EP0092029B1 - Four à cuve - Google Patents

Four à cuve Download PDF

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Publication number
EP0092029B1
EP0092029B1 EP83101249A EP83101249A EP0092029B1 EP 0092029 B1 EP0092029 B1 EP 0092029B1 EP 83101249 A EP83101249 A EP 83101249A EP 83101249 A EP83101249 A EP 83101249A EP 0092029 B1 EP0092029 B1 EP 0092029B1
Authority
EP
European Patent Office
Prior art keywords
furnace
waste gas
cupola
gas line
blast
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
EP83101249A
Other languages
German (de)
English (en)
Other versions
EP0092029A2 (fr
EP0092029A3 (en
Inventor
Hans-Günther Dr. Rachner
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.)
Kuettner GmbH and Co KG
Original Assignee
Kuettner GmbH and Co KG
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 Kuettner GmbH and Co KG filed Critical Kuettner GmbH and Co KG
Priority to AT83101249T priority Critical patent/ATE21543T1/de
Publication of EP0092029A2 publication Critical patent/EP0092029A2/fr
Publication of EP0092029A3 publication Critical patent/EP0092029A3/de
Application granted granted Critical
Publication of EP0092029B1 publication Critical patent/EP0092029B1/fr
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/02—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey
    • F27B1/04—Combinations or arrangements of shafts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/12—Shells or casings; Supports therefor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/12—Shells or casings; Supports therefor
    • F27B1/14—Arrangements of linings

Definitions

  • the invention relates to a hot-wind cupola furnace with long-term feed.
  • the cupola furnace which has long been known in its basic structure, is known to be the most common melting unit for the production of cast iron, malleable iron, etc. in foundries.
  • Cupola furnace the wind of which is warmed before being introduced into the furnace.
  • the classic cold wind cupola essentially consists of a cylindrical sheet metal jacket which is lined on the inside with a refractory, acidic lining, the wind nozzles which form the wind device and which are distributed over the circumference, together with an annular wind jacket, are molded into the refractory lining. Since the feed burn-out in the melting zone is so high that a daily relining of the furnace is necessary, two furnace shafts are usually set up next to each other, one of which is in operation while the other is repairing, i. H. is delivered with new feed.
  • Cupola furnaces of this type with acidic lining, wind nozzles molded into the refractory delivery, and furnace shafts arranged in pairs due to the daily relining required are also in operation as hot-wind cupola furnaces, although hot-wind cupola furnaces were built mostly feed-free with a water-cooled furnace shaft and with water-cooled wind nozzles With such a design, repair work on the stove is only necessary at intervals of a few weeks and can then be carried out at the weekend, so that such melting plants are only operated with one furnace shaft.
  • These hot-wind cupola ovens with a feedless furnace shaft which have mainly been in use since 1960, have also found widespread use because they prevent the feed from being re-fed daily.
  • shut-off devices are therefore usually designed as gas-tight slides, which require considerable effort, because on the one hand they are constantly exposed to dust-containing gas and on the other hand they are exposed to temperatures of 1 200 ° C when the furnace burns down, but they are always safe for one should provide a gas-tight seal.
  • the blast furnace gas extraction device in such systems is arranged below the charging opening and essentially consists of an annular chamber, from which the blast furnace gas line leads to the combustion chamber.
  • the column of material standing above the blast furnace gas extraction device results in a pressure drop for the unavoidable quantity of false air, which can possibly be used for the construction of a control circuit, with the negative air quantity in a range of approximately 2 to 10 at a vacuum of 1 to 2 mm WS % of the amount of blast furnace gas can be set.
  • the present invention is based on the task of simplifying and thus improving the cupola furnace of the type described in the introduction, in particular with regard to the gas system, whereby in particular the complex shut-off devices of the blast furnace gas extraction devices previously required for operational and safety reasons should be avoidable and the cupola furnace with regard to the energy balance, in particular for hot wind operation and a design with long-term feed, it should be intended and suitable.
  • the limited lifespan of the kiln feed should be usable up to the last day and nevertheless practically continuous kiln operation should be possible.
  • the accessibility to the interior of a new furnace to be delivered is to be improved and the overall effort to be reduced.
  • the solution to this problem consists in a hot-wind cupola oven with long-term feed with an upper part which has a viewing opening and a lower part of the furnace which has a wind device for feeding the wind and which is movable on a trolley and which, in the operating state, can be uncoupled from the upper part of the furnace and sealed in a decoupled joint State can be exchanged for another furnace lower part, the furnace upper part, which is connected in a known manner to a top gas line of a top gas extraction device, being pivotable upward from its operating position coupled to a furnace bottom part about a horizontal pivot axis running at a distance from the furnace axis.
  • the cylindrical ring is lowered after loosening the holding means and comes into engagement with a ring present on the upper edge section of the lower part of the furnace to be coupled in order to seal the space between the upper part of the furnace and the lower part of the furnace.
  • This known design is not only difficult to use, but also disadvantageous especially in terms of the required sealing in the area of the inevitably gap-shaped parting line, because the weight of the upper furnace part cannot contribute to the sealing, as is the case with the cupola furnace according to the invention, the upper part of the furnace is to be pivoted down about the pivot axis on the lower part of the furnace when coupled to a lower part of the furnace and accordingly rests with its own weight on the soft seal preferably provided in the area of the parting line, so that a secure good seal is ensured in this way.
  • the pivot axis for the furnace upper part is preferably formed by a joint with regard to the top gas line connected to the furnace top and branching off laterally from the top part of the furnace, which joint is arranged between the end section of the top gas line remote from the furnace top and a stationary component in which it is located in an embodiment of the present invention can be the insert of a combustion chamber arranged downstream of the blast furnace gas line.
  • the joint part of the joint arranged on the top gas line can be adjustable in the longitudinal direction of the top gas line relative to the joint part arranged on the stationary component, whereby a message in the longitudinal direction of the top gas line is made possible while Alignment can also be done by moving the lower part of the furnace.
  • Fig. 1 shows a perspective view of a cupola furnace, generally designated 1, which is designed and operated as a hot-wind cupola furnace with long-term feed.
  • the cupola furnace 1 has an inspection opening 3 present at the upper end of an inspection shaft 2.
  • a blast furnace gas extraction device designated as a whole, which essentially consists of an annular chamber 6 and a blast furnace gas line 7 connected to it.
  • the cupola furnace 1 is provided between the blast furnace gas extraction device 4 and the wind device 9 with a separating joint 14 having a soft seal 13, the upper part of the furnace located above the separating joint 14, hereinafter also referred to as the furnace head, being designated as a whole by 16 and that below the separating joint 14 located lower furnace part 17, also referred to below as the lower furnace, can be uncoupled from the upper furnace part 16.
  • a second sub-oven 18 arranged laterally next to it, which can be exchanged for the first sub-oven 17 and coupled to the oven head 16, as will be described further below is.
  • the furnace head 16 has two wind line sections 19, each of which also has a separation line 21 in the plane of the joint 14 of the furnace shaft 8 and is connected there to lower wind line sections 19 ′ which lead to the wind jacket 11.
  • the entire furnace head 16 forming an upper furnace rests with its own weight on the soft seal 13 and in this way ensures a good seal.
  • the top of the top gas line 7 leads away from the furnace 1 to a combustion chamber 22 and is connected to this end in an articulated manner with an inlet connection 23 of the combustion chamber 22, as can be seen in particular from FIG. 3.
  • this end section of the blast furnace gas line 7 has laterally arranged pivot pins 24, which are mounted in webs 26, which extend parallel to the longitudinal axis 27 of the blast furnace gas line 7 and are fastened to a flange 28 of the inlet connector 23.
  • An annular seal 29 is arranged between the inside of the inlet connection 23 and the outside of the top gas line 7.
  • the diameter of the passage opening 31 in the wall 32 of the combustion chamber 22 is larger than the outside diameter of the blast furnace gas line 7, so that it can be pivoted in the direction of arrow 33 to a limited extent about the pivot pin 24 forming a horizontal pivot axis.
  • sheets 34 are fastened, each of which is connected at its lower edge to transverse sheets 36, which in turn are acted upon by hydraulic cylinders 37 on their underside, which are supported on their underside on a stationary frame or on a gout stage, which is not shown in the drawing, since the gout stage has been omitted for the sake of clarity.
  • the shaft located above the parting line 14 is double-walled and can be cooled with water in its cavity.
  • the cupola furnace 1 in operation which is shown in the middle part in FIG. 1, has at its lower end a chassis 38, which is not shown in detail in detail, by means of which it is mounted on rails 39 of a frame 40 in the direction of Double arrow 42 can be moved laterally.
  • the hydraulic cylinders 37 are actuated after the furnace has burned down completely, which moves the entire furnace head 16 around the Move height H upwards, namely by means of a pivoting movement about the pivot axis formed by the pivot pin 24, whereby of course the clamps or the like at the parting line 14 and / or the parting lines 21 and the screw connection 43 of the water pipe are loosened beforehand 44 is opened.
  • the first lower furnace 17 is free from the upper furnace 16 and can be moved to the right in the direction of arrow 42 by means of the drive 38 of its carriage 38, not shown, so that it assumes a position in the right part, which corresponds in mirror image to the position of the second sub-furnace 18 shown in FIG. 1.
  • the second sub-furnace 18 is simultaneously moved under the furnace head 16 which is still raised. If the undercarriages 38 and 38 'of the two sub-ovens 17 and 18 are separated, the newly sub-oven 18 can be moved in a separate work step.
  • the second sub-furnace 18 can be positioned relative to the furnace head 16 on the one hand by means of its undercarriage 38 '.
  • the combustion chamber 22 is in detail on the joint designated as 48 between the top gas line 7 and the inlet connection 23 Setting means, not shown, are available.
  • the hydraulic cylinders 37 are slowly lowered, so that the lower edge 46 of the furnace head 16 lies on the soft seal 13 and provides the necessary sealing.
  • the connections between the wind line sections 19 and 19 'and the sections of the water line 44 are established, so that the cupola furnace is then ready for operation again.
  • the sub-oven can be replaced in about half an hour.
  • the sub-furnace 17 moved from its operating position into a waiting position can then cool down overnight and be reloaded on the following working day. It can easily be seen that the accessibility to the interior of a sub-oven 17 or 18 to be relocated is extraordinarily good, since the operating personnel are not hindered by the upper oven. Furthermore, it can be seen that there is no risk of accidents for the operating personnel, since a sub-furnace put on hold is completely separated from the gas system of the cupola furnace. For this reason, there is therefore no risk that uncontrolled air is sucked in from a waiting furnace. Despite these considerable operational advantages, the overall effort to be taken is considerably less than comparable known systems, since the gas system has only a single furnace head and accordingly can also dispense with any shut-off devices such as slides, water cups or the like.
  • the cupola furnace according to the invention is suitable for all possible configurations and operating modes, including with regard to the waste heat utilization, both so-called wet scrubbers, i.e. H. So systems that are provided in front of a downstream recuperator with wet dedusting devices, as well as systems with a combustion chamber, recuperator, heat exchanger and subsequent filter can be used in an advantageous manner, in which the initially unpurified blast furnace gases are burned.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Compressor (AREA)
  • Heat Treatment Of Articles (AREA)

Claims (5)

1. Cubilot à vent chaud et garnissage de longue durée, comportant une partie supérieure de four (16) présentant une ouverture de chargement (3) et une partie inférieure de four (17) présentant un système de vent (9) destiné à amener le vent et mobile sur un mécanisme de déplacement (38), laquelle partie inférieure de four est, à l'état de fonctionnement, raccordée, sur une rainure de séparation (14) étanchéifiée, à la partie supérieure de four (16) de façon à pouvoir être désaccouplée, et qui, une fois désaccouplée, peut être remplacée par une autre partie inférieure de four (18), la partie supérieure de four (16), reliée, de façon connue, à une conduite de gaz de gueulard (7) d'un dispositif d'extraction de gaz de gueulard (4), pouvant basculer autour d'un axe de pivotement (24-24) horizontal situé à une certaine distance de l'axe de four (47-47), pour quitter sa position de fonctionnement accouplée à une partie inférieure de four (17 ou 18).
2. Cubilot selon la revendication 1, caractérisé par le fait que l'axe de pivotement (24-24) est constitué par une articulation (48) disposée entre l'extrémité de conduite de gaz de gueulard (7) opposée à la partie supérieure de four (16) et un élément stationnaire (22).
3. Cubilot selon la revendication 2, caractérisé par le fait que la partie articulée de l'articulation (48) disposée sur la conduite de gaz de gueulard (7) peut être réglée dans la direction longitudinale (27) de la conduite de gaz de gueulard (7) par rapport à la partie articulée de l'articulation (48) disposée sur l'élément stationnaire (22).
4. Cubilot selon la revendication 2 ou 3, caractérisé par le fait que l'élément stationnaire est une chambre de combustion (22) raccordée de façon connue en aval de la conduite de gaz de gueulard (7).
5. Cubilot selon la revendication 4, caractérisé par le fait que la conduite de gaz de gueulard (7) est raccordée de façon articulée à une tubulure d'admission (23) de la chambre de combustion (22).
EP83101249A 1982-04-21 1983-02-10 Four à cuve Expired EP0092029B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83101249T ATE21543T1 (de) 1982-04-21 1983-02-10 Kupolofen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19823214708 DE3214708A1 (de) 1982-04-21 1982-04-21 Kupolofen
DE3214708 1982-04-21

Publications (3)

Publication Number Publication Date
EP0092029A2 EP0092029A2 (fr) 1983-10-26
EP0092029A3 EP0092029A3 (en) 1984-04-25
EP0092029B1 true EP0092029B1 (fr) 1986-08-20

Family

ID=6161460

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83101249A Expired EP0092029B1 (fr) 1982-04-21 1983-02-10 Four à cuve

Country Status (3)

Country Link
EP (1) EP0092029B1 (fr)
AT (1) ATE21543T1 (fr)
DE (1) DE3214708A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE420094C (de) * 1924-09-23 1925-10-16 Robert Ardelt Dr Ing Kupolofen mit fahrbarem Unterherd
US1801045A (en) * 1926-07-24 1931-04-14 Centrifix Corp Cupola
US2345502A (en) * 1942-03-13 1944-03-28 Herbert A Reece Cupola apparatus and method of melting metal
DE2815274C3 (de) * 1978-04-08 1981-07-09 Deere & Co. Niederlassung Deere & Co. European Office, 6800 Mannheim, Moline, Ill. Vorrichtung zum Abdichten von Öfen

Also Published As

Publication number Publication date
EP0092029A2 (fr) 1983-10-26
ATE21543T1 (de) 1986-09-15
DE3214708A1 (de) 1983-11-03
EP0092029A3 (en) 1984-04-25
DE3214708C2 (fr) 1987-07-02

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