EP0267394B1 - Verfahren zum Absaugen der Abluft bei Metallschmelzen - Google Patents

Verfahren zum Absaugen der Abluft bei Metallschmelzen Download PDF

Info

Publication number
EP0267394B1
EP0267394B1 EP87113901A EP87113901A EP0267394B1 EP 0267394 B1 EP0267394 B1 EP 0267394B1 EP 87113901 A EP87113901 A EP 87113901A EP 87113901 A EP87113901 A EP 87113901A EP 0267394 B1 EP0267394 B1 EP 0267394B1
Authority
EP
European Patent Office
Prior art keywords
metal
door
melting
closure
space
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.)
Expired - Lifetime
Application number
EP87113901A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0267394A3 (en
EP0267394A2 (de
Inventor
Herbert Schnapp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dynamit Nobel AG
Original Assignee
Dynamit Nobel AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dynamit Nobel AG filed Critical Dynamit Nobel AG
Priority to AT87113901T priority Critical patent/ATE88263T1/de
Publication of EP0267394A2 publication Critical patent/EP0267394A2/de
Publication of EP0267394A3 publication Critical patent/EP0267394A3/de
Application granted granted Critical
Publication of EP0267394B1 publication Critical patent/EP0267394B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/30—Arrangements for extraction or collection of waste gases; Hoods therefor

Definitions

  • the present invention relates to a method for extracting the exhaust air which occurs when base metals with a low melting point are melted.
  • the base metal in particular lead, is located in melting vessels into which the metal to be melted is introduced at intervals that can be determined in time; these melting vessels correspond to a suction device for the exhaust air.
  • the suction device is arranged above the crucible at a distance of 0.5 to 1.0 m and is directly connected to it.
  • this arrangement enables effective extraction of all the exhaust air above the molten metal and easy introduction of the metal to be melted into the crucible, without lead-containing exhaust air from the melting chamber into the working space in which the melting apparatus is located.
  • It has the following disadvantages: There must be a strong airflow to the suction device above the melt. The suction device must therefore have a correspondingly high performance. Due to this strong air flow, the metal particles above the melt are sucked off together with the exhaust air from the suction device during the melting process and must then be separated so that they do not get into the open. Furthermore, when metal blocks are thrown into the melt, the oxide layer on the melt is torn open and whirled up. The material whirled up is also entrained in the suction device by the strong air flow and has to be separated there again.
  • the separation of the metal and metal oxide particles entrained by the suction device must be carried out in complex filter systems in order to keep the metal content in the exhaust air which is released to the outside as low as possible. In the known systems described above, this value cannot be kept below 100 mg lead / m3 exhaust air.
  • the procedure according to the invention makes it possible that the metal and metal oxide dusts whirled up when the metal is thrown into the melting material are not removed, but instead are deposited again on the melt after a short time.
  • the amount of metal entrained in the suction device is so small that a filter system can be dispensed with.
  • the procedure according to the invention prevents the exhaust gases from penetrating into the work rooms from the area above the melt.
  • the method of operation according to the invention also allows the metal oxide layer to be skimmed from time to time when the double doors are open, without impermissible amounts of emissions being released into the exhaust air.
  • the melting space is understood to mean the space in which the metal is melted, including the free space above the melt.
  • This The free space above the melt is completely closed except for the closures mentioned, for example in the form of a hood.
  • the exhaust air is extracted via a closure in the wall of the space above the melt.
  • This closure is preferably in the form of a door; however, it can also be designed as a double door, lock or throttle.
  • the metal to be melted is also introduced via this closure.
  • the closure through which the exhaust air is sucked off, does not close tightly, so that there is always a slight suction in the direction of the suction device.
  • the metal to be melted is preferably also introduced via this closure.
  • this closure is designed as a door, preferably within a connecting piece.
  • Such a door is preferably designed as a swing door which is suspended horizontally at its upper edge.
  • the space which remains closed in front of the door and faces away from the melting space can be designed as a lock; it is connected to the suction device via a suction line. It also has another outer door facing away from the melting chamber for the introduction of the metal. This door can be designed both tightly and non-tightly. It is preferably arranged so that a metal block inserted through this door either directly or via suitable devices, e.g. B. rolls to which the closure can reach the melting chamber.
  • the metal to be melted is introduced into the lock via the outer door, then the outer door is closed and then the inner door is opened and the metal is thrown into the melt by a suitable device.
  • the inner door closes before the material falls into the melt.
  • the closure to the melting space can also be designed as a double door, in the space between which the suction line leads to the suction direction.
  • both door leaves are not tightly closed in the closed state, so that the negative pressure generated by the suction device both the exhaust air from the melting chamber and the air from the working space in which the melting furnace is located, via cracks and leaks in the door via the Suction line sucks. This also ensures that the working area is free of emissions that emerge from the surface of the molten metal during operation of the furnace.
  • the suction power When using a double door, the suction power must be such that when the double door is open, the vapors escaping from the opening are largely removed in the area of the door opening. The same applies in the event that the closure is in the form of a throttle.
  • the metal chunks must be thrown into or dropped into the melt at a point in time at which the closure through which the metal is introduced is already closed again.
  • Corresponding devices such as the swing door mentioned above, are known to the person skilled in the art.
  • the procedure according to the invention is suitable for removing the exhaust air in all metal melting processes in which low-melting base metals are used.
  • Low-melting metals are to be understood as such metals whose melting point is between 300 and 450 ° C, such as lead.
  • the described procedure makes it possible to reduce the content of metal oxide and metal particles in the exhaust air to values below 20 mg metal / m3 exhaust air.
  • exhaust air values were obtained which were only 3 mg lead / m 3 exhaust air. These values were achieved without a filter system.
  • Figure 1 shows a section through a melting furnace 1 with cover 2 and attached locking device in the design as a double door 3.
  • the exhaust air is discharged via the exhaust line 4 and regulated with the throttle 5.
  • FIG 2 shows the detail of the closure device of Figure 1 on an enlarged scale.
  • the exhaust air duct 4 is connected to the frame 7 of the double door.
  • the double door is suspended on its upper edge and can be moved via the hinge 6.
  • Figure 3 shows an embodiment with a lock in section, which is designed as a passage lock with a motor-driven roller conveyor 8.
  • the material to be loaded 11 automatically opens the individual lock gates 9 and 10 by driving via the roller conveyor 8.
  • the suction line 4 is located on the frame 7 of the lock chamber. It is ensured that the material to be thrown 11 can only fall into the melt 12 after passage and closing of the lock gate 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Fuses (AREA)
  • Manufacture Of Iron (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Processing Of Solid Wastes (AREA)
EP87113901A 1986-10-08 1987-09-23 Verfahren zum Absaugen der Abluft bei Metallschmelzen Expired - Lifetime EP0267394B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87113901T ATE88263T1 (de) 1986-10-08 1987-09-23 Verfahren zum absaugen der abluft bei metallschmelzen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863634211 DE3634211A1 (de) 1986-10-08 1986-10-08 Verfahren zum absaugen der abluft bei metallschmelzen
DE3634211 1986-10-08

Publications (3)

Publication Number Publication Date
EP0267394A2 EP0267394A2 (de) 1988-05-18
EP0267394A3 EP0267394A3 (en) 1990-03-21
EP0267394B1 true EP0267394B1 (de) 1993-04-14

Family

ID=6311264

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87113901A Expired - Lifetime EP0267394B1 (de) 1986-10-08 1987-09-23 Verfahren zum Absaugen der Abluft bei Metallschmelzen

Country Status (4)

Country Link
EP (1) EP0267394B1 (enrdf_load_stackoverflow)
AT (1) ATE88263T1 (enrdf_load_stackoverflow)
DE (2) DE3634211A1 (enrdf_load_stackoverflow)
ES (1) ES2039391T3 (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3826340A1 (de) * 1988-08-03 1990-02-15 Enviplan Umwelt Beratungs Serv Einrichtung zur verhinderung von schadstoffemissionen aus oben offenen ruehrwerksbehaeltern

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE634450C (de) * 1933-11-08 1936-08-27 Siemens Schuckertwerke Akt Ges Schmelzwanne
DE1210132B (de) * 1962-08-24 1966-02-03 Westofen G M B H Tiegelschoepfofen zum Schmelzen von Nichteisenmetallen
IT1146773B (it) * 1981-04-23 1986-11-19 Daneco Danieli Ecologia Spa Cappe mobili di aspirazione fumi secondari per acciaierie e fonderie

Also Published As

Publication number Publication date
EP0267394A3 (en) 1990-03-21
ATE88263T1 (de) 1993-04-15
DE3634211C2 (enrdf_load_stackoverflow) 1989-09-28
DE3785417D1 (de) 1993-05-19
ES2039391T3 (es) 1993-10-01
EP0267394A2 (de) 1988-05-18
DE3634211A1 (de) 1988-04-21

Similar Documents

Publication Publication Date Title
DE69518818T2 (de) Einrichtung zum Trennen pulverförmiger Materialien aus einem Luftstrom
DE3716257A1 (de) Verfahren und vorrichtung zum auffangen verschmutzter substanzen
EP0158904A2 (de) Vorrichtung zum Reinigen von Körpern mit Luftstrahlen
WO2015036071A1 (de) Verfahren und vorrichtung zum befüllen einer koksofenkammer eines koksofens
EP0267394B1 (de) Verfahren zum Absaugen der Abluft bei Metallschmelzen
DE69725316T2 (de) Verfahren und einrichtung zur vakuum/unterdruckraffination
DE102006012933B4 (de) Gerät zum Ausfiltern von titanhaltigem Staub aus einer Inertgasathmosphäre
DE19947781C1 (de) Verfahren und Vorrichtung zur Luftführung in einem Bearbeitungsraum
DE2917853A1 (de) Gasabzugschrank mit belueftungsschleier und ablufteinrichtung
EP0989214B1 (de) Verfahren und Vorrichtung zum Ausscheiden von Fremdstoffen in Fasermaterial, insbesondere in Rohbaumwolle
DE2256034C3 (de) Einrichtung zur Wärmebehandlung von Gut auf einem Wanderrost
DE19726964C2 (de) Vorrichtung zur Verhinderung des Austretens von Füllgasen aus einer Koksofenkammer während der Beschickung mit Stampfkuchen
DE2521801A1 (de) Zweistufiger separator
DE2418003C3 (de) Verfahren zum Austausch eines kornförmigen, die Füllung eines Filters bildenden Filtermaterials einer Gasreinigungsanlage
DE19943832C2 (de) Verfahren zur Reinigung von brandgeschädigten Eisenbahnwagen sowie Anlage zur Durchführung dieses Verfahrens
DE2511387C2 (de) Anlage zum Absaugen der Abgase von metallurgischen Öfen
DE2135839B2 (de) Verfahren zur Erfassung der beim Schrottchargieren und Stahlabstechen von Elektroöfen entstehenden Rauchgase
DE3144777A1 (de) Verfahren zum absaugen und filtern von ueber einer kochstelle einer kueche entstehendem wrasen und anreicherung der kuechenluft mit frischluft und vorrichtung zur durchfuehrung des verfahrens
DE102014115854A1 (de) Verfahren zur Handhabung von Schlacke und Rostdurchfall einer Müllverbrennungsanlage sowie Müllverbrennungsanlage
DE2712899C3 (de) Vorrichtung zur Regelung der Teilverbrennung von Reaktionsgasen aus Stahlkonvertern und Verfahren unter Verwendung der Vorrichtung
DE3925941A1 (de) Luftschleuse fuer kontaminierte luft
DE19620252C2 (de) Austauschbares Filterelement für Sicherheitswerkbänke in Krankenhäusern, Apotheken, Forschungslabors o. dgl.
DE3878512T2 (de) System zum abbau von in einem raum vorhandenen anlagen und verfahren zu seiner durchfuehrung.
DE3248098C1 (de) Abzugs- und Filtereinrichtung
DE1917631A1 (de) Verfahren und Einrichtung zum Einschmelzen spaeniger und/oder feinkoerniger,gegebenenfalls mit Zuschlagstoffen versetzter Metallabfaelle

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE

17P Request for examination filed

Effective date: 19900814

17Q First examination report despatched

Effective date: 19920630

ITTA It: last paid annual fee
ITF It: translation for a ep patent filed
GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL SE

REF Corresponds to:

Ref document number: 88263

Country of ref document: AT

Date of ref document: 19930415

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3785417

Country of ref document: DE

Date of ref document: 19930519

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19930608

Year of fee payment: 7

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19930526

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19930823

Year of fee payment: 7

REG Reference to a national code

Ref country code: GR

Ref legal event code: FG4A

Free format text: 3008083

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19930910

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19930913

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19930915

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19930917

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 19930922

Year of fee payment: 7

Ref country code: BE

Payment date: 19930922

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19930930

Year of fee payment: 7

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2039391

Country of ref document: ES

Kind code of ref document: T3

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19931018

Year of fee payment: 7

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19940923

Ref country code: AT

Effective date: 19940923

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19940924

Ref country code: ES

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 19940924

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19940930

Ref country code: CH

Effective date: 19940930

Ref country code: BE

Effective date: 19940930

EAL Se: european patent in force in sweden

Ref document number: 87113901.0

BERE Be: lapsed

Owner name: DYNAMIT NOBEL A.G.

Effective date: 19940930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19950331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19950401

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19940923

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19950531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

Ref country code: GR

Ref legal event code: MM2A

Free format text: 3008083

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19950601

EUG Se: european patent has lapsed

Ref document number: 87113901.0

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 19990601

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050923