JPH09227963A - Dust treating device - Google Patents
Dust treating deviceInfo
- Publication number
- JPH09227963A JPH09227963A JP5697096A JP5697096A JPH09227963A JP H09227963 A JPH09227963 A JP H09227963A JP 5697096 A JP5697096 A JP 5697096A JP 5697096 A JP5697096 A JP 5697096A JP H09227963 A JPH09227963 A JP H09227963A
- Authority
- JP
- Japan
- Prior art keywords
- dust
- cooling
- filter
- gases
- providing
- 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
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、例えば製鋼用アー
ク炉等の廃ガス系路に設けられている集塵装置で捕捉さ
れたダストから鉛，亜鉛等の金属，その他の物質を分離
回収するダスト処理装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention separates and collects metals such as lead and zinc and other substances from dust captured by a dust collector provided in a waste gas system passage of, for example, an arc furnace for steelmaking. The present invention relates to a dust processing device.
【０００２】[0002]
【従来の技術】製鋼工場における電気炉やスクラップ予
熱装置等の廃ガス系路およびその集塵装置には多量のダ
ストが堆積するが、そのダスト中には酸化鉛（Ｐｂ
Ｏ），酸化亜鉛（ＺｎＯ），或いは酸化鉄（Ｆe2Ｏ3，
ＦeＯ）等の金属酸化物が含まれている。従ってこのダ
ストをそのまま廃棄したのでは資源の無駄および環境破
壊に継がるおそれがあるので、これらの金属、その他の
有効成分をダストから分離回収することが望まれる。2. Description of the Related Art A large amount of dust accumulates on waste gas lines such as electric furnaces and scrap preheating devices in steelmaking plants and its dust collectors, but lead oxide (Pb) is contained in the dust.
O), zinc oxide (ZnO), or iron oxide (F e2 O 3 ,
Fe O) and other metal oxides are included. Therefore, if this dust is discarded as it is, it may lead to waste of resources and environmental damage. Therefore, it is desirable to separate and recover these metals and other effective components from the dust.
【０００３】従来、特開平４−２２５８７６号公報，実
開平５−３０１４９号公報等には、ダストから鉄，亜
鉛，鉛等の金属を回収する真空加熱装置として、密閉系
の容器と、該容器に断熱材で囲まれて形成されて処理室
と、該処理室に装備されたヒータと、該容器に接続され
た該処理室を真空雰囲気にする真空ポンプと、該容器と
該真空ポンプとの間に介装された凝縮器とを備えるもの
が提案されている。しかしこの従来装置では、実際上、
亜鉛や鉛の回収率が低かったり、或いは処理容器に酸化
鉄，酸化亜鉛，酸化鉛が残留したりして、ダストから
鉄，亜鉛，鉛等の金属を高収率で安定回収できないとい
う欠点がある。Conventionally, Japanese Patent Laid-Open No. 4-225876, Japanese Utility Model Laid-Open No. 5-30149 and the like disclose a closed container and a container as a vacuum heating device for recovering metals such as iron, zinc and lead from dust. A processing chamber formed by being surrounded by a heat insulating material, a heater provided in the processing chamber, a vacuum pump connected to the container to make the processing chamber a vacuum atmosphere, and the container and the vacuum pump. It has been proposed to have a condenser interposed therebetween. However, in this conventional device,
The recovery rate of zinc and lead is low, or iron oxide, zinc oxide, and lead oxide remain in the processing container, which makes it difficult to stably recover metals such as iron, zinc, and lead from dust in a high yield. is there.
【０００４】また、従来装置では有害な芳香族塩素化合
物が再生成され、それが捕集されないで大気中に排出さ
れるおそれがあったので環境問題となる欠点があった。Further, in the conventional apparatus, a harmful aromatic chlorine compound is regenerated and may be discharged into the atmosphere without being collected, so that it has a drawback of becoming an environmental problem.
【０００５】[0005]
【発明が解決しようとする課題】そこで本発明は、ダス
トからの金属回収効率を向上させると共に、有害物質の
再生成，排出を可及的に抑制し得るダスト処理装置を提
供しようとするものである。SUMMARY OF THE INVENTION Therefore, the present invention is intended to provide a dust treatment apparatus capable of improving the metal recovery efficiency from dust and suppressing the regeneration and discharge of harmful substances as much as possible. is there.
【０００６】[0006]
【課題を解決するための手段】そのために本発明のダス
ト処理装置は、処理室に収容したダストを真空または還
元雰囲気中で加熱し該ダスト中に含まれる酸化亜鉛，酸
化鉛等の金属酸化物を還元し金属微粒子として蒸発させ
ると共に、該処理室から吸引したガスをその回収系路に
設けられた冷却・濾過器に通すことにより該金属微粒子
を分離回収することを特徴とする。また本発明は、上記
ダスト処理装置における回収系路に設けられたバグフィ
ルターの一次側に粉末状炭素等の吸着材を投入する手段
を設けたことを特徴とする。また本発明は、上記ダスト
処理装置における回収系路に設けられたバグフィルター
の二次側に白金系，チタン・バナジウム系等の貴金属か
らなる触媒を設けて芳香族塩素化合物を除去するように
したことを特徴とする。さらに本発明は、上記ダスト処
理装置に記載の冷却・濾過器は、濾過網にガスを透過さ
せるものであると共に、非揮発性の冷却油を該瀘過網に
向けて噴霧するものを特徴とする。To this end, the dust processing apparatus of the present invention is designed so that the dust contained in the processing chamber is heated in a vacuum or in a reducing atmosphere to contain metal oxides such as zinc oxide and lead oxide. Is reduced and evaporated as metal fine particles, and the gas sucked from the processing chamber is passed through a cooling / filtering device provided in the recovery system passage to separate and recover the metal fine particles. Further, the present invention is characterized in that a means for charging an adsorbent such as powdery carbon or the like is provided on the primary side of the bag filter provided in the recovery system passage in the dust processing apparatus. Further, according to the present invention, a catalyst made of a noble metal such as platinum or titanium / vanadium is provided on the secondary side of the bag filter provided in the recovery system passage of the dust treatment device to remove the aromatic chlorine compound. It is characterized by Furthermore, the present invention is characterized in that the cooling / filtering device described in the above dust processing device is one that allows gas to permeate through the filtering net and sprays a non-volatile cooling oil toward the filtering net. To do.
【０００７】[0007]
【発明の実施の形態】次に図面に従い本発明の実施の形
態を説明する。図１にこのダスト処理装置の配管系統図
を示し、図中１は処理室、２は該処理室１内に設けられ
たポット、３は該ポット２に容れられた電炉ダスト、４
は該ダスト３を加熱するため処理室１内に設けられたヒ
ータ、５は該処理室１内にＨ2 ，ＣＯ等の還元剤を供給
するために設けられた還元剤貯留タンクである。７は該
処理室１中のガスの回収系路８に設けられた油滴噴霧式
の冷却・濾過器、９は該冷却・濾過器７の後段に設けら
れたバグフィルターである。また、１０は該バグフィル
ター９の一次側で回収系路８中を流れるガス中に粉末状
炭素等の吸着剤を投入するために設けられたホッパ、１
１はバグフィルター９の二次側に設けられた白金系，チ
タン・バナジウム系等の貴金属製の網体からなる触媒、
１２は回収系路８の至端部に設けられた真空吸引ポンプ
である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a piping system diagram of this dust processing apparatus. In the figure, 1 is a processing chamber, 2 is a pot provided in the processing chamber 1, 3 is electric furnace dust contained in the pot 2, 4
Is a heater provided in the processing chamber 1 for heating the dust 3, and 5 is a reducing agent storage tank provided for supplying the reducing agent such as H 2 and CO into the processing chamber 1. Reference numeral 7 is an oil droplet spray type cooling / filtering device provided in the gas recovery system passage 8 in the processing chamber 1, and 9 is a bag filter provided in the subsequent stage of the cooling / filtering device 7. Further, 10 is a hopper provided for introducing an adsorbent such as powdery carbon into the gas flowing in the recovery system passage 8 on the primary side of the bag filter 9.
Reference numeral 1 denotes a catalyst made of a net body made of a noble metal such as platinum-based, titanium-vanadium-based, etc., provided on the secondary side of the bag filter 9,
Reference numeral 12 is a vacuum suction pump provided at the extreme end of the recovery system passage 8.
【０００８】冷却・濾過器７は、図２に示したように、
縦筒状の器体１５内に金網からなる濾過網１６が水平に
張設され、該濾過網１６の下方側壁にガス流入口１７を
開設し、上方側壁にガス流出口１８を開設すると共に、
該濾過網１６の上方および下方にノズル１９，２０を設
け、エンジンオイル，油圧作動用油等の非揮発性の冷却
油をポンプ２１によって該器体１５中から吸引して各ノ
ズル１９，２０に循環させ該各ノズル１９，２０から瀘
過網１６に向けてその冷却油を噴霧できるように構成さ
れている。なお２２は器体１５内底部に設けられたスト
レーナである。The cooling / filtering device 7, as shown in FIG.
A filter net 16 made of a wire net is horizontally stretched in a vertical tubular container 15, a gas inlet 17 is opened on a lower side wall of the filter net 16, and a gas outlet 18 is opened on an upper side wall thereof.
Nozzles 19 and 20 are provided above and below the filter net 16, and non-volatile cooling oil such as engine oil and hydraulic oil is sucked from the inside of the container 15 by a pump 21 to the nozzles 19 and 20, respectively. The cooling oil is circulated so that the cooling oil can be sprayed from the nozzles 19 and 20 toward the filtration net 16. Reference numeral 22 is a strainer provided on the bottom of the body 15.
【０００９】処理室１内は還元剤貯留タンク５より送給
された還元剤により還元性雰囲気に保たれ、その雰囲気
中でヒータ４によりダスト３を９００℃程度に加熱する
ことにより酸化亜鉛（ＺｎＯ），酸化鉛（ＰｂＯ），或
いは酸化鉄（Ｆe2Ｏ3，Ｆe3，Ｏ4 ）等の金属酸化物を
還元させ、夫々金属微粒子として蒸発させると共に、真
空吸引ポンプ１２の作動により回収系路８を通して該処
理室からそのガスを吸引し、冷却・濾過器７にて冷却油
を噴霧することでそのガスを２５０℃以下に一気に冷却
させる。この冷却により亜鉛，鉛等の金属微粒子が固化
しその固形物が濾過網１６により濾過されて油滴と伴に
ストレーナ２２上に沈下する。このためこれらの金属を
ストレーナ２２上に回収できる。またこの過程でガスが
２５０℃以下に急冷されることにより有害な芳香族塩素
系化合物の再生成を抑えることができる。The inside of the processing chamber 1 is maintained in a reducing atmosphere by the reducing agent fed from the reducing agent storage tank 5, and the dust 3 is heated to about 900 ° C. by the heater 4 in the atmosphere, and zinc oxide (ZnO ), Lead oxide (PbO), or iron oxide (F e2 O 3 , F e3 , O 4 ) or the like is reduced and vaporized as metal fine particles, respectively, and the vacuum suction pump 12 operates to recover the recovery system. The gas is sucked from the processing chamber through 8 and the cooling / filter 7 sprays cooling oil to cool the gas to 250 ° C. or less at a stretch. By this cooling, fine metal particles such as zinc and lead are solidified, and the solid matter is filtered by the filter net 16 and settles on the strainer 22 together with the oil droplets. Therefore, these metals can be collected on the strainer 22. Further, in this process, the gas is rapidly cooled to 250 ° C. or lower, so that the regeneration of harmful aromatic chlorine compounds can be suppressed.
【００１０】また、冷却・濾過器７を通過した後のガス
に対してホッパ１０より粉末状炭素を添加することによ
り有害物質の基となるガス状のジフェニル系塩素オキシ
ンが該炭素に吸着されるので、これをその直後のバグフ
ィルター９にて効率よく除去することができる。さら
に、バグフィルター９から排出されたガスを触媒１１に
通して反応を促進させることにより有害物質が大気中に
排出されるのを一層確実に防止することができる。Further, by adding powdered carbon from the hopper 10 to the gas that has passed through the cooling / filtering device, gaseous diphenyl chlorine oxine, which is a base of harmful substances, is adsorbed on the carbon. Therefore, this can be efficiently removed by the bag filter 9 immediately after that. Further, by passing the gas discharged from the bag filter 9 through the catalyst 11 to promote the reaction, it is possible to more reliably prevent the harmful substances from being discharged into the atmosphere.
【００１１】一方、図３に示した冷却・濾過器７は横長
状の器体１５内に傾斜状に濾過網１６を張設し、該濾過
網１６の下方に回収金属の貯留室２３を形成すると共
に、該濾過網１６の両側にノズル１９，２０を設け、該
貯留室２３中の冷却油をポンプ２１により循環させるよ
うにしたものであるが、その作用は図２のものと同等で
ある。なお、このように非揮発性の冷却油を使用するこ
とでガス中にその油が揮散することがないので、真空吸
引ポンプ１２の吸引により常に回収系路８中の気圧を低
く維持することが可能となる。On the other hand, in the cooling / filtering device 7 shown in FIG. 3, a slanting filter mesh 16 is stretched in a horizontally elongated container 15 and a recovery metal storage chamber 23 is formed below the filter mesh 16. In addition, the nozzles 19 and 20 are provided on both sides of the filter net 16 so that the cooling oil in the storage chamber 23 is circulated by the pump 21. The operation is the same as that of FIG. . By using the non-volatile cooling oil in this manner, the oil does not volatilize into the gas, so the suction in the vacuum suction pump 12 can always keep the atmospheric pressure in the recovery system passage 8 low. It will be possible.
【００１２】[0012]
【発明の効果】このように本発明によれば、ダスト中の
金属を効率よく回収することができるので、その有効的
再利用が可能になると共に、有害物質の再生成，排出が
抑制され公害防止に寄与できるなどの有益な効果があ
る。As described above, according to the present invention, the metal in the dust can be efficiently recovered, so that the metal can be effectively reused, and the regeneration and discharge of harmful substances are suppressed and pollution is reduced. It has beneficial effects such as being able to contribute to prevention.
【図１】本発明のダスト処理装置を示した配管系統図。FIG. 1 is a piping system diagram showing a dust processing apparatus of the present invention.
【図２】図１の冷却・濾過器の拡大縦断面図。FIG. 2 is an enlarged vertical sectional view of the cooling / filtering device of FIG.
【図３】冷却・濾過器の他の実施の形態を示した縦断面
図。FIG. 3 is a vertical cross-sectional view showing another embodiment of the cooling / filtering device.
１ 処理室 ３ ダスト ４ ヒータ ７ 冷却・濾過器 ８ 回収系路 ９ バグフィルター １０ ホッパ １１ 触媒 １２ 真空吸引ポンプ １６ 濾過網 １９，２０ ノズル ２１ ポンプ ２２ ストレーナ 1 Processing chamber 3 Dust 4 Heater 7 Cooling / filtering device 8 Recovery system path 9 Bag filter 10 Hopper 11 Catalyst 12 Vacuum suction pump 16 Filtering net 19,20 Nozzle 21 Pump 22 Strainer
Claims (4)
元雰囲気中で加熱し該ダスト中に含まれる酸化亜鉛，酸
化鉛等の金属酸化物を還元し金属微粒子として蒸発させ
ると共に、該処理室から吸引したガスをその回収系路に
設けられた冷却・濾過器に通すことにより該金属微粒子
を分離回収することを特徴としたダスト処理装置。1. Dust contained in a processing chamber is heated in a vacuum or a reducing atmosphere to reduce metal oxides such as zinc oxide and lead oxide contained in the dust to evaporate as metal fine particles, and from the processing chamber. A dust processing apparatus characterized in that the sucked gas is passed through a cooling / filtering device provided in the recovery system path to separate and recover the fine metal particles.
一次側に粉末状炭素等の吸着材を投入する手段を設けた
請求項１に記載のダスト処理装置。2. The dust processing apparatus according to claim 1, wherein a means for charging an adsorbent such as powdery carbon is provided on the primary side of the bag filter provided in the recovery system passage.
二次側に白金系，チタン・バナジウム系等の貴金属から
なる触媒を設けて芳香族塩素化合物を除去するようにし
た請求項１または２に記載のダスト処理装置。3. The aromatic chlorine compound is removed by providing a catalyst composed of a noble metal such as platinum or titanium / vanadium on the secondary side of a bag filter provided in the recovery system passage. The dust processing device according to.
濾過器は、濾過網にガスを透過させるものであると共
に、非揮発性の冷却油を該瀘過網に向けて噴霧するもの
であるダスト処理装置。4. The cooling / cooling according to claim 1.
The filter is a dust processing device that allows gas to pass through the filter screen and sprays non-volatile cooling oil toward the filter screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5697096A JPH09227963A (en) | 1996-02-19 | 1996-02-19 | Dust treating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5697096A JPH09227963A (en) | 1996-02-19 | 1996-02-19 | Dust treating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09227963A true JPH09227963A (en) | 1997-09-02 |
Family
ID=13042392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5697096A Pending JPH09227963A (en) | 1996-02-19 | 1996-02-19 | Dust treating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09227963A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013545060A (en) * | 2010-09-23 | 2013-12-19 | テノヴァ ソシエタ ペル アチオニ | Heat exchanger for rapid cooling of combustion gas in a steel plant, apparatus for treatment of combustion gas in a steel plant including such a heat exchanger and related processing method |
| KR101353859B1 (en) * | 2011-12-28 | 2014-01-21 | 주식회사 포스코 | Apparatus for recoverring power type zinc |
| CN103643042A (en) * | 2013-11-27 | 2014-03-19 | 山东理工大学 | Comprehensive utilization method of lead slag |
| KR101507792B1 (en) * | 2013-08-29 | 2015-04-07 | 서울시립대학교 산학협력단 | Method of recovering precious metal |
-
1996
- 1996-02-19 JP JP5697096A patent/JPH09227963A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013545060A (en) * | 2010-09-23 | 2013-12-19 | テノヴァ ソシエタ ペル アチオニ | Heat exchanger for rapid cooling of combustion gas in a steel plant, apparatus for treatment of combustion gas in a steel plant including such a heat exchanger and related processing method |
| KR101353859B1 (en) * | 2011-12-28 | 2014-01-21 | 주식회사 포스코 | Apparatus for recoverring power type zinc |
| KR101507792B1 (en) * | 2013-08-29 | 2015-04-07 | 서울시립대학교 산학협력단 | Method of recovering precious metal |
| CN103643042A (en) * | 2013-11-27 | 2014-03-19 | 山东理工大学 | Comprehensive utilization method of lead slag |
| CN103643042B (en) * | 2013-11-27 | 2015-10-07 | 山东理工大学 | Comprehensive utilization method of lead slag |
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