JPS63207988A - Scrap preheating method - Google Patents
Scrap preheating methodInfo
- Publication number
- JPS63207988A JPS63207988A JP62038683A JP3868387A JPS63207988A JP S63207988 A JPS63207988 A JP S63207988A JP 62038683 A JP62038683 A JP 62038683A JP 3868387 A JP3868387 A JP 3868387A JP S63207988 A JPS63207988 A JP S63207988A
- Authority
- JP
- Japan
- Prior art keywords
- preheating
- scrap
- damper
- white smoke
- preheating device
- 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
Links
- 238000000034 method Methods 0.000 title claims description 8
- 239000000779 smoke Substances 0.000 claims description 14
- 239000000428 dust Substances 0.000 claims description 11
- 239000007789 gas Substances 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- IKHGUXGNUITLKF-XPULMUKRSA-N acetaldehyde Chemical compound [14CH]([14CH3])=O IKHGUXGNUITLKF-XPULMUKRSA-N 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- -1 mill press Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000002699 waste material Substances 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
- Y02P10/25—Process efficiency
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明はスクラップ予熱方法に関する。[Detailed description of the invention] <Industrial application field> The present invention relates to a scrap preheating method.
金属材料を電気炉で溶融する際に高温の排ガスが発生す
る。該排ガスギそのまま放出したのでは熱エネルギの著
しい無駄である。そこで、原料となるスクラップを該排
ガスで予熱することが行ないる。High-temperature exhaust gas is generated when metal materials are melted in an electric furnace. Emitting the exhaust gas as it is would be a significant waste of thermal energy. Therefore, the scrap used as the raw material is preheated with the exhaust gas.
ところで、予熱装置を使用してダライ粉やダライプレス
更にはシュレッダ−等の塗料や油分を含む鉄屑からなる
低級スクラップを予熱すると、白煙が発生する。該白煙
は、油蒸気を含む液状ミストであり、多くの場合に硫化
水素やアセトアルデヒド更にはスチレン等の悪臭成分を
も同伴するものである。そして該白煙は、予熱中に発生
するだけでなく、予熱終了後においてもその一部が予熱
装置に残存し、とりわけ予熱終了後に予熱装置のフード
を開けると、予熱されたスクラップが酸化雰囲気にさら
されるため、一時的に多量に発生する。いうまでもなく
、予熱終了後における上記のような白煙も著しく作業環
境を悪化させるので、その有効な処理対策が要請される
。By the way, when a preheating device is used to preheat low-grade scrap made of milling powder, mill press, or iron scraps containing paint or oil from a shredder or the like, white smoke is generated. The white smoke is a liquid mist containing oil vapor, and is often accompanied by hydrogen sulfide, acetaldehyde, and even malodorous components such as styrene. The white smoke not only occurs during preheating, but some of it remains in the preheating device even after preheating is finished, and especially when the hood of the preheating device is opened after preheating, the preheated scraps are exposed to an oxidizing atmosphere. Due to exposure, large amounts occur temporarily. Needless to say, the above-mentioned white smoke after preheating also significantly deteriorates the working environment, so effective measures are required to deal with it.
本発明はかかる要請に応えるスクラップ予熱方法に関す
るものである。The present invention relates to a scrap preheating method that meets such demands.
〈従来の技術、その問題点〉
従来、電気炉からの排ガスでスクラップを予熱＋１坑＾
＾襦糾舘し賦イ 罵麩出出占篇研儒［ず圧るものは提案
されているが（特開昭５７−８０１８０．特開昭５８−
６４４８３等）、予熱終了後における白煙の捕集対策に
係るものは未だ提案されていない。<Conventional technology and its problems> Conventionally, scrap was preheated using exhaust gas from an electric furnace + 1 well^
＾It has been proposed to put pressure on the people who are trying to get rid of it.
No. 64483, etc.) have not yet been proposed for collecting white smoke after preheating.
しかし、予熱終了後、予熱装置のフードを開いて、予熱
後のスクラップが充填されているパケットをクレーンで
吊り上げたり或は台車で搬送しようとする際に放出され
る白煙も、作業環境上、大きな問題となっているのが実
情である。However, the white smoke emitted when the hood of the preheating device is opened after preheating is completed and the packets filled with preheated scrap are lifted by a crane or transported by a trolley are also a problem due to the work environment. The reality is that this is a big problem.
〈発明が解決しようとする問題点、その解決手段〉
本発明は叙上の如き従来の問題点を解決するスクラップ
予熱方法に関するものである。<Problems to be Solved by the Invention and Means for Solving the Problems> The present invention relates to a scrap preheating method that solves the conventional problems as described above.
しかして本発明は、
電気炉からの排ガスを利用してスクラップを予熱するに
際し、予熱終了後に所定時間、予熱装置における白煙を
該予熱装置の入口側から集塵装置へと吸引排気すること
を特徴とするスクラップ予熱方法に係る。Therefore, when preheating scrap using exhaust gas from an electric furnace, the present invention includes a method of sucking and exhausting white smoke in the preheating device from the inlet side of the preheating device to a dust collector for a predetermined period of time after the completion of preheating. The present invention relates to a characteristic scrap preheating method.
以下、図面に基いて本発明の構成を更に詳細に説明する
。Hereinafter, the configuration of the present invention will be explained in more detail based on the drawings.
〈実施例〉
第１図は本発明の一実施状態を示す系統図である。電気
炉１１からの排ガスが燃焼塔２１で後燃焼された後、ダ
ンパ３１を介してブロア４１により集塵装置５１へと吸
引排気され、その一方、燃焼塔２１で後燃焼された排ガ
スの全部又は一部がダンパ３２を介して予熱装置６１に
至り、予熱後の排ガスがダンパ３３を介してブロア４１
により集塵装置５１へと吸引排気される構成となってい
る。この場合、予熱装置６１は、スクラップＡが充填さ
れるパケット６２、該パケット６２に対して昇降するこ
とにより開閉するフード６３、及びこれらを囲繞するベ
ッセル６４を備え、フード６３は入口側のダンパ３２と
連通し、またベッセル６４は出口側のダンパ３３と連通
している。<Example> FIG. 1 is a system diagram showing one implementation state of the present invention. After the exhaust gas from the electric furnace 11 is post-combusted in the combustion tower 21, it is sucked and exhausted to the dust collector 51 by the blower 41 via the damper 31, and on the other hand, all or A portion of the exhaust gas passes through the damper 32 to the preheating device 61, and the preheated exhaust gas passes through the damper 33 to the blower 41.
The structure is such that the dust is sucked and exhausted to the dust collector 51. In this case, the preheating device 61 includes a packet 62 filled with scrap A, a hood 63 that opens and closes by moving up and down with respect to the packet 62, and a vessel 64 surrounding these. The vessel 64 also communicates with the damper 33 on the exit side.
上記系統図において、スクラップＡを予熱しない場合、
ダンパ３１を開またダンパ３２，３３を閉の状態とし、
電気炉１１からの排ガスを、燃焼塔２１→ダンパ３１→
ブロア４１→集塵装置５１の順で吸引排気する。その一
方、スクラップＡを予熱する場合には例えば、ダンパ３
１を閉またダンパ３２．３３を開そしてフード６３を下
降させて閉の状態とし、電気炉１１からの排ガスを、燃
焼塔２１→ダンパ３２→予熱装置６２（フード６３→バ
ケツ）６２−スクラップＡ→ベッセル６４）→ダンパ３
３→ブロア４１→集塵装置５１の順で吸引排気する。In the above system diagram, if scrap A is not preheated,
Open the damper 31 and close the dampers 32 and 33,
The exhaust gas from the electric furnace 11 is transferred to the combustion tower 21 → damper 31 →
The air is sucked and exhausted in the order of the blower 41 and the dust collector 51. On the other hand, when preheating scrap A, for example, damper 3
The dampers 32 and 33 which were closed at 1 are opened, and the hood 63 is lowered to close it, and the exhaust gas from the electric furnace 11 is transferred from the combustion tower 21 to the damper 32 to the preheating device 62 (hood 63 to bucket) 62 to scrap A. → Vessel 64) → Damper 3
3→blower 41→dust collector 51 in the order of suction and exhaust.
上記のようにスクラップＡを予熱終了後、本発明では、
ダンパ３１，３２を開またダンパ３３を閉そして好まし
くはフード６３を上昇させて開の状態とし、通常は２〜
３分間、予熱装置ｉ６１に残存する白煙やフード６３を
開いてスクラップＡが酸化雰囲気にさらされることによ
り一時的に多量に発生する白煙を、予熱装置６１→ダン
パ３２→燃焼塔２１→ダンパ３１→ブロア４１→集塵装
置５１の順で吸引排気するのである。After preheating the scrap A as described above, in the present invention,
The dampers 31 and 32 are opened, the damper 33 is closed, and the hood 63 is preferably raised to the open state.
For 3 minutes, white smoke remaining in the preheating device i61 and a large amount of white smoke temporarily generated by opening the hood 63 and exposing the scrap A to an oxidizing atmosphere are removed from the preheating device 61 → damper 32 → combustion tower 21 → damper. 31→blower 41→dust collector 51 in this order.
かくして、スクラップＡを予熱中の白煙や予熱終了後の
白煙を、最終的には集塵装置５１で無害メクラ−２プＡ
の予熱に際して、各ダンパ３１，３２．３３の開度調整
により、燃焼塔２１で後燃焼された排ガスの一部術予熱
装置６１へと分岐することができ、また予熱後の排ガス
を一旦電気炉ｌｌへと返送することもできる。In this way, the white smoke while preheating the scrap A and the white smoke after the preheating is finally collected by the dust collector 51 into the harmless metal scrap A.
During preheating, by adjusting the opening of each damper 31, 32, 33, part of the exhaust gas post-combusted in the combustion tower 21 can be branched to the preheating device 61. You can also send it back to ll.
〈発明の効果〉
以上説明した通りであるから、本発明には、スクラップ
予熱終了後の白煙をも無害化して作業環境を良好に保つ
効果がある。<Effects of the Invention> As explained above, the present invention has the effect of rendering white smoke after scrap preheating harmless and maintaining a good working environment.
第１図は本発明の一実施状態を示す系統図である。
１１・・電気炉、２１−φ燃焼塔
３１〜３３＠・ダンパ、４１・φブロア５１・・集塵装
置、６１・・予熱装置
６２・・パケット、６３舎・フード
６４・・ベッセル
Ａ・・スクラップFIG. 1 is a system diagram showing one implementation state of the present invention. 11...Electric furnace, 21-φ combustion tower 31-33@・Damper, 41・φBlower 51...Dust collector, 61...Preheating device 62...Packet, 63 building・Hood 64...Vessel A... scrap
Claims (1)
るに際し、予熱終了後に所定時間、予熱装置における白
煙を該予熱装置の入口側から集塵装置へと吸引排気する
ことを特徴とするスクラップ予熱方法。 ２、予熱装置のフードを開いた状態で白煙を該予熱装置
の入口側から集塵装置へと吸引排気する特許請求の範囲
第１項記載のスクラップ予熱方法。[Claims] 1. When preheating scrap using exhaust gas from an electric furnace, white smoke in the preheating device is sucked and exhausted from the inlet side of the preheating device to a dust collector for a predetermined period of time after completion of preheating. A scrap preheating method characterized by: 2. The scrap preheating method according to claim 1, wherein white smoke is sucked and exhausted from the inlet side of the preheating device to the dust collector while the hood of the preheating device is open.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62038683A JPH0721390B2 (en) | 1987-02-20 | 1987-02-20 | Scrap preheating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62038683A JPH0721390B2 (en) | 1987-02-20 | 1987-02-20 | Scrap preheating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63207988A true JPS63207988A (en) | 1988-08-29 |
| JPH0721390B2 JPH0721390B2 (en) | 1995-03-08 |
Family
ID=12532086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62038683A Expired - Lifetime JPH0721390B2 (en) | 1987-02-20 | 1987-02-20 | Scrap preheating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0721390B2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56137075A (en) * | 1980-03-27 | 1981-10-26 | Ishikawajima Harima Heavy Ind | Method of and apparatus for treating scrap preheating gas |
| JPS6219688A (en) * | 1985-07-18 | 1987-01-28 | 合同製鉄株式会社 | Method and device for treating previously preheated gas of scrap for electric steel-making furnace |
-
1987
- 1987-02-20 JP JP62038683A patent/JPH0721390B2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56137075A (en) * | 1980-03-27 | 1981-10-26 | Ishikawajima Harima Heavy Ind | Method of and apparatus for treating scrap preheating gas |
| JPS6219688A (en) * | 1985-07-18 | 1987-01-28 | 合同製鉄株式会社 | Method and device for treating previously preheated gas of scrap for electric steel-making furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0721390B2 (en) | 1995-03-08 |
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