパーに捕捉し、モーター２６でスクレ
ーパーを回転して非ｍａｔ粒子をかき出すことができる
。In the present invention, a discharge port is provided at the bottom of the reduction furnace, and the scraper is opened to the discharge port, so that non-circulating coarse particles at the bottom of the furnace are captured by the scraper, and the scraper is rotated by the motor 26 to remove non-mat particles. It can be scraped out.
即ち、非循環粒子はスクレーパーでかき出されて、導管
に収納され、適当なタンミングでパルプ４４ａを開いて
、排出ホンパー４５に切り出される。バルブ４４ｂとの
併合により流動層還元炉の内圧を乱すこともない、スク
レーパーの運転は任意の周期でもよいし、連続的でもよ
い。That is, the non-circulating particles are scraped out with a scraper and stored in a conduit, and the pulp 44a is opened by appropriate tamping and cut out into the discharge pumper 45. The operation of the scraper, which does not disturb the internal pressure of the fluidized bed reduction furnace by merging with the valve 44b, may be performed at any period or may be continuous.
この運転は還元炉の操業と無関係であるので、還元作業
の生産性の低下がない。Since this operation is unrelated to the operation of the reduction furnace, there is no reduction in productivity of reduction work.
（発明の効果）
本発明によるときには任意のタイミングで非循環粒子の
排出を行い、操業の安定化を図ることができる。又操業
中における非循環粒子の排出が可能となり、生産性の低
下がない。(Effects of the Invention) According to the present invention, non-circulating particles can be discharged at any timing to stabilize operations. In addition, non-circulating particles can be discharged during operation, so there is no reduction in productivity.
第１図は本発明の全体図、第２図は第１図の部分説明図
、第３図は本発明の要部の斜視図、第４図は従来例の説
明図である。
６：還元炉、 １０：沈降塔、１２ニスクレー
パー、 ２０：排出口。
代理人 弁理士 茶 野 木 立 夫
６ ’ を動層濃元ｆ
１２ニスクレーパー（回転式）
％式％FIG. 1 is an overall view of the present invention, FIG. 2 is a partial explanatory view of FIG. 1, FIG. 3 is a perspective view of essential parts of the present invention, and FIG. 4 is an explanatory view of a conventional example. 6: reduction furnace, 10: settling tower, 12 varnish scraper, 20: discharge port. Agent Patent Attorney Tatsuo Chanoki 6' Dynamic layer concentration f12 varnish scraper (rotary type) % formula %
Claims (1)
粒子循環装置を付設し、流動層還元炉の下部に排出口を
設け、循環ガスノズルと同心状に複数ブロックに分割さ
れ、前記排出口に開口するスクレーパーを回転自在に設
けた鉄鉱石流動層還元装置。In equipment for producing reduced ore, an external particle circulation device is attached to a fluidized bed reduction furnace, a discharge port is provided at the bottom of the fluidized bed reduction furnace, and the gas is divided into multiple blocks concentrically with a circulating gas nozzle, and an opening is provided at the discharge port. Iron ore fluidized bed reduction equipment equipped with a rotatable scraper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62269282A JPH01114691A (en) | 1987-10-27 | 1987-10-27 | Iron ore fluidized-bed reducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62269282A JPH01114691A (en) | 1987-10-27 | 1987-10-27 | Iron ore fluidized-bed reducing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01114691A true JPH01114691A (en) | 1989-05-08 |
Family
ID=17470185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62269282A Pending JPH01114691A (en) | 1987-10-27 | 1987-10-27 | Iron ore fluidized-bed reducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01114691A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03183717A (en) * | 1989-12-13 | 1991-08-09 | Kawasaki Steel Corp | Method for operating smelting reduction apparatus and apparatus for transferring ore |
| CN112958294A (en) * | 2021-02-24 | 2021-06-15 | 北京天凯华尊科技有限公司 | Alumina powder overflow type desanding device and desanding method thereof |
-
1987
- 1987-10-27 JP JP62269282A patent/JPH01114691A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03183717A (en) * | 1989-12-13 | 1991-08-09 | Kawasaki Steel Corp | Method for operating smelting reduction apparatus and apparatus for transferring ore |
| CN112958294A (en) * | 2021-02-24 | 2021-06-15 | 北京天凯华尊科技有限公司 | Alumina powder overflow type desanding device and desanding method thereof |
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