EP1222982B1 - Lining for ladles, tundishes and similar receptacles used in the iron and steel industry - Google Patents

Lining for ladles, tundishes and similar receptacles used in the iron and steel industry Download PDF

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Publication number
EP1222982B1
EP1222982B1 EP02000486A EP02000486A EP1222982B1 EP 1222982 B1 EP1222982 B1 EP 1222982B1 EP 02000486 A EP02000486 A EP 02000486A EP 02000486 A EP02000486 A EP 02000486A EP 1222982 B1 EP1222982 B1 EP 1222982B1
Authority
EP
European Patent Office
Prior art keywords
layer
lining
bricks
binding material
ladles
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 - Lifetime
Application number
EP02000486A
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German (de)
English (en)
French (fr)
Other versions
EP1222982A3 (en
EP1222982A2 (en
Inventor
Luigi Ture
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.)
Individual
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Individual
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 Individual filed Critical Individual
Publication of EP1222982A2 publication Critical patent/EP1222982A2/en
Publication of EP1222982A3 publication Critical patent/EP1222982A3/en
Application granted granted Critical
Publication of EP1222982B1 publication Critical patent/EP1222982B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B22D41/02—Linings

Definitions

  • the present invention relates to one-piece lining for ladles, tundishes and similar receptacles used in iron and steel industry. It comprises one or more layers of refractory bricks, which are joined together on every contact surfaces with a low-expansion, heat resistant stucco, said stucco being treated with a carbon-based additive as the one described in the European patent No. 0505542.
  • molten metal from the blast furnace is taken to steel meting shop where further reduction of impurities is done in converters.
  • the liquid steel is taken into ladles and afterwards in other containers or tundishes.
  • Ladles are metal receptacles lined with refractory bricks and a refractory wall, which is in contact with the molten metal and must be periodically replaced (rebricking).
  • Tundishes are containers made of steel and lined with some brick layers coated with 3-4 cm, highly refractory materials.
  • said receptacles and, in particular, ladles and buckets are subjected to oxidation of the metal sheets with the consequent reduction of the wall thickness; lastly, also the carbon-based bricks subjected to slags attack, are oxidized. With time and at a temperature ranging between 800°C and 1000°C, oxygen decarburises the bricks, lowering their mechanical resistance, and causing wear and carbon release in the produced steel.
  • the invention solves the above mentioned problems being characterised as a one-piece lining comprising some layers of refractory bricks joined together with alumina- or zircon-based stuccos.
  • These stuccos, treated with a carbon additive already described and claimed in the European patent No. 0505542, are thermal resistant and have a low coefficient of thermal expansion.
  • Fig. 1 describes a practical, preferred but not restrictive example, how said coating can be applied to a ladle surface.
  • the lining consists of a not penetrable wall pattern made of horizontal and vertical joints with suitable binding materials that makes a real barrier to the liquid steel.
  • (1) is the ladle metal shell, on which a first 2-mm layer of protective, binding and insulating stucco (2) is applied.
  • this material can be composed of aluminum silicate, sand and ceramic fibers.
  • a first protective layer (3) made of slabs or bricks (flat or with a proper curvature) is laid on said stucco (2) and joined together with the alumina- and/or zirconium-based, low expansion stucco (5). Before the next protective layer is laid, a further layer of the material (5) is applied on the bricks surface.
  • Said stucco layer must be applied gradually, on small portions of the wall (some square meters), to avoid its complete hardening before the bricks are laid down. Then, the bricks (4) are laid down, joined with the same material (5).
  • the most important part of the coating is a layer (6) made of the very same material of the layer (5).
  • Said layer which acts as a strong barrier to molten steel or cast iron infiltrations, can have a thickness of approximately 2 mm and must be applied on the whole surface; then it must dry completely (about 4-8 hours, according to the external temperature) before laying the final layer of the wall (7).
  • said stuccos (5), (6) are additivated with an additive described in the European Patent 0505542.
  • Said additive for bonding agents with insulating, impermeabilizing and antishrink properties comprising a mixture of carbonates which, expressed as their respective oxides, comprises in weight percentages, 0 to 1% Fe 2 O 3 , 65 to 80% CaO, 20 to 30% SiO 2 , 0 to 2% Al 2 O 3 and 0 to 1% MgO.
  • the additivated stucco (5), (6) will be prepared in liquid form, mixing the components with an appropriate amount of water, so as to obtain a final mix in the form of a mortar; at least one resin selected from epoxy, acrylic, phenolic, polyurethane, or other resins known for uses with bonding agents will be added; then the composition will to be heated.
  • the advantages of such coating system are: the reduction of infiltrations due to the stucco interlayers that cool down the molten steel which solidifies into thin sheets easily removable; reduction of maintenance time and longer lifetime of the refractory materials; reduction of ladles cracking and leakage; lower temperature of the shell external surface and, consequently, lower steel heat losses.
  • the use of such insulating and heat resistant coating for such receptacles avoids the oxidation of the sheet metal walls, their thickness reduction and allows a lower carbon release in the produced steel, in particular if carbon bricks are used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Ladders (AREA)
  • Coating With Molten Metal (AREA)
EP02000486A 2001-01-16 2002-01-08 Lining for ladles, tundishes and similar receptacles used in the iron and steel industry Expired - Lifetime EP1222982B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2001BA000004A ITBA20010004A1 (it) 2001-01-16 2001-01-16 Rivestimento monoblocco per siviere,paniere e contenitori similari utilizzati nell'industria siderurgica.
ITBA010004 2001-01-16

Publications (3)

Publication Number Publication Date
EP1222982A2 EP1222982A2 (en) 2002-07-17
EP1222982A3 EP1222982A3 (en) 2003-07-16
EP1222982B1 true EP1222982B1 (en) 2005-04-20

Family

ID=11437719

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02000486A Expired - Lifetime EP1222982B1 (en) 2001-01-16 2002-01-08 Lining for ladles, tundishes and similar receptacles used in the iron and steel industry

Country Status (5)

Country Link
EP (1) EP1222982B1 (es)
AT (1) ATE293504T1 (es)
DE (1) DE60203744T2 (es)
ES (1) ES2240577T3 (es)
IT (1) ITBA20010004A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107427904A (zh) * 2015-03-24 2017-12-01 维苏威坩埚公司 具有配置的穿孔结构的冶金容器衬里

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050038442A (ko) * 2003-10-22 2005-04-27 삼성광주전자 주식회사 진공청소기의 접이식 흡입 브러시
CN103464735B (zh) * 2013-09-29 2016-03-30 武汉钢铁集团耐火材料有限责任公司 提高冶炼钢包使用效率的方法及其高寿命低材耗冶炼钢包
WO2015043452A1 (zh) * 2013-09-29 2015-04-02 武汉钢铁(集团)公司 提高冶炼钢包使用效率的方法及其高寿命低材耗冶炼钢包
CN112264612B (zh) * 2020-09-30 2022-01-18 江苏沙钢集团有限公司 一种钢包砌筑结构及钢包使用方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3528647A (en) * 1968-12-13 1970-09-15 Koppers Co Inc Insulating structure for use between the steel shell and the internal refractory lining in a metallurgical furnace
LU71573A1 (es) * 1974-12-30 1976-11-11
JPS63119971A (ja) * 1986-11-05 1988-05-24 Kobe Steel Ltd 溶鋼用鍋におけるノズル部周囲の煉瓦構造
JPH01289564A (ja) * 1988-05-13 1989-11-21 Aichi Steel Works Ltd 溶鋼用取鍋
DD282635A5 (de) * 1989-04-28 1990-09-19 Bandstahlkombinat Matern Veb Feuerfeste futteranordnung fuer metallurgische gefaesse
IT1243637B (it) * 1990-10-17 1994-06-16 Somergom Srl Additivo in polvere per massetti, intonaci, calcestruzzi e prefabbricati in genere con proprieta' isolanti ed impermeabilizzanti e con caratteristiche antiritiro.
DE4142029C2 (de) * 1991-12-19 1994-06-16 Didier Werke Ag Stahlgiesspfanne
JPH05296667A (ja) * 1992-04-17 1993-11-09 Nippon Steel Corp 溶融金属容器の築造構造

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107427904A (zh) * 2015-03-24 2017-12-01 维苏威坩埚公司 具有配置的穿孔结构的冶金容器衬里
CN107427904B (zh) * 2015-03-24 2019-04-26 维苏威美国公司 具有配置的穿孔结构的冶金容器衬里
US10507523B2 (en) 2015-03-24 2019-12-17 Vesuvius Usa Corporation Metallurgical vessel lining with configured perforation structure

Also Published As

Publication number Publication date
ATE293504T1 (de) 2005-05-15
ES2240577T3 (es) 2005-10-16
EP1222982A3 (en) 2003-07-16
EP1222982A2 (en) 2002-07-17
ITBA20010004A1 (it) 2002-07-16
DE60203744D1 (de) 2005-05-25
DE60203744T2 (de) 2006-03-02

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