EP0024548B1 - Installation de four, en particulier four pour la fusion de concentrats de minerai - Google Patents

Installation de four, en particulier four pour la fusion de concentrats de minerai Download PDF

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Publication number
EP0024548B1
EP0024548B1 EP80104347A EP80104347A EP0024548B1 EP 0024548 B1 EP0024548 B1 EP 0024548B1 EP 80104347 A EP80104347 A EP 80104347A EP 80104347 A EP80104347 A EP 80104347A EP 0024548 B1 EP0024548 B1 EP 0024548B1
Authority
EP
European Patent Office
Prior art keywords
furnace
cooling elements
wall
furnace according
walls
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
EP80104347A
Other languages
German (de)
English (en)
Other versions
EP0024548A3 (en
EP0024548A2 (fr
Inventor
Friedrich Megerle
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.)
Kloeckner Humboldt Deutz AG
Original Assignee
Kloeckner Humboldt Deutz 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 Kloeckner Humboldt Deutz AG filed Critical Kloeckner Humboldt Deutz AG
Publication of EP0024548A2 publication Critical patent/EP0024548A2/fr
Publication of EP0024548A3 publication Critical patent/EP0024548A3/de
Application granted granted Critical
Publication of EP0024548B1 publication Critical patent/EP0024548B1/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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/12—Casings; Linings; Walls; Roofs incorporating cooling arrangements

Definitions

  • the invention relates to a furnace system, in particular for melting ore concentrate, with furnace walls, in particular furnace partitions, which are composed of individual metal cooling elements arranged one above the other in bars and through which coolant flows.
  • the furnace walls that come into contact with the hot, aggressive gases and the hot metal or slag bath must be lined fire-proof and cooled.
  • the dividing wall which is immersed in the melting bath from above and extends over the entire width of the furnace, for separating the melt collecting space from the settling stove is a hollow wall provided with cooling channels. If the known furnace partition wall, which extends over the entire width of the furnace, consists of a single piece, the partition wall would practically no longer be transportable and mountable due to its weight and size. Thermal stresses in the partition could not balance each other out.
  • the furnace wall were bricked and would function as a partition wall immersed in a molten bath, this cannot be practiced taking into account the wear caused by the aggressive slag melt. It goes without saying that such a wall should be cooled and should also be self-supporting.
  • the furnace wall is made up of cooling elements made of cast iron or copper arranged one above the other, into which cooling pipes through which cooling water flows horizontally one above the other are poured and which have U-shaped deflecting elements attached to their ends form a coiled tube coil.
  • the metallic cooling elements In order for the furnace wall to be tight and stable, the metallic cooling elements must be directly connected to each other, which is not easy with the known cooling elements due to their wide joints and, after the individual cooling elements have been connected, leads to a rigid wall construction that cannot adequately compensate for thermal stresses.
  • individual recesses for receiving refractory bricks for thermal protection of the inner wall of the furnace have to be worked into the known metallic cooling elements in an expensive manner.
  • the invention has for its object to avoid these disadvantages and to create a furnace system, the walls, in particular thermally highly stressed partition walls have high strength despite existing cooling channels and can still compensate for thermal stresses, are easy to install and have other advantages.
  • the individual metallic, bar-shaped cooling elements have a low weight compared to a one-piece cooling wall, as a result of which transport and assembly are very simplified. Due to the shape and structure of the bar-shaped cooling elements, in particular through their connecting webs, thermal stress compensation of the furnace partition wall is possible, especially with different thermal loads on both sides of the wall, while at the same time niches are formed by the connecting webs in the furnace wall, which are ideally suited for use with refractory Material to be filled out.
  • the cooling elements can each have the shape of a one-piece T-bar, the T-bars lying one above the other with their legs.
  • the formation of the metallic and provided with cooling channels cooling elements in the form of a T-beam brings with it the particular advantage that, when such cooling elements are placed one on top of the other, two furnace partitions are obtained simultaneously, namely a front beam wall and a leg beam wall, the front beam wall being the partition wall immersed in the melt Separation of the melting or flue gas duct and settling stove and the thigh beam wall running transversely to the front beam wall can form the partition between the melting shaft and flue gas duct of a pyrometallurgical furnace system.
  • the bar-shaped cooling elements according to the invention do not have to extend over the entire height of a furnace partition wall, but only need to be present in the thermally particularly stressed lower wall area, so that the cooling elements according to the invention are particularly suitable as a support or support structure that is strong enough to accommodate them Masonry with integrated cooling elements ment to be able to build a tubular membrane wall as a boiler wall or another wall.
  • Figures 3 to 5 are briefly explained. These show a pyrometallurgical furnace system, which is to serve, for example, for the melting of fine-grained sulfidic lead ore concentrate, with a common housing 10, in which a floating melting shaft 11, an exhaust gas shaft 12 and a settling point 13 for further treatment of the melt are arranged.
  • the sulfidic ore concentrate is blown into the vertical smelting shaft 11 from above with a stream of technically pure oxygen.
  • the ore concentrate is roasted and melted in the smelting shaft with instantaneous heating to high temperature in a fraction of a second, even while it is still in suspension.
  • the combustion of the sulfide sulfur and possibly other oxidizable components in the oxygen atmosphere usually already provides enough heat to allow the roasting and melting process to proceed autogenously.
  • the melt collects in the melt collecting space 14, while the exhaust gas, together with the dust formed, is drawn off upward through the exhaust duct 12.
  • a primary slag forms on the collected melt in the collecting space 14.
  • the melt flows under the lower edge of a vertical partition wall 15 which dips into the molten bath or slag bath from above into the settling stove 13. In the settling furnace 13, the melt is reduced and it is given the opportunity to separate into lead and secondary slag that forms, which are tapped separately from the settling furnace.
  • the slag bath surface 16 and the lead bath surface 17 are of the same height in the melt collecting chamber 14 and in the settling hearth 13.
  • the partition 15 prevents the mixing of gases of the oxidation zone and the reduction zone and it enables an independent atmosphere to be maintained in both zones.
  • the smelting shaft 11 and the exhaust gas shaft 12 are separated from one another by the furnace partition 18. Through the space between the slag bath level 16 and the lower edge of the furnace partition 18, the exhaust gas is drawn from the smelting shaft 11 into the exhaust shaft 12.
  • the two vertical furnace partition walls 15 and 15a and 18, which are perpendicular to one another, are subject to very high thermal loads and must be cooled.
  • these two furnace partitions consist of metallic cooling elements 19, 20, 21 etc. provided with coolant channels, each of which has the shape of a one-piece T-bar and with their legs lying one above the other.
  • the end beam wall forms the partition wall 15a immersed in the melt for separating the melting or exhaust gas shaft 11 or 12 and the settling point 13, and the leg beam wall running transversely to the end beam wall forms the partition wall 18 between the melting shaft 11 and the exhaust shaft 12.
  • the bar-shaped cooling elements each have a web 22, 23, 24, etc., projecting up and down along their central longitudinal axes, by means of which adjacent cooling elements are connected by welding, as can clearly be seen in FIG. 6.
  • the cooling elements When viewed in cross section, the cooling elements have a coolant channel on each side of the vertical central longitudinal plane. Overall, the T-bar-shaped cooling elements have three continuous coolant channels, of which one channel 25 runs along the front bar and the other two channels 26, 27 each through one half of the front bar and through the adjoining leg beam arranged transversely thereto.
  • the T-bar-shaped cooling elements are made of copper and the three water-carrying pipes 25, 26, 27, which are also made of copper, are cast into the copper elements.
  • the cooling elements can also consist of steel or another metal, depending on which ore concentrate is melted in the furnace.
  • the cooling water flow through the three coolant channels 25, 26 and 27 is clearly indicated by the arrows in FIG.
  • the wall unit constructed from the T-beams is supported in a self-supporting manner only at the three ends of the beams. Connection pipelines are connected to the coolant channels 25, 26, 27 at all three end points of the T-bar-shaped cooling elements.
  • the connecting pipelines 28 and 29 are embedded in the refractory material of the thermally less stressed furnace outer walls 30, 31, 32, so that the thermally highly stressed furnace partition walls 15a, 18 are correspondingly strongly cooled as a result of the metallic cooling beam material, while the furnace adjoining the furnace partition walls outer walls, which are less exposed to heat, are correspondingly less strongly cooled due to the absence of the metallic chilled beam material in these outer walls of the furnace.
  • the heat flow from the furnace walls can be adjusted individually depending on the heat load of the walls by more or less strong accumulation of metallic chilled beam material in the wall.
  • the spaces between adjacent cooling elements 19, 20, 21 are filled with refractory material 33.
  • the gaps can also be bricked up with refractory bricks.
  • the outer surfaces of the furnace partition walls can still be protected by a fire-resistant coating. From Fig. 7 it can still be seen that in the outer wall 30 of the furnace, the space between the cooling tubes lying one above the other is filled with refractory bricks 34, while the remaining spaces are filled with refractory material.
  • the advantages which can be achieved with the invention consist mainly in the fact that the individual metallic bar-shaped cooling elements are light in weight in comparison to a one-piece cooling wall, as a result of which transport and assembly are very simplified (type of modular principle). Due to the shape and structure of the cooling elements, in particular through their connecting webs, thermal stress compensation of the furnace partition walls is possible, especially with different thermal loads on both sides of the walls.
  • the bar-shaped cooling elements according to the invention do not need to extend over the entire height of a furnace partition, but only over the lower, particularly stressed area, so that the furnace wall construction according to the invention is ideally suited as a support structure or supporting structure that is strong enough to have masonry on it integrated cooling elements, to build a tubular membrane wall as a boiler wall or another wall.
  • the end beam wall which extends over the entire furnace width of e.g. B. extends 8 m self-supporting, kept stable in the critical central region of the thigh beam wall extending transversely to the front beam wall, whereby the overall stability of the furnace construction is improved.
  • the heat dissipation through the furnace partition can be adjusted by the height of the connecting webs and thus by the distance between the individual bar-shaped cooling elements; For example, the distance between the cooling elements from the underside of the wall to the top of the wall can become wider in accordance with the thermal and mechanical loads on the furnace wall that decrease from bottom to top.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Claims (8)

1. Installation de four, en particulier four pour la fusion de concentrats de minerai, dont les parois, en particulier les parois de séparation du four, sont composées de différents éléments réfrigérants métalliques disposés les uns sur les autres en forme de poutre et traversés par un agent réfrigérant, caractérisée en ce que, en fonction des contraintes thermiques, au moins certains des éléments réfrigérants métalliques présentent chacun le long de leur axe longitudinal médian, une nervure (22, 23, 24) dépassant vers le haut et vers le bas, au moyen de laquelle les éléments réfrigérants voisins sont reliés, notamment par soudage.
2. Installation de four selon la revendication 1, caractérisée en ce que les éléments réfrigérants (20) présentent chacun, des deux côtés de leur plan longitudinal médian vertical, vu en coupe transversale, un canal (25, 26, 27) pour un agent réfrigérant.
3. Installation de four selon la revendication 1, caractérisée en ce que les intervalles entre éléments réfrigérants voisins (19, 20, 21) sont remplis par un matériau (33) résistant au feu.
4. Installation de four selon l'une quelconque des revendications 1 à 3, caractérisée en ce que les éléments réfrigérants métalliques (19, 20, 21) ont chacun la forme d'une poutre en T monobloc, et sont superposés par leurs ailes.
5. Installation de four selon la revendication 4, caractérisée en ce que les éléments réfrigérants (19, 20, 21) en forme de poutre en T constituent au moins la structure portante de deux parois de séparation de four d'une installation de four pyrométallurgique, la paroi de poutre frontale constituant la paroi (15a) plongeant dans le bain de fusion et séparant la cuve de fusion ou la cuve de gaz résiduaire (resp. 11, 12) et le creuset de décantation (13), et la paroi de poutre de traverse qui s'étend transversalement à la paroi de poutre frontale constituant la paroi de séparation (18) entre la cuve de fusion (11) et la cuve de gaz résiduaire (12).
6. Installation de four selon la revendication 4 et 5, caractérisée en ce que le bloc de paroi constitué par les poutres en T repose en porte-à- faux seulement aux trois extrémités de poutres.
7. Installation de four selon la revendication 4, caractérisée en ce que les éléments réfrigérants en forme de poutre en T présentent trois canaux par un agent réfrigérant, dont un canal (25) s'étend le long de la poutre frontale et les deux autres canaux (26, 27) s'étendent chacun à travers une moitié de poutre frontale et à travers la poutre de traverse qui y est reliée et qui est disposée transversalement à elle.
8. Installation de four selon la revendication 7, caractérisée en ce que les conduites (28, 29) sont reliées aux canaux (25, 26, 27) pour agent réfrigérant à chacune des trois extrémités des éléments réfrigérants en forme de poutre en T, et sont enrobées au moins en partie dans le matériau résistant au feu de la paroi extérieure du four moins sollicitée thermiquement.
EP80104347A 1979-09-01 1980-07-24 Installation de four, en particulier four pour la fusion de concentrats de minerai Expired EP0024548B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792935394 DE2935394A1 (de) 1979-09-01 1979-09-01 Ofenanlage, insbesondere zum schmelzen von erzkonzentrat
DE2935394 1979-09-01

Publications (3)

Publication Number Publication Date
EP0024548A2 EP0024548A2 (fr) 1981-03-11
EP0024548A3 EP0024548A3 (en) 1981-03-18
EP0024548B1 true EP0024548B1 (fr) 1983-12-07

Family

ID=6079826

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80104347A Expired EP0024548B1 (fr) 1979-09-01 1980-07-24 Installation de four, en particulier four pour la fusion de concentrats de minerai

Country Status (8)

Country Link
US (1) US4337927A (fr)
EP (1) EP0024548B1 (fr)
AU (1) AU6145180A (fr)
CA (1) CA1150503A (fr)
DE (2) DE2935394A1 (fr)
IN (1) IN154848B (fr)
SU (1) SU1048992A3 (fr)
ZA (1) ZA805394B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2517420A1 (fr) * 1981-11-27 1983-06-03 Inst Ochistke T Plaque de refroidissement pour four metallurgique
DE3427088C2 (de) * 1984-07-18 1987-05-07 Korf Engineering GmbH, 4000 Düsseldorf Vorrichtung zum Abkühlen eines heißen Produktgases
DE8709886U1 (de) * 1987-07-18 1988-11-17 Reining-Heisskühlung, 4330 Mülheim Kühlelement für metallurgische Öfen
DE4431293A1 (de) * 1994-09-02 1996-03-07 Abb Management Ag Ofengefäß für einen Gleichstrom-Lichtbogenofen
EP1069389A4 (fr) * 1999-02-03 2001-04-25 Nippon Steel Corp Panneau de refroidissement par l'eau pour paroi de four et enveloppe de four a arc
DE102016107284A1 (de) * 2016-04-20 2017-10-26 Kme Germany Gmbh & Co. Kg Kühlplatte für ein Kühlelement für metallurgische Öfen

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE193548C (fr) *
US475614A (en) * 1892-05-24 Fore-hearth
US2554836A (en) * 1948-05-14 1951-05-29 Pennsylvania Engineering Corp Skimming device for bessemer converters, large ladles, and the like
DE1027704B (de) * 1955-01-07 1958-04-10 Mont Kessel Herpen & Co Komman Kuehlbalken fuer Feuerungs- und Ofenanlagen
US2914398A (en) * 1957-08-09 1959-11-24 Aluminum Lab Ltd Recovery of aluminum in subhalide distillation
US3555164A (en) * 1967-02-17 1971-01-12 Vladimir Nikolaevich Kostin Method of processing ores and concentrates containing rare metals and a unit for effecting said method
US3632235A (en) * 1969-06-09 1972-01-04 Carl A Grenci Cryogenic pump system
JPS49118635U (fr) * 1973-02-08 1974-10-11
CH563835A5 (fr) * 1972-06-16 1975-07-15 Charmilles Sa Ateliers
SE7703568L (sv) * 1977-03-28 1978-09-29 Asea Ab Sett och anordning vid rajernsframstellning

Also Published As

Publication number Publication date
EP0024548A3 (en) 1981-03-18
IN154848B (fr) 1984-12-15
DE3065824D1 (en) 1984-01-12
EP0024548A2 (fr) 1981-03-11
US4337927A (en) 1982-07-06
SU1048992A3 (ru) 1983-10-15
AU6145180A (en) 1981-03-05
DE2935394A1 (de) 1981-03-26
CA1150503A (fr) 1983-07-26
ZA805394B (en) 1981-08-26

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