EP0071363B1 - Syphonpfanne - Google Patents

Syphonpfanne Download PDF

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Publication number
EP0071363B1
EP0071363B1 EP19820303682 EP82303682A EP0071363B1 EP 0071363 B1 EP0071363 B1 EP 0071363B1 EP 19820303682 EP19820303682 EP 19820303682 EP 82303682 A EP82303682 A EP 82303682A EP 0071363 B1 EP0071363 B1 EP 0071363B1
Authority
EP
European Patent Office
Prior art keywords
tube
ladle
lining
teapot
sidewall
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
EP19820303682
Other languages
English (en)
French (fr)
Other versions
EP0071363A1 (de
Inventor
Gary Frank English
Donald Edward Wiley
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.)
Foseco Trading AG
Original Assignee
Foseco Trading 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 Foseco Trading AG filed Critical Foseco Trading AG
Publication of EP0071363A1 publication Critical patent/EP0071363A1/de
Application granted granted Critical
Publication of EP0071363B1 publication Critical patent/EP0071363B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • B22D41/04—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like tiltable
    • B22D41/05—Tea-pot spout ladles

Definitions

  • This invention relates to teapot ladles for molten metal and to refractory tubes for use therein.
  • Teapot ladles are usually fairly small in size, made of steel, are circular in cross-section and slightly tapered outwardly from the bottom to the top. Part of the upper rim of the ladle usually bulges outwardly to form a lip.
  • the ladle is lined with refractory material and the lining has a vertical passageway or spout, which may contain a refractory tube as described in CH-A-450641, extending from the cavity of the ladle at the base of the lining to the lip.
  • This ladle corresponds to the preamble of claim 1.
  • a pair of trunnions is usually provided on the outside wall of the ladle so that the ladle can be gripped and tilted. When the ladle is tilted molten metal passes through the vertical passageway and is poured out over the lip.
  • Teapot ladles of this type suffer from a number of disadvantages. To avoid molten metal poured into the ladle cooling excessively, or even freezing, the interior of the ladle must be preheated, and even though teapot ladles are generally of small capacity preheating can take an hour or more and the process is not only time-consuming but also uses appreciable energy.
  • the lining must be removed and replaced or at least repaired. In either case the work can be time-consuming, and time is also wasted because of the long period taken for the ladle to cool sufficiently for the relining or repair to be done.
  • European patent application publication No. 0043670 describes improved ladles, including teapot ladles, which do not suffer from the above disadvantages by having an interior lining formed of one or more floorboards and one or more side boards, the boards being formed of a composition which is refractory, has relatively high heat insulation and a relatively low thermal conductivity.
  • the spout of a teapot ladle for transporting molten metal from the bottom of the ladle to the lip may be provided by inserting a barrier of refractory material extending across the lip portion of the ladle and downwardly towards the floor of the ladle so as to produce a gap between the bottom of the barrier and the floor.
  • a spout produced in this way has an excessively large cross-sectional area and it is difficult to hold back slag on the surface of the molten metal and prevent the slag from being poured from the ladle with the molten metal.
  • the spout may be formed by incorporating a preformed refractory tube within the intermediate lining.
  • forming the spout in this way increases ladle preparation time and it is not possible to replace the tube without replacing at least part of the intermediate lining.
  • the invention provides a teapot ladle according to claim 1.
  • the refractory tube may be made from any suitable refractory material which will withstand the temperature and the erosive action of the molten metal passing through the tube.
  • suitable materials are castable, vibratable or extrudable refractory compositions based on particulate materials, such as alumina, silica, magnesite or aluminosilicates, and a binder.
  • the preferred materials of this type are compositions containing at least 55% by weight alumina and bonded with calcium aluminate or aluminium phosphate.
  • compositions which may be vacuum or injection formed to shape and which contain inorganic fibres such as alumina fibres or aluminosilicate fibres, particulate materials such as those listed above, a binder which may be inorganic or organic and optionally an organic fibre such as paper may also be used.
  • inorganic binders are preferred because organic binders tend to decompose and evolve hydrogen into the molten metal contained in the ladle. Vacuum or injection formed fibre-containing materials have excellent heat-insulation properties and tubes made from them require little or no preheating before ladles are filled with molten metal.
  • the tube may be of any cross-sectional shape which is convenient for manufacture and for fitting and fixing against the interior lining of the ladle.
  • the tube is of essentially semi-circular or essentially elliptical cross-section so that the side of the tube which is in contact with the lining is flat in order to ensure a large area of contact between the two and a better fit.
  • the ends of the tube may be open or closed.
  • the tube has one or more small cavities in the exterior of the outlet sidewall from each of which extends at least one groove to the edge of that sidewall. A similar number of small cavities are provided at corresponding locations in the lining.
  • molten metal fills the ladle, a small amount penetrates behind the tube into the grooves and into the cavities in the tube and the lining. This metal then solidifies forming solid metal pins which lock the tube in engagement with the lining.
  • the tube may have one or more apertures which align with corresponding small cavities in the lining.
  • molten metal fills the ladle and passes upwards through the tube a small amount passes through the apertures in the tube into the cavities in the lining, and on solidification forms solid metal pins which hold the tube in position.
  • the inlet end of the tube slopes slightly upwardly from the edge on the inlet side of the tube to the edge on the outlet side so that the side of the tube which is to be in contact with the lining will do so along the whole length of the tube.
  • the refractory tube In order to hold the refractory tube in position it may also be desirable to engage the lower end of the tube with a floorboard, and this is preferably done by providing a recess in the floorboard and inserting the lower end of the tube in the recess.
  • the floorboard may have an upstanding boss and the end of the tube may be fitted over the boss.
  • a refractory board for example a silicate-bonded sand board, shaped to fit around the tube and on the top of the lining in the lip portion of the ladle.
  • the lining material and the construction of the lining system may be as described in European patent application publication No. 0043670.
  • the interior lining may be formed for example as one piece or the sidewalls of the ladle, apart from the lip portion, may be lined with a board which is made up of interconnected segmental portions and which can be wrapped around to fit the contour of the ladle. A wedge shaped board is then pushed between the ends of the segmented board to line the lip portion, and hold the whole lining in place.
  • a teapot ladle consists of a metal shell 1 of essentially circular cross-section tapering slightly outwardly from bottom to top and having a lip 2 for pouring molten metal.
  • the floor 3 ( Figure 2) and the wall 4 of the ladle are lined with an intermediate lining 5 of cast, rammed or vibrated refractory material.
  • a floorboard 6 of low thermal capacity, low thermal conductivity refractory material and having a recess 7 is placed on the intermediate lining 5 on the floor 3 of the ladle so that the recess 7 is in the region of the floor 3 below the lip 2.
  • a wall board 8 made up of interconnected segmental portions and of similar material to that of floorboard 6 is wrapped within the intermediate lining 5.
  • a wedge-shaped board 9 of similar material to that of board 6 is wedged between the ends of the segmented board 8 until the wedge-shaped board 9 is below the lip 2. As shown in Figure 2 the ends of the board 6 and the sides of the board 9 are inclined in complementary fashion for a wedging fit.
  • the wedge-shaped board 9 has two vertically spaced apart cavities 10, each 1.25 cm in diameter and 1.25 cm deep in its major face which is not in contact with the intermediate lining 5.
  • a tube 11 of cast alumina or other suitable refractory material is positioned in the ladle against the wedge-shaped board 9.
  • the tube 11 has a passageway 12 which communicates with an inlet 13 in the sidewall of the tube near the lower end, and with an outlet 14 which in use is open to the lip 2 of the ladle.
  • the sidewall of the tube 11 adjacent to the sidewall of the interior lining has two 1.25 cm diameter vertically spaced cavities 15, connected by grooves 16, 5 mm wide, to the edge of the wall, and these are aligned with the 1.25 cm diameter cavities 10 in the wedge-shaped board 9.
  • the closed lower end of the tube 11 is inserted in the recess 7 in the board 6 and the upper end may be supported by means of a top board (not shown) which fits over the tube and between the wedge-shaped board 9 and the wall board 8.
  • the ladle was used to hold and cast molten steel.
  • steel entered the passageway 12 of the tube 11 and a small quantity flowed along the grooves 16 into the cavities 10 in the wedge-shaped board 9 and into the cavities 15 in the tube 11 where it solidified thus locking the tube in position and holding it firm while the ladle was emptied.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Claims (7)

1. Siphonpfanne, bestehend aus einem Metallaussenmantel (1) mit einem Ausguss (2), über den schmelzflüssiges Metall beim Kippen der Pfanne gegossen wird, und einer Ausgussrinne, die fast vom Boden der Pfanne bis zum Ausguss verläuft und von einem feuerfesten Rohr (11) gebildet wird, das an einem Innenfutter (9) aus einem Material mit geringer Wärmekapazität und niedriger Wärmeleitfähigkeit befestigt ist, welches Material bei Berührung mit in der Pfanne enthaltenem schmelzflüssigem Metall eine erosionsbeständige Oberfläche bildet, wobei das feuerfeste Rohr (11) in seiner Seitenwand an oder nahe bei seinem unteren Ende einen zur Mitte der Pfanne hin offenen Einlass (13) und an oder nahe bei seinem oberen Ende einen zum Ausguss hin offenen Auslass (14) aufweist, dadurch gekennzeichnet, dass sich der Auslass (14) in der Seitenwand des feuerfesten Rohrs (11) befindet und dass das Rohr (11) am Futter (9) mittels durch Verfestigung schmelzflüssigen Metalls in der Ausslasseitenwand des Rohrs und in einer oder mehreren Ausnehmungen an entsprechenden Stellen im Futter (9) gebildeten Metallstiften befestigt ist.
2. Siphonpfanne nach Anspruch 1, dadurch gekennzeichnet, dass das Rohr (11) eine oder mehrere kleine Ausnehmungen (15) aussen auf der Auslasseitenwand aufweist, von welchen sich jeweils mindestens eine Rille (16) zum Rand jener Seitenwand hin erstreckt.
3. Siphonpfanne nach Anspruch 1, dadurch gekennzeichnet, dass das Rohr (11) eine oder mehrere kleine Oeffnungen in der Auslasseitenwand aufweist.
4. Siphonpfanne nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass das Unterende des Rohrs (11) in eine Vertiefung (7) im Futter am Boden (3) der Pfanne eingesteckt ist.
5. Siphonpfanne nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das Oberende des Rohrs auf einer feuerfesten Platte solcher Gestalt abgestützt ist, dass diese um das Rohr herum und auf die Oberseite des Futters im Ausgussteil der Pfanne passt.
6. Siphonpfanne nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Rohr einen im wesentlichen halbkreisförmigen oder im wesentlichen halbelliptischen Querschnitt aufweist.
7. Siphonpfanne nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass das Einlassende des Rohrs vom Rand auf der Einlasseite zum Rand auf der Auslasseite hin leicht nach oben geneigt ist.
EP19820303682 1981-07-24 1982-07-13 Syphonpfanne Expired EP0071363B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8122883 1981-07-24
GB8122883 1981-07-24

Publications (2)

Publication Number Publication Date
EP0071363A1 EP0071363A1 (de) 1983-02-09
EP0071363B1 true EP0071363B1 (de) 1985-04-10

Family

ID=10523475

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19820303682 Expired EP0071363B1 (de) 1981-07-24 1982-07-13 Syphonpfanne

Country Status (4)

Country Link
EP (1) EP0071363B1 (de)
JP (1) JPS5825864A (de)
CA (1) CA1186125A (de)
DE (1) DE3262987D1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010051341A1 (de) * 2010-11-13 2012-05-16 Volkswagen Ag Gießschmelzbehälter zur Aufnahme einer Metallschmelze und Verfahren zur Behandlung von Metallschmelzen

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59552A (ja) * 1982-06-23 1984-01-05 Nissan Motor Co Ltd 自動車用エンジン
JPH03101354U (de) * 1990-01-24 1991-10-22
US7074361B2 (en) * 2004-03-19 2006-07-11 Foseco International Limited Ladle

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2447747A (en) * 1945-02-19 1948-08-24 Modern Equipment Co Teapot spout ladle
CH450641A (de) * 1965-07-19 1968-01-31 Ver Baeckereimaschinenwerke Veb Schmelztiegel oder Giesspfanne mit einer Einrichtung zum schlackenfreien Giessen, insbesondere von Grauguss

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010051341A1 (de) * 2010-11-13 2012-05-16 Volkswagen Ag Gießschmelzbehälter zur Aufnahme einer Metallschmelze und Verfahren zur Behandlung von Metallschmelzen
DE102010051341B4 (de) 2010-11-13 2022-09-08 Volkswagen Ag Gießschmelzebehälter zur Aufnahme einer Metallschmelze und Verfahren zur Behandlung von Metallschmelzen

Also Published As

Publication number Publication date
JPS5825864A (ja) 1983-02-16
DE3262987D1 (en) 1985-05-15
CA1186125A (en) 1985-04-30
EP0071363A1 (de) 1983-02-09

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