EP2790855B1 - VERFAHREN ZUR WARTUNG UND/ODER REPARATUR DES AUSGUSSBEREICHS EINES METALLURGISCHEN GEFÄßES - Google Patents

VERFAHREN ZUR WARTUNG UND/ODER REPARATUR DES AUSGUSSBEREICHS EINES METALLURGISCHEN GEFÄßES Download PDF

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Publication number
EP2790855B1
EP2790855B1 EP12801536.9A EP12801536A EP2790855B1 EP 2790855 B1 EP2790855 B1 EP 2790855B1 EP 12801536 A EP12801536 A EP 12801536A EP 2790855 B1 EP2790855 B1 EP 2790855B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
radially extending
tool
extending slots
segments
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.)
Active
Application number
EP12801536.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2790855A1 (de
Inventor
Mark Moors
Jochen SCHLÜTER
Christoph Wissen
Simon ZOVKIC
Jörg GRÜNEWALD
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.)
SMS Group GmbH
Original Assignee
SMS Siemag 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 SMS Siemag AG filed Critical SMS Siemag AG
Publication of EP2790855A1 publication Critical patent/EP2790855A1/de
Application granted granted Critical
Publication of EP2790855B1 publication Critical patent/EP2790855B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/44—Refractory linings
    • C21C5/445—Lining or repairing the taphole
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/001—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like devices for cleaning ladles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D45/00—Equipment for casting, not otherwise provided for
    • 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
    • F27D1/1694—Breaking away the lining or removing parts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49718—Repairing
    • Y10T29/49721—Repairing with disassembling
    • Y10T29/4973—Replacing of defective part

Definitions

  • the invention relates to a method for the maintenance and / or repair of the spout area of a metallurgical vessel, in which a sleeve which is located in a perforated brick of the metallurgical vessel and is formed essentially as a hollow cylinder is removed.
  • metallurgical vessels which have outlet openings for molten material.
  • the outlet openings of such metallurgical vessels in particular the outlet opening of Stahlg phonepfannen - are lined with stone material (ie with refractory material).
  • stone material ie with refractory material.
  • Stahlg phonepfannen this is done by the introduction of a single casting sleeve or a combination of several sleeves in a perforated brick, which is located in the pan lining.
  • the sleeve or the combination of sleeves is walled into the hole stone by means of mortar.
  • the breaking out of the sleeve or the combination of sleeves is usually carried out by a destruction of the refractory stone, usually by the use of a pneumatic hammer.
  • the effort to remove the spent sleeve is relatively time consuming and therefore expensive.
  • the force exerted by the jackhammer on the metallurgical vessel shocks are very disadvantageous.
  • the invention is therefore the object of a method of the type mentioned in such a way that it is possible to make in a shorter time and thus more cost the maintenance or repair of the spout area of a metallurgical vessel and the sleeve described or the combination of sleeves replace. Furthermore, the process should take place with less stress on the metallurgical vessel.
  • the substantially hollow cylindrical sleeve is preferably made of stone material.
  • step a When performing step a), at least two radially extending slots are preferably inserted into the sleeve, whereby the sleeve is interrupted at at least two circumferential locations and divided into at least two sleeve segments, which are then pulled out of the perforated block in the implementation of step c) ,
  • a number of sleeve segments are created by inserting radially extending slots into the sleeve which each extend at the same circumferential angle.
  • the introduction of the radially extending slots in the sleeve can be done by a milling operation. Alternatively, this is also a sawing provided. In the latter case, a chain saw is preferably used for introducing the radially extending slots.
  • the introduction of the radially extending slots in the sleeve can be carried out by a tool, wherein the tool is cooled during the cutting of the sleeve or the stone material.
  • the tool for introducing the radially extending slots in the sleeve can be performed in accordance with a further development of the proposed method by an automatic handling machine.
  • Performing the above step c) can be done by using a hook-shaped pulling tool.
  • This hook-shaped pulling tool can be introduced with a hook-shaped handle portion through the at least one slot in the sleeve through the spout area in the interior of the molten metallurgical vessel and behind the slot in the interior of the molten metallurgical vessel so moved, in particular rotated, that the sleeve or its segments with Undercut can be grasped and pulled out.
  • the invention accordingly proposes a method for a metallurgical plant operation, with which the removal of refractory material or stone material from the sprue of a metallurgical vessel is possible, in particular a removal of spent casting sleeves from steel ladles.
  • the invention can be used particularly favorably in metallurgical vessels in the form of steel ladles, blow-steel converters, AOD converters and electric arc furnaces.
  • the proposed method advantageously serves to accelerate and improve the removal process for the sleeve or stone material to be replaced.
  • a stone chain saw is inserted into the pouring channel and sawed with the cutting edge (chain) one or more slots in the sleeve.
  • the slot is in each case up to the hole stone, so that the sleeve stone is completely interrupted at the sawing and the previously located in the stone tension - caused by the thermal expansion of the sleeve - is eliminated. If the sleeve no longer has tension as a result of the slot or slots, it can be pulled out of the perforated block relatively easily by means of a pulling tool.
  • the tool may preferably be cooled with water, either left inside the tool or running over the cutting elements into the channel of the metallurgical vessel.
  • the channel of the vessel can be cooled down before the approach of the tool with water or with another cooling medium.
  • the extract of the slotted sleeve or its segments can be done for example by means of a hook-like tool, in which on a metal rod or pipe, a further metal piece is attached, the so in the opening of the vessel is introduced, that can be pulled by a rotation of the trigger tool, the extracting stone.
  • a hook-like tool in which on a metal rod or pipe, a further metal piece is attached, the so in the opening of the vessel is introduced, that can be pulled by a rotation of the trigger tool, the extracting stone.
  • the introduced into the stone slots can be used to introduce the pulling tool or to give a wider hook space.
  • Fig. 1 is a section of a steel ladle to see.
  • the wall of the pan is denoted by 13, behind it is a lining 12, which encloses a perforated brick 2.
  • a sleeve 3 is walled into the perforated brick 2.
  • the existing stone material sleeve 3 is worn here and must be replaced.
  • a tool 7 in the form of a chain saw is lifted into the region of the sleeve 3, for which purpose an unillustrated handling device (robot) can be used.
  • the chainsaw 7 has a shearing 9 over which a chain 10 runs.
  • the chain is driven by a motor which is arranged in a housing 11.
  • Fig. 2 can be seen how with the chainsaw 7, a slot is incorporated into the sleeve 3. This takes place here at two peripheral points.
  • the thus processed sleeve 3 is in Fig. 3 in section AB according to Fig. 2 to see. It can be seen that at each of two circumferential locations 5 a slot 4 has been introduced so that the sleeve 3 has been divided into two sleeve segments 3 'and 3 ".
  • the sleeve segments 3 ', 3 "in the present case, in general more than two, can be pulled out of the perforated brick 2 with a pulling tool 6 with a hook-shaped grip section 8; Fig. 4 shown.
  • the pulling tool can be inserted by hand or by handling device (robot) in the hole stone or in the sleeve.
  • the sawn slots 4 can be used to introduce the hook-shaped handle portion 8 inside the metallurgical vessel. If this is done, the rod 14 to z. B. are rotated 90 °, so that the hook-shaped grip portions 8 take behind the sleeve segments, so that they can be removed (bayonet principle).
  • the tool 7 can be actively cooled during its use. Before or during the insertion of the slot or slots 4, the sleeve area or the area of the stone material to be removed can also be cooled.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP12801536.9A 2011-12-14 2012-12-07 VERFAHREN ZUR WARTUNG UND/ODER REPARATUR DES AUSGUSSBEREICHS EINES METALLURGISCHEN GEFÄßES Active EP2790855B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201110088619 DE102011088619A1 (de) 2011-12-14 2011-12-14 Verfahren zur Wartung und/oder Reparatur des Ausgussbereichs eines metallurgischen Gefäßes
PCT/EP2012/074841 WO2013087539A1 (de) 2011-12-14 2012-12-07 VERFAHREN ZUR WARTUNG UND/ODER REPARATUR DES AUSGUSSBEREICHS EINES METALLURGISCHEN GEFÄßES

Publications (2)

Publication Number Publication Date
EP2790855A1 EP2790855A1 (de) 2014-10-22
EP2790855B1 true EP2790855B1 (de) 2015-07-01

Family

ID=47358157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12801536.9A Active EP2790855B1 (de) 2011-12-14 2012-12-07 VERFAHREN ZUR WARTUNG UND/ODER REPARATUR DES AUSGUSSBEREICHS EINES METALLURGISCHEN GEFÄßES

Country Status (6)

Country Link
US (1) US20140352122A1 (es)
EP (1) EP2790855B1 (es)
JP (1) JP5744342B2 (es)
DE (1) DE102011088619A1 (es)
ES (1) ES2542976T3 (es)
WO (1) WO2013087539A1 (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201116287D0 (en) * 2011-09-21 2011-11-02 Airbus Operations Ltd Method and device for removing a sleeve from a bore
CH708284B1 (de) 2013-07-11 2023-11-15 Refractory Intellectual Property Gmbh & Co Kg Verfahren und Wechselvorrichtung zum automatischen Auswechseln einer Ausgusshülse eines Schiebeverschlusses an einem metallurgischen Gefäss.

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Also Published As

Publication number Publication date
DE102011088619A1 (de) 2013-06-20
ES2542976T3 (es) 2015-08-13
WO2013087539A1 (de) 2013-06-20
JP2015500146A (ja) 2015-01-05
US20140352122A1 (en) 2014-12-04
JP5744342B2 (ja) 2015-07-08
EP2790855A1 (de) 2014-10-22

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