EP0451052A1 - Verbesserte Konstruktion für Brenner und Blasformöffnungen in Öfen und vertikalen Reaktoren - Google Patents

Verbesserte Konstruktion für Brenner und Blasformöffnungen in Öfen und vertikalen Reaktoren Download PDF

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Publication number
EP0451052A1
EP0451052A1 EP91400902A EP91400902A EP0451052A1 EP 0451052 A1 EP0451052 A1 EP 0451052A1 EP 91400902 A EP91400902 A EP 91400902A EP 91400902 A EP91400902 A EP 91400902A EP 0451052 A1 EP0451052 A1 EP 0451052A1
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EP
European Patent Office
Prior art keywords
concrete
refractory
burner
elements
assembly
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
EP91400902A
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English (en)
French (fr)
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EP0451052B1 (de
Inventor
Jacques Schoennahl
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.)
Savoie Refractaires SA
Original Assignee
Savoie Refractaires SA
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Filing date
Publication date
Application filed by Savoie Refractaires SA filed Critical Savoie Refractaires SA
Publication of EP0451052A1 publication Critical patent/EP0451052A1/de
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Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/16—Tuyéres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/10—Details, accessories or equipment specially adapted for furnaces of these types
    • F27B1/16—Arrangements of tuyeres

Definitions

  • the present invention relates to improvements in the production of burner openings or surrounding nozzles of furnaces and vertical reactors.
  • the constituent parts of the surrounds are subject to cracking by thermal shock, to impregnation with potassium vapors which condense in the form of K2O or K2 CO3 and attack the refractory material in depth by making it brittle, and wear by abrasion and erosion caused by the downward load on the material weakened by the previous attacks.
  • the burner openings or the nozzles surrounds are traditionally constituted by the assembly of a large number of refractory, ceramized keys, for example made of silicon carbide with a silicon nitride binder or based on corundum grains with a mullite or sialon binder , of different and relatively complex shapes.
  • the present invention aims to solve the above-mentioned problems by providing burner openings and improved nozzle surrounds for ovens or vertical reactors.
  • the invention relates to a burner flue or a nozzle surround of a vertical furnace or reactor constituted by the assembly of at most four precast elements of molded refractory concrete, characterized in that each element further comprises , a coating bonded to concrete and consisting of ceramic refractory keys of identical shape and dimensions, forming a unitary composite assembly with said element and disposed between the part of the element of molded refractory concrete and the opening intended to receive the burner or the nozzle.
  • the ceramic keyboards constituting the covering can be easily produced by an automatic shaping process, for example by uniaxial pressing.
  • a material based on corundum grains and / or silicon carbide linked by a nitride or sialon binder such as the CORANIT (R) product comprising approximately 75% of alumina and 25% of a nitrided binder of the sialon type and silicon oxynitride; the product SICANIT (R) 20 which comprises approximately 76% of silicon carbide and 25% of a nitrided binder or the product SICANIT (R) AL comprising approximately 9.5% of alumina, 67% of silicon carbide and 23 , 5% of a nitrided binder of the sialon type, which are sold by the applicant.
  • CORANIT (R) product comprising approximately 75% of alumina and 25% of a nitrided binder of the sialon type and silicon oxynitride
  • SICANIT (R) 20 which comprises approximately 76%
  • keyboards can be put in place either at the time of the molding of the concrete part of the elements, by placing the keyboards in the mold used for molding the concrete during the casting of the latter, or after demolding of the concrete part. elements, by jointing by means of a refractory cement, so that the concrete-keyboards association forms a unitary composite assembly.
  • these concretes are formed, by weight, by (A) 70-90% of a refractory aggregate and by (B) 10-30% of a cement consisting of (i) 10-30% of a substance alkaline earth mineral, (ii) 14-54% of ultra-fine particles with a particle size of 100 nm to 0.1 ⁇ m and (iii) 14-54% of fine particles with a particle size of 1 to 10 ⁇ m.
  • vibrated concretes comprising an aggregate formed of alumina with a hydraulic binder such as CRISTARAM (R) concrete with 93% of alumina, the aggregate of which is white corundum quine requires only 3% of 'water and which has a density of 3250 kg / m3 and a resistance to cold crushing greater than 140 MPa; or CORAL (R) concrete with 89% alumina, the aggregate of which is corundum brown, which requires only about 2.5% water and which has a density of 3350 kg / m3 and resistance to cold crushing greater than 50 MPa, both of which are sold by the plaintiff.
  • CRISTARAM R
  • CORAL (R) concrete with 89% alumina the aggregate of which is corundum brown, which requires only about 2.5% water and which has a density of 3350 kg / m3 and resistance to cold crushing greater than 50 MPa, both of which are sold by the plaintiff.
  • Such concretes also have the advantage of being thermally insulating, having a thermal conductivity at 800 ° C of around 4W / mK.
  • materials based on carbon or silicon carbide have a thermal conductivity. more than 15W / mK
  • the molded refractory concrete elements are reinforced by incorporating reinforcing elements, such as stainless steel fibers, into the concrete used.
  • reinforcing elements such as stainless steel fibers
  • An example of commercially available reinforcing stainless steel fibers are the ZP 30/40 SS 304 fibers sold by the company DRAMIX.
  • the addition of steel reinforcing fibers improves resistance to fragmentation by thermal shock, thus avoiding the fragmentation of parts.
  • tests have shown that the resistance to corrosion by carbon monoxide is not affected by the incorporation of steel fibers, as might have been feared.
  • Figures 1 and 2 are schematic sectional and front views, respectively, of a traditional blast furnace nozzle surround.
  • Figures 3 and 4 are schematic sectional and front views, respectively, of a blast furnace nozzle surround according to the invention.
  • Figures 1 and 2 show a conventional surround 1 of nozzle 2 of a blast furnace 3 (shown partially).
  • This entourage which is shown hatched in Figure 1, is formed by the assembly of a large number of ceramic refractory keys 4 of different shapes, the resulting assembly defining an opening or passage 5 adapted to the housing of the frustoconical nozzle 2, the axis of which is slightly inclined downwards.
  • FIGS 3 and 4 show an entourage according to the invention 11.
  • This entourage is formed by the assembly of four prefabricated elements 12.
  • Each element 12 is formed of an outer part 13 of refractory molded concrete (shown in thin shading on the Figure 3), integral with an inner lining 14 defining the opening or passage 5 intended to receive the nozzle 2 of the blast furnace 3 and constituted by the assembly of ceramic refractory keys 15 of identical shape and size, which have a shape corner in their vertical and longitudinal directions.
  • these pins only extend over part of the total thickness of the elements 12, this part including the face of the elements facing the interior of the furnace or reactor. This is interesting from an economic point of view because it makes it possible to reduce the amount of material constituting these pins which is an expensive material.
  • the coverings 14 constitute together an inner ring of frustoconical shape whose axis is slightly inclined downward and which is embedded in the parts 13 of refractory concrete of the elements, the front face 16 of this ring being located on the side of the interior 17 of the top- furnace.
  • the elements 13 are composite concrete-ceramic key elements which exhibit excellent behavior in service.
  • the internal crown in ceramic refractory keys (for example in corundum and / or silicon carbide with nitride or sialon binder) simultaneously exhibits excellent resistance to thermal shock, low thermal conductivity, very high mechanical resistance making it possible to withstand static mechanical stresses exerted on the entire environment, as well as excellent resistance to abrasion and erosion which makes it possible to slow down the wear of the refractory concrete parts which surround it.
  • the molded concrete parts can, for their part, be considered as playing the role of a cradle for holding the keyboards and of a filling material.
  • the assembly of the elements 12 can be done by simple juxtaposition of said elements, with or without jointing using a refractory cement or mortar.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Compositions Of Oxide Ceramics (AREA)
EP91400902A 1990-04-06 1991-04-03 Verbesserte Konstruktion für Brenner und Blasformöffnungen in Öfen und vertikalen Reaktoren Expired - Lifetime EP0451052B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9004452A FR2660742B1 (fr) 1990-04-06 1990-04-06 Perfectionnements a la realisation des ouvreaux de bruleurs ou entourages de tuyeres de fours de reacteurs verticaux.
FR9004452 1990-04-06

Publications (2)

Publication Number Publication Date
EP0451052A1 true EP0451052A1 (de) 1991-10-09
EP0451052B1 EP0451052B1 (de) 1995-09-27

Family

ID=9395521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400902A Expired - Lifetime EP0451052B1 (de) 1990-04-06 1991-04-03 Verbesserte Konstruktion für Brenner und Blasformöffnungen in Öfen und vertikalen Reaktoren

Country Status (5)

Country Link
US (1) US5178819A (de)
EP (1) EP0451052B1 (de)
DE (1) DE69113307T2 (de)
ES (1) ES2080267T3 (de)
FR (1) FR2660742B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592792A1 (de) * 1992-10-16 1994-04-20 MAN Gutehoffnungshütte Aktiengesellschaft Windformhalterung im Schachtofenpanzer

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5295669A (en) * 1992-10-26 1994-03-22 Caldo International, Inc. Refractory coated iron-based pipe
DE29518283U1 (de) * 1995-11-17 1996-01-04 Agrichema Materialflußtechnik GmbH, 55257 Budenheim Heißbranddüse mit Wechselrohr
DE10108579A1 (de) * 2001-02-22 2002-09-12 Rhi Ag Wien Feuerfester keramischer Körper und zugehöriges metallurgisches Schmelzgefäß
KR100805614B1 (ko) * 2001-12-19 2008-02-20 주식회사 포스코 고로 풍구주변의 내화물 축조방법
DE102018112927A1 (de) * 2018-05-30 2019-12-05 Rheinzink Gmbh & Co. Kg Verfahren für Induktorzustellung
JP7267330B2 (ja) * 2021-02-18 2023-05-01 マフテック株式会社 リジェネバーナ用耐火物ユニット及びその製造方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1401132A (fr) * 1964-07-21 1965-05-28 Morganite Carbon Ltd Brique réfractaire
GB1044760A (en) * 1963-12-10 1966-10-05 Cullinan Refractories Ltd Improvements in or relating to composite refractory lining units
US3589318A (en) * 1969-07-31 1971-06-29 Edwin J Szatkowski Blast furnace tuyere openings
US4172107A (en) * 1975-11-10 1979-10-23 Tokyo Shibaura Electric Co., Ltd. Method of manufacturing composite ceramic articles
DE2854998B1 (de) * 1978-12-20 1980-04-03 Thyssen Huette Ag Verwendung von feuerfestem Beton fuer Hochofen-Auskleidungen
DE3736914A1 (de) * 1986-10-31 1988-05-05 Shinetsu Chemical Co Verfahren zur herstellung von organischen silazanpolymeren und daraus gebildeten keramikmaterialien
DE8910674U1 (de) * 1989-09-07 1989-10-19 Carborundum Resistant Materials GmbH, 4000 Düsseldorf Wärmedämmplatte

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57200506A (en) * 1981-06-05 1982-12-08 Toshiba Ceramics Co Ltd Large sized tuyere brick for shaft furnace
JPS5989709A (ja) * 1982-11-12 1984-05-24 Tokyo Yogyo Co Ltd Ｒｈ下部槽内張構造

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1044760A (en) * 1963-12-10 1966-10-05 Cullinan Refractories Ltd Improvements in or relating to composite refractory lining units
FR1401132A (fr) * 1964-07-21 1965-05-28 Morganite Carbon Ltd Brique réfractaire
US3589318A (en) * 1969-07-31 1971-06-29 Edwin J Szatkowski Blast furnace tuyere openings
US4172107A (en) * 1975-11-10 1979-10-23 Tokyo Shibaura Electric Co., Ltd. Method of manufacturing composite ceramic articles
DE2854998B1 (de) * 1978-12-20 1980-04-03 Thyssen Huette Ag Verwendung von feuerfestem Beton fuer Hochofen-Auskleidungen
DE3736914A1 (de) * 1986-10-31 1988-05-05 Shinetsu Chemical Co Verfahren zur herstellung von organischen silazanpolymeren und daraus gebildeten keramikmaterialien
DE8910674U1 (de) * 1989-09-07 1989-10-19 Carborundum Resistant Materials GmbH, 4000 Düsseldorf Wärmedämmplatte

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 53 (C-154)[1198], 3 mars 1983; & JP-A-57 200 506 (TOSHIBA CERAMICS) 08-12-1982 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0592792A1 (de) * 1992-10-16 1994-04-20 MAN Gutehoffnungshütte Aktiengesellschaft Windformhalterung im Schachtofenpanzer

Also Published As

Publication number Publication date
DE69113307D1 (de) 1995-11-02
EP0451052B1 (de) 1995-09-27
FR2660742B1 (fr) 1995-05-05
US5178819A (en) 1993-01-12
DE69113307T2 (de) 1996-03-21
FR2660742A1 (fr) 1991-10-11
ES2080267T3 (es) 1996-02-01

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