EP0226576B1 - Ausrüstung zur wiederherstellung und zur reparatur von hochöfen - Google Patents

Ausrüstung zur wiederherstellung und zur reparatur von hochöfen Download PDF

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Publication number
EP0226576B1
EP0226576B1 EP85903194A EP85903194A EP0226576B1 EP 0226576 B1 EP0226576 B1 EP 0226576B1 EP 85903194 A EP85903194 A EP 85903194A EP 85903194 A EP85903194 A EP 85903194A EP 0226576 B1 EP0226576 B1 EP 0226576B1
Authority
EP
European Patent Office
Prior art keywords
blast pipe
shoot
lance
blast furnace
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
EP85903194A
Other languages
English (en)
French (fr)
Other versions
EP0226576A1 (de
Inventor
William Pasek
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.)
Stephan Pasek & Cie SA
STEPHAN PASEK AND CIE SA
Original Assignee
Stephan Pasek & Cie SA
STEPHAN PASEK AND CIE SA
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 Stephan Pasek & Cie SA, STEPHAN PASEK AND CIE SA filed Critical Stephan Pasek & Cie SA
Priority to AT85903194T priority Critical patent/ATE44607T1/de
Publication of EP0226576A1 publication Critical patent/EP0226576A1/de
Application granted granted Critical
Publication of EP0226576B1 publication Critical patent/EP0226576B1/de
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
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • 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
    • F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
    • F27D1/1636—Repairing linings by projecting or spraying refractory materials on the lining
    • F27D1/1642—Repairing linings by projecting or spraying refractory materials on the lining using a gunning apparatus
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/04—Blast furnaces with special refractories
    • C21B7/06—Linings for 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
    • F27B1/10—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/12—Shells or casings; Supports therefor
    • F27B1/14—Arrangements of linings
    • 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
    • F27D21/00—Arrangements of monitoring devices; Arrangements of safety devices
    • F27D21/02—Observation or illuminating devices
    • F27D2021/026—Observation or illuminating devices using a video installation

Definitions

  • the present invention relates to removable equipment intended for the repair and repair of blast furnaces, in particular by gunning, in which the load distribution is carried out by a rotating chute mounted in the louver.
  • the invention also extends to a method of repairing and repairing blast furnaces of this type.
  • blast furnaces generally include devices for charging and distributing the supplied materials (mineral, coke and fluxes) constituted by a rotating chute which makes it possible to better distribute these charges and therefore to better regulate the operation of the blast furnace.
  • Blast furnaces of this type require repairs or repairs to the lining or refractory lining of the walls of the top of the tank in particular. These operations may be particularly necessary when the blast furnace has worked "on the periphery” causing maximum production of cast iron but also wear of the refractory lining which is very significantly greater than during a central operation of the device.
  • Document US-A-4 253 646 discloses a device for repairing the refractory lining of a blast furnace, which comprises a horizontal fixing device which can be introduced into a lateral opening adjacent to the upper end of the top furnace and which carries a first rotary and pivotable arm to which is articulated a second arm provided at its free end with a projection nozzle.
  • the device described nevertheless includes complicated and expensive drive mechanisms for controlling the various movements of the arms. Furthermore, it is necessary to assemble a complicated and bulky device before each repair operation of a blast furnace. In addition, as mentioned in the document VA-A-1 169 382 commented below, the use of the device claimed in the document US-A-4 253 646 requires the disassembly of the loading chute, when it is a blast furnace with a rotary loading chute, while this type of unloading device is increasingly used.
  • the above-mentioned device is intended to be introduced laterally into the blast furnace, through an opening in the wall, and cannot be used for access from above.
  • Document CA-A-1 169 382 discloses a device for repairing the refractory lining of a blast furnace, which comprises a horizontal member introduced by a lateral opening of the blast furnace, at the upper end thereof, a telescopic central shaft rotatably mounted to said horizontal member, drive means for the extension and retraction of said central shaft, for driving said shaft in rotation on its axis and for tilting an adjustable projection nozzle fixed at the end of said shaft median which can also be moved along the diameter of the blast furnace in this section.
  • Document GB-A-2 034 605 discloses a spraying installation for the hot repair of metallurgical vessels, in particular an oven for implementing the DH or RH degassing process. It claims more particularly a particular characteristic of the projection lance.
  • the device described therein is more particularly suitable for repairing converters which are substantially different from blast furnaces.
  • the device described in the aforementioned document could not find an application in a blast furnace with a revolving chute and, therefore, it was necessary to seek another more suitable solution to support and guide the projection head of a conventional type.
  • the present invention aims to provide equipment and a method for carrying out emergency operations of extremely rapid repair and repair of a blast furnace while avoiding the need to introduce operators into the blast furnace.
  • the object of the invention is also to allow, in particular, to carry out the necessary repairs and repairs without having to wait for the complete cooling of the blast furnace, which, of course, saves considerable time.
  • Another object of the present invention is to provide a new device or equipment of the aforementioned type which is suitable for a blast furnace equipped with a rotating chute, but which does not have the drawbacks of the known devices introduced laterally into the blast furnace.
  • a device comprising a telescopic projection lance which is fixed to the rotating chute (namely in the latter or outside thereof).
  • the projection lance can be deployed in order to reach, under the combined effect of the rotation and the inclination of the chute and its deployment, all the points of the blast furnace requiring treatment.
  • the principle on which the invention is based is therefore to combine two movements specific to the rotating chute, namely rotation and tilt with a specific movement of the lance, namely deployment, in order to be able without human intervention in the inside the blast furnace carry out the necessary operations. These operations can of course be observed. vées by an external operator using conventional devices, in particular at least one camera and a display screen arranged outside the blast furnace.
  • armored cameras waterproof and protected by a current of fresh air, introduced inside the blast furnace, which will be mounted for example on the chute or in any other place and which will give a front view and / or in profile of the refractory projection.
  • the deployment of the telescopic lance is ensured under its own weight, a retaining force being exerted by a cable controlled from the outside.
  • Other devices are of course conceivable.
  • the telescopic lance preferably consists of tubes with square section and comprises at one end of the lance a curved projection head.
  • tubes are housed the conduits bringing to the projection head suitable materials such as dry refractory material and water in the case where it is desired to carry out a refractory gunning.
  • suitable materials such as dry refractory material and water in the case where it is desired to carry out a refractory gunning.
  • the lance can of course also be used to spray other fluids or chemicals.
  • Said lance can also be adapted for the projection of refractory materials placed in a state of prefusion at the outlet of the projection nozzle and this by various techniques, in particular by plasma, incandescence by exothermy, or blowtorch.
  • said lance is attached to the stiffening elements of the chute which brace the upper edges of the chute. If necessary, additional spacers can be added to the chute to support said lance.
  • the present invention also relates to the use of the above device for the repair or repair of a blast furnace at all its points requiring treatment.
  • the repair or repair treatment is provided by working from top to bottom in the tank of the blast furnace.
  • This way of proceeding has the advantage that the non-adherent or superfluous materials fall freely to the bottom and on the other hand that the possibly excess water which descends under the effect of gravity is incorporated into the material brought later.
  • dripping water, during the progress of the work would destroy, by the loss of water due to gravitation, the good water-cement balance during the beginning of setting. Therefore, the last upper crowns would have a very poor quality of concrete and in particular a brittleness at the same place where very high abrasion resistance is sought.
  • repair or repair treatment must be understood in the broad sense and includes operations other than spraying by the technique known as gunning of cold or hot refractory materials.
  • the lance can in particular be used to carry out a
  • shot blasting in order to clean the brick walls or shielding or crown of dust and adherent materials of all kinds and to update the sound body of the refractory lining before carrying out gunning.
  • a chute 7 which is designed so as to be able to undergo a rotational movement substantially around the axis 5 and to be able to oscillate on the point of articulation 9.
  • the level of the upper working floor is indicated by the reference 11 and from this floor there is access to an inspection hatch 13 normally provided in the window 3 for possible repairs to the chute 7.
  • This inspection hatch will advantageously be used to mount the equipment of the invention.
  • This equipment essentially consists of a telescopic lance 21 formed of square section tubes and provided at one end with a projection head 23 of curved shape.
  • a cable 25 is wound around a winch 27, preferably a pneumatic winch, to allow the cable 25 to run smoothly.
  • the telescopic lance 21 is shown as consisting of four telescopic sections. It should be understood, however, that a different number of sections can be provided, the length of the sections and their number having to be chosen so that the lance can reach the different points subjected to the repair or repair operation.
  • Adequate elements for example restraint chains, are of course provided. so that the different sections or sections of the lance 23 cannot disengage. These elements can either be constituted by stops or by chains retaining the sections so that a sufficient length of section of the lance remains in the previous section.
  • the head 23 of the lance is designed so as to be able to direct a jet, in particular a gunning jet as shown in FIG. 2.
  • the deployment of the lance is ensured under its own weight, by unwinding the cable 25 using the winch 27.
  • the ascent of the lance is obtained by winding the cable 25 on the winch 27.
  • conduits are provided, on the one hand for the supply of dry refractory materials and on the other hand for the supply of water or other fluids.
  • Other conduits can also be provided, in particular accessory conduits for the projection of a blasting material or for the circulation of a cooling fluid.
  • the various flexible conduits identified by the reference 29 are taken up by return pulleys 31 and 33 in the upper part of the top and are brought to a conventional supply device (not shown).
  • the process of the invention takes place (possibly after a shot peening operation intended to update the sound part of the coating, by causing a projection by gunning of an adequate refractory material) from top to bottom. bottom or, depending on the quality of the materials and the spraying method adopted, preferably from bottom to top causing the telescopic rise of the lance previously deployed.
  • the variant embodiment of FIG. 3 comprises a lance 21 suspended at the end of the chute 7 and held by jacks 51 preferably arranged on either side of the chute possibly after reinforcement of the latter and allowing thus modifying the angle of inclination of the lance relative to the chute.
  • jacks 51 By acting on the inclination of the chute 7 and on the jacks 51, it becomes on the one hand possible to treat with great precision points or particular areas of the blast furnace and in particular to carry out interventions, emergency or routine, at great depths greatly exceeding, for example, the -6500 mm level below the blast furnace shock crown.
  • This embodiment illustrates the great flexibility of work possible by the installation of the invention.
  • the combined action of the inclination of the chute and the cylinders makes it possible to precisely reach the areas requiring intervention even at great depths.
  • the specific design of the telescopic lance is of course adapted to the function for which it is intended and to the constraints to which it will be subjected. Not only the length of the sections but also their section, their thickness, the quality of the steels chosen will be calculated according to the desired spans and the loads to be supported. If retaining chains are provided to prevent disengagement of the sections of the lance, they will also be calculated in an adequate manner while taking care to preserve a sufficient engagement for example of approximately 1 m of each section of lance in the upper element.
  • FIG 4 there is shown how the lance 21 is mounted in the chute 7. This assembly is advantageously done by suspending the lance 21 to the stiffening spacers 41 and 43 which are generally permanently mounted at the ends of the chute.
  • FIG. S The design of the projection head 23 is illustrated in FIG. S. Its essential characteristic is the fact that a rounded chamber 55 is arranged in its body which partially fills with the projected material, thereby protecting this body from wear under the effect of the admitted material. It is found that heads of this type where material-to-material contact is ensured can resist without significant abrasion for considerably longer periods of time.
  • This head can of course be fitted with a spout (not shown) of suitable shape and is particularly effective for working in positions similar to those illustrated in FIG. 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Blast Furnaces (AREA)

Claims (11)

1. Vorrichtung zur Ermöglichung der Wiederherstellung und Reparatur von Hochöfen (1) mit einer drehenden Rutsche (7), wobei die Vorrichtung ein teleskopisches, mit einem Spritzkopf (23) versehenes Spritzrohr (21) aufweist, dadurch gekennzeichnet, daß das teleskopische Spritzrohr auf der drehenden Rutsche (7) befestigt ist.
2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß sie mindestens eine auf der Rutsche (7) in der Spritzachse des Spritzrohrs (21) angeordnete Kamera und einen außerhalb des Hochofens angeordneten Anzeigebildschirm aufweist. ,
3. Vorrichtung nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß sie ein von Außen gesteuertes Haltekabel (25) aufweist, das an dem teleskopischen Spritzrohr befestigt ist, das unter seinem eigenen Gewicht ausfahrbar ist.
4. Vorrichtung nach einem der Ansprüche 1 - 3, dadurch gekennzeichnet, daß das teleskopische Spritzrohr (21) von Rohren mit quadratischem Querschnitt gebildet ist und daß ein gebogener Spritzkopf (23) mit gewünschtem Winkel am Ende des Spritzrohrs (21) befestigt ist.
5. Vorrichtung nach Anspruch 4, dadurch gekennzeichnet, daß in den Rohren des Spritzrohrs (21) mit quadratischem Querschnitt die Leitungen (29) angeordnet sind, die dem Spritzkopf (23) geeignete Materialien zuführen.
6. Vorrichtung nach einem der Ansprüche 1 - 5,
dadurch gekennzeichnet, daß das Spritzrohr (21) an den Versteifungselementen (41, 43) der Rutsche (7) angehängt ist, die die oberen Ränder der Rutsche (7) versteifen.
7. Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß zusätzliche Versteifungen der Rutsche (7) zur Halterung des Spritzrohrs (21) hinzugefügt sind.
8. Vorrichtung nach einem der Ansprüche 1 - 5, dadurch gekennzeichnet, daß das Spritzrohr (21) am Ende der Rutsche (7) mit Hilfe von Stellzylindern (51) aufgehängt ist, die es ermöglichen, den Neigungswinkel des Spritzrohrs (21) gegenüber der Rutsche (7) zu ändern.
9. Verwendung einer Vorrichtung nach den Ansprüchen 1 - 8 für die Wiederherstellung oder die Reparatur eines Hochofens.
10. Verwendung nach Anspruch 9, gekennzeichnet durch eine Bewegung in dem Schacht des Hochofens (1) von oben nach unten.
EP85903194A 1984-07-24 1985-07-08 Ausrüstung zur wiederherstellung und zur reparatur von hochöfen Expired EP0226576B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85903194T ATE44607T1 (de) 1984-07-24 1985-07-08 Ausruestung zur wiederherstellung und zur reparatur von hochoefen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8411716A FR2568361B1 (fr) 1984-07-24 1984-07-24 Equipement destine a permettre la refection et la reparation de hauts fourneaux comportant une goulotte tournante et procede de refection et de reparation de hauts fourneaux a l'aide d'un tel equipement
FR8411716 1984-07-24

Publications (2)

Publication Number Publication Date
EP0226576A1 EP0226576A1 (de) 1987-07-01
EP0226576B1 true EP0226576B1 (de) 1989-07-12

Family

ID=9306428

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85903194A Expired EP0226576B1 (de) 1984-07-24 1985-07-08 Ausrüstung zur wiederherstellung und zur reparatur von hochöfen

Country Status (11)

Country Link
EP (1) EP0226576B1 (de)
KR (1) KR860700288A (de)
AR (1) AR242446A1 (de)
AT (1) ATE44607T1 (de)
AU (1) AU4635685A (de)
BR (1) BR8507216A (de)
DE (1) DE3571498D1 (de)
ES (1) ES8701964A1 (de)
FR (1) FR2568361B1 (de)
NO (1) NO167479C (de)
WO (1) WO1986000978A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8718983D0 (en) * 1987-08-11 1987-09-16 Rotherham Fabrications Ltd Applying spray coating materials

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1049776A (en) * 1974-07-23 1979-03-06 Uss Engineers And Consultants Mobile refractory gunning device
US4253646A (en) * 1978-10-09 1981-03-03 Nippon Steel Corporation Hot blast-furnace-lining repairing apparatus
DE2851259C3 (de) * 1978-10-13 1981-10-01 Spribag Ag, Widen-Mutschellen Spritzanlage zur Heißreparatur von metallurgischen Gefäßen
US4301998A (en) * 1980-04-25 1981-11-24 Pfizer Inc. Vertical gunning apparatus with television monitor
DE3214990C2 (de) * 1981-04-23 1986-09-25 Nippon Steel Corp., Tokio/Tokyo Vorrichtung zum Reparieren der Auskleidung von Hochöfen

Also Published As

Publication number Publication date
NO861164L (no) 1986-03-24
ES545296A0 (es) 1986-12-16
FR2568361B1 (fr) 1989-03-03
FR2568361A1 (fr) 1986-01-31
DE3571498D1 (en) 1989-08-17
EP0226576A1 (de) 1987-07-01
WO1986000978A1 (fr) 1986-02-13
NO167479B (no) 1991-07-29
NO167479C (no) 1991-11-06
ATE44607T1 (de) 1989-07-15
BR8507216A (pt) 1987-08-04
ES8701964A1 (es) 1986-12-16
AR242446A1 (es) 1993-03-31
KR860700288A (ko) 1986-08-01
AU4635685A (en) 1986-02-25

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