WO1994014727A1 - Refractory compositions - Google Patents

Refractory compositions Download PDF

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Publication number
WO1994014727A1
WO1994014727A1 PCT/GB1993/002451 GB9302451W WO9414727A1 WO 1994014727 A1 WO1994014727 A1 WO 1994014727A1 GB 9302451 W GB9302451 W GB 9302451W WO 9414727 A1 WO9414727 A1 WO 9414727A1
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WO
WIPO (PCT)
Prior art keywords
refractory
inorganic binder
composition according
aluminium
weight
Prior art date
Application number
PCT/GB1993/002451
Other languages
English (en)
French (fr)
Inventor
Gerd Trinkl
Manfred Fessel
Vincent Edward Mellows
Reinhard Stötzel
Original Assignee
Foseco International Limited
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 Foseco International Limited filed Critical Foseco International Limited
Priority to EP94900937A priority Critical patent/EP0675862B1/en
Priority to BR9307724-6A priority patent/BR9307724A/pt
Priority to CA002147247A priority patent/CA2147247C/en
Priority to AU55707/94A priority patent/AU669769B2/en
Priority to AT94900937T priority patent/ATE150435T1/de
Priority to KR1019950702513A priority patent/KR100241129B1/ko
Priority to JP6514899A priority patent/JPH08507282A/ja
Priority to DE69309105T priority patent/DE69309105T2/de
Priority to US08/411,790 priority patent/US6284688B1/en
Publication of WO1994014727A1 publication Critical patent/WO1994014727A1/en

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    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/628Coating the powders or the macroscopic reinforcing agents
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    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66Monolithic refractories or refractory mortars, including those whether or not containing clay
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22DCASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D41/00Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
    • B22D41/02Linings
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    • C04B22/00Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators or shrinkage compensating agents
    • C04B22/0066Compounds chosen for their high crystalwater content
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    • C04B33/13Compounding ingredients
    • C04B33/132Waste materials; Refuse; Residues
    • C04B33/135Combustion residues, e.g. fly ash, incineration waste
    • C04B33/1352Fuel ashes, e.g. fly ash
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    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303Inorganic additives
    • C04B35/6306Binders based on phosphoric acids or phosphates
    • C04B35/6313Alkali metal or alkaline earth metal phosphates
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    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64Burning or sintering processes
    • C04B35/65Reaction sintering of free metal- or free silicon-containing compositions
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00Casings; Linings; Walls; Roofs
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    • F27D1/0006Linings or walls formed from bricks or layers with a particular composition or specific characteristics
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    • C04B2111/00431Refractory materials
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    • C04B2235/30Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3205Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
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    • C04B2235/32Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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    • C04B2235/34Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Definitions

  • This invention relates to refractory compositions which are used in their dry state to produce refractory articles, for example linings for furnaces or metallurgical vessels such as ladles, tundishes or launders.
  • Refractory products whether they be pre-formed articles for a particular application or linings for furnaces or metallurgical vessels are usually produced by methods, such as ramming, trowelling, spraying or casting, using wet refractory compositions in the form of an aqueous slurry or a moiildable or castable mass.
  • Such methods have disadvantages in that they are time consuming since apart from the initial application or forming process they require a drying step and often additional calcining or sintering steps. It is also necessary to maintain the composition-in a suitable condition for application and this can be a problem because the solid materials tend to settle.
  • Some of the methods, for example, spraying require relatively complex equipment which in use can become blocked, and all the wet methods require an on-site supply of water for producing the compositions in a form suitable for application.
  • European Patent Application Publication No. 0064863 describes a method of applying a monolithic refractory layer within a metallurgical vessel using a substantially dry particuiate mixture comprising at least 70% by weight of refractory aggregate, at least 0.5% by weight of thermosetting resin, from about 0.5% to 10% by weight of an inorganic binder and optionally from about 0.5% to 10% of an inorganic hydrate.
  • International Patent Application Publication No. WO 92/09542 describes a thermally activated, dry refractory composition which is used for the production of a new refractory lining or the repair of an existing refractory lining in a furnace or other high-temperature vessel.
  • the composition may consist of from about 35% to about 85% by weight of a refractory aggregate and from about 15% to about 50% by weight of a hydrated material containing from about 5 to about 9 moles of chemically bound water in crystalline form, the water constituting from about 7% to about 35% by weight of the total composition.
  • the hydrated material is present in a sufficient amount, with respect to the amount of chemically bound water contained therein, to provide moisture to the composition to cause self-flowability of the composition when the composition is applied to a hot surface to be lined or repaired.
  • a substantially dry, self-hardening, thermally activated refractory composition comprising a particuiate refractory material, an inorganic binder having associated therewith chemically or physically bound water, and an element or compound which will react exothermically with the inorganic binder.
  • the particuiate refractory material which preferably constitutes from about 70% to about 95% by weight of the composition, may be for example, silica, zircon, silicon carbide, alumina (corundum), magnesia (calcined magnesite), calcined dolomite, chrome magnesite, olivine, forsterite, mullite, kyanite, andalusite, chamotte, carbon or chromite, or a mixture of two or more of those materials.
  • the composition may also contain low density particuiate refractory materials such as expanded perlite, expanded vermiculite, diatomaceous earth or fly ash floaters in order to reduce the density of the cured composition if desired.
  • low density particuiate refractory materials such as expanded perlite, expanded vermiculite, diatomaceous earth or fly ash floaters in order to reduce the density of the cured composition if desired.
  • Suitable inorganic binders having chemically bound water associated therewith are crystalline hydrated salts such as silicates, carbonates, sulphates, nitrates, borates or phosphates.
  • These salts include sodium__metasilicate pentahydrate, sodium metasilicate nonahydrate, aluminum sulphate octadecahydrate, magnesium sulphate heptahydrate, sodium tetraborate decahydrate, magnesium carbonate trihydrate, magnesium nitrate hexahydrate, aluminium potassium sulphate dodecahydrate aluminium sodium sulphate dodecahydrate and tribasic sodium phosphate dodecahydrate.
  • Sodium silicate pertahydrate and tribasic sodium phosphate dodecahydrate are preferred.
  • suitable inorganic binders having physically bound water associated therewith are micro-encapsulated sodium silicate solution (waterglass) and micro-encapsulated aqueous aluminium orthophosphate solution.
  • the inorganic binder (including the chemically or physically bound water) will constitute from about 1% to about 15% by weight of the refractory composition.
  • the element or compound which will react exothermically with the inorganic binder may be for example ferrosilicon, calcium oxide, magnesium oxide, aluminium or cement, and will usually constitute from about 1% to about 15% by weight of the refractory composition. Aluminium is preferred and can be used as a powder or as small particles of foil.
  • the composition an inhibitor for example a mineral or vegetable oil.
  • the inhibitor will usually constitute from about 0.1% to about 5% by weight of the refractory composition.
  • the substantially dry refractory compositions of the invention may be prepared by thoroughly mixing together the individual components.
  • compositions may be used to produce refractory articles by various means, for example by filling a suitable mould, or in the case of the production of a lining in a metallurgical vessel by filling the space between the surface to be lined and a suitable former with the composition, and then locally heating the composition to initiate a hardening reaction between the inorganic binder and the element or compound which reacts exothermically with the binder.
  • Local heating of the composition may be achieved by using a mould, former or vessel which is at least partly heated or by applying heat to a portion of the composition, for example by means of a gas torch.
  • the refractory compositions of the invention are substantially dry flowable powders which may be readily used for a variety of applications, and in particular for producing facing or backing linings for furnaces or for metallurgical vessels such as ladles, tundishes, launders or pot cells used in the smelting of aluminium, and for producing refractory shapes.
  • the compositions have a relatively short curing time so that shapes, linings etc. are ready for use relatively quickly, and they can be formulated so as to produce light-weight, highly heat-insulating articles.
  • a substantially dry, self-hardening thermally activated refractory composition was prepared by mixing together the following components in the proportions indicated :-
  • the composition was used to produce cylinders 50 mm in diameter and .50 mm in height by ramming the composition into cardboard tubes and curing by applying a bunsen burner flame on top of the rammed composition. The cured cylinders were stripped from the cardboard tubes after 10 minutes.
  • the compression strength of some of the cylinders was measured at room temperature, and other cylinders were heated up to 1500°C at a rate of 400°C per hour and then cooled to room temperature at the same rate and their compression strength determined. The measurements were done on a hydraulic press fitted with a gauge giving valves in kp.
  • the permeability of the cylinders was determined using a GF permeability tester of the type used for determining the permeability of foundry sand test cores.
  • the density of cylinders was determined both before and after heating to 1500°C, and the volume expansion resulting from the heating to 1500°C was also measured.
  • Example 2 A composition similar to that of Example 1 was prepared by mixing the following components in the proportions indicated :-
  • Example 2 The composition was used and tested as described in Example 1 except that compression strengths were also determined on cylinders which had been heated to 500°C, 700°C, 1000°C and 1200°C respectively and then cooled. The average results obtained are listed below: -
  • a substantially dry, self-hardening, thermally activated refractory composition for use as a metal casting ladle lining was prepared by mixing together the following compositions, A and B, in a weight ratio of 1: 1 for 15 minutes in a concrete mixer:
  • the compression strength of the lining material was determined using the procedure described in Example 1 immediately after stripping, after heating to 1000°C and after heating to 1500°C.
  • a typical refractory concrete of the type used to line ladles has the rate of heat loss of the order of 0.8 cal/cm ⁇ .s and a heat loss after 1 hour of 4000 cal/cm-2 when measured using the same equipment.
  • Example 2 Some of the composition was tested as described in Example 1 so as to determine its cured room temperature compression strength and density.
  • the cured composition had a compression strength of 61 N/cm-2 and a density of 0.9 g/cm 3 .
  • a gas torch was then applied to the outside of the base of the ladle so as to trigger an exothermic reaction in the backing composition. After about 45 minutes the reaction had progressed throughout the whole of the backing and the composition had fully cured, and the lined ladle was then used for holding molten aluminium.
  • Example 4 A composition identical to that described in Example 4 except that it contained tribasic sodium phosphate dodecahydrate instead of sodium metasilicate pentahydrate was prepared and tested.
  • the cured composition had a compression strength of 186 N/cm2 and a density of 0.86 g/cm 3 .

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  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Ceramic Products (AREA)
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  • Fireproofing Substances (AREA)
  • Paints Or Removers (AREA)
  • Lubricants (AREA)
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PCT/GB1993/002451 1992-12-22 1993-11-29 Refractory compositions WO1994014727A1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP94900937A EP0675862B1 (en) 1992-12-22 1993-11-29 Refractory compositions
BR9307724-6A BR9307724A (pt) 1992-12-22 1993-11-29 Composição refratária
CA002147247A CA2147247C (en) 1992-12-22 1993-11-29 Refractory compositions
AU55707/94A AU669769B2 (en) 1992-12-22 1993-11-29 Refractory compositions
AT94900937T ATE150435T1 (de) 1992-12-22 1993-11-29 Feuerfeste zusammensetzungen
KR1019950702513A KR100241129B1 (ko) 1992-12-22 1993-11-29 내화물 조성물
JP6514899A JPH08507282A (ja) 1992-12-22 1993-11-29 耐火材組成物
DE69309105T DE69309105T2 (de) 1992-12-22 1993-11-29 Feuerfeste zusammensetzungen
US08/411,790 US6284688B1 (en) 1992-12-22 1993-11-29 Refractory compositions

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GB9226662A GB9226662D0 (en) 1992-12-22 1992-12-22 Refractory compositions

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EP0814134A3 (en) * 1996-06-19 1998-04-01 Bet-Ker Oy Coating composition and process for its application
WO2000001639A1 (en) * 1998-07-01 2000-01-13 Foseco International Limited Refractory compositions
WO2003104164A1 (en) * 2002-06-10 2003-12-18 The Welding Institute Heat resistant product
WO2008060160A1 (en) * 2006-11-17 2008-05-22 Elkem As Refractory dry powder for ladle and furnace linings for metallurgical vessels
WO2008060161A1 (en) * 2006-11-13 2008-05-22 Elkem As Refractory compositions
WO2009010311A1 (de) * 2007-07-14 2009-01-22 Refractory Intellectual Property Gmbh & Co. Kg Ungeformter feuerfester werkstoff, ein verfahren zur erstellung eines erdfeuchten ungeformten feuerfesten werkstoffs sowie eine verwendung des ungeformten feuerfesten werkstoffs
CN107382292A (zh) * 2017-08-15 2017-11-24 贵州大学 一种环保型绿色茶具

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US6416572B1 (en) * 1999-12-02 2002-07-09 Foseco International Limited Binder compositions for bonding particulate material
JP2004262727A (ja) * 2003-03-04 2004-09-24 Ryu Meiso 軽質陶磁器の製造法
US7083758B2 (en) * 2003-11-28 2006-08-01 Les Produits Industriels De Haute Temperature Pyrotek Inc. Free flowing dry back-up insulating material
NO325204B1 (no) * 2005-02-03 2008-02-25 Elkem As Torr eksoterm sammensetning for fremstilling av ildfaste produkter
CN1321944C (zh) * 2005-12-23 2007-06-20 郑州豫兴耐火材料有限公司 泥浆结合的抗热震耐火砖及其生产方法
TWI421227B (zh) * 2006-07-06 2014-01-01 Vesuvius Crucible Co 無水泥耐火物
US8618006B2 (en) 2006-07-06 2013-12-31 Vesuvius Crucible Company Cement-free refractory
CH699405B1 (de) * 2008-08-26 2021-06-15 Mokesys Ag Feuerfeste Wand, insbesondere für einen Verbrennungsofen.
CN101462887B (zh) * 2009-01-08 2012-07-18 武汉科技大学 一种干式镁钙质自流耐火材料及其制备方法
PL2251443T3 (pl) 2009-05-06 2012-03-30 Foseco Int Kadź obróbcza
JP5692216B2 (ja) 2010-03-11 2015-04-01 三菱化学株式会社 シリコンの製造方法および治具
WO2011163587A1 (en) * 2010-06-25 2011-12-29 Board Of Governors For Higher Education,State Of Rhode Island And Providence Plantations Self-mending composites incorporating encapsulated mending agents
JP5738096B2 (ja) * 2011-06-30 2015-06-17 前島 福夫 飲料容器
DE102013004101B4 (de) * 2013-03-11 2014-12-24 SICcast Mineralguß GmbH & Co. KG Zusammensetzung, Verfahren zur Herstellung eines Verbundwerkstoffs, Verwendung der Zusammensetzung sowie Verbundwerkstoff
US11958103B2 (en) 2018-07-09 2024-04-16 Kao Corporation Inorganic coated sand
KR20220117333A (ko) 2019-12-24 2022-08-23 럿거스, 더 스테이트 유니버시티 오브 뉴 저지 주조 요소, 및 저온 응고를 이용한 상기 주조 요소의 제조 방법
CN113732273B (zh) * 2021-09-10 2022-12-06 东营嘉扬精密金属有限公司 一种环保型冒口保温剂及其制备方法

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0814134A3 (en) * 1996-06-19 1998-04-01 Bet-Ker Oy Coating composition and process for its application
WO2000001639A1 (en) * 1998-07-01 2000-01-13 Foseco International Limited Refractory compositions
WO2003104164A1 (en) * 2002-06-10 2003-12-18 The Welding Institute Heat resistant product
WO2008060161A1 (en) * 2006-11-13 2008-05-22 Elkem As Refractory compositions
WO2008060160A1 (en) * 2006-11-17 2008-05-22 Elkem As Refractory dry powder for ladle and furnace linings for metallurgical vessels
WO2009010311A1 (de) * 2007-07-14 2009-01-22 Refractory Intellectual Property Gmbh & Co. Kg Ungeformter feuerfester werkstoff, ein verfahren zur erstellung eines erdfeuchten ungeformten feuerfesten werkstoffs sowie eine verwendung des ungeformten feuerfesten werkstoffs
US8236720B2 (en) 2007-07-14 2012-08-07 Refractory Intellectual Property Gmbh & Co. Kg Unshaped refractory material, a process for producing an earth-moist, unshaped refractory material, and use of the unshaped refractory material
EA017320B1 (ru) * 2007-07-14 2012-11-30 Рифрэктори Интеллектуал Проперти Гмбх Унд Ко. Кг Неформованный огнеупорный материал, способ получения землисто-влажного неформованного огнеупорного материала, а также применение неформованного огнеупорного материала
CN107382292A (zh) * 2017-08-15 2017-11-24 贵州大学 一种环保型绿色茶具

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AU5570794A (en) 1994-07-19
BR9307724A (pt) 1999-08-31
TW304935B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1997-05-11
ATE150435T1 (de) 1997-04-15
MX9307923A (es) 1994-06-30
KR100241129B1 (ko) 2000-02-01
EP0675862A1 (en) 1995-10-11
GB9226662D0 (en) 1993-02-17
AU669769B2 (en) 1996-06-20
US6284688B1 (en) 2001-09-04
ES2099570T3 (es) 1997-05-16
CA2147247A1 (en) 1994-07-07
KR950704210A (ko) 1995-11-17
JPH08507282A (ja) 1996-08-06
CA2147247C (en) 2003-04-29
DE69309105T2 (de) 1997-08-21
EP0675862B1 (en) 1997-03-19
DE69309105D1 (de) 1997-04-24
IN182871B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1999-07-31
ZA939201B (en) 1994-08-08

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