JPH10225608A - Dust collector for electric furnace - Google Patents
Dust collector for electric furnaceInfo
- Publication number
- JPH10225608A JPH10225608A JP3200897A JP3200897A JPH10225608A JP H10225608 A JPH10225608 A JP H10225608A JP 3200897 A JP3200897 A JP 3200897A JP 3200897 A JP3200897 A JP 3200897A JP H10225608 A JPH10225608 A JP H10225608A
- Authority
- JP
- Japan
- Prior art keywords
- electric furnace
- dust collector
- furnace
- dust
- zinc
- 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
- 239000000428 dust Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 2
- 238000009461 vacuum packaging Methods 0.000 claims 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 abstract description 14
- 229910052725 zinc Inorganic materials 0.000 abstract description 13
- 239000011701 zinc Substances 0.000 abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 4
- 229910052742 iron Inorganic materials 0.000 abstract 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000008397 galvanized steel Substances 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 239000003517 fume Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 238000010309 melting process Methods 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000002844 melting Methods 0.000 description 2
- 230000000149 penetrating Effects 0.000 description 2
- 235000010724 Wisteria floribunda Nutrition 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010792 warming 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は亜鉛メッキ鋼板の鋼
屑を電気炉で溶解する場合に効率的かつ無公害で亜鉛の
回収処理を行うことができる電気炉用集塵装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collector for an electric furnace which can efficiently and non-polluting recover zinc when melting steel scrap from a galvanized steel sheet in an electric furnace.
【０００２】[0002]
【従来の技術】亜鉛メッキ鋼板は、例えば自動車用鋼板
などに多く利用されており、最近では亜鉛メッキ鋼板の
鋼屑が増大化する傾向にあるので、この鋼屑を再利用す
る必要性が高まってきている。そして、この亜鉛メッキ
鋼板の鋼屑を溶解するのに、従来はキュポラによるのを
普通としているが、キュポラの場合には設備が大型にな
るとともに、コークスを使用するためＣＯ2 やＮＯX や
ＳＯX の発生があり大気汚染の問題があった。また、排
ガスが高温であるため地球温暖化の助長要因にあなると
いう問題や、排ガス処理するにはガスの冷却設備が必要
となり処理コストが高くなる等の問題もあった。2. Description of the Related Art Galvanized steel sheets are widely used, for example, in steel sheets for automobiles. Recently, there is a tendency to increase the amount of steel chips of galvanized steel sheets. Is coming. Then, to dissolve the steel scrap of the galvanized steel sheet, conventionally has a plain from by cupola, but with equipment becomes large in the case of cupola, CO 2 for use coke and NO X and SO X was generated and there was a problem of air pollution. In addition, there is a problem that the exhaust gas has a high temperature, which is a factor contributing to global warming, and that a gas cooling facility is required for exhaust gas treatment, thereby increasing the processing cost.
【０００３】そこで、これらの問題点を解決するために
高周波電気炉で溶解することが検討されたが、電気炉の
場合には溶解処理中に亜鉛が電気炉の耐火物内部へ浸透
して炉体が電気的にアースしてしまうという現象が生
じ、この結果、耐火物の張り換えを強いられ多大の手間
と費用がかかり実用化には至っていないというのが現状
である。また、電気炉では亜鉛の十分な飛散除去処理を
行うことができず湯成分中に不純物として残留してしま
うという問題点もあった。[0003] In order to solve these problems, melting in a high-frequency electric furnace has been considered. In the case of an electric furnace, zinc penetrates into the refractory of the electric furnace during the melting process, and the furnace is melted. At present, a phenomenon occurs in which the body is electrically grounded, and as a result, renewal of refractory is forced, which requires much labor and cost, and has not yet been put to practical use. In addition, in the electric furnace, there is a problem that zinc cannot be satisfactorily scattered and removed, and impurities remain in the hot water component.
【０００４】[0004]
【発明が解決しようとする課題】本発明は上記のような
従来の問題点を解決して、従来のようにアース現象を生
ずることなく亜鉛メッキ鋼板の鋼屑を電気炉で効率よく
溶解することができ、また湯成分中に亜鉛や鉛などの不
純物を残留させることもなく高品質の溶湯を得ることが
でき、しかも溶解処理中に発生した有害な亜鉛ヒューム
や鉛ヒューム等を完全に回収処理することができる電気
炉用集塵装置を提供することを目的として完成されたも
のである。SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems and efficiently dissolves steel scrap from a galvanized steel sheet in an electric furnace without causing a grounding phenomenon unlike the prior art. And high-quality molten metal can be obtained without leaving impurities such as zinc and lead in the hot water component. In addition, harmful zinc fume and lead fume generated during the melting process are completely recovered. The present invention has been completed for the purpose of providing a dust collector for an electric furnace that can be used.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めになされた本発明の電気炉用集塵装置は、電気炉の上
面開口部を密閉する炉蓋を設け、集塵機の入口を前記炉
蓋に密閉式連結管を介して連通するとともに集塵機の出
口を減圧ポンプに密閉式連結管を介して連通し、電気炉
の集塵処理を電気炉と集塵機と減圧ポンプ間に形成され
た閉ループ内で減圧下の状態で行うようにしたことを特
徴とするものである。In order to solve the above-mentioned problems, a dust collector for an electric furnace according to the present invention is provided with a furnace lid for sealing an upper opening of an electric furnace, and an inlet of the dust collector is connected to the furnace. The lid is connected to the lid via a closed connection pipe, and the outlet of the dust collector is connected to the decompression pump via the closed connection pipe. And under a reduced pressure.
【０００６】[0006]
【発明の実施の形態】以下に、図面を参照しつつ本発明
の好ましい実施の形態を示す。図面は自動車用鋼板であ
る亜鉛メッキ鋼板の鋼屑を電気炉で溶解する場合を示す
ものであって、図中１は高周波電気炉、２はバグフィル
ター式の集塵機、３は吸引ポンプであり、本発明におい
ては前記電気炉１の上面開口部は炉蓋４により密閉状態
が確保できるよう構成されており、また集塵機２の入口
は該炉蓋４に密閉式連結管５ａを介して連通されている
とともに集塵機２の出口は減圧ポンプ３に密閉式連結管
５ｂを介して連通されており、電気炉１の集塵処理を電
気炉１と集塵機２と減圧ポンプ３間に形成された閉ルー
プ５内で減圧下の状態で行うように構成されたものとな
っている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. The drawing shows a case where steel scrap of a galvanized steel plate, which is a steel plate for an automobile, is melted in an electric furnace, where 1 is a high-frequency electric furnace, 2 is a bag filter type dust collector, 3 is a suction pump, In the present invention, the upper opening of the electric furnace 1 is configured so that a closed state can be ensured by the furnace lid 4, and the inlet of the dust collector 2 is connected to the furnace lid 4 via a closed connection pipe 5 a. In addition, the outlet of the dust collector 2 is connected to the vacuum pump 3 via a closed connection pipe 5b, and the dust collecting process of the electric furnace 1 is performed in a closed loop 5 formed between the electric furnace 1, the dust collector 2 and the vacuum pump 3. At a reduced pressure.
【０００７】なお、６は電気炉１に設けられた減圧解除
バルブ、７ａは密閉式連結管５ａに設けられた切替えバ
ルブであり、該切替えバルブ７ａは材料の投入時等に使
用される大気圧用の集塵機（図示せず）の連結管にある
切替えバルブ７ｂと連動するよう構成されている。ま
た、８は集塵機２の下部に設けられた真空パック方式の
亜鉛ダストの回収装置、８ａはロータリーフィーダの上
部に設けられたダスト排出バルブ、９ａは前記回収装置
８に設けられた減圧解除バルブであり、該減圧解除バル
ブ９ａは集塵機２と回収装置８との連結管上に設けられ
た減圧バルブ９ｂと連動するよう構成されている。ま
た、１０は密閉式連結管５ｂ上に設けられた減圧ポンプ
３に連動する遮断バルブである。Reference numeral 6 denotes a decompression release valve provided in the electric furnace 1, and 7a denotes a switching valve provided in the closed connection pipe 5a, and the switching valve 7a is an atmospheric pressure used when charging a material or the like. It is configured to interlock with a switching valve 7b provided in a connecting pipe of a dust collector (not shown) for use. Numeral 8 denotes a vacuum dust collecting device provided at a lower portion of the dust collector 2, 8a denotes a dust discharging valve provided at an upper portion of the rotary feeder, and 9a denotes a decompression release valve provided at the collecting device 8. The decompression release valve 9a is configured to operate in conjunction with a decompression valve 9b provided on a connecting pipe between the dust collector 2 and the recovery device 8. Reference numeral 10 denotes a shut-off valve that is interlocked with the pressure reducing pump 3 provided on the closed connection pipe 5b.
【０００８】このように構成されたものにおいては、電
気炉の集塵処理を電気炉１と集塵機２と減圧ポンプ３間
に形成された閉ループ５内で減圧下の状態で行うように
したので、ガスの吸引量は電気炉１で発生するガス量を
若干上回る程度でよく、従来のリング式フードによる場
合に比べて約１／２０ですみ、この結果、集塵機２の容
量も同様に約１／２０の規模のものでよく大幅な装置の
小型化、および省エネ化が図れることとなる。しかも、
閉ループ５であるので亜鉛メッキ鋼板中に含まれる有害
な亜鉛ヒュームや鉛ヒュームの外部への漏洩もなく、作
業環境の改善が図れるとともに、前記の真空パック方式
の亜鉛ダストの回収装置８により完璧な亜鉛・鉛の回収
作業も行えることとなる。[0008] In the above-mentioned structure, the dust collecting process of the electric furnace is performed under reduced pressure in the closed loop 5 formed between the electric furnace 1, the dust collector 2 and the pressure reducing pump 3. The amount of gas suction may be slightly larger than the amount of gas generated in the electric furnace 1 and is only about 1/20 of that of the conventional ring-type hood. As a result, the capacity of the dust collector 2 is also about 1/20. The size is about 20 and the size of the device can be greatly reduced and energy saving can be achieved. Moreover,
The closed loop 5 prevents harmful zinc fumes and lead fumes contained in the galvanized steel sheet from leaking to the outside, thus improving the working environment and perfecting the vacuum-packed zinc dust recovery device 8 described above. Recovery work of zinc and lead will also be possible.
【０００９】また、本発明は前記閉ループ５を利用して
減圧下の状態で集塵処理を行うようにしたので、電気炉
１における溶解処理も従来が亜鉛の沸点（約９３０℃）
以上の高温下で行っていたのに対し、約１００℃以下の
低温下で効率よく行うことができ、亜鉛が炉の耐火物中
へ浸透する現象を的確に防止できるとともに溶湯中の不
純物も極力少なくすることができる。しかも、前記のよ
うに電気炉１より生ずる排ガスの温度も低くなるため吸
引ガスに奪われる熱量もほとんどなくなり、電気炉１の
熱効率の大幅な向上が達成でき、また従来のように集塵
機２の直前において被処理ガスの冷却処理を施す必要が
なくなり冷却塔の設置が不要となるとともに集塵機２の
効率的で長期間にわたる安定した稼働が行えることとな
る。Further, in the present invention, the dust collection process is performed under reduced pressure using the closed loop 5, so that the melting process in the electric furnace 1 is conventionally performed at the boiling point of zinc (about 930 ° C.).
In contrast to the above high temperature, it can be performed efficiently at a low temperature of about 100 ° C or less, preventing zinc from penetrating into the refractory of the furnace accurately and reducing impurities in the molten metal as much as possible. Can be reduced. In addition, as described above, the temperature of the exhaust gas generated from the electric furnace 1 is also reduced, so that the amount of heat taken by the suction gas is almost eliminated, and the thermal efficiency of the electric furnace 1 can be greatly improved. In this case, there is no need to perform a cooling process on the gas to be treated, so that a cooling tower is not required, and the dust collector 2 can be operated efficiently and stably for a long period of time.
【００１０】[0010]
【発明の効果】以上の説明からも明らかなように、本発
明は従来のようにアース現象を生ずることなく亜鉛メッ
キ鋼板の鋼屑を電気炉で効率よく溶解することができ、
また湯成分中に亜鉛や鉛などの不純物を残留させること
もなく高品質の溶湯を得ることができ、しかも溶解処理
中に発生した有害な亜鉛ヒュームや鉛ヒューム等を完全
に回収処理することができるものである。よって本発明
は従来の問題点を一掃した電気炉用集塵装置として、産
業の発展に寄与するところは極めて大である。As is apparent from the above description, according to the present invention, it is possible to efficiently dissolve steel scraps of galvanized steel sheets in an electric furnace without causing a grounding phenomenon unlike the prior art.
In addition, high quality molten metal can be obtained without leaving impurities such as zinc and lead in the hot water component, and harmful zinc fume and lead fume generated during the melting process can be completely recovered. You can do it. Therefore, the present invention greatly contributes to industrial development as a dust collector for an electric furnace which has eliminated the conventional problems.
【図１】本発明の実施例を示す全体図である。FIG. 1 is an overall view showing an embodiment of the present invention.
１ 電気炉 ２ 集塵機 ３ 減圧ポンプ ４ 炉蓋 ５ 閉ループ 5a 密閉式連結管 5b 密閉式連結管 ８ 回収装置 DESCRIPTION OF SYMBOLS 1 Electric furnace 2 Dust collector 3 Decompression pump 4 Furnace lid 5 Closed loop 5a Closed connection pipe 5b Closed connection pipe 8 Collection device
─────────────────────────────────────────────────────
────────────────────────────────────────────────── ───
【手続補正書】[Procedure amendment]
【提出日】平成９年９月２日[Submission date] September 2, 1997
【手続補正１】[Procedure amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００９[Correction target item name] 0009
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００９】また、本発明は前記閉ループ５を利用して
減圧下の状態で集塵処理を行うようにしたので、電気炉
１における溶解処理も従来に比べはるかに低い温度で行
うことができ、亜鉛が炉の耐火物中へ浸透する現象を的
確に防止できるとともに溶湯中の不純物も極力少なくす
ることができる。しかも、前記のように電気炉１より生
ずる排ガスの温度も低くなるため吸引ガスに奪われる熱
量もほとんどなくなり、電気炉１の熱効率の大幅な向上
が達成でき、また従来のように集塵機２の直前において
被処理ガスの冷却処理を施す必要がなくなり冷却塔の設
置が不要となるとともに集塵機２の効率的で長期間にわ
たる安定した稼働が行えることとなる。Further, in the present invention, the dust collection process is performed under reduced pressure by using the closed loop 5, so that the melting process in the electric furnace 1 is performed at a much lower temperature than the conventional one. Thus, it is possible to accurately prevent the zinc from penetrating into the refractory of the furnace, and to minimize the impurities in the molten metal as much as possible. Further, as described above, the temperature of the exhaust gas generated from the electric furnace 1 is also reduced, so that the amount of heat taken by the suction gas is almost eliminated, so that the thermal efficiency of the electric furnace 1 can be greatly improved. In this case, there is no need to perform a cooling process on the gas to be treated, so that a cooling tower is not required, and the dust collector 2 can be operated efficiently and stably for a long period of time.
フロントページの続き (72)発明者 服部 英美 三重県鈴鹿市南玉垣町5520番地 富士電機 株式会社鈴鹿電機製作所内 (72)発明者 山本 伸也 愛知県額田郡幸田町大字坂崎字西長根１番 地 新東ダストコレクタ株式会社幸田工場 内Continued on the front page (72) Inventor Hidemi Hattori 5520 Minamitamagaki-cho, Suzuka-shi, Mie Prefecture Fuji Electric Suzuka Electric Works, Ltd. East Dust Collector Co., Ltd.
Claims (2)
(4) を設け、集塵機(2) の入口を前記炉蓋(4) に密閉式
連結管(5a)を介して連通するとともに集塵機(2) の出口
を減圧ポンプ(3) に密閉式連結管(5b)を介して連通し、
電気炉の集塵処理を電気炉(1) と集塵機(2) と減圧ポン
プ(3) 間に形成された閉ループ(5) 内で減圧下の状態で
行うようにしたことを特徴とする電気炉用集塵装置。1. A furnace lid for sealing an upper opening of an electric furnace (1).
(4), the inlet of the dust collector (2) communicates with the furnace lid (4) through the hermetic connection pipe (5a), and the outlet of the dust collector (2) connects to the decompression pump (3). Communicating through (5b),
An electric furnace, wherein the dust collection process of the electric furnace is performed under reduced pressure in a closed loop (5) formed between the electric furnace (1), the dust collector (2), and the vacuum pump (3). For dust collector.
回収装置(8) が設けられている請求項１に記載の電気炉
用集塵装置。2. A dust collector for an electric furnace according to claim 1, wherein the dust collector (2) is provided with a dust collecting device (8) of a vacuum packing type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03200897A JP3476327B2 (en) | 1997-02-17 | 1997-02-17 | Dust collector for electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03200897A JP3476327B2 (en) | 1997-02-17 | 1997-02-17 | Dust collector for electric furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10225608A true JPH10225608A (en) | 1998-08-25 |
| JP3476327B2 JP3476327B2 (en) | 2003-12-10 |
Family
ID=12346854
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03200897A Expired - Lifetime JP3476327B2 (en) | 1997-02-17 | 1997-02-17 | Dust collector for electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3476327B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003305326A (en) * | 2002-04-16 | 2003-10-28 | Mitsubishi Chemicals Corp | Discharge method for fine powder from dry dust collector |
| JP2007078243A (en) * | 2005-09-14 | 2007-03-29 | Aizakku T:Kk | Industrial dust collector |
| CN102748954A (en) * | 2012-06-20 | 2012-10-24 | 青海宜化化工有限责任公司 | Calcium carbide furnace waste gas flue with dust remover |
| CN112444135A (en) * | 2020-10-30 | 2021-03-05 | 四川凤生纸业科技股份有限公司 | Process and system for purifying flue gas discharged by alkali furnace |
-
1997
- 1997-02-17 JP JP03200897A patent/JP3476327B2/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003305326A (en) * | 2002-04-16 | 2003-10-28 | Mitsubishi Chemicals Corp | Discharge method for fine powder from dry dust collector |
| JP2007078243A (en) * | 2005-09-14 | 2007-03-29 | Aizakku T:Kk | Industrial dust collector |
| CN102748954A (en) * | 2012-06-20 | 2012-10-24 | 青海宜化化工有限责任公司 | Calcium carbide furnace waste gas flue with dust remover |
| CN112444135A (en) * | 2020-10-30 | 2021-03-05 | 四川凤生纸业科技股份有限公司 | Process and system for purifying flue gas discharged by alkali furnace |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3476327B2 (en) | 2003-12-10 |
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