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WO2000001639A1 - Compositions refractaires - Google Patents

Compositions refractaires Download PDF

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Publication number
WO2000001639A1
WO2000001639A1 PCT/GB1999/001953 GB9901953W WO0001639A1 WO 2000001639 A1 WO2000001639 A1 WO 2000001639A1 GB 9901953 W GB9901953 W GB 9901953W WO 0001639 A1 WO0001639 A1 WO 0001639A1
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WO
WIPO (PCT)
Prior art keywords
refractory
particulate
composition
composition according
formaldehyde resin
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/GB1999/001953
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English (en)
Inventor
Jay Tu
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.)
Foseco International Ltd
Original Assignee
Foseco International Ltd
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Filing date
Publication date
Application filed by Foseco International Ltd filed Critical Foseco International Ltd
Priority to AU49174/99A priority Critical patent/AU4917499A/en
Publication of WO2000001639A1 publication Critical patent/WO2000001639A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing 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
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing 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
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing 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
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63452—Polyepoxides
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing 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
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63472—Condensation polymers of aldehydes or ketones
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C04B35/65—Reaction sintering of free metal- or free silicon-containing compositions
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • 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
    • 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
    • F27D1/1626—Making linings by compacting a refractory mass in the space defined by a backing mould or pattern and the furnace wall

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, have usually been produced by methods, such as ramming, trowelling, spraying or casting, using wet refractory compositions in the form of an aqueous slurry or a mouldable or castable mass.
  • Such methods have disadvantages in that they are time consuming, since apart from the initial 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 segregate.
  • 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, and sometimes compressed air, for producing the compositions in a form suitable for application.
  • US - A - 2499729 describes a refractory composition for lining surfaces such as moulds and furnace walls consisting of a mixture of a comminuted dry refractory substance and sodium metasiiicate nonahydrate which gives up water of crystallisation when heated above 43° C and produces self-tempering and setting of the mixtures on application to the surface to be lined.
  • EP - A - 0064863 describes a method of applying a monolithic refractory layer within a metallurgical vessel using a substantially dry particulate 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.
  • WO - A - 92/09542 describes a thermally activated, dry refractory composition which is used for the production of a new refractory lining or for the repair of an existing refractory lining in a furnace or a 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 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.
  • WO- A - 94/14727 describes a substantially dry, self-hardening, thermally activated refractory composition
  • a substantially dry, self-hardening, thermally activated refractory composition comprising a particulate 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.
  • Suitable inorganic binders having chemically bound water associated therewith are crystalline hydrated salts such as silicates, carbonates, sulphates, nitrates, borates and phosphates.
  • the element or compound which will react exothermically with the inorganic binder may be for example ferrosilicon, calcium oxide, magnesium oxide, aluminium or cement.
  • the hydrated compound used in the refractory compositions is principally a sodium metasiiicate hydrate.
  • Refractory compositions containing silica suffer from disadvantages when used to form linings or other articles which are to contact molten iron, and in particular iron for producing ductile iron castings, because silica reacts with carbon in the iron resulting in silicon pick-up, and also with the iron itself forming an iron silicate and hence increasing the amount of slag formed during casting.
  • Silica will also react with or be reduced by aluminium in aluminium-killed steel and this can cause silicon pick-up, and also nozzle clogging in continuous casting of the steel.
  • the presence of sodium can significantly decrease the refractoriness of the composition.
  • thermosetting organic binder an element, compound or alloy which will react with oxygen to produce a refractory bond
  • a dry, heat-settable refractory composition comprising a particulate refractory material, a particulate thermosetting organic binder, and a particulate element, compound or alloy which will react with oxygen to produce a refractory bond.
  • the particulate refractory material used in the composition will be chosen according to the application for which the composition is intended, taking account of such factors as the temperature of the molten metal with which the composition is to come into contact, and whether the particulate refractory material will react with the molten metal.
  • refractory materials which may be used include alumina (for example bauxite or corundum), magnesia (for example calcined or dead burnt magnesite), zircon, silica, silicon carbide, calcined dolomite, chrome magnesite, olivine, forsterite, an aluminosilicate (for example mullite, kyanite, andalusite or chamotte), chromite and carbon, and mixtures of one or more of these materials.
  • alumina for example bauxite or corundum
  • magnesia for example calcined or dead burnt magnesite
  • zircon zircon
  • silica silicon carbide
  • chrome magnesite chrome magnesite
  • olivine chrome magnesite
  • olivine forsterite
  • an aluminosilicate for example mullite, kyanite, andalusite or chamotte
  • chromite and carbon and mixtures of one or more
  • the particulate refractory material may also be wholly or partly a low density material such as aluminosilicate or glass hollow microspheres such as EXTENDOSPHERES, fly ash floaters or cenospheres such as FILLITE, or light weight high-alumina aggregates or grogs (one such material is available commercially under the trade name PL.ASMAL), in order to improve the heat-insulating properties of the refractory composition.
  • a low density material such as aluminosilicate or glass hollow microspheres such as EXTENDOSPHERES, fly ash floaters or cenospheres such as FILLITE, or light weight high-alumina aggregates or grogs (one such material is available commercially under the trade name PL.ASMAL), in order to improve the heat-insulating properties of the refractory composition.
  • Silica free linings based on alumina and/or magnesia are preferred for refractory compositions intended for use for lining applications for vessels which are to contain molten iron, and in particular molten ductile iron.
  • the presence of silica is disadvantageous for the same reasons that sodium silicate is disadvantageous as a binder in similar lining applications.
  • Silica will react with carbon to form silicon and carbon monoxide giving rise to silicon pick-up, and, because silicon and carbon are not in equilibrium in liquid iron, prevention of carbon loss.
  • Silica will react with iron oxide present from rust or from overheated scrap producing fayalite (Fe 2 Si0 ) and giving rise to increased slag.
  • Silica will also cause magnesium loss as it will react with magnesium to produce magnesium silicate (MgSi0 3 ) in the form of stringy-type dross inclusions.
  • Boron-containing additives are often used as sintering aids in refractory linings.
  • the refractory compositions of the invention are boron free because boron is a powerful carbide forming element and as little as 0.002% boron can result in intercellular carbides and a deterioration in the mechanical properties of cast iron.
  • thermosetting organic binder may be for example a phenol-formaldehyde resin, a urea-formaldehyde resin, a melamine-formaldehyde resin, an epoxy resin or a silicone.
  • the preferred thermosetting organic binder is preferably a novolak phenol-formaldehyde resin.
  • Thermosetting novolak phenol-formaldehyde resins usually contains hexmethylenetetramine as cross-linking and curing agent, and on heat curing such resins produce an unpleasant smell. Therefore in order to produce a refractory composition which in use is as environmentally friendly as possible, it is preferred that the phenol-formaldehyde resin contains only the minimum amount of hexamethylenetetramine needed to ensure efficient curing of the resin in order to eliminate the problem of the unpleasant smell as far as is possible.
  • the element, compound or alloy which will react with oxygen to produce a refractory bond may be for example aluminium, magnesium, silicon, calcium boride (CaB 6 ), boron carbide (BC 4 ), calcium suicide (CaSi 2 ), ferrosilicon (FeSi 2 ) or a magnesium-aluminium alloy having the formula Mg 17 AI 1 . If desired, more than one element, compound or alloy may be used.
  • the Mg 17 Ali2 alloy is preferred.
  • the alloy has a low eutectic temperature in the binary Mg-AI system, and on heating to a temperature above 450° C, it will react exothermically with oxygen to form Mg-AI-spinel (MgAI 2 0 4 ) plus magnesium oxide producing a highly refractory ceramic bond, and affording protection for the carbon bond formed by decomposition of the thermosetting organic binder.
  • Mg-AI-spinel Mg-AI 2 0 4
  • Such a bond is free of alkaline elements which are present when using an alkali metal silicate binder, and is thermochemically compatible with a wide variety of particulate refractory materials which may be used.
  • a further advantage results from the fact that when the reaction to form Mg-AI-spinel and MgO takes place there is a small but permanent volume expansion, because when the refractory composition is used to produce a lining the expansion tends to compensate for the shrinkage which can occur due to high temperature sintering, and improves the thermal stress resistance.
  • the refractory composition of the invention will usually contain 85 -95% by weight of particulate refractory material, preferably alumina and/or magnesia, 1 - 10% by weight of thermosetting organic binder, preferably a novolak phenol-formaldehyde resin containing a low amount of hexamethylenetetramine as curing agent, 1 - 10% by weight of an element, compound or alloy which will react with oxygen to produce a refractory bond, preferably the alloy Mg 17 AI 12 .
  • particulate refractory material preferably alumina and/or magnesia
  • thermosetting organic binder preferably a novolak phenol-formaldehyde resin containing a low amount of hexamethylenetetramine as curing agent, 1 - 10% by weight of an element, compound or alloy which will react with oxygen to produce a refractory bond, preferably the alloy Mg 17 AI 12 .
  • the refractory composition may, if desired, also contain other constituents, such as a sintering agent, which may itself be a compound or alloy which will react with oxygen to produce a refractory bond, such as calcium boride (CaB 6 ), boron carbide (BC 4 ), calcium suicide (CaSi 2 ) or ferrosilicon (FeSi 2 ), or a material which will make the composition more resistant to wetting by molten metal, for example zirconia or boron nitride.
  • a sintering agent which may itself be a compound or alloy which will react with oxygen to produce a refractory bond
  • a sintering agent such as calcium boride (CaB 6 ), boron carbide (BC 4 ), calcium suicide (CaSi 2 ) or ferrosilicon (FeSi 2 )
  • a material which will make the composition more resistant to wetting by molten metal for example zirconia or boron nit
  • a sintering agent may be desirable when the composition is to be used as a lining which is to be in contact with molten grey, malleable or ductile iron, and both a sintering agent and a material which will improve the non-wetting properties of the composition may be desirable when the composition is to be used as a lining which is to be on contact with molten aluminium or aluminium alloys.
  • these additional constituents will usually amount to up to 10% by weight of the refractory composition.
  • the dry heat-settable refractory compositions of the invention may be prepared simply by thoroughly mixing together the individual components.
  • the particle size of the individual components will usually be in the range of a maximum of 5000 microns down to less than 44 microns.
  • 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 or mandrel with the composition, and heating the composition, and then removing the former or mandrel if used.
  • the heating procedure used will be dependent on such factors as the actual composition, its density, its mass, the mould or lining thickness, the complexity of the lining geometry, and the heat energy input.
  • the compositions will usually be heated to a temperature of 150° to 350°C.
  • the refractory compositions of the invention are dry flowable mixtures of particulate materials, which may be readily used for a variety of applications, and in particular for producing facing or backing linings for furnaces, for metallurgical vessels such as ladles, tundishes or launders, or for producing refractory shapes, for use in the treatment and/or casting of a variety of molten metals such as iron, steel or aluminium.
  • Phosphoric acid or metal phosphates are commonly used as binders or sintering additives in lining refractories.
  • the compositions of the invention can be produced without the need to include phosphorus-containing compounds. This is advantageous when the compositions are used as linings in the casting of iron because phosphorus reacts with iron to form needle-shaped iron phosphate which can cause machining difficulties and embrittlement when casting grey or ductile iron.
  • compositions are dry is also advantageous in cold-start practice (i.e. when molten metal is poured into a lined vessel without preheating of the lining) compared with known linings which contain water.
  • the water in the known linings on contact with molten metal would be transformed into H 2 , 0 2 , [H] and [O] (the latter two being soluble elements), giving rise to reoxidation and hydrogen defects, and resulting in oxide defects in metals in general and promoting carbide formation (for example in iron) or embrittlement (for example in steel) respectively.
  • the set lining may be coated with a thin layer of a refractory material, for example a zirconia coating when the lining is used for steel, a zirconia or silicon carbide coating when the lining is used for grey, malleable or ductile iron, or a boron nitride coating when the lining is used for aluminium.
  • a refractory material for example a zirconia coating when the lining is used for steel, a zirconia or silicon carbide coating when the lining is used for grey, malleable or ductile iron, or a boron nitride coating when the lining is used for aluminium.
  • a dry, heat-settable refractory composition was prepared by mixing together the following components in the proportions indicated :-
  • Phenol-formaldehyde resin (- 200 mesh ASTM ) 3.5
  • the phenol-formaldehyde resin was a proprietary resin having a very low hexamethylenetetramine content available under the trade name DURITE RD-201C from Borden Inc.
  • the composition was used to a produce cylinder 50mm in diameter and 50mm in height by filling the composition into a steel tube and heating the filled tube in an electric furnace at 200° C for about 2 hours. After cooling the hardened cylinder was removed from the tube.
  • the gas permeability of the cylinder was determined using a GF permeability tester of the type used for determining the permeability of foundry sand test cores.
  • the composition was also used to produce rectangular bars (25mm x 25mm x 150mm) by filling the composition into multiple cavities of a steel tool.
  • the filled tool was heated in an electric furnace at 200° C for about 2 hours. After cooling the hardened bars were removed from the tool and their density was determined.
  • the transverse strength or modulus of rupture (MOR) of the bars was determined using a Soiltest Versa-Loader at a constant loading rate of 2mm/minute.
  • the density, MOR and permanent linear change (PLC) were also determined after the bars had been fired at 1600° C for 2 hours.
  • a dry, heat-settable refractory composition was prepared by mixing together the following components in the proportions indicated :-
  • Bauxite (- 48 mesh ASTM) 20.0 90% alumina grog (PLASMAL nominally
  • Phenol-formaldehyde resin (200 mesh ASTM) 4.5 Mg 17 AI 12 alloy (200 mesh ASTM ) 5.5 Th e phenol-formaldehyde resin was the same as that used in Example
  • Example 2 The composition was used and tested as described in Example 1 except that the MOR was also determined on bars which had been heated to 1100° C for 2 hours and then cooled.
  • a dry, heat-settable refractory composition was prepared by mixing together the following components in the proportions indicated :-
  • Phenol-formaldehyde resin (-200 mesh ASTM) 3.5
  • the composition was poured into the bottom of a lip-pour ladle.
  • a mandrel coated with a fluorocarbon aerosol release agent was placed inside the ladle cavity, and secured to the ladle shell, and the space between the mandrel and the inner surface of the ladle was filled with the composition to produce a lining.
  • the mandrel was heated for 12-16 minutes per 50 kg of the lining composition using a gas torch until the lined turned dark brown in colour, and the mandrel was then allowed to cool and removed.
  • the lining was then preheated to 1000 to 1200° C. This required a burner of 5270 kJ/hr gas input for 100 kg of lining material.
  • the ladle was covered with a refractory fibre blanket to minimised heat loss.
  • a dry, heat-settable refractory composition was prepared by mixing together the following components in the proportions indicated :-
  • Dead burnt magnesite (-100 mesh ASTM) 15.0
  • Phenol-formaldehyde resin (-200 mesh ASTM) 4.5
  • the phenol-formaldehyde resin was the same as that used in Example
  • a hardened plate was also produced from the composition and the rate of heat loss through the composition and the total heat loss after 1 hour were determined using the plate on AMITEC equipment of the type described in British Patent No. 1018703.
  • a dry, heat-settable refractory composition was prepared by mixing together the following components in the proportions indicated :-
  • Phenol-formaldehyde resin (- 200 mesh ASTM ) 3.5
  • composition was used and tested as described in Example 1 except that the PLC was not determined and the MOR was determined only on bars which had been heated for 2 hours at 1200° C.

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  • Ceramic Engineering (AREA)
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  • Organic Chemistry (AREA)
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Abstract

L'invention concerne une composition réfractaire thermodurcissable sèche, comprenant un matériau particulaire réfractaire, un liant organique thermodurcissable particulaire, un élément, un composé ou un alliage particulaire qui réagit avec l'oxygène pour produire une liaison réfractaire. Le matériau réfractaire particulaire peut comprendre un matériau sélectionné dans les matériaux suivants: l'alumine, la magnésie, le zircon, la silice, le carbure de silicium, la dolomite calcinée, la chromite-magnésie, l'olivine, la forstérite, un silicate alumineux, la chromite, le carbone et des mélanges comprenant au moins l'un de ces matériaux. Le liant organique thermodurcissable particulaire peut comprendre une résine de phénol-formaldéhyde, une résine d'urée-formaldéhyde, une résine de mélanine-formaldéhyde, une résine époxy, un silicone, ou un mélange comprenant au moins l'un des ces liants. L'élément, le composé ou l'alliage particulaire qui réagit avec l'oxygène pour produire une liaison réfractaire peut comprendre de l'aluminium, du magnésium, du silicium, du borure de calcium (CaB6), du carbure de bore (BC4), du siliciure de calcium (CaSi2), du ferrosilicium (FeSi2), un alliage de magnésium-aluminium représenté par la formule Mg17Al12 ou un mélange comprenant au moins l'un de ces matériaux.
PCT/GB1999/001953 1998-07-01 1999-07-01 Compositions refractaires Ceased WO2000001639A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU49174/99A AU4917499A (en) 1998-07-01 1999-07-01 Refractory compositions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9814205.2 1998-07-01
GBGB9814205.2A GB9814205D0 (en) 1998-07-01 1998-07-01 Refactory compositions

Publications (1)

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WO2000001639A1 true WO2000001639A1 (fr) 2000-01-13

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AR (1) AR018957A1 (fr)
AU (1) AU4917499A (fr)
GB (1) GB9814205D0 (fr)
ID (1) ID23568A (fr)
WO (1) WO2000001639A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10163743A1 (de) * 2001-12-21 2003-07-10 Ahc Oberflaechentechnik Gmbh Beschichteter Gegenstand aus Stahl
EP1522358A1 (fr) * 2003-10-11 2005-04-13 Pyrotek Engineering Materials Limited Poche de coulée
WO2007140990A1 (fr) * 2006-06-06 2007-12-13 Skw Giesserei Gmbh Procédé de fabrication de corps moulés et leur utilisation
CN104805318A (zh) * 2015-04-15 2015-07-29 哈尔滨工业大学 一种球形tc4颗粒增强az91镁基复合材料的制备方法
WO2018002068A1 (fr) 2016-06-30 2018-01-04 Calderys France Agent de frittage pour composition réfractaire à particules sèches
CN115007845A (zh) * 2022-06-15 2022-09-06 攀钢集团攀枝花钢铁研究院有限公司 一种高洁净钢生产过程引流砂填充方法
CN115124359A (zh) * 2022-07-20 2022-09-30 浙江锦诚新材料股份有限公司 一种水泥窑专用高稳定性镁铁尖晶石砖及其制备方法
CN116947459A (zh) * 2023-09-20 2023-10-27 河北国亮新材料股份有限公司 一种抗钢水冲刷的中间包冲击板及其制备方法
CN118420362A (zh) * 2024-07-04 2024-08-02 洛阳申耐电力设备有限公司 一种中频炉炉底用导磁浇注料及其制备方法
EP4302899A4 (fr) * 2021-03-01 2025-01-01 Akechi Ceramics Co., Ltd. Matériau d'isolation pour objet réfractaire

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CN116589288A (zh) * 2023-04-21 2023-08-15 江苏苏嘉集团新材料有限公司 一种抗氧化的镁碳砖

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EP0116194A1 (fr) * 1983-02-11 1984-08-22 Shinagawa Refractories Co., Ltd. Matériau réfractaire contenant du carbone
WO1991017969A1 (fr) * 1990-05-14 1991-11-28 Quigley Company, Inc. Composition de materiau refractaire sec
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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10163743A1 (de) * 2001-12-21 2003-07-10 Ahc Oberflaechentechnik Gmbh Beschichteter Gegenstand aus Stahl
DE10163743B4 (de) * 2001-12-21 2006-07-06 AHC-Oberflächentechnik GmbH & Co. OHG Beschichteter Gegenstand aus Stahl, Verfahren zu seiner Herstellung und seine Verwendung
EP1522358A1 (fr) * 2003-10-11 2005-04-13 Pyrotek Engineering Materials Limited Poche de coulée
CN100381232C (zh) * 2003-10-11 2008-04-16 皮罗泰克工程材料有限公司 铸勺
WO2007140990A1 (fr) * 2006-06-06 2007-12-13 Skw Giesserei Gmbh Procédé de fabrication de corps moulés et leur utilisation
CN104805318A (zh) * 2015-04-15 2015-07-29 哈尔滨工业大学 一种球形tc4颗粒增强az91镁基复合材料的制备方法
WO2018002068A1 (fr) 2016-06-30 2018-01-04 Calderys France Agent de frittage pour composition réfractaire à particules sèches
EP4302899A4 (fr) * 2021-03-01 2025-01-01 Akechi Ceramics Co., Ltd. Matériau d'isolation pour objet réfractaire
CN115007845A (zh) * 2022-06-15 2022-09-06 攀钢集团攀枝花钢铁研究院有限公司 一种高洁净钢生产过程引流砂填充方法
CN115007845B (zh) * 2022-06-15 2024-03-15 攀钢集团攀枝花钢铁研究院有限公司 一种高洁净钢生产过程引流砂填充方法
CN115124359A (zh) * 2022-07-20 2022-09-30 浙江锦诚新材料股份有限公司 一种水泥窑专用高稳定性镁铁尖晶石砖及其制备方法
CN116947459A (zh) * 2023-09-20 2023-10-27 河北国亮新材料股份有限公司 一种抗钢水冲刷的中间包冲击板及其制备方法
CN116947459B (zh) * 2023-09-20 2023-12-15 河北国亮新材料股份有限公司 一种抗钢水冲刷的中间包冲击板及其制备方法
CN118420362A (zh) * 2024-07-04 2024-08-02 洛阳申耐电力设备有限公司 一种中频炉炉底用导磁浇注料及其制备方法

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