WO2013014257A1 - Briques de haut fourneau pourvues d'un revêtement - Google Patents

Briques de haut fourneau pourvues d'un revêtement Download PDF

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Publication number
WO2013014257A1
WO2013014257A1 PCT/EP2012/064747 EP2012064747W WO2013014257A1 WO 2013014257 A1 WO2013014257 A1 WO 2013014257A1 EP 2012064747 W EP2012064747 W EP 2012064747W WO 2013014257 A1 WO2013014257 A1 WO 2013014257A1
Authority
WO
WIPO (PCT)
Prior art keywords
carbon
furnace
coating
carbon brick
ceramic
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.)
Ceased
Application number
PCT/EP2012/064747
Other languages
German (de)
English (en)
Inventor
Janusz Tomala
Christian Wiebel
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.)
SGL Carbon SE
Original Assignee
SGL Carbon SE
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 SGL Carbon SE filed Critical SGL Carbon SE
Publication of WO2013014257A1 publication Critical patent/WO2013014257A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
    • C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
    • C23C8/24—Nitriding
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/52—Multiple coating or impregnating multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/89—Coating or impregnation for obtaining at least two superposed coatings having different compositions
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/04—Blast furnaces with special refractories
    • C21B7/06—Linings for furnaces
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
    • C23C28/04—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material
    • C23C28/042—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings of inorganic non-metallic material including a refractory ceramic layer, e.g. refractory metal oxides, ZrO2, rare earth oxides
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • 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
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/16—Making or repairing linings ; Increasing the durability of linings; Breaking away linings
    • F27D1/1621—Making linings by using shaped elements, e.g. bricks
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications
    • C04B2111/00887—Ferrous metallurgy
    • 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
    • C21C5/44—Refractory linings

Definitions

  • the present invention relates to a carbon brick for the inner lining of melting and reduction furnaces, a melting and reducing furnace containing such a carbon brick and a method for producing such a carbon brick.
  • these melting and reduction furnaces blast furnaces for the production of pig iron.
  • melting and reduction furnaces designed as blast furnaces several superimposed zones, wherein in the so-called melting zone, prevail in the temperatures in the range of about 1600 ° C, the molten pig iron and slag is.
  • Inner linings of smelting and reduction furnaces are often made in the region of the melting zone of carbon stones, which are usually constructed essentially of amorphous and / or graphitic carbon material and / or graphite.
  • the carbon stones in contact with the molten metal, eg pig iron, and the slag are subject to high chemical and mechanical wear, for example, caused by the solubility of the carbon in carbon-unsaturated pig iron, the penetration of metal, for example, pig iron into the pore system of Carbon stones, which causes cracks in the stones, by movement of the molten metal, for example, pig iron, and the slag and by reaction of the carbon with slag constituents and / or alkalis.
  • the above-mentioned wear mechanisms significantly reduce the life of carbon bricks in melting and reduction furnaces. For example, in order to be economical, melting and reduction furnaces designed as blast furnaces should be able to operate for 15 years or more without major repairs.
  • the solutions proposed in the past have not led to a satisfactory increase in the life of carbon stones for the inner lining of melting and reduction furnaces and were often also expensive to produce.
  • the object of the present invention is therefore to propose a carbon brick for the inner lining of melting and reduction furnaces, which has an increased wear resistance.
  • the object of the invention is also to propose a melting and reduction furnace with extended life.
  • the idea of the invention is to increase the wear resistance of carbon bricks to the inner lining of melting and reduction furnaces in a reliable and cost-effective manner by applying to the surface of the base body in the region containing the molten metal, in particular pig iron, and / or to provide the slag with the process side in contact, a protective coating comprising a wear reducing ceramic topcoat is applied.
  • a coating is to be understood in this patent application at least one layer which is formed by applying a formless material on a substrate and firmly connected to the substrate.
  • amorphous carbon is understood as meaning a carbon material which contains anthracite and / or coke and not more than 70% by weight of graphite and which was exposed in its entirety to a temperature of 2000 ° C. or less.
  • graphitic carbon is understood as meaning a carbon material which contains more than 70% by weight of graphite and which was exposed in its entirety to a temperature of 2000 ° C. or less.
  • graphite is understood as meaning synthetic graphite or natural graphite or a mixture thereof.
  • melting and reduction furnaces which may be included in the invention. These may be, for example, melting and reduction furnaces for the production of ferroalloys, such as ferro-silicon, ferro-manganese, ferro-chromium, ferro-nickel,
  • the protective coating additionally comprises an intermediate coating arranged between the surface of the main body and the topcoat, which in the temperature range from 20 ° C to at least 1600 ° C has a thermal expansion, which lies between the thermal expansion of the body and the ceramic topcoat.
  • the formation of cracks in the protective coating and the resulting flaking of the protective coating can be reduced, if not prevented, since high thermal stresses in the cover coating which comes into contact with the metal, for example pig iron, are reduced or even prevented.
  • a main body constructed essentially of carbon material generally has a lower thermal expansion in the temperature range from 20 ° C. to at least 1600 ° C. than a ceramic material suitable for the top coat, which is resistant to mechanical and chemical wear by molten metal, in particular pig iron, and / or slag can withstand carbon materials at 1000 ° C, for example, have a thermal expansion coefficient of about 3xl0 6 / K whereas, for example, alumina at this temperature has a coefficient of thermal expansion of about 8.5xl0 6 / K, can in a protective coating without intermediate coating in operation, high thermal stresses occur, which can lead to cracking in the top coat and thus to their premature failure.
  • the intermediate coating serves as a buffer between the divergent thermal expansion behavior of carbon body and topcoat.
  • the topcoat is preferably selected so that it fulfills at least one, preferably several and particularly preferably all of the following functions with respect to a carbon block which, apart from the absence of the protective coating, is constructed identically to the carbonstone according to the invention: higher resistance to liquid metal, in particular pig iron, higher resistance to alkalis, higher stability against oxidizing atmosphere, higher resistance to mechanical wear
  • the intermediate coating is preferably selected such that, in addition to its thermal expansion in the temperature range from 20 ° C. to at least 1600 ° C. between that of the main body and that of the topcoat, it comprises at least one, preferably several and most preferably all of the following functions fulfilled: good connection to the surface of the main body good connection to the top coating permanent applicability at temperatures up to at least 1600 ° C, ie, for example, no structural changes, no phase transitions
  • a further particularly preferred embodiment of the invention provides that the protective coating is formed only of the intermediate coating and the top coat, i.
  • the protective coating comprises no further coatings than the intermediate coating and the topcoat.
  • the carbon brick has the protective coating only in the region of its surface which provides the process side.
  • the carbon brick is provided in addition to the process side on the opposite side of the process side of its surface with the protective coating. This is particularly useful when the carbon stone is arranged in the region of the tap hole of the furnace formed as a blast furnace and reduction, since in this area liquid pig iron is tapped and from the interior of the furnace to the outside, the so-called. Cold side occurs. As a result, the cold side of the furnace comes into contact with the molten pig iron and is thus subjected to high wear. By providing the coating of the carbon brick both on its process side and on its side providing the outside of the furnace, the wear previously described can thus be reduced.
  • the carbon brick comprises a tap hole
  • another preferred embodiment of the invention provides that the interior of the tap hole itself has the protective coating already described.
  • the intermediate coating is formed by one or more intermediate layers.
  • the ceramic cover coating is formed by a single or by a plurality of ceramic cover layers.
  • various combinations are possible.
  • both the top coat and the intermediate coat are each formed of only a single coat.
  • the intermediate coating of a single layer and the top coat are formed of several layers.
  • the top coat is formed of a single layer and the intermediate coat of multiple layers.
  • both the top coat and the intermediate coat are each formed from several layers.
  • the ceramic topcoat may include or be formed from one or more oxidic or carbidic or more carbidic or boridic or more boridic or nitricidal or more nitridic ceramic materials or mixtures thereof.
  • the intermediate coating may be one or more metals or one oxide or more oxide or one carbide or more carbidic or one boridic or more boridic or one nitridic or more nitridic Ceramic material (s) or mixtures thereof contain or be formed from it.
  • a cover layer of the top coat consists of a mixture of the above-mentioned materials as it is also possible, for example.
  • the top coat is composed of several cover layers is possible that a cover layer of the top coat only one of the consists of the above materials and another cover layer of the top coat of another of the above materials or of several of the above materials.
  • the intermediate coating in which both an intermediate layer of only one or more of the above materials may be formed or may contain these materials, as it is also possible that an intermediate layer consists of only one material whereas another intermediate layer consists of several of the above-mentioned materials. Furthermore, it can be provided that the intermediate coating is formed from a single or a plurality of metals.
  • At least one intermediate layer is formed from a single material and / or at least one cover layer is formed from a single material.
  • the intermediate coating and the top coat provides, for example, that the intermediate coating of a single layer of molybdenum and the top coating of a single layer of alumina are formed. It is also conceivable in this connection that the intermediate coating consists of a single layer of aluminum nitride and the top coating of a single layer Titanium carbide are formed. Further, it is also possible, for example, for the intermediate coating to consist of a single layer of tungsten carbide and the topcoat of a single layer of titanium diboride.
  • the topcoat has a thickness in the range of 50 ⁇ to 1500 ⁇ , preferably 100 ⁇ to 1000 ⁇ , more preferably 400 ⁇ to 700 ⁇ .
  • a thickness in the range of 50 ⁇ to 1500 ⁇ preferably 100 ⁇ to 1000 ⁇ , more preferably 400 ⁇ to 700 ⁇ .
  • the intermediate coating has a layer thickness in the range of 10 ⁇ to 600 ⁇ .
  • the individual intermediate layers can each have a layer thickness in the range of 10 ⁇ to 200 ⁇ .
  • the carbon material of the main body preferably contains or is preferably formed from, amorphous carbon such as anthracite and / or coke, graphitic carbon, synthetic graphite, natural graphite or a composition of several of the aforementioned materials.
  • the material composition of the base body may contain one or more ceramic constituents, the proportion of all ceramic constituents being lower in the material composition than the proportion of the carbon material.
  • the material composition preferably contains more than 60% by weight of the carbon material.
  • ceramic constituents for example, one or more oxidic (s), a or a plurality of carbidic, one or more nitridic, one or more boridic ceramic material (s), or mixtures of several of the foregoing materials.
  • a melting and reducing furnace in particular a blast furnace, designed as a shaft furnace, having a melting zone in which molten metal, in particular pig iron, and / or slag is present during operation of the furnace.
  • the shaft furnace has an inner furnace lining, which is in contact with the molten metal, in particular pig iron, and / or the slag during operation of the furnace in the region of the melting zone.
  • the inner furnace lining at least in the region of the melting zone contains at least one carbon block according to the invention, which points with its process side into the interior of the shaft furnace.
  • a preferred embodiment of the invention provides that in the region of the at least one taphole at least one further inventive carbon stone is provided with its process side at least partially the outside or cold side of the furnace in the Provides the tap hole area.
  • the furnace therefore has a plurality of carbon stones according to the invention, of which at least one with its coated process side, the inside of the furnace and at least another with its coated process side provides the outside of the oven.
  • At least one carbon brick in addition to the coating on the process side, at least partially on the process side opposite cold side of its surface has a protective coating and that the at least one carbon stone in the tap hole is arranged so that the coated process side into the interior of the furnace and is in contact with the molten pig iron and the coated cold side provides part of the outside of the furnace in the region of the tap hole.
  • the protective coating forming part of the outside of the furnace is constructed the same as the protective coating of the carbon brick of the process side.
  • a method for producing a carbon brick for the inner lining of melting and reducing furnaces comprising the following steps:
  • the shaping can be done for example by vibration compression (vibromolding) or extrusion.
  • the firing of the green body can be carried out at temperatures in the range of about 800 ° C to 1300 ° C.
  • the metallic additives may be, for example, silicon (Si), titanium (Ti) or zirconium (Zr), which are at least partially converted into a ceramic material in the subsequent firing and / or graphitization process.
  • the ceramic additives may, for example, be silicon carbide (SiC), titanium dioxide (T1O2) or aluminum oxide (Al2O3) or aluminum silicates.
  • the protective coating is applied by first applying an intermediate coating to at least one area of the roughened surface and subsequently applying a topcoat to at least one area of the intermediate coating.
  • the surface to be coated of the carbon body obtained after the firing process and the mechanical processing can be roughened by sand blasting, for example.
  • Methods for applying the intermediate layer and the cover layer may be, for example, methods such as plasma spraying, flame spraying, chemical vapor deposition (CVD), physical vapor deposition (PVD) or the like.
  • CVD chemical vapor deposition
  • PVD physical vapor deposition
  • a suspension is provided for the production of the ceramic topcoat and / or the intermediate coating, which is applied, for example, by a coating, spraying or dipping process on the area of the surface of the base body to be coated and below for the conversion of the suspension in the topcoat or the intermediate coating is subjected to a temperature treatment.
  • the suspension may in this case, for example, contain a polymeric liquid and ceramic particles.
  • Figure 1 shows an embodiment of an inventive
  • Figure 2 shows a reduction and melting furnace according to the invention in
  • FIG. 1 shows a carbon brick 1 for the inner lining of melting and reduction furnaces.
  • the shown carbon brick 1 has a surface 2, which provides a process side 3 of the carbon brick 1 on a section.
  • the process side 3 is brought into contact with molten metal, in particular pig iron, and / or slag.
  • the illustrated carbon brick 1 has a base body 4 containing a carbon material with a surface 5 on which a protective coating 6 is applied in an area 5 ' for providing the process side 3.
  • the protective coating 6 shown in the present embodiment is characterized by a wear-reducing ceramic top coat 7 and a between the surface 5 of the base body 4 and the top coat 7 arranged intermediate coating 8 is formed.
  • the intermediate coating 8 as well as the ceramic top coating 7 are each formed by a single layer, wherein the intermediate layer 8 forming intermediate layer of the metal molybdenum and the cover layer 7 forming cover layer of the ceramic is alumina.
  • the intermediate coating 8 and the top coat 7 are adjusted so that in the temperature range of 20 to at least 1600 ° C, the thermal expansion of the intermediate coating 8 is greater than the thermal expansion of the base body 4 and smaller than the extent of the ceramic top coat. 7
  • the intermediate coating 8 is applied directly to the surface 5 of the main body 2 and the ceramic top coating 7 is applied directly to the intermediate coating 8.
  • the top coat 7 of the present embodiment has a thickness of about 500 ⁇ and the thickness of the intermediate coating 8 is about 100 ⁇ .
  • the base body 4 is produced from a mixture which contains about 40% by weight of anthracite, about 40% by weight of graphite, about 10% by weight of silicon and about 10% by weight of aluminum oxide in the dry mixture , wherein the green body produced therefrom was burned at about 1200 ° C for the production of the carbon body.
  • the carbon brick is provided with the protective coating 6 only in that section of its surface 2 which provides the process side 3.
  • 2 shows a reduction and smelting furnace 9 according to the invention, which is designed in the present embodiment as a blast furnace in shaft construction.
  • a blast furnace pig iron is obtained by reduction from iron ores, which serves as an energy source and reducing agent predominantly coke and the slag formation and lowering of the melting temperature various additives such as quartz sand, lime are buried.
  • the blast furnace 9 has in its lower part a designated as a stop 10 and as a frame 1 1 section, which in the present case surrounding the molten zone 12 of the blast furnace 9.
  • molten zone 12 is in operation molten pig iron and slag.
  • a temperature in the range of about 1600 ° C. prevails in the molten zone 12.
  • hot air is blown through so-called wind nozzles 13 in the molten zone 12, which are supplied via a loop 14.
  • the slag is passed through a tap hole 15 and the pig iron is fed out of the molten zone 12 via a tap hole 16.
  • the entire molten zone 12 is enclosing interior lining, i. the directed into the furnace interior side at least partially, preferably completely constructed of the carbon bricks 1 according to the invention.
  • the external wall forming the outside of the blast furnace 9 is formed at least in sections by carbon blocks 1 according to the invention, which with their process side 3 provide the outside of the blast furnace in the region of the tap holes 15 and 16.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Structural Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Blast Furnaces (AREA)

Abstract

L'invention concerne une brique de carbone destiné au garnissage, notamment au garnissage intérieur, de fourneaux de fusion et de réduction, s'agissant notamment de hauts fourneaux, une zone de la surface de ladite brique de carbone constituant son côté procédé lequel est mis en contact avec du métal liquide, notamment avec du fer liquide de première fusion, et/ou avec du laitier lorsque la brique de carbone est mise en œuvre selon l'invention, et la brique de carbone ayant un corps de base qui contient un matériau carboné et qui comporte une surface. L'invention est caractérisée en ce qu'un revêtement protecteur, lequel comprend un revêtement céramique de couverture qui réduit l'usure ou lequel en est constitué, est appliqué sur au moins une zone de ladite surface afin de fournir ledit côté procédé de la brique de carbone.
PCT/EP2012/064747 2011-07-28 2012-07-26 Briques de haut fourneau pourvues d'un revêtement Ceased WO2013014257A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011079967.2 2011-07-28
DE201110079967 DE102011079967A1 (de) 2011-07-28 2011-07-28 Beschichtete Hochofensteine

Publications (1)

Publication Number Publication Date
WO2013014257A1 true WO2013014257A1 (fr) 2013-01-31

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DE (1) DE102011079967A1 (fr)
TW (1) TW201321334A (fr)
WO (1) WO2013014257A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111427388A (zh) * 2020-04-16 2020-07-17 中冶赛迪工程技术股份有限公司 一种高炉炉缸凝铁层控制系统及方法

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