EP2862649A1 - Refining ladle - Google Patents

Refining ladle Download PDF

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Publication number
EP2862649A1
EP2862649A1 EP20140466022 EP14466022A EP2862649A1 EP 2862649 A1 EP2862649 A1 EP 2862649A1 EP 20140466022 EP20140466022 EP 20140466022 EP 14466022 A EP14466022 A EP 14466022A EP 2862649 A1 EP2862649 A1 EP 2862649A1
Authority
EP
European Patent Office
Prior art keywords
ladle
steel bowl
height
braces
refining
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.)
Withdrawn
Application number
EP20140466022
Other languages
German (de)
French (fr)
Inventor
Pavel Fila
Martin Balcar
Ludvik Martinek
Oldrich Suchy
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.)
ZDAS AS
Original Assignee
ZDAS AS
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 ZDAS AS filed Critical ZDAS AS
Publication of EP2862649A1 publication Critical patent/EP2862649A1/en
Withdrawn legal-status Critical Current

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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
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/0075—Treating in a ladle furnace, e.g. up-/reheating of molten steel within the ladle
    • 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
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/15—Tapping equipment; Equipment for removing or retaining slag
    • F27D3/1509—Tapping equipment
    • F27D3/1518—Tapholes
    • 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
    • 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

Definitions

  • the engineering solution concerns the refining ladle for smaller volume of fluid metal that is designed for processing steel in the equipment of secondary metallurgy, however, mainly for processing smaller amount of fluid metal than minimally needed for the existing equipment.
  • the application of the standard refining ladle that is designed for 15 - 20 t of fluid metal subsequently processed in the equipment of secondary metallurgy is always limited.
  • the minimum amount of fluid metal in the ladle is 15 t and has to be observed mainly in order to keep the minimum metal level in the ladle. This maintained level is necessary for steel heating using graphite electrodes on the ladle furnace, further for sampling, measurement of temperature, activity, hydrogen content etc.
  • the maximum amount of fluid metal in the refining ladle of secondary metallurgy is 20 t and is limited mainly in order to maintain the ladle height clearance above the steel level. It is necessary in order to ensure intensive inert gas blasting in case of vacuum steel processing.
  • the standard refining ladle with lining for 15 - 20 t of fluid metal consists of a steel bowl with braces and lifting pins made in length of 0.5 to 0.6 of ladle steel bowl height and the ladle bowl height to ladle mean diameter ratio is 1.2 to 1.3.
  • the bowl inside of the standard refining ladle is provided with insulation with permanent lining in the ladle bottom and walls made of fireclay blocks, further then with working lining of the walls made of magnesite building materials and working lining of the bottom made of monolithic refractory concrete.
  • the ladle bottom is provided with a drain opening closed by gate valve. Dimensions of the standard refining ladle do not allow to process smaller amount of fluid metal than 15 tons in the given equipment.
  • the above mentioned deficiencies are eliminated by the refining ladle for smaller volume of fluid metal 6 - 14 t, consisting of the steel bowl with the braces and lifting pins made in length of 0.7 to 0.8 of the ladle steel bowl height, when the ladle bowl height to ladle mean diameter ratio is 0.9 to 1.0.
  • the ladle inside is provided with the insulation with the permanent and working lining of the ladle walls and bottom.
  • the refining ladle having its steel bowl and braces with lifting pins acc. to the above mentioned engineering solution enables to process smaller amount of fluid metal in the given equipment for secondary metallurgy than the limit amount for the given equipment.
  • the engineering solution is clarified more closely by means of a drawing.
  • the Fig. 1 shows the sectional view of the refining ladle that consists of the steel bowl with the braces and lifting pins acc. to the engineering solution, the insulation, permanent and working lining in the ladle walls and bottom and the drain opening closed with the gate valve.
  • the ladle consists of the steel bowl 1 with the braces 2 and the lifting pins 3 .
  • the insulation 4 with the permanent lining 5 made of fireclay blocks in the ladle walls and bottom.
  • the working lining 6 of the ladle walls is made of magnesite building materials.
  • the working lining 7 of the ladle bottom is made of monolithic refractory concrete.
  • the ladle capacity reduction is achieved by change of the braces 2 length to ladle steel bowl 1 height h ratio and by change of the ladle height h to ladle mean diameter d ratio.
  • the refining ladle can mainly be used when processing smaller amount of metal than minimally needed for the given equipment of secondary metallurgy.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Steel In Its Molten State (AREA)

Abstract

The invention deals with the refining ladle for smaller volume of fluid metal 6 - 14 t, that consists of the steel bowl (1) with the side braces (2) and the lifting pins (3), which inside is provided with the insulation (4) with the permanent lining (5) and the working lining (6) and (7) of the ladle walls and bottom with the drain opening (8). The braces (2) located on the ladle steel bowl (1) with the lifting pins (3) are made in length of 0.7 h to 0.8 h, where h is the ladle steel bowl height (1), and the ladle steel bowl (1) height h to ladle mean diameter d ratio is 0.9 to 1.0.

Description

    Technical Field
  • The engineering solution concerns the refining ladle for smaller volume of fluid metal that is designed for processing steel in the equipment of secondary metallurgy, however, mainly for processing smaller amount of fluid metal than minimally needed for the existing equipment.
    • Present State of the Art
  • At the present time, the application of the standard refining ladle that is designed for 15 - 20 t of fluid metal subsequently processed in the equipment of secondary metallurgy (ladle furnace, vacuum station) is always limited. The minimum amount of fluid metal in the ladle is 15 t and has to be observed mainly in order to keep the minimum metal level in the ladle. This maintained level is necessary for steel heating using graphite electrodes on the ladle furnace, further for sampling, measurement of temperature, activity, hydrogen content etc. The maximum amount of fluid metal in the refining ladle of secondary metallurgy is 20 t and is limited mainly in order to maintain the ladle height clearance above the steel level. It is necessary in order to ensure intensive inert gas blasting in case of vacuum steel processing. The standard refining ladle with lining for 15 - 20 t of fluid metal consists of a steel bowl with braces and lifting pins made in length of 0.5 to 0.6 of ladle steel bowl height and the ladle bowl height to ladle mean diameter ratio is 1.2 to 1.3. The bowl inside of the standard refining ladle is provided with insulation with permanent lining in the ladle bottom and walls made of fireclay blocks, further then with working lining of the walls made of magnesite building materials and working lining of the bottom made of monolithic refractory concrete. The ladle bottom is provided with a drain opening closed by gate valve. Dimensions of the standard refining ladle do not allow to process smaller amount of fluid metal than 15 tons in the given equipment.
    • Essence of the Engineering Solution
  • To a great extent, the above mentioned deficiencies are eliminated by the refining ladle for smaller volume of fluid metal 6 - 14 t, consisting of the steel bowl with the braces and lifting pins made in length of 0.7 to 0.8 of the ladle steel bowl height, when the ladle bowl height to ladle mean diameter ratio is 0.9 to 1.0. The ladle inside is provided with the insulation with the permanent and working lining of the ladle walls and bottom.
  • This arrangement results in ladle capacity reduction, while the steel level with smaller mass of fluid metal in the ladle remains saved. Saved at the same level also remains the ladle edge that is needed to fit and seal the ladle cover when processing in the equipment of secondary metallurgy.
  • The refining ladle having its steel bowl and braces with lifting pins acc. to the above mentioned engineering solution enables to process smaller amount of fluid metal in the given equipment for secondary metallurgy than the limit amount for the given equipment.
    • Pictures in the Drawing
  • The engineering solution is clarified more closely by means of a drawing. The Fig. 1 shows the sectional view of the refining ladle that consists of the steel bowl with the braces and lifting pins acc. to the engineering solution, the insulation, permanent and working lining in the ladle walls and bottom and the drain opening closed with the gate valve.
    • Example of Engineering Solution
  • The ladle consists of the steel bowl 1 with the braces 2 and the lifting pins 3. Provided on the bowl 1 inside is the insulation 4 with the permanent lining 5 made of fireclay blocks in the ladle walls and bottom. The working lining 6 of the ladle walls is made of magnesite building materials. The working lining 7 of the ladle bottom is made of monolithic refractory concrete. There is a drain opening 8 in the ladle bottom closed by the gate valve 9. The ladle capacity reduction is achieved by change of the braces 2 length to ladle steel bowl 1 height h ratio and by change of the ladle height h to ladle mean diameter d ratio.
    • Industrial Applicability
  • Acc. to the engineering solution, the refining ladle can mainly be used when processing smaller amount of metal than minimally needed for the given equipment of secondary metallurgy.

Claims (1)

  1. The refining ladle for smaller volume of fluid metal 6 - 14 t, consisting of the steel bowl (1) with the side braces (2) and the lifting pins (3), which inside is provided with the insulation (4) with the permanent lining (5) and the working lining (6) and (7) of the ladle walls and bottom with the drain opening (8), distinguished by the fact, that the braces (2) located on the ladle steel bowl (1) with the lifting pins (3) are made in length of 0.7 h to 0.8 h, where h is the ladle steel bowl height (1), and the ladle steel bowl (1) height h to ladle mean diameter d ratio is 0.9 to 1.0.
EP20140466022 2013-10-21 2014-10-20 Refining ladle Withdrawn EP2862649A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CZ2013-809A CZ305115B6 (en) 2013-10-21 2013-10-21 Refining ladle

Publications (1)

Publication Number Publication Date
EP2862649A1 true EP2862649A1 (en) 2015-04-22

Family

ID=51795599

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20140466022 Withdrawn EP2862649A1 (en) 2013-10-21 2014-10-20 Refining ladle

Country Status (2)

Country Link
EP (1) EP2862649A1 (en)
CZ (1) CZ305115B6 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647019A (en) * 1986-04-01 1987-03-03 Union Carbide Corporation Very small refining vessel
EP1386011A1 (en) * 2001-04-02 2004-02-04 Nucor Corporation Ladle refining of steel
DE102004056957A1 (en) * 2004-01-13 2005-08-04 Mannesmannröhren-Werke Ag Metallurgical vessel useful for transport and handling of molten melts, especially steel melts providing a high degree of stiffness even at full volume combined with low net weight

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008173675A (en) * 2007-01-19 2008-07-31 Sanyo Special Steel Co Ltd Ladle for ladle refining
CN201190170Y (en) * 2008-08-13 2009-02-04 辽宁凯瑞特钢有限公司 Oval-shaped refining ladle
RU2405046C1 (en) * 2009-07-17 2010-11-27 Гурам Кашакашвили Method of steel smelting, deoxidation, alloying and treatment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4647019A (en) * 1986-04-01 1987-03-03 Union Carbide Corporation Very small refining vessel
EP1386011A1 (en) * 2001-04-02 2004-02-04 Nucor Corporation Ladle refining of steel
DE102004056957A1 (en) * 2004-01-13 2005-08-04 Mannesmannröhren-Werke Ag Metallurgical vessel useful for transport and handling of molten melts, especially steel melts providing a high degree of stiffness even at full volume combined with low net weight

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
H HEARNDEN: "POST TAPHOLE PRACTICES ADDING VALUE", TENTH INTERNATIONAL FERROALLOYS CONGRESS (INFACON X), 4 February 2004 (2004-02-04), Cape Town, South Africa, pages 534 - 540, XP055174675, ISBN: 978-0-95-846635-6 *
HASMET TURKOGLU ET AL: "Mixing Time and Liquid Circulation Rate in Steelmaking Ladles with Vertical Gas Injection.", ISIJ INTERNATIONAL, vol. 31, no. 12, 1 January 1991 (1991-01-01), pages 1371 - 1380, XP055174708, ISSN: 0915-1559, DOI: 10.2355/isijinternational.31.1371 *
L W HELLE: "The calculation of the time required to mix liquid metal in a ladle by gas rinsing", JOURNAL OF THE SOUTH AFRICAN INSTITUTE OF MINING AND METALLURGY, 1 December 1981 (1981-12-01), pages 329 - 337, XP055174692 *
M BHANDARI ET AL: "INDUREF' - INDUCTION LADLE REFINING FURNACE FOR SECONDARY METALLURGICAL APPLICATIONS", TENTH INTERNATIONAL FERROALLOYS CONGRESS (INFACON X), 4 February 2004 (2004-02-04), Cape Town, South Africa, pages 522 - 527, XP055174681, ISBN: 978-0-95-846635-6 *

Also Published As

Publication number Publication date
CZ2013809A3 (en) 2015-05-06
CZ305115B6 (en) 2015-05-06

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