EP0214882A1 - Feuerfeste Auskleidung eines metallurgischen Gefässes und Verfahren zu ihrer Herstellung - Google Patents

Feuerfeste Auskleidung eines metallurgischen Gefässes und Verfahren zu ihrer Herstellung Download PDF

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Publication number
EP0214882A1
EP0214882A1 EP86401649A EP86401649A EP0214882A1 EP 0214882 A1 EP0214882 A1 EP 0214882A1 EP 86401649 A EP86401649 A EP 86401649A EP 86401649 A EP86401649 A EP 86401649A EP 0214882 A1 EP0214882 A1 EP 0214882A1
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EP
European Patent Office
Prior art keywords
layer
liquid metal
sinterable
layers
coating
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.)
Granted
Application number
EP86401649A
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English (en)
French (fr)
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EP0214882B1 (de
EP0214882B2 (de
Inventor
Jean-Charles Daussan
André Daussan
Gérard Daussan
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.)
Daussan SAS
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Daussan SAS
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Application filed by Daussan SAS filed Critical Daussan SAS
Priority to AT86401649T priority Critical patent/ATE40804T1/de
Publication of EP0214882A1 publication Critical patent/EP0214882A1/de
Priority to MYPI87002284A priority patent/MY101458A/en
Publication of EP0214882B1 publication Critical patent/EP0214882B1/de
Application granted granted Critical
Publication of EP0214882B2 publication Critical patent/EP0214882B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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 a coating for protecting the interior of a metallurgical container intended to contain a liquid metal such as liquid steel.
  • the invention also relates to a method for producing such a protective coating.
  • the metallurgical container which it is desired to protect by means of a coating in accordance with the invention may be a ladle, a tundish or a slag tank.
  • These metallurgical vessels generally comprise an outer steel casing which is coated internally with a lining of refractory material such as bricks made of magnesia, alumina or silico-aluminous or of refractory cement.
  • French patent 2,316,027 recommends the protection of all the interior parts of a liquid metal transfer container by the interposition between the permanent refractory lining and the liquid metal of sinterable elements, generally in the form of plates.
  • French patent 2,393,637 describes a similar protection, made with or without the use of prefabricated elements, refractory insulators sintered in contact with liquid steel and made integral with the lining. permanent refractory by applying a composition of a nature substantially identical to that of the aforementioned prefabricated elements.
  • French Patent 2,451,789 relates to protection of the permanent refractory lining of a metallurgical container, comprising between this refractory lining and the coating coming into contact with liquid steel, a relatively compressible layer based on organic fibers and / or inorganic coated in a binder.
  • French patent 2,393,637 already cited above also describes the possibility of projecting or introducing using a mold leaving between itself and the wall to be coated, a uniform space into which the composition is introduced by tamping. and / or by blowing, by suction or by vibration.
  • the protective coatings formed by the plates or prefabricated elements are relatively expensive and complicated to implement. In addition, these prefabricated plates or elements generally do not resist beyond five to six successive flows.
  • these plates must be preheated to a temperature above 600 ° C to remove moisture and the organic compounds they contain, in order to avoid any pollution of the liquid metal by hydrogen.
  • the plates or prefabricated elements try to curve under the effect of the heat, creating between the joints of these plates or elements, spaces in which liquid metal can infiltrate which can thus reach the permanent refractory lining.
  • the object of the present invention is to remedy the drawbacks of the aforementioned known solutions by creating a protective coating which is both inexpensive, easy to use, which withstands many successive flows, which withstands temperatures without damage. high preheating, which allows to maintain a high power of thermal insulation during many successive castings and which avoids any risk of adhesion between the coating and the wall of the metallurgical container, thus considerably facilitating the cleaning thereof this at the end of casting.
  • the coating for protecting the interior of a metallurgical container intended to contain a liquid metal is characterized in that it comprises at least the following two layers: a layer of which the composition and the particle size of the refractory inorganic particles are such that this sintered layer throughout its mass, under the effect of the heat of the liquid metal contained in the metallurgical container and, a layer whose composition and particle size of the refractory inorganic particles are such that this layer does not sinter or only sinter partially, so as to remain brittle, even when the first layer is completely sintered.
  • the coating according to the invention thus comprises at least two separate layers.
  • One of these two layers gradually sintered when it is in contact with the liquid metal. After a long contact time, for example after ten successive flows, this layer is sintered throughout its mass.
  • the other layer does not sinter or sinter only partially, so as to remain brittle, even when the first layer is completely sintered.
  • this layer does not adhere to this lining. Consequently, any risk of adhesion between the coating and this refractory lining is avoided, even when the first layer is completely sintered, so that cleaning at the end of casting of the interior of the metallurgical container is very easy and the refractory lining of this container is not likely to be damaged, neither during pouring, nor during cleaning.
  • the duration of use of a two-layer coating is surprisingly significantly greater than that of a coating formed of a single layer, sinterable throughout its mass, of the same thickness as that of the two layers of the coating according to the invention.
  • Sintering is the physico-chemical phenomenon which makes it possible to create a bond between two inorganic particles. This sintering takes place at a temperature significantly lower than the melting temperature of these particles. This sintering is favored by the high pressure exerted by the liquid metal on the coating according to the invention, by the possible presence, within this coating of very fine particles, of fluxes (inorganic particles having a melting point lower than that other particles that are refractory) and by using the lowest possible binder content, so that the inorganic particles are arranged very close to each other.
  • the method for producing the coating according to the invention consists in successively applying the different layers from a mud comprising the solid ingredients of the layer which it is desired to form, mixed with liquid for example ethylene glycol alcohol and / or water in a proportion of 3 to 30% by weight of liquid, the density of this sludge varying according to the layer, between 0.8 and 3.5 kg / dm3, after which the different layers are dried.
  • This drying is carried out at a temperature between 100 and 200 ° C to remove the free water.
  • the different layers are preheated to a temperature of between 600 and 1450 ° C. to eliminate the water of constitution and / or of crystallization to avoid any pollution of the liquid metal by hydrogen.
  • the mud is applied, preferably by spraying and / or spraying, but can also be carried out by other mechanical means such as: molding, injection, vibration, by gravity, trowelling or any other means of application. .
  • the method according to the invention is both very economical and is perfectly suited to the application of successive layers having different compositions.
  • the single appended figure shows, by way of nonlimiting example, in cross section, a coating according to the invention, with three superimposed layers, applied inside a tundish.
  • the flow distributor intended to contain liquid steel comprises an outer steel casing 1 comprising on its internal faces a permanent refractory lining composed of refractory bricks 2.
  • a protective coating is applied in the form of mud, which, in the example shown, comprises three layers 3, 4, 5.
  • the outer layer 3 intended to come into contact with the liquid metal which is poured into the tundish consists of a mixture of refractory inorganic particles, linked together by means of an organic and / or inorganic binder.
  • the composition of these inorganic particles and their particle size are such that these particles can sinter, that is to say bind to each other to create a coherent mass, in contact with the liquid metal.
  • this sintering is carried out very gradually and reaches the entire thickness of the layer 3, that is to say the entire mass of this layer, after a certain contact time which generally corresponds to several hours and several successive flows.
  • the thickness of this layer 3 is generally between 1 and 10 cm.
  • the intermediate layer 4 is also constituted by a mixture of inorganic particles linked together by means of an organic and / or inorganic binder.
  • the composition and particle size of these particles are such that these particles only partially sinter, so that this layer 4 remains brittle (or meringuable according to the expression used in steelmakers), even when the outer layer 3 is completely sintered in its mass.
  • the thickness of this layer 4 is generally of the same order of magnitude as that of layer 3.
  • Layer 5 is in direct contact with the lining of refractory bricks 2.
  • This layer 5 is also constituted by a mixture of refractory inorganic particles, linked together by a binder organic and / or inorganic.
  • the layer 5 is not sinterable, so that after destruction under the effect of heat, of the organic and / or inorganic binder which ensures the initial cohesion of this layer , this layer 5 becomes powdery and no longer has any adhesion with the lining of refractory bricks 2.
  • the more or less sinterable nature of the layers 3 and 4 depends on the nature and the composition of the refractory inorganic particles, on the particle size thereof, on the possible presence of fluxes such as iron oxide or carbonate of alkali or alkaline earth metals and binder content.
  • a composition containing a large proportion of refractory inorganic particles will preferably be used.
  • the proportion by weight of these will preferably be between 90 and 99.7%.
  • the particle size of these particles is preferably between 0 and 4 mm, which implies that some of them are very fine, this fineness favoring sintering.
  • the intermediate layer 4 contains a proportion of refractory inorganic particles lower than that of the completely sinterable layer 3. This proportion is preferably between 75 and 95% by weight.
  • the particle size of these particles is advantageously between 0 and 3 mm, preferably between 0.25 and 2.5 mm, so that very fine particles of particle size less than 0.5 mm are absent from this composition, so as to limit sintering.
  • this layer 4 can only partially sinter while remaining brittle, that is to say brittle, even when the layer 3 is completely sintered in its mass.
  • this intermediate layer 4 only partially sintered, this intermediate layer retains its thermal insulation properties, so that it makes it possible to avoid cooling of the liquid metal, even when the outer layer 3 is completely sintered and thus has lost its initial thermal insulation properties.
  • the layer 5 adjacent to the refractory permanent lining 2 preferably contains between 65 and 96% by weight of refractory inorganic particles whose particle size is preferably between 0 and 5 mm.
  • This layer 5 due to its lower content of refractory inorganic particles, and the fact that it is separated from the sinterable layer 3, by an intermediate layer 4, thermally insulating, does not sinter under the effect of heat, so that after destruction of the binder initially ensuring the cohesion of the layer, the latter loses all its cohesion and becomes pulverulent.
  • the coating according to the invention not only effectively protects the permanent refractory lining 2 but it makes it very easy to clean the interior of the distributor at the end of casting.
  • these layers are successively applied to the walls of the tundish, in the form of sludge containing the solid ingredients of these layers, mixed with a liquid for example such as water and / or oils, in an amount of 3 to 30% by weight of liquid.
  • a liquid for example such as water and / or oils
  • An alcohol may also be suitable (for example: ethylene glycol).
  • the mud applied must be sufficiently pasty, so as to adhere to the walls of the tundish, or to the other layers, without sinking.
  • the density of the mud applied varies according to the layers 5, 4, 3, between 0.8 kg / dm3 and 3.5 kg / dm3, the outer layer 3 being denser than the intermediate layer 4 and the latter being itself even denser than the layer 5 adjacent to the refractory lining 2.
  • the layers 3, 4, 5 thus applied are then dried at a temperature of between 100 and 200 ° C., for example by buckling and / or by blowing hot air or by means of electric heating resistors, placed inside. of the tundish and fixed to a cover closing the latter. This drying eliminates the free water from the mud which constitutes the different layers.
  • the layers 3, 4, 5 are preheated to a temperature equal to at least 600 ° C., this temperature possibly reaching 1450 ° C.
  • the inorganic and / or organic binders which decompose the initial cohesion of the layers 3, 4, 5 are decomposed.
  • This heating at high temperature has the effect of partially sintering the outer layer 3.
  • This partial sintering makes it possible to restore the cohesion of the entire coating.
  • This cohesion makes it possible to prevent, when the liquid metal is poured into the tundish, that the inorganic particles detach from the coating to pollute the liquid metal.
  • the layer 5 adjacent to the permanent refractory lining 2 does not sinter and becomes powdery, this layer 5 has no adhesion with respect to this lining, so that at the end of casting, the removal of the covering is very easy and there is no risk of damaging the refractory lining by trying to remove by means of tools such as jackhammers, the solidified masses adhering to this permanent refractory lining.
  • one of the layers 4 or 5 can be omitted, so as to limit the number of layers to at least 2.
  • layers 3 and 4 can be inverted, that is to say by placing the sinterable layer 3 between the non-sinterable layer 5 and the partially sinterable layer 4.
  • the method according to the invention makes it possible to apply to the level of the slag 6 area supernatant the liquid metal, an additional thickness 7 of the sinterable layer 3.
  • This additional thickness 7 may have the same composition as the layer 3 so as to sinter at the same time as this.
  • This additional thickness 7 makes it possible to reinforce the protection provided by the coating according to the invention, in the most vulnerable zone of the flow distributor, namely the slag zone.
  • This additional thickness 7 may also have a composition different from that of the layer 3 so as to provide increased protection against slag.
  • the composition of the layer forming this additional thickness 7 can thus contain highly refractory particles such as zircon and / or zirconia and / or carbon, and / or silicon carbide.
  • the thickness of the coating can, of course, also be increased in other places in the tundish and in part in the impact zone of the casting jet which is poured from the tundish placed above the tundish. casting.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Making Paper Articles (AREA)
EP86401649A 1985-07-24 1986-07-23 Feuerfeste Auskleidung eines metallurgischen Gefässes und Verfahren zu ihrer Herstellung Expired - Lifetime EP0214882B2 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT86401649T ATE40804T1 (de) 1985-07-24 1986-07-23 Feuerfeste auskleidung eines metallurgischen gefaesses und verfahren zu ihrer herstellung.
MYPI87002284A MY101458A (en) 1985-07-24 1987-09-29 A lining for protecting the interior of a metallurgical vessel and a method for forming said lining

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8511327 1985-07-24
FR8511327A FR2585273B1 (fr) 1985-07-24 1985-07-24 Revetement pour proteger l'interieur d'un recipient metallurgique et procede pour realiser ce revetement

Publications (3)

Publication Number Publication Date
EP0214882A1 true EP0214882A1 (de) 1987-03-18
EP0214882B1 EP0214882B1 (de) 1989-02-15
EP0214882B2 EP0214882B2 (de) 1997-09-24

Family

ID=9321609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86401649A Expired - Lifetime EP0214882B2 (de) 1985-07-24 1986-07-23 Feuerfeste Auskleidung eines metallurgischen Gefässes und Verfahren zu ihrer Herstellung

Country Status (10)

Country Link
US (1) US4799652A (de)
EP (1) EP0214882B2 (de)
AT (1) ATE40804T1 (de)
AU (1) AU586519B2 (de)
CA (1) CA1266776A (de)
DE (1) DE3662086D1 (de)
ES (1) ES2001336A6 (de)
FR (1) FR2585273B1 (de)
MY (1) MY101458A (de)
ZA (1) ZA865500B (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995025610A1 (fr) * 1994-03-23 1995-09-28 Daussan Et Compagnie Procede et dispositif pour projeter sur une paroi une boue aqueuse pour former un revetement, et revetement ainsi obtenu
CN102062540A (zh) * 2010-06-18 2011-05-18 四川龙蟒矿冶有限责任公司 一种复合结构的电炉炉衬

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2606785A1 (fr) * 1986-11-13 1988-05-20 Daussan & Co Joint pateux pour realiser l'etancheite entre des surfaces soumises a la chaleur et devant etre jointoyees, procede de preparation et d'application de ce joint
FR2625924B1 (fr) * 1988-01-20 1990-05-11 Daussan & Co Dispositif pour projeter un revetement sur la surface interieure d'un recipient de transvasement de metal liquide et procede s'y rapportant
FR2646367B1 (fr) * 1989-04-26 1994-04-01 Daussan Cie Procede et installation pour realiser un revetement sur les parois interieures d'un recipient metallurgique
EP0399786A3 (de) * 1989-05-25 1992-05-27 Alcan International Limited Feuerfeste Auskleidungen, beständig gegen Natrium und Natriumsalze
FR2657549B1 (fr) * 1990-01-26 1992-04-24 Daussan & Co Procede pour appliquer sur les faces interieures d'un recipient metallurgique un revetement de protection comportant au moins deux couches et revetement de protection ainsi obtenu.
LU87757A1 (fr) * 1990-06-27 1992-01-15 Daussan Et Compagnie Societe E Procede pour appliquer sur les faces interieures d'un recipient metallurgique un revetement de protection comportant au moins deux couches
DE4240287C1 (de) * 1992-12-01 1994-02-17 Veitsch Radex Ag Vorrichtung und Verfahren zum Aufbringen einer feuerfesten Isoliermasse auf die Wand eines metallurgischen Gefäßes
DE4319393C1 (de) * 1993-06-11 1994-06-01 Chemikalien Ges Hans Lungmus M Verfahren zum Herstellen von feuerfesten Tiegeln für Stahlbehandlungspfannen
US5507474A (en) * 1994-01-13 1996-04-16 Minerals Technologies, Inc. Lining for molten metal handling vessles
FR2732915B1 (fr) * 1995-04-14 1997-06-13 Daussan & Co Procede pour appliquer a l'interieur d'un recipient metallurgique un revetement de protection comportant au moins deux couches
US5885510A (en) * 1997-02-07 1999-03-23 Alcoa Chemie Gmbh Methods of making refractory bodies
US6165926A (en) * 1998-06-24 2000-12-26 Alcoa Chemie Gmbh Castable refractory composition and methods of making refractory bodies
DE10052352B4 (de) 2000-10-21 2005-04-14 Refractory Intellectual Property Gmbh & Co. Kg Verwendung eines Reduktionsmittels in MgO-Sinter-Massen
WO2009152330A1 (en) * 2008-06-12 2009-12-17 Latitude 18, Inc Inorganic phosphate resins and method for their manufacture
CN102781871B (zh) 2009-12-11 2014-11-26 18纬度有限公司 无机磷酸盐组合物及方法
US8557342B2 (en) * 2009-12-11 2013-10-15 Latitude 18, Inc. Inorganic phosphate corrosion resistant coatings
US20130139930A1 (en) 2009-12-18 2013-06-06 Latitude 18, Inc. Inorganic phosphate corrosion resistant coatings
KR101869568B1 (ko) * 2009-12-30 2018-06-20 쓰리엠 이노베이티브 프로퍼티즈 컴파니 마스크 본체 내에 팽창 메시를 갖는 안면부 여과식 호흡기
US8425717B2 (en) 2010-02-09 2013-04-23 Latitude 18, Inc. Phosphate bonded composites and methods
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
TWI841524B (zh) * 2017-04-17 2024-05-11 美商維蘇威美國公司 多孔耐火澆鑄材料、其用途及製造
CN111960812A (zh) * 2020-08-30 2020-11-20 洛阳欧斯特节能科技有限公司 一种高温不定型纳米耐火保温材料及其制备方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345059A (en) * 1965-03-12 1967-10-03 United States Steel Corp Crucible for holding molten metal
FR2042857A5 (en) * 1969-04-05 1971-02-12 Ver Deutsche Metallwerke Ag Layer crucibles for induction furnaces
FR2393637A1 (fr) * 1977-06-07 1979-01-05 Daussan & Co Composition pour revetement de repartiteur de coulee, procede pour revetir ce dernier et revetement obtenu
EP0064863A1 (de) * 1981-05-08 1982-11-17 Quigley Company Inc. Monolithische feuerfeste Schicht für metallurgische Gefässe und Anwendungsverfahren

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1381171A (en) * 1918-01-03 1921-06-14 William A Darrah Crucible and method of manufacture
GB1469513A (en) * 1973-07-30 1977-04-06 Foseco Trading Ag Tundishes
GB1544637A (en) * 1975-11-10 1979-04-25 Foseco Trading Ag Lining of molten metal containers
JPS53106636A (en) * 1977-03-02 1978-09-16 Nippon Kokan Kk Casting vessel having basic lining and use thereof
FR2451789A1 (fr) * 1979-03-22 1980-10-17 Daussan & Co Revetement thermiquement isolant pour recipients metallurgiques et procede s'y rapportant
DE3152796C2 (de) * 1981-03-31 1987-01-22 Institut problem lit'ja Akademii Nauk Ukrainskoj SSR, Kiev Verfahren zum Auskleiden eines h}ttenm{nnischen Aggregats
FR2516415A1 (fr) * 1981-11-13 1983-05-20 Daussan & Co Dispositif pour eliminer les inclusions contenues dans les metaux liquides
US4422625A (en) * 1982-02-23 1983-12-27 Fmc Corporation Foundry pouring ladle protective liner
CH686374A5 (de) * 1993-10-13 1996-03-15 Alusuisse Lonza Services Ag Emaillierbare Oxidschicht.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3345059A (en) * 1965-03-12 1967-10-03 United States Steel Corp Crucible for holding molten metal
FR2042857A5 (en) * 1969-04-05 1971-02-12 Ver Deutsche Metallwerke Ag Layer crucibles for induction furnaces
FR2393637A1 (fr) * 1977-06-07 1979-01-05 Daussan & Co Composition pour revetement de repartiteur de coulee, procede pour revetir ce dernier et revetement obtenu
EP0064863A1 (de) * 1981-05-08 1982-11-17 Quigley Company Inc. Monolithische feuerfeste Schicht für metallurgische Gefässe und Anwendungsverfahren

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995025610A1 (fr) * 1994-03-23 1995-09-28 Daussan Et Compagnie Procede et dispositif pour projeter sur une paroi une boue aqueuse pour former un revetement, et revetement ainsi obtenu
FR2717720A1 (fr) * 1994-03-23 1995-09-29 Daussan & Co Revêtement pour protéger l'intérieur d'un récipient métallurgique, dispositif et procédé d'application de ce revêtement.
CN102062540A (zh) * 2010-06-18 2011-05-18 四川龙蟒矿冶有限责任公司 一种复合结构的电炉炉衬
CN102062540B (zh) * 2010-06-18 2013-07-03 四川龙蟒矿冶有限责任公司 一种复合结构的电炉炉衬

Also Published As

Publication number Publication date
ZA865500B (en) 1987-03-25
US4799652A (en) 1989-01-24
CA1266776A (en) 1990-03-20
MY101458A (en) 1991-11-18
FR2585273A1 (fr) 1987-01-30
ES2001336A6 (es) 1988-05-16
EP0214882B1 (de) 1989-02-15
AU6565286A (en) 1988-05-26
EP0214882B2 (de) 1997-09-24
FR2585273B1 (fr) 1988-05-13
ATE40804T1 (de) 1989-03-15
DE3662086D1 (en) 1989-03-23
AU586519B2 (en) 1989-07-13

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