EP0060239B1 - Rinne für eine Metallschmelze - Google Patents

Rinne für eine Metallschmelze Download PDF

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Publication number
EP0060239B1
EP0060239B1 EP82890030A EP82890030A EP0060239B1 EP 0060239 B1 EP0060239 B1 EP 0060239B1 EP 82890030 A EP82890030 A EP 82890030A EP 82890030 A EP82890030 A EP 82890030A EP 0060239 B1 EP0060239 B1 EP 0060239B1
Authority
EP
European Patent Office
Prior art keywords
spout
coolant
metal jacket
channel
pig iron
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
EP82890030A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0060239A1 (de
Inventor
Max Vorderwinkler
Gerhard Dipl.-Ing. Mitter
Paul Ing. Müllner
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.)
Primetals Technologies Austria GmbH
Original Assignee
Voestalpine 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 Voestalpine AG filed Critical Voestalpine AG
Publication of EP0060239A1 publication Critical patent/EP0060239A1/de
Application granted granted Critical
Publication of EP0060239B1 publication Critical patent/EP0060239B1/de
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
    • C21B7/14—Discharging devices, e.g. for slag

Definitions

  • the invention relates to a channel for a molten metal, in particular a tapping channel of a blast furnace for producing pig iron, with a trough-shaped metal jacket which is provided with a refractory lining which receives the molten metal and with at least one cavity through which a cooling medium flows.
  • Pig iron and slag are tapped from a blast furnace at regular intervals. Pig iron and slag must be fed separately to the transport containers provided for removal from the blast furnace area. Pig iron and slag are separated in the tapping main channel, from which they are transferred to their own iron and slag channel.
  • Tapping channels with a large cross-section have recently become established, in which the pig iron also remains between the tapping. Such channels allow longer service lives than the previously used channels that were emptied after each tapping.
  • cracks for molten metal in particular the gutters with a large cross-section, form cracks in the refractory lining.
  • These cracks often extend not only through the wear lining with which such channels are usually lined, but also through the permanent lining up to the sheet metal armor.
  • Such cracks form dangerous weak points in the gutter, since when these cracks are filled with molten pig iron (called "joint runner"), pig iron breakthroughs can occur if the sheet metal armor is melted. Pig iron breakthroughs not only cause considerable damage to the channels themselves and to the stage construction, they also reduce the availability of the furnace. The operating personnel is also endangered. The time and cost of a repair after a pig iron breakthrough caused by a joint runner is considerable.
  • a tapping channel which is made of several parts, the side walls and the bottom of the sheet metal armor are formed from individual sheets which are non-positively connected at their mutual contact points.
  • the fire-resistant lining of the channels is fixed in place on the front sides of the stage construction. Even with a gutter of this type there is a risk of hot metal breakthrough caused by a joint runner. In addition, the frictional sliding of the contacting sheets of the sheet metal armor during operation is problematic.
  • the invention aims at avoiding these disadvantages and difficulties and has as its object to create a gutter of the type described above, in which cracks and thus fungus runners and gutter breakthroughs caused by them are avoided in spite of the wall thickness of the refractory lining being as small as possible. Furthermore, the channel should allow the cooling medium to be distributed according to its heat load.
  • This object is achieved in that within the cavity of the metal shell from a distribution box arranged at one end of the channel, the cooling medium conducting, extending in the longitudinal direction of the channel ribs are provided and that air is provided as the cooling medium.
  • the cavity of the metal jacket is expediently subdivided by means of the ribs into individual segments which are supplied with cooling medium independently of one another.
  • discharge lines for the cooling medium are connected to one end of the channel, in which control valves are provided for controlling the cooling medium flow.
  • Another object of the invention is therein see that the storage of the gutter should not create any stresses in it that could also be responsible for joint runs.
  • This object is achieved in that the metal jacket is fixed on the one hand in its longitudinal direction by means of a fixed bearing on the foundation and on the other hand is displaceably mounted on the foundation by means of rollers for absorbing longitudinal expansions.
  • the metal jacket is expediently inserted into a profile frame, the profile frame advantageously having laterally projecting supports at the upper edge of the metal jacket, which are supported relative to the foundation by rollers.
  • the rollers are divided into two roller bodies by means of a peripheral groove and are guided by means of a guide bar arranged on the foundation and engaging in the groove.
  • FIGS. 1 and 2 each showing a longitudinal section through a groove, one (FIG. 1) the fixed point of the groove in the area of the pig iron tapping and one (FIG. 2) the Fixed point of the gutter is provided at the opposite end.
  • FIG. 3 illustrates, on an enlarged scale, a section which is taken along lines 111-111 of FIGS. 1 and 2.
  • Figure 4 is a view in the direction of arrow IV of the figure. 3;
  • Figure 5 shows a partially sectioned perspective view of the sheet metal armor of the channel.
  • a tap opening 2 is provided, to which a tap channel 3, u. between a so-called «pool gutter».
  • This channel has a metal jacket, which is designed as a sheet metal armor made of steel, a permanent lining 5 and a wear lining 6 thereon.
  • a damming stone 7 extending over the entire clear channel cross section is arranged. This damming stone, which serves to separate pig iron and slag, retains the slag floating on the pig iron and discharges it via the drain opening 8 arranged in a channel side wall above the damming stone 7 into the slag channel, not shown in the figures.
  • the pig iron flows through the gap 9 between the dam 7 and the channel bottom. Below the dam 7, the channel bottom is raised to level 10 in a weir-like manner. By raising the level of the floor, the pig iron is stowed in the gutter. Via the elevated level 10, the pig iron is diverted into an iron channel, not shown in the figures.
  • the sheet metal armor 4 is connected to the stage construction either via a fixed point 11 in the area of the tap hole 2 (FIG. 1) or a fixed point 12 at the opposite end in the area of the dam stone 7 (FIG. 2).
  • the channel is arranged in the channel bed 13 provided in the casting platform.
  • the sheet metal armor 4 consists of a double-wall welded sheet metal construction, u. between the inner shell 4 'and the outer shell 4 ".
  • the two shells are connected to one another by stiffening ribs 14 arranged in the longitudinal direction.
  • the sheet metal armor 4 is held together at construction-dependent intervals of approx. 700 mm by welded profile frames 15, which in the The region of the upper edge of the channel has laterally projecting parts 15 'The outer ends of the projecting parts 15' are connected to one another by supports 16 running in the longitudinal direction of the channel.
  • Rails 17 are mounted on pedestals 13 'of the channel bed 13 which rise above the stage. Between these rails and treads 18 attached to the lower edge of the carrier 16, the channel 3 is supported on both sides in the region of each profile frame 15 via rollers 19. In order to achieve parallel guidance of the rollers 19, a groove 19 'is screwed into the center of each of the rollers. This groove 19 'engages in a guide bar 20 fastened to the rails 17. At both ends, the guide strips 20 are provided with brake shoe-like elevations to limit the roller path.
  • a cooling medium is passed through the cavity 4 ′′ enclosed by the inner shell 4 ′ and the outer shell 4 ′′ of the sheet metal armor 4, which coolant absorbs and dissipates the amount of heat given off by the channel. Air is preferably used as the cooling medium.
  • a compressed air line 21 When air is used, it is fed to the sheet metal armor 4 by a plurality of fans, not shown in the figures, at least one of which serves as a reserve, via a compressed air line 21.
  • the compressed air line 21 is divided into two sub-lines 21 ', 21 "before the connection to the sheet metal armor 4, which feed a left distribution box 22 and a right distribution box 23 via elastic intermediate elements, not shown. Each of these distribution boxes supplies one channel half with cooling air.
  • stiffening ribs 14 "attached between the inner shell 4 'and the outer shell 4" serve at the same time as air baffles and for dividing the sheet metal armor into segments which are supplied with cooling medium independently of one another.
  • a bottom segment and three wall segments are provided in each runner half, the discharge lines of which are designated 24, 24 'for the bottom segments and 25, 25', 26, 26 ', 27, 27' for the wall segments .
  • the control flaps are designated 28, 29, 30, 31, 32, 33, 34, 35. By adjusting the control flaps, it is possible to distribute the amount of cooling air supplied via the lines 21, 21 ', 21 "and the distribution boxes 22 and 23 as required To achieve the need for the various cooling segments.
  • the control flaps are controlled via temperature measuring points (not shown) arranged in the individual cooling segments.
  • the area around the tap opening 2, namely the chapel 36, is also cooled with the cooling air discharged from the base segments.
  • the advantage of the invention is primarily to be seen in the fact that the sheet metal armor, due to its cooling, expands only to a lesser extent during operation than the refractory lining of the channel, so that the refractory lining of the channel is always under compressive stress. There can therefore be no joints in which pig iron could penetrate.
  • the one-piece construction of the gutter according to the invention is particularly advantageous here.
  • the lining can therefore be relatively thin-walled; Despite their thin walls, their durability is about 5 to 8 times that of a conventional gutter.
  • repair work on the gutter according to the invention is only required after tapping 250,000 to 320,000 tons of pig iron.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)
EP82890030A 1981-03-04 1982-03-01 Rinne für eine Metallschmelze Expired EP0060239B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1002/81 1981-03-04
AT0100281A AT370133B (de) 1981-03-04 1981-03-04 Rinne fuer eine metallschmelze

Publications (2)

Publication Number Publication Date
EP0060239A1 EP0060239A1 (de) 1982-09-15
EP0060239B1 true EP0060239B1 (de) 1984-07-25

Family

ID=3504681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82890030A Expired EP0060239B1 (de) 1981-03-04 1982-03-01 Rinne für eine Metallschmelze

Country Status (7)

Country Link
EP (1) EP0060239B1 (enrdf_load_stackoverflow)
JP (1) JPS57158306A (enrdf_load_stackoverflow)
AT (1) AT370133B (enrdf_load_stackoverflow)
CA (1) CA1194695A (enrdf_load_stackoverflow)
DE (1) DE3260426D1 (enrdf_load_stackoverflow)
SU (1) SU1138037A3 (enrdf_load_stackoverflow)
ZA (1) ZA82913B (enrdf_load_stackoverflow)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU84042A1 (fr) * 1982-03-26 1983-11-17 Arbed Rigole de coulee pour metaux liquides
DE3339135A1 (de) * 1983-10-28 1985-05-09 Betriebsforschungsinstitut VDEh - Institut für angewandte Forschung GmbH Abstichrinne fuer einen schachtofen
NL8803103A (nl) * 1988-12-19 1990-07-16 Hoogovens Groep Bv Ijzergoot.
NL8901556A (nl) * 1989-06-21 1991-01-16 Hoogovens Groep Bv Ijzergoot.
US5088695A (en) * 1991-03-05 1992-02-18 Hoogovens Groep Bv Iron runner
NL1003885C2 (nl) * 1996-08-27 1998-03-03 Hoogovens Tech Services Goot voor een hete smelt en gootsysteem.
NL1007881C2 (nl) * 1997-12-23 1999-06-24 Hoogovens Tech Services Goot voor het geleiden van een stroom vloeibaar metaal.
JP5705582B2 (ja) * 2011-02-23 2015-04-22 新日鉄住金エンジニアリング株式会社 樋および樋の冷却方法
EP2861340B1 (en) * 2012-06-14 2017-12-06 Pyrotek, Inc. Receptacle for handling molten metal
CN102827979B (zh) * 2012-09-25 2014-07-09 莱芜钢铁集团有限公司 一种高炉渣沟及其密封结构

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB773272A (en) * 1954-07-29 1957-04-24 Kaiser Aluminium Chem Corp Improvements in or relating to molten metal transfer troughs
DE1244213B (de) * 1964-07-11 1967-07-13 Babcock & Wilcox Dampfkessel Schlackenablaufeinrichtung fuer Schlackenveredelungsanlagen
DE2428590A1 (de) * 1974-06-10 1975-12-18 Hassanzadeh M Reza Dipl Ing Neuartige hochofenschlackenrinne, die aus metall besteht
JPS5432193A (en) * 1977-08-17 1979-03-09 Nippon Kokan Kk <Nkk> Molten slag runner for production of hard granulated slag

Also Published As

Publication number Publication date
SU1138037A3 (ru) 1985-01-30
JPS6121283B2 (enrdf_load_stackoverflow) 1986-05-26
DE3260426D1 (en) 1984-08-30
AT370133B (de) 1983-03-10
CA1194695A (en) 1985-10-08
JPS57158306A (en) 1982-09-30
EP0060239A1 (de) 1982-09-15
ZA82913B (en) 1983-01-26
ATA100281A (de) 1982-07-15

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