EP0182974A1 - Procédé et dispositif pour ouvrir et obturer un trou de coulée dans des fours - Google Patents

Procédé et dispositif pour ouvrir et obturer un trou de coulée dans des fours Download PDF

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Publication number
EP0182974A1
EP0182974A1 EP85110249A EP85110249A EP0182974A1 EP 0182974 A1 EP0182974 A1 EP 0182974A1 EP 85110249 A EP85110249 A EP 85110249A EP 85110249 A EP85110249 A EP 85110249A EP 0182974 A1 EP0182974 A1 EP 0182974A1
Authority
EP
European Patent Office
Prior art keywords
tap hole
shut
tapping
stuffing
opening
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.)
Granted
Application number
EP85110249A
Other languages
German (de)
English (en)
Other versions
EP0182974B1 (fr
Inventor
Werner Dipl.-Ing. Schneider
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.)
Dango and Dienenthal Maschinenbau GmbH
Original Assignee
Dango and Dienenthal Maschinenbau 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 Dango and Dienenthal Maschinenbau GmbH filed Critical Dango and Dienenthal Maschinenbau GmbH
Priority to AT85110249T priority Critical patent/ATE35001T1/de
Publication of EP0182974A1 publication Critical patent/EP0182974A1/fr
Application granted granted Critical
Publication of EP0182974B1 publication Critical patent/EP0182974B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/12—Opening or sealing the tap holes

Definitions

  • the invention relates to a method and an apparatus for alternately opening and closing a tap hole in furnaces, in particular those with high internal pressure.
  • furnaces include blast furnaces for pig iron production, shaft furnaces for direct reduction, boilers for e.g. Coal gasification or downhole furnaces for melting ferro-alloys, non-ferrous or non-metals and ladle furnaces.
  • tap holes When operating such furnaces, tap holes must be opened so that the melting material or the by-products, e.g. Slag, can drain. Then the stitch holes are closed.
  • the tapping sequence can range from half an hour to several days depending on the different melting times.
  • drilling machines are used which drill out the tap holes at a predetermined time and, after opening the tap hole, evade the molten material that emerges. This is done, for example, by swiveling it sideways or lifting the drill carriage.
  • the machines are also provided with heat protection, which protects them from damage caused by the melting material escaping.
  • the tap holes must be closed again.
  • tamping machines are used which are moved from a rest position into the tamping position and pressed against the tap hole. The tip of the stuffing gun runs through the flowing melt material. If the tip of the mouthpiece is damaged by the melting material, the puncture holes cannot be plugged and the tip of the mouthpiece must be replaced. There are delays.
  • the tap holes are usually opened with drilling rigs, which are also known from rock drilling units.
  • drilling rigs which are also known from rock drilling units.
  • the drilling rigs are modified accordingly.
  • Drill bits with 50 - 100 mm 0 are common. The diameter depends on the type of melt and the pressure in the furnace. Large holes are drilled when the furnace pressure is low and smaller holes at higher pressures.
  • Both methods have the disadvantage that the drilling process takes more or less time. It happens that the drill bit has to be annealed and replaced. It is also possible that the boring bar remains stuck in the tap hole, can no longer be withdrawn and must be burned out with an oxygen lance.
  • the so-called counter-impact drilling method in which a rod is driven into the not yet fully hardened stuffing mass a few minutes after the tap hole has been plugged.
  • the front end of the rod melts away in the furnace, the rod itself remains in the tap hole and is only knocked out again at the time of the desired tapping.
  • the tap holes are also drilled and plugged.
  • the tap hole is burned with oxygen lances or electrodes. This is necessary if the melting material "freezes" in the tap hole and then cannot be drilled. To close these holes, in most cases it is sufficient to throw granules in front of the tap opening to stop the melt flow, so that a stuffing device is not necessary.
  • Slider closures are also known, which are installed below pouring ladles to shut off and regulate the outflow of liquid steel. Similar slides are also used on the bottom tapping of electric furnaces, as slide closures on converters and as distribution slides in continuous casting plants.
  • a disadvantage of the known tapping techniques is that all methods are not suitable for ovens or pressure vessels with a high internal pressure, for example above 5 bar, e.g. up to 20 bar.
  • the invention has for its object to develop a method and a device with which it is possible to open and close the tap holes on melting furnaces or pressure vessels which have a high internal pressure safely at a predetermined time. It should be possible to completely fill out the tap holes washed out by erosion and chemical wear and to open them again at short intervals, whereby small tap hole diameters, e.g. of only 10 mm should be possible.
  • the stuffing cannon After closing the slide, the stuffing cannon can be pressed with its mouthpiece safely against the closed opening of the shut-off device.
  • a melting furnace 1 designed as a pressure vessel with a refractory lining 2 contains a melting material 4 in an interior 3 that is under high pressure.
  • the slide plate 7 has an opening 15 (FIG. 2a); it can also have a closure plug 16 made of refractory material in a second opening (FIGS. 2b, 3b).
  • the side facing away from the melting furnace 1 is provided with an attachment surface 8 for a stuffing gun 10 (FIGS. 2a to 3b) which is filled with stuffing compound 11.
  • a stuffing gun 10 FIGGS. 2a to 3b
  • a tapping rod 12 is driven into the not yet fully hardened stuffing compound 11 with a drilling machine 13.
  • the rod 12 can be pulled out again with the drilling machine 13 or a separate pulling device 14 (FIG. 5), which can be actuated by a pressure medium cylinder 17.
  • Fig. 1 shows the tapping phase.
  • the melting material 4 flows at high pressure from the tapping channel 9 into a pouring channel 18.
  • the gate valve 6 is open.
  • the slide plate 7 is moved by a pressure medium cylinder 6a of the gate valve 6, so that the tapping channel 9 is closed, as shown in FIG. 2a.
  • the stuffing gun 10 is attached to the attachment surface 8.
  • the tapping channel 9 can be filled with the stuffing compound 11 with the stuffing gun 10 (see FIG. 3a).
  • the melting material 4 withdraws into the furnace 1.
  • the stuffing gun 10 is pivoted back into its rest position.
  • a tapping rod 12 is driven in with the drilling machine 13 (FIG. 4).
  • the tapping rod 12 is at the time of the desired tapping with the drilling machine 13, which acts in both directions Impact drill can be, or pulled out again with the separate pulling device 14 (Fig. 5).
  • the tapping takes place through the tapping hole determined by the tapping rod 12, which is gradually expanded by the melting material to the diameter of the original tapping channel 9.
  • the figures 2b and 3b show a variant.
  • the plug 16 In a further bore of the gate valve 7 is the plug 16, which is pushed back into the furnace 1 when the plug gun 10 is actuated (FIG. 3b).
  • the slide plate 7a of the gate valve 6 does not need to be moved back into the open position, as in the method step according to FIG. 3a.
  • the melt material still located in the bore 15 of the slide plate 7a can be discharged through a bore (not shown) in the housing of the gate valve 6, which can also be designed to be hinged to make the slide plate 7 or 7a accessible.
  • the structural details are not shown, since the schematic drawings are intended to illustrate the method and the device in principle.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Blast Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
EP85110249A 1984-11-27 1985-08-16 Procédé et dispositif pour ouvrir et obturer un trou de coulée dans des fours Expired EP0182974B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85110249T ATE35001T1 (de) 1984-11-27 1985-08-16 Verfahren und vorrichtung zum oeffnen und schliessen eines stichloches an oefen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843443143 DE3443143A1 (de) 1984-11-27 1984-11-27 Verfahren und vorrichtung zum oeffnen und schliessen eines stichloches an oefen
DE3443143 1984-11-27

Publications (2)

Publication Number Publication Date
EP0182974A1 true EP0182974A1 (fr) 1986-06-04
EP0182974B1 EP0182974B1 (fr) 1988-06-08

Family

ID=6251227

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85110249A Expired EP0182974B1 (fr) 1984-11-27 1985-08-16 Procédé et dispositif pour ouvrir et obturer un trou de coulée dans des fours

Country Status (5)

Country Link
US (1) US4637590A (fr)
EP (1) EP0182974B1 (fr)
JP (1) JPS61130778A (fr)
AT (1) ATE35001T1 (fr)
DE (1) DE3443143A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3803132A1 (de) * 1988-02-03 1989-08-17 Dango & Dienenthal Maschbau Verfahren und stopfkanone zum schliessen des stichlochs von oefen
LU87609A1 (fr) * 1989-10-18 1991-05-07 Wurth Paul Sa Canon a argile d'une machine a boucher les trous de coulee d'un four a cuve
US6299830B2 (en) 1998-09-22 2001-10-09 Meltran, Inc. Apparatus and method for tapping a furnace
DE102008036791A1 (de) 2008-08-07 2010-02-11 Tmt Tapping-Measuring-Technology Gmbh Verfahren und Schmelzekanäle zur Unterbrechung und Wiederherstellung des Schmelzestroms von Eisen- und Metallschmelzen, insbesondere in Stichlochkanälen von Hochöfen und Abflusskanälen von Schmelzöfen
LU92330B1 (en) * 2013-12-09 2015-06-10 Tmt Tapping Measuring Technology Sarl Tap-hole refurbishing
EP3037558A1 (fr) 2014-12-22 2016-06-29 Refractory Intellectual Property GmbH & Co. KG Dispositif pour insérer un bloc réfractaire dans une structure de trou de coulée d'un récipient métallurgique, en particulier un four à oxygène basique et procédé pour une alimentation automatique du réfractaire
CA2971980C (fr) * 2014-12-23 2021-04-06 Technological Resources Pty. Limited Procede d'obturation et de reparation d'un trou de coulee refractaire
CN107429304B (zh) * 2015-02-17 2019-09-17 塔塔钢铁公司 喷枪疏通方法和设备
CN115449581A (zh) * 2022-10-01 2022-12-09 北京首钢国际工程技术有限公司 一种用于富氧竖炉处理冶金固废的出铁装置及其方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1995941A (en) * 1933-06-14 1935-03-26 John D Pugh Metallurgical furnace
DE2918333A1 (de) * 1979-05-07 1980-11-20 Metacon Ag Metallurgischer ofen
EP0041942A1 (fr) * 1980-06-06 1981-12-16 Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) Procédé pour boucher et déboucher réciproquement le trou de coulée de fours métallurgiques, notamment de hauts fourneaux
DE3230646C1 (de) * 1982-08-13 1983-10-20 Mannesmann AG, 4000 Düsseldorf Verfahren und Vorrichtung zum Verschließen des Abstichloches eines feststehenden, nicht kippbaren Elektro-Metallschmelzofens

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3883049A (en) * 1973-09-14 1975-05-13 John Mccarthy Piston-type valve for melting furnaces
LU78209A1 (fr) * 1977-09-30 1978-01-23
DE2918344A1 (de) * 1979-05-07 1980-11-20 Metacon Ag Schieberverschluss fuer den abstichkanal eines metallurgischen ofens oder gefaesses
DE3046967C2 (de) * 1979-12-20 1984-08-02 Ozdi Kohászati Üzemek, 3602 Ozd Vorrichtung zum Öffnen bzw. Schließen des Abstichloches eines Siemens-Martin-Ofens
JPS5698410A (en) * 1980-01-11 1981-08-07 Kawasaki Steel Corp Sealing method of tap hole of blast furnace
GB2097901B (en) * 1981-05-01 1985-02-13 Uss Eng & Consult Valve suitable for controlling teeming from furnace tapholes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1995941A (en) * 1933-06-14 1935-03-26 John D Pugh Metallurgical furnace
DE2918333A1 (de) * 1979-05-07 1980-11-20 Metacon Ag Metallurgischer ofen
EP0041942A1 (fr) * 1980-06-06 1981-12-16 Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) Procédé pour boucher et déboucher réciproquement le trou de coulée de fours métallurgiques, notamment de hauts fourneaux
DE3230646C1 (de) * 1982-08-13 1983-10-20 Mannesmann AG, 4000 Düsseldorf Verfahren und Vorrichtung zum Verschließen des Abstichloches eines feststehenden, nicht kippbaren Elektro-Metallschmelzofens

Also Published As

Publication number Publication date
DE3443143A1 (de) 1986-05-28
ATE35001T1 (de) 1988-06-15
JPS61130778A (ja) 1986-06-18
EP0182974B1 (fr) 1988-06-08
US4637590A (en) 1987-01-20

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