EP0039035B1 - Dispositif pour enlever une couche fluide d'un bain - Google Patents

Dispositif pour enlever une couche fluide d'un bain Download PDF

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Publication number
EP0039035B1
EP0039035B1 EP81102994A EP81102994A EP0039035B1 EP 0039035 B1 EP0039035 B1 EP 0039035B1 EP 81102994 A EP81102994 A EP 81102994A EP 81102994 A EP81102994 A EP 81102994A EP 0039035 B1 EP0039035 B1 EP 0039035B1
Authority
EP
European Patent Office
Prior art keywords
housing
conveyor
screw
slag layer
slag
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
Application number
EP81102994A
Other languages
German (de)
English (en)
Other versions
EP0039035A1 (fr
Inventor
Peter Dipl.-Ing. Klotz
Henry Böttcher
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.)
Metaleurop Weser Blei GmbH
Original Assignee
Preussag Boliden Blei GmbH
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 Preussag Boliden Blei GmbH filed Critical Preussag Boliden Blei GmbH
Publication of EP0039035A1 publication Critical patent/EP0039035A1/fr
Application granted granted Critical
Publication of EP0039035B1 publication Critical patent/EP0039035B1/fr
Expired legal-status Critical Current

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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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1545—Equipment for removing or retaining slag
    • F27D3/1554—Equipment for removing or retaining slag for removing the slag from the surface of the melt

Definitions

  • the invention relates to a device for removing the slag layer floating on a melt, in particular a lead melt during refining, from a melting vessel with a mechanical screw conveyor which plunges horizontally into the slag layer.
  • reaction products that are specifically lighter than in the bath take place in an electrolyte.
  • reaction products collect in a fluid layer from a liquid, pasty or powdery mass on the bath surface and must be removed from time to time or continuously.
  • the pyrometallurgical refining of lead in the melting vessel produces a wide variety of reaction and intermediate products, for example solid lead copper mixed crystals for coarse decoupling through Seigers and copper removal, mainly from copper and lead sulfide, with fine decoupling using sulfur, tin tapping during decinning using selective oxidation or atmospheric oxygen chlorine-containing reaction products, arsenic smear or scabies when deharseising and antimony smear when dehumidifying using caustic soda and saltpetre.
  • reaction products are mostly more or less infused with lead droplets and must be carefully removed from the bath surface. According to previous practice, this is done with the help of rake-like drawing sticks or by means of perforated trowels which allow the lead contained in the reaction products to drip off and which should keep the lead losses low.
  • pneumatic deslagging devices in metallurgical multi-slag processes to remove a slag as far as possible before adding new slag formers.
  • These usually consist of a tube with a T-piece at one end of the tube.
  • the T-piece is provided with a row of holes on the underside, through which compressed air emerges and drives the slag towards the converter mouth.
  • Such a device is at best suitable for removing liquid and in particular non-toxic reaction products; for example, it is not suitable for removing the reaction products from the lead refining alone because of the associated high dust accumulation and the generation of toxic vapors.
  • a skimmer-like suction device known from US Pat. No. 3,923,499 is similarly polluting, its entry opening partially immersing it in the slag layer and the slag being moved mechanically or pneumatically into the entry opening and then being sucked off.
  • the invention is therefore based on the object of providing a device for removing the slag view floating on a melt, in particular a lead melt during refining, with a mechanical conveyor which not only works reliably but also is particularly environmentally friendly and is associated with low losses of valuable materials.
  • This object is achieved according to the invention in a device of the type mentioned at the outset closed conveyor housing with a two-stage, inclined transition trough bottom, the lower stage inside and the upper stage outside the refining vessel, an inlet opening in the bottom of the lower housing stage and a lateral discharge opening of the upper housing stage for the slag layer, the lower housing stage with det Inlet opening dipped into the slag layer and a conveyor screw arranged in the housing, which has a smaller diameter in the area between the discharge opening and the wall of the melting vessel than in the area between the inlet opening and the wall of the melting vessel.
  • a heated melting tank 1 there is a working lead melt 2 with a fluid layer 3 consisting of fluid reaction or intermediate products.
  • the melting tank 1 is covered with a hood 4, from which a suction nozzle 5 leads to gas cleaning (not shown).
  • the cover 4 is provided with a cross member 6, in which an agitator 8, driven by a motor 7 and changeable in its direction of rotation, is mounted with an agitator shaft 9 and agitator blades 10.
  • the agitator 8 extends through a traverse or hood opening 11 through which the boiler 1 can also be emptied by means of a metal pump.
  • a screw conveyor 12 projects through the covering hood 4 and dips slightly into the fluid layer 3 on the underside; it consists of a housing 13 and a stepped bottom or trough.
  • the bottom consists of a lower step 14 immersing in the fluid layer 3, a transition 15 and an upper step 16 lying outside the refining vessel 1.
  • the floor has an inlet opening 17 and in the area of the upper step 16 a discharge opening 18 , below which a transport container 19 for the removed reaction products is arranged.
  • the screw conveyor 12 is vertically adjustable on lifting rams 20 in order to be able to change the immersion depth of the lower housing stage 14 and to keep the lead losses low by careful adjustment.
  • a shaft 23 mounted in two roller bearings 21, 22 is driven by a motor 24 via a chain drive 25 and carries a belt-shaped screw conveyor 26 with a large diameter stage 27, a transition stage 28 and a small diameter stage 29.
  • the fluid layer 3 is driven in the direction of the inlet opening 17 of the screw conveyor 12. Since the inlet opening 17 of the screw conveyor 12 lies in the fluid layer, the windings of the large diameter stage 27 move the reaction products of the fluid layer 3 from the region of the inlet opening via the housing or trough bottom 14, 15 and 16 in the direction of the discharge opening 18 Reaction products are lifted over the edge of the vessel and reach the transport vessel 19 intermittently or continuously. In this way, the fluid reaction products can be removed from the bath surface practically automatically without any strain on the operating personnel and without the risk of increased lead oxidation due to additional false air. To the extent that toxic gases and vapors are produced, they are sucked off via the suction nozzle 5 and finally separated.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacture And Refinement Of Metals (AREA)

Claims (5)

1. Dispositif pour l'évacuation d'une couche de scorie flottant sur un bain métallique,notamment sur un bain de plomb en cours de raffinage, hors d'un récipient de fusion, comportant un transporteur à vis sans fin mécanique pénétrant horizontalement dans la couche de scorie, caractérisé en ce qu'il comprend une enveloppe de transporteur fermée (13) ayant un fond en auge à deux étages qui comporte une partie intermédiaire inclinée (15) et dont l'étage inférieur (14) et l'étage supérieur (16) se trouvent respectivement à l'intérieur et à l'extérieur du récipient de fusion (1), une ouverture d'entrée étant ménagée dans le fond de l'étage inférieur (14) de l'enveloppe et une ouverture latérale (18) pour la sortie de la couche de scorie(3) étant ménagée dans un côté de l'étage supérieur (16) de l'enveloppe, l'étage inférieur (14) de l'enveloppe étant disposé de manière que son ouverture d'entrée (17) se trouve dans la couche de scorie, de même qu'une vis sans fin de transport (26), montée dans l'enveloppe (13), qui, dans la zone comprise entre l'ouverture de sortie (18) et la paroi du récipient de fusion (2), a un diamètre plus petit que dans la zone comprise entre l'ouverture d'entrée (17) et la paroi du récipient de fusion
2. Dispositif selon la revendication 1, caractérisé en ce que le transporteur à vis sans fin (12) est monté, de manière à être réglable en hauteur, sur des vérins de soulèvement (20).
3. Dispositif selon l'une des revendications 1 ou 2, caractérisé en ce que le transporteur à vis sans fin (12) est monté de manière à pouvoir se déplacer.
4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que le récipient de fusions (1) est muni d'une hotte de couverture (4).
5.Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que la hotte (4) et/ou l'enveloppe du transporteur (13) sont reliées à un dispositif d'aspiration.
EP81102994A 1980-04-26 1981-04-18 Dispositif pour enlever une couche fluide d'un bain Expired EP0039035B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3016160A DE3016160C2 (de) 1980-04-26 1980-04-26 Vorrichtung zum Entfernen einer auf einer Schmelze befindlichen Schlackenschicht
DE3016160 1980-04-26

Publications (2)

Publication Number Publication Date
EP0039035A1 EP0039035A1 (fr) 1981-11-04
EP0039035B1 true EP0039035B1 (fr) 1986-07-02

Family

ID=6101035

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81102994A Expired EP0039035B1 (fr) 1980-04-26 1981-04-18 Dispositif pour enlever une couche fluide d'un bain

Country Status (5)

Country Link
US (1) US4415144A (fr)
EP (1) EP0039035B1 (fr)
CA (1) CA1169647A (fr)
DD (1) DD158256A5 (fr)
DE (1) DE3016160C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29914580U1 (de) * 1999-08-19 2000-01-05 Schwille Elektronik Produktion Vorrichtung zum Entfernen von Fremdstoffen aus einem flüssigen Metallbad

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3202835C2 (de) * 1982-01-29 1984-11-29 Special'noe proektno-konstruktorskoe i technologičeskoe bjuro elektrotermičeskogo oborudovanija proizvodstvennogo obiedinenija "Sibelektroterm", Novosibirsk Raffinationsapparat zum Raffinieren geschmolzener Metalle
CA1199180A (fr) * 1982-02-11 1986-01-14 Duncan Ritchie Methode d'extraction de la crasse d'un pot d'affinage du plomb
CH680468A5 (fr) * 1989-08-23 1992-08-31 Gautschi Electro Fours Sa
US5417815A (en) * 1994-02-07 1995-05-23 Martin Marietta Energy Systems, Inc. Liquid surface skimmer apparatus for molten lithium and method
DE19500266C1 (de) * 1995-01-07 1996-02-22 Metallgesellschaft Ag Verfahren und Vorrichtung zur Trennung einer spezifisch leichteren Phase von einer spezifisch schwereren flüssigen Phase
NL1001800C2 (nl) * 1995-12-01 1997-06-04 Hoogovens Aluminium Bv Werkwijze en inrichting voor het continu raffineren van een smelt.
JP6828670B2 (ja) * 2017-12-12 2021-02-10 新東工業株式会社 溶解作業装置及び溶解作業方法

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD82191A (fr) *
US1943307A (en) * 1931-08-24 1934-01-16 Du Pont Purifying light metals
US2074498A (en) * 1935-12-21 1937-03-23 Wean Engineering Co Inc Method and apparatus for coating
US3243281A (en) * 1962-04-03 1966-03-29 Reynolds Metals Co Extraction of aluminum using mercury containing mercuric halide
DE1433551A1 (de) * 1962-11-19 1968-11-28 Salzgitter Huettenwerk Ag Pneumatische Abschlackungsvorrichtung
US3180525A (en) * 1963-03-28 1965-04-27 Oliver Corp Fertilizer feeding and metering mechanism
US3338414A (en) * 1966-09-14 1967-08-29 Exxon Research Engineering Co Liquid skimming device
US3447683A (en) * 1967-05-15 1969-06-03 Laval Turbine Separation apparatus and method for mixed impurities on the exposed surface of a liquid body
AU475319B2 (en) * 1972-09-29 1976-08-19 Metallgesellschaft Aktiengesellschaft Process and apparatus for removing solids formed in the refining of molten lead
US3941360A (en) * 1974-12-16 1976-03-02 Chase Brass & Copper Co., Incorporated Mechanical skimmer
US3955805A (en) * 1975-03-28 1976-05-11 Alexandr Ivanovich Sapko Device for removal of slag from surface of molten metal
DE2520370C3 (de) * 1975-05-07 1979-12-06 Zaporoschskij Industrialnyj Institut, Saporoschje (Sowjetunion) Vorrichtung zum Entschlacken der Oberfläche von Schmelzgut
CA1079528A (fr) * 1975-09-08 1980-06-17 Broken Hill Associated Smelters Proprietary Limited (The) Methode d'ecremage continu du soufre
US4007119A (en) * 1975-09-09 1977-02-08 Blackstone Corporation Methods and apparatus for skimming liquids
JPS599170B2 (ja) * 1976-06-11 1984-02-29 株式会社クボタ スカム吸引方法とその装置
US4191559A (en) * 1977-12-01 1980-03-04 Aluminum Company Of America Skim removal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29914580U1 (de) * 1999-08-19 2000-01-05 Schwille Elektronik Produktion Vorrichtung zum Entfernen von Fremdstoffen aus einem flüssigen Metallbad

Also Published As

Publication number Publication date
CA1169647A (fr) 1984-06-26
DE3016160A1 (de) 1981-11-12
DD158256A5 (de) 1983-01-05
US4415144A (en) 1983-11-15
DE3016160C2 (de) 1982-12-23
EP0039035A1 (fr) 1981-11-04

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