US3337205A - Tiltable crucible or converter for refining pig iron - Google Patents

Tiltable crucible or converter for refining pig iron Download PDF

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Publication number
US3337205A
US3337205A US340914A US34091464A US3337205A US 3337205 A US3337205 A US 3337205A US 340914 A US340914 A US 340914A US 34091464 A US34091464 A US 34091464A US 3337205 A US3337205 A US 3337205A
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US
United States
Prior art keywords
crucible
bearing surfaces
ring
brackets
pig iron
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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 - Lifetime
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US340914A
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English (en)
Inventor
Puxkandl Peter
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.)
Voestalpine AG
Voest AG
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Voestalpine AG
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Publication date
Application filed by Voestalpine AG filed Critical Voestalpine AG
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Publication of US3337205A publication Critical patent/US3337205A/en
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    • 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
    • C21C5/46—Details or accessories
    • C21C5/4633—Supporting means
    • 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
    • C21C5/46—Details or accessories
    • C21C5/50—Tilting mechanisms for converters

Definitions

  • Tiltable crucibles or converters for refining pig iron comprise a refractory-lined cylindrical or pear-shaped vessel, the bottom part of which may be integral with or detachable from the shell part.
  • Mounted to surround such a crucible approximately in the height of the centre of gravity of the charged crucible is a closed or horseshoe-like, open carrying ring which is rigidly connected with two trunnions.
  • the crucible must be tiltable from the substantially vertical blowing position into the upsidedown discharging position and back into the upright position by means of electric or hydraulic drive means acting on the trunnions.
  • the carrying ring has to securely hold the crucible in any position and to transmit the forces exerted by the drive to the crucible.
  • the invention resides in that in a tiltable crucible or converter for refining pig iron which is supported by supporting elements taking up hearing stresses, such as pairs of brackets or claws, on a carrying body or ring surrounding the crucible, the bearing surfaces of the supporting elements define inclined planes slanting towards the centre of the ring, The inclination of the bearing surfaces advantageously corresponds to the ratio that the height of the carrying ring bears to the diameter of the vessel.
  • the bearing surfaces may be formed by two pairs of Wedges having a freedom of movement in the longitudinal direction of the crucible, and arranged centrally between the two pairs of wedges there may be a stop, which also allows a free movement in the longitudinal direction of the crucible, but has no freedom of movement in the peripheral direction.
  • the idea of the invention thus is based on the consideration that the bearing surfaces are given the same inclination as the direction of the thermal expansion of those peripheral points of the crucible shell on which the supporting elements are mounted.
  • FIG. 1 is a partial vertical sectional view of the crucible
  • FIG. 2 is a lateral view in the horizontal tilted position
  • FIG. 3 is a diagrammatic representation of the thermal expansion of the crucible shell relative to a carrying body
  • FIG. 4 shows on an enlarged scale a sectional view showing crucible shell, supporting elements and carrying body in the blowing position as viewed along the line IV-IV of FIG. 5.
  • FIG. 5 is a showing of the design of the supporting elements, again in the blowing position.
  • numeral 1 denotes the refractory-lined crucible
  • the carrying ring 2 Around the shell the carrying ring 2 is arranged, which is box-like or has a C-shaped section. It is rigidly connected with two trunnions (not shown).
  • pairs of brackets or claws 3, 3 are fixed, e.g. by welding, one pair of claws preferably being arranged in the plane of tilting of the vessel and two further pairs of claws being disposed as supporting elements in a plane perpendicular to the plane of tilting.
  • letters A and A designate points of the periphery of the crucible shell 1 which, due to thermal expansion, tend to move the distance'a, a to B and B.
  • the position of points B and B, respectively, is dependent on the ratio of h to d and corresponds to the ratio that H (height of the carrying ring) bears to D (diameter of the vessel), because the expansion is a linear function of the temperature and of the dimension of the vessel and of the carrying ring.
  • the bearing surfaces of the supporting elements on the carrying body are made with the same inclination as corresponds to the theoretical thermal expansion of the peripheral points A and A.
  • the bearing surfaces of each supporting element are formed by pairs of wedges 4, 4' and 5, 5', respectively.
  • the pairs of wedges 4, 4' and 5, 5, respectively are arranged in spaced relation, in such manner that each of them will take up half of the bearing pressure P/2. They have a freedom of motion in the peripheral direction of the crucible, as is indicated at X in FIG. 5.
  • a stop 7 Centrally arranged between the two pairs of wedges is a stop 7 which prevents a movement in the peripheral direction of the crucible, but has a freedom of motion y in the longitudinal direction. In the horizontal tilted position of the crucible the stop 7 enables the support of its entire weight P in the vertical direction, whereas it does not hamper the friction-free expansion in the upright blowing position and in the upside-down position.
  • a tiltable metallurgical vessel comprising a crucible for refining pig iron having pairs of brackets spaced around its periphery and connected to the crucible wall, each bracket having a projecting flange provided with an inclined bearing surface slanting towards the center of the crucible, a carrying ring for supporting said crucible having inclined bearing surfaces on the upper and lower surfaces thereof at points corresponding to the positions of the brackets, said ring bearing surfaces having inclined bearing surfaces slanting towards the center of the ring at angles substantially complemental to the bearing surfaces on brackets, the bearing surfaces on said brackets and the bearing surfaces on said ring facing each other, said bearing surfaces on each pair of said brackets being spaced apart a distance slightly greater than the distance between corresponding bearing surf-aces on said ring to provide a clearance therebetween.
  • each bracket is provided with two peripherally spaced-apart bearing surfaces engaging with corresponding bearing surfaces on said carrying ring, a stop between said two bearing surfaces on said bracket and a groove on the carrying ring receiving said stop, the bearing surfaces on said brackets and said ring having freedom of movement in the peripheral direction, and said stop having freedom of movement in the longitudinal direction.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
US340914A 1963-01-31 1964-01-29 Tiltable crucible or converter for refining pig iron Expired - Lifetime US3337205A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT80263A AT237659B (de) 1963-01-31 1963-01-31 Kippbarer Tiegel oder Konverter zum Frischen von Roheisen

Publications (1)

Publication Number Publication Date
US3337205A true US3337205A (en) 1967-08-22

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Family Applications (1)

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US340914A Expired - Lifetime US3337205A (en) 1963-01-31 1964-01-29 Tiltable crucible or converter for refining pig iron

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US (1) US3337205A (de)
AT (1) AT237659B (de)
GB (1) GB1057764A (de)
LU (1) LU45297A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497197A (en) * 1966-06-21 1970-02-24 Voest Ag Tiltable crucible or converter for carrying out metallurgical processes
US3503599A (en) * 1966-08-16 1970-03-31 Demag Ag Mounting for metallurgical converter
US3561744A (en) * 1969-05-27 1971-02-09 Pennsylvania Engineering Corp Stabilized mounting for boflike vessels
US3601383A (en) * 1967-09-22 1971-08-24 Demag Ag Supporting arrangement for vessels used in metallurgical processing involving heat
US3635458A (en) * 1968-10-15 1972-01-18 Voest Ag Tiltable crucible or converter
US3653649A (en) * 1970-08-20 1972-04-04 Dravo Corp Support assembly for a tiltable hot metal processing vessel
US3717333A (en) * 1969-10-09 1973-02-20 Meccaniche Ind Genovesi C M I Device for the connection between a crucible and a supporting ring
US3831916A (en) * 1971-10-11 1974-08-27 Fives Lille Cail Steel converter
US20150152514A1 (en) * 2012-05-21 2015-06-04 Danieli & C. Officine Meccaniche S.P.A. Suspension device for tilting oxygen converters and converter provided with said suspension device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1226126A (fr) * 1958-06-26 1960-07-08 Pintsch Bamag Ag Cornue pour fours métallurgiques rotatifs et notamment pour convertisseurs rotatifsrapides
US3000621A (en) * 1958-03-12 1961-09-19 Voest Ag Tiltable crucible or converter for refining crude iron
US3146983A (en) * 1961-11-08 1964-09-01 Chicago Bridge & Iron Co Mounting for invertible vessel
US3163696A (en) * 1961-05-09 1964-12-29 Stora Kopparbergs Bergslags Ab Arrangement for tiltable furnaces
US3191921A (en) * 1962-01-25 1965-06-29 Chicago Bridge & Iron Co Steel-making converter with expansionaccommodating vessel mounting

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3000621A (en) * 1958-03-12 1961-09-19 Voest Ag Tiltable crucible or converter for refining crude iron
FR1226126A (fr) * 1958-06-26 1960-07-08 Pintsch Bamag Ag Cornue pour fours métallurgiques rotatifs et notamment pour convertisseurs rotatifsrapides
US3163696A (en) * 1961-05-09 1964-12-29 Stora Kopparbergs Bergslags Ab Arrangement for tiltable furnaces
US3146983A (en) * 1961-11-08 1964-09-01 Chicago Bridge & Iron Co Mounting for invertible vessel
US3191921A (en) * 1962-01-25 1965-06-29 Chicago Bridge & Iron Co Steel-making converter with expansionaccommodating vessel mounting

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3497197A (en) * 1966-06-21 1970-02-24 Voest Ag Tiltable crucible or converter for carrying out metallurgical processes
US3503599A (en) * 1966-08-16 1970-03-31 Demag Ag Mounting for metallurgical converter
US3601383A (en) * 1967-09-22 1971-08-24 Demag Ag Supporting arrangement for vessels used in metallurgical processing involving heat
US3635458A (en) * 1968-10-15 1972-01-18 Voest Ag Tiltable crucible or converter
US3561744A (en) * 1969-05-27 1971-02-09 Pennsylvania Engineering Corp Stabilized mounting for boflike vessels
US3717333A (en) * 1969-10-09 1973-02-20 Meccaniche Ind Genovesi C M I Device for the connection between a crucible and a supporting ring
US3653649A (en) * 1970-08-20 1972-04-04 Dravo Corp Support assembly for a tiltable hot metal processing vessel
US3831916A (en) * 1971-10-11 1974-08-27 Fives Lille Cail Steel converter
US20150152514A1 (en) * 2012-05-21 2015-06-04 Danieli & C. Officine Meccaniche S.P.A. Suspension device for tilting oxygen converters and converter provided with said suspension device
US9783863B2 (en) * 2012-05-21 2017-10-10 Danieli & C. Officine Meccaniche S.P.A. Suspension device for tilting oxygen converters and converter provided with said suspension device

Also Published As

Publication number Publication date
AT237659B (de) 1964-12-28
GB1057764A (en) 1967-02-08
LU45297A1 (de) 1964-03-25

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