WO2003076357A1 - A product for the protection of refractory materials - Google Patents

A product for the protection of refractory materials Download PDF

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Publication number
WO2003076357A1
WO2003076357A1 PCT/EP2003/002223 EP0302223W WO03076357A1 WO 2003076357 A1 WO2003076357 A1 WO 2003076357A1 EP 0302223 W EP0302223 W EP 0302223W WO 03076357 A1 WO03076357 A1 WO 03076357A1
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WIPO (PCT)
Prior art keywords
refractory materials
protection
set forth
product
product intended
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PCT/EP2003/002223
Other languages
French (fr)
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WO2003076357B1 (en
Inventor
Antonio Palumbo
Alberto Catania
Original Assignee
Beaumont Italia S.R.L.
Henkel Kommanditgesellschaft Auf Aktien
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Application filed by Beaumont Italia S.R.L., Henkel Kommanditgesellschaft Auf Aktien filed Critical Beaumont Italia S.R.L.
Priority to BR0303386-4A priority Critical patent/BR0303386A/en
Priority to AU2003214094A priority patent/AU2003214094A1/en
Priority to EP03709747A priority patent/EP1513780A1/en
Publication of WO2003076357A1 publication Critical patent/WO2003076357A1/en
Priority to NO20034586A priority patent/NO20034586D0/en
Publication of WO2003076357B1 publication Critical patent/WO2003076357B1/en

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    • 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
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/24—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing alkyl, ammonium or metal silicates; containing silica sols
    • C04B28/26—Silicates of the alkali metals
    • 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
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5076—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
    • C04B41/5089—Silica sols, alkyl, ammonium or alkali metal silicate cements
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B29/00—Other details of coke ovens
    • C10B29/06—Preventing or repairing leakages of the brickwork
    • 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
    • C04B2111/00482—Coating or impregnation materials
    • C04B2111/00551—Refractory coatings, e.g. for tamping
    • 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
    • C04B2111/72—Repairing or restoring existing buildings or building materials
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3201—Alkali metal oxides or oxide-forming salts thereof
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3279—Nickel oxides, nickalates, or oxide-forming salts thereof
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/442—Carbonates
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
    • C04B2235/448—Sulphates or sulphites
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M2900/00—Special features of, or arrangements for combustion chambers
    • F23M2900/05004—Special materials for walls or lining

Definitions

  • the subject of the present invention is a product intended for use in the protection and the repair of refractory materials, particularly but non exclu- sively the refractory materials of coke ovens.
  • the refractory materials forming the walls and the top horizontal channel are subjected to be damaged by the thermal stresses and by the abrasion exerted by the coke, especially when it is taken out of the oven.
  • the results are particularly a wear of the refractory materials and the crop up of fissures, with the ensuing need to proceed to repairs.
  • a deposition of graphite which should be removed.
  • the damage of the refractory materials also has the consequence of a discharge from the chimney, and consequent diffusion in the environment, of polluting powders, coke gas and aromatic polynuclear hydrocarbons.
  • the wear and the fissures of refractory materials are repaired by using three methods: the atomization of refractory material, the spraying of cement material along with water (so called cement gun), and the ceramic welding.
  • the first method consisting in atomizing refractory material, has the drawback of a very limited duration of the repair thus made.
  • the second method, the cement gun, is only suitable for the temporary repairs of the exterior sections of the ovens.
  • the third method consisting of the ceramic welding, results in repairs considerably more effective and durable than those obtained by either formerly mentioned methods, and allows to effectively repair the more evident fissures, however it requires a costly intervention and the removal of refractory material from the walls. No one of these methods, which only serve to make repairs, has the effect of improving the subsequent resistance to the damages of the refractory materials. There is presently known in commerce no powdery product intended to the treatment of refractory materials in order to increase their resis- tance to damages.
  • a first object of the present invention is to develop a prod- uct suitable for being applied onto refractory materials in order to improve their resistance to some causes of damage.
  • an object of the invention is to develop such a product whose manufacture does not involve technological difficulties, is of low cost and does not require the use of substances which are costly, are difficult to be found or involve dangers for the workers or for the environment.
  • the product intended for use in the protection and the repair of refractory materials includes alkaline salts of the silicic and/or metasilicic acid, fluxes and refining products.
  • the fluxes include fluxes derived from alkaline metals and hardening fluxes derived from boron.
  • the function of the alkaline salts of silicic and/or metasilicic acid is of forming, at the surface of the refractory materials onto which the product is applied, a vitreous or ceramic layer having a high hardness.
  • This layer effec- tively protects the refractory material from the wear by abrasion, reduces the friction coefficient with respect to the coke, thus reducing the resistances when the coke is taken out of the oven, and is suitable for obstructing, and therefore repairing, at least the minor fissures.
  • the function of the fluxes is to render more easy and uniform the building up of said vitreous or ceramic layer, and the fluxes derived from boron also have the function of increasing the hardness of said vitreous or ceramic layer.
  • the function of the refining products is to suppress or reduce the dishomogeneity of the components in the building up of said vitreous or ceramic layer.
  • the alkaline salts of the silicic and/or metasilicic acid have a weight ratio between alkali and silica from 1 to 3.
  • the fluxes derived from alkaline metals are sodium and/or potassium carbonate.
  • the hardening fluxes derived from boron are boric acid or sodium borate.
  • the refining products include sodium sulphate.
  • the alkaline salts of silicic and/or metasilicic acid are included in the product in a weight ratio from 30% to 60%, and more preferably from 45% to 60%.
  • the fluxes derived from alkaline metals are included in the product in a weight ratio from 10% to 25%, and more preferably from 10% to 20%.
  • the hardening fluxes derived from boron are included in the product in a weight ratio from 10% to 30%, and more preferably from 10% to 25%.
  • the refining products are included in the product in a weight ratio from 3% to 10%, and more preferably from 5% to 7%.
  • the product according to the invention does not involve the use of components which are costly, are difficult to be found or may produce damages to the persons or to the environment. It may be applied onto the refractory materials by atomization, using the techniques and the apparatuses already known and available for the atomization of other products, and without incurring any special difficulty.
  • a vitreous or ceramic layer which is glossy, has a high hardness, a high thermal and mechanic resistance and a low friction coefficient; it obstructs and repairs at least the minor fissures and protects the entire exposed surface of the refractory materials, thus noticeably increasing their useful duration and drastically reducing the interventions for repairs. Due to the fact that the surface of the refractory materials is left glossy, ensues a reduction of the stresses when the coke is taken out of the oven, and from the reduced damage of these materials ensues a high reduction in the discharge of powders from the chimney. Moreover the vitreous or ceramic layer produced has a scarce adhesion with respect to the graphite, and consequently the deposition of graphite is reduced and also reduced is the need of interventions for its removal, which is rendered more easy.
  • Example No. 1 The detailed composition of the products of this example is as follows: Pentahydrate or anhydrous sodium metasilicate having a weight ratio alkali/silica 1 :1 58 %
  • Example No. 2 The detailed composition of the products of this example is as follows: Sodium or potassium silicate having a weight ratio alkali/silica 1 :2 60 % Sodium borate 20 %
  • Example No. 3 The detailed composition of the products of this example is as follows: Sodium or potassium silicate having a weight ratio alkali/silica 1 :3 54,0 %
  • the stated components may be replaced by other components being technically equivalent, and the thermal cycles stated are the preferred ones but they may be replaced by other thermal cycles suitable for producing similar phenomena in rendering vitreous or ceramic the layer formed by the product. It is to be understood that the invention is not limited to the described embodiments. Several changes are possible for those skilled in the art, especially by replacing some components with technically equivalent ones and by possibly adding further components, as well as by modifying the thermal cycle applied to the product before the operation is resumed. These changes may be introduced in what has been described without departing from the spirit of the invention as stated in the Claims.

Abstract

A product intended for use in the protection and the possible repair of refractory materials, composed of alkaline salts of silicic and/or metasilicic acid, of fluxes and of refining products. The fluxes include fluxes derived from alkaline metals and hardening fluxes derived from boron, more particularly, the fluxes derived from alkaline metals may be sodium and/or potassium carbonate, and the hardening fluxes derived from boron may be boric acid or sodium borate. The refining products may consist in sodium sulphate. The product is intended mainly but not exclusively for the treatment of refractory materials in the coke ovens.

Description

DESCRIPTION
A PRODUCT FOR THE PROTECTION OF REFRACTORY MATERIALS
The subject of the present invention is a product intended for use in the protection and the repair of refractory materials, particularly but non exclu- sively the refractory materials of coke ovens.
In the practice of coke ovens, the refractory materials forming the walls and the top horizontal channel are subjected to be damaged by the thermal stresses and by the abrasion exerted by the coke, especially when it is taken out of the oven. The results are particularly a wear of the refractory materials and the crop up of fissures, with the ensuing need to proceed to repairs. Moreover, during the operation of the ovens takes place a deposition of graphite, which should be removed. These phenomena, even when they do not involve the need for a premature replacement of the refractory materials, often compel to stop the oven operation during periods, which on the average are of 3 to 4 days, devoted to the repairs and the cleanings, thus heavily weighing on the operating expenses of the ovens.
The damage of the refractory materials also has the consequence of a discharge from the chimney, and consequent diffusion in the environment, of polluting powders, coke gas and aromatic polynuclear hydrocarbons. Presently, the wear and the fissures of refractory materials are repaired by using three methods: the atomization of refractory material, the spraying of cement material along with water (so called cement gun), and the ceramic welding.
The first method, consisting in atomizing refractory material, has the drawback of a very limited duration of the repair thus made.
The second method, the cement gun, is only suitable for the temporary repairs of the exterior sections of the ovens.
The third method, consisting of the ceramic welding, results in repairs considerably more effective and durable than those obtained by either formerly mentioned methods, and allows to effectively repair the more evident fissures, however it requires a costly intervention and the removal of refractory material from the walls. No one of these methods, which only serve to make repairs, has the effect of improving the subsequent resistance to the damages of the refractory materials. There is presently known in commerce no powdery product intended to the treatment of refractory materials in order to increase their resis- tance to damages.
The problems discussed above are characteristic of the refractory materials used in the coke ovens, however similar problems are presented by refractory materials used in other applications too.
Therefore, a first object of the present invention is to develop a prod- uct suitable for being applied onto refractory materials in order to improve their resistance to some causes of damage.
Another object of the invention is to develop a product which, when applied onto refractory materials, should also be suitable for repairing some damages or defects. Still another object of the invention is to develop, such a product whose application onto refractory materials does not involve problems and may be effected by simple operations of low cost.
Finally, an object of the invention is to develop such a product whose manufacture does not involve technological difficulties, is of low cost and does not require the use of substances which are costly, are difficult to be found or involve dangers for the workers or for the environment.
According to the invention, the product intended for use in the protection and the repair of refractory materials includes alkaline salts of the silicic and/or metasilicic acid, fluxes and refining products. Preferably, the fluxes include fluxes derived from alkaline metals and hardening fluxes derived from boron.
The function of the alkaline salts of silicic and/or metasilicic acid is of forming, at the surface of the refractory materials onto which the product is applied, a vitreous or ceramic layer having a high hardness. This layer effec- tively protects the refractory material from the wear by abrasion, reduces the friction coefficient with respect to the coke, thus reducing the resistances when the coke is taken out of the oven, and is suitable for obstructing, and therefore repairing, at least the minor fissures. The function of the fluxes is to render more easy and uniform the building up of said vitreous or ceramic layer, and the fluxes derived from boron also have the function of increasing the hardness of said vitreous or ceramic layer. The function of the refining products is to suppress or reduce the dishomogeneity of the components in the building up of said vitreous or ceramic layer.
Preferably, the alkaline salts of the silicic and/or metasilicic acid have a weight ratio between alkali and silica from 1 to 3. Preferably the fluxes derived from alkaline metals are sodium and/or potassium carbonate.
Preferably the hardening fluxes derived from boron are boric acid or sodium borate.
Preferably the refining products include sodium sulphate. Preferably the alkaline salts of silicic and/or metasilicic acid are included in the product in a weight ratio from 30% to 60%, and more preferably from 45% to 60%.
Preferably the fluxes derived from alkaline metals are included in the product in a weight ratio from 10% to 25%, and more preferably from 10% to 20%.
Preferably the hardening fluxes derived from boron are included in the product in a weight ratio from 10% to 30%, and more preferably from 10% to 25%.
Preferably the refining products are included in the product in a weight ratio from 3% to 10%, and more preferably from 5% to 7%.
As it may be remarked from the foregoing, the product according to the invention does not involve the use of components which are costly, are difficult to be found or may produce damages to the persons or to the environment. It may be applied onto the refractory materials by atomization, using the techniques and the apparatuses already known and available for the atomization of other products, and without incurring any special difficulty.
After the application of the product according to the invention, during a suitable heating to be effected before resuming the operation, on the refractory material is built up a vitreous or ceramic layer which is glossy, has a high hardness, a high thermal and mechanic resistance and a low friction coefficient; it obstructs and repairs at least the minor fissures and protects the entire exposed surface of the refractory materials, thus noticeably increasing their useful duration and drastically reducing the interventions for repairs. Due to the fact that the surface of the refractory materials is left glossy, ensues a reduction of the stresses when the coke is taken out of the oven, and from the reduced damage of these materials ensues a high reduction in the discharge of powders from the chimney. Moreover the vitreous or ceramic layer produced has a scarce adhesion with respect to the graphite, and consequently the deposition of graphite is reduced and also reduced is the need of interventions for its removal, which is rendered more easy.
In order to better clarify the invention, some examples of preferred embodiments thereof are described in the following.
Example No. 1. The detailed composition of the products of this example is as follows: Pentahydrate or anhydrous sodium metasilicate having a weight ratio alkali/silica 1 :1 58 %
Boric acid 15 %
Potassium carbonate 20 % Sodium sulphate 7 %
With this composition, very good results are obtained when effecting the heating before resuming the operation by means of a thermal cycle comprising a first heating during 10 hours at 1200 °C (temperature at the burners) then a heating during 4 hours at 1000 °C and finally a heating during 6-8 hours at 1200 °C.
Example No. 2. The detailed composition of the products of this example is as follows: Sodium or potassium silicate having a weight ratio alkali/silica 1 :2 60 % Sodium borate 20 %
Potassium carbonate 18 %
Sodium sulphate 5 % With this composition, very good results are obtained when effecting the heating before resuming the operation by means of a thermal cycle corresponding to that stated in Example No. 1.
Example No. 3. The detailed composition of the products of this example is as follows: Sodium or potassium silicate having a weight ratio alkali/silica 1 :3 54,0 %
Sodium borate 25,0 %
Potassium carbonate 15,5 % Sodium sulphate 5,5 %
With this composition, very good results are obtained when effecting the heating before resuming the operation by means of a thermal cycle comprising a single heating during 24 hours at a temperature of the walls of at least 900 °C (temperature at the burners of 1000 to 1050 °C).
Of course, the stated components may be replaced by other components being technically equivalent, and the thermal cycles stated are the preferred ones but they may be replaced by other thermal cycles suitable for producing similar phenomena in rendering vitreous or ceramic the layer formed by the product. It is to be understood that the invention is not limited to the described embodiments. Several changes are possible for those skilled in the art, especially by replacing some components with technically equivalent ones and by possibly adding further components, as well as by modifying the thermal cycle applied to the product before the operation is resumed. These changes may be introduced in what has been described without departing from the spirit of the invention as stated in the Claims.

Claims

1 . A product intended for use in the protection and the possible repair of refractory materials, characterized in that it includes alkaline salts of the silicic and/or metasilicic acid, fluxes and refining products.
2 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in Claim 1 , characterized in that the fluxes include fluxes derived from alkaline metals and hardening fluxes derived from boron.
3 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in Claim 1 , characterized in that the alkaline salts of the silicic and/or metasilicic acid have a weight ratio between alkali and silica from 1 to 3.
4 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in Claim 1 , characterized in that the fluxes derived from alkaline metals are sodium and/or potassium carbonate.
5 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in Claim 1 , characterized in that the hardening fluxes derived from boron are boric acid or sodium borate.
6 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in Claim 1 , characterized in that the refining products include sodium sulphate.
7 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in Claim 1 , characterized in that the alkaline salts of silicic and/or metasilicic acid are included in the product in a weight ratio from 30% to 60%, and preferably from 45% to 60%.
8 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in Claim 1 , characterized in that the fluxes derived from alkaline metals are included in the product in a weight ratio from 10% to 25%, and preferably from 10% to 20%.
9 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in Claim 1 , characterized in that the hardening fluxes derived from boron are included in the product in a weight ratio from 10% to 30%, and preferably from 10% to 25%.
10 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in Claim 1 , characterized in that the refining products are included in the product in a weight ratio from 3% to 10%, and preferably from 5% to 7%.
1 1 . A product intended for use in the protection and the possible re- pair of refractory materials, as set forth in one or more of the foregoing
Claims, characterized by a composition at least approximately corresponding to the following one:
Pentahydrate or anhydrous sodium metasilicate having a weight ratio alkali/silica 1 :1 58 % Boric acid 15 %
Potassium carbonate 20 %
Sodium sulphate 7 %
12 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in one or more of the foregoing Claims, characterized by a composition at least approximately corresponding to the following one:
Sodium or potassium silicate having a weight ratio alkali/silica 1 :2 60 %
Sodium borate 20 % Potassium carbonate 18 %
Sodium sulphate 5 %
13 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in one or more of the foregoing Claims, characterized by a composition at least approximately corresponding to the following one: Sodium or potassium silicate having a weight ratio alkali/silica 1 :3 54,0 %
Sodium borate 25,0 %
Potassium carbonate 15,5 % Sodium sulphate 5,5 %
14 . A product intended for use in the protection and the possible repair of refractory materials, as set forth in one or more of the foregoing Claims, characterized by its particular destination to refractory materials of coke ovens.
15 . A product intended for use in the protection and the possible repair of refractory materials, characterized by the peculiarities, components and compositions, as they appear from the foregoing specification or replaced by technically equivalent means and possibly added with further components.
PCT/EP2003/002223 2002-03-13 2003-03-04 A product for the protection of refractory materials WO2003076357A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BR0303386-4A BR0303386A (en) 2002-03-13 2003-03-04 Dry powder product intended for use by spray drying to protect and possibly repair refractory materials
AU2003214094A AU2003214094A1 (en) 2002-03-13 2003-03-04 A product for the protection of refractory materials
EP03709747A EP1513780A1 (en) 2002-03-13 2003-03-04 A product for the protection of refractory materials
NO20034586A NO20034586D0 (en) 2002-03-13 2003-10-13 Product for protection and repair of refractory materials

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO2002A000217 2002-03-13
IT2002TO000217A ITTO20020217A1 (en) 2002-03-13 2002-03-13 PRODUCT FOR THE PROTECTION OF REFRACTORY MATERIALS.

Publications (2)

Publication Number Publication Date
WO2003076357A1 true WO2003076357A1 (en) 2003-09-18
WO2003076357B1 WO2003076357B1 (en) 2005-01-06

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PCT/EP2003/002223 WO2003076357A1 (en) 2002-03-13 2003-03-04 A product for the protection of refractory materials

Country Status (8)

Country Link
EP (1) EP1513780A1 (en)
CN (1) CN100441540C (en)
AU (1) AU2003214094A1 (en)
BR (1) BR0303386A (en)
IT (1) ITTO20020217A1 (en)
NO (1) NO20034586D0 (en)
PL (1) PL205514B1 (en)
WO (1) WO2003076357A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7678291B2 (en) * 2004-07-05 2010-03-16 Abc Research Laboratory For Building Materials Co., Ltd. Snow-melting/antifreezing agents

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1017674A3 (en) * 2007-07-05 2009-03-03 Fib Services Internat REFRACTORY WALL CHAMBER TREATING COMPOSITION AND METHOD FOR CARRYING OUT THE SAME.

Citations (3)

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Publication number Priority date Publication date Assignee Title
FR779168A (en) * 1934-10-02 1935-03-30 Cie Internationale De Produits Improvements made to fireproof and heat-insulating plasters
FR2202053A1 (en) * 1972-10-09 1974-05-03 Hoogovens Ijmuiden Bv
EP0708069A1 (en) * 1994-10-14 1996-04-24 Kawasaki Steel Corporation Surface-treating agent for high-temperature refractory material and method for treatment therewith

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR779168A (en) * 1934-10-02 1935-03-30 Cie Internationale De Produits Improvements made to fireproof and heat-insulating plasters
FR2202053A1 (en) * 1972-10-09 1974-05-03 Hoogovens Ijmuiden Bv
EP0708069A1 (en) * 1994-10-14 1996-04-24 Kawasaki Steel Corporation Surface-treating agent for high-temperature refractory material and method for treatment therewith

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Title
CHEMICAL ABSTRACTS, vol. 111, no. 14, 2 October 1989, Columbus, Ohio, US; abstract no. 120021q, page 298; XP000153384 *
CHEMICAL ABSTRACTS, vol. 96, no. 8, 22 February 1982, Columbus, Ohio, US; abstract no. 56965t, page 311; XP000063983 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7678291B2 (en) * 2004-07-05 2010-03-16 Abc Research Laboratory For Building Materials Co., Ltd. Snow-melting/antifreezing agents

Also Published As

Publication number Publication date
PL205514B1 (en) 2010-04-30
CN1639083A (en) 2005-07-13
NO20034586L (en) 2003-10-13
NO20034586D0 (en) 2003-10-13
EP1513780A1 (en) 2005-03-16
PL372348A1 (en) 2005-07-11
WO2003076357B1 (en) 2005-01-06
CN100441540C (en) 2008-12-10
BR0303386A (en) 2004-03-30
AU2003214094A1 (en) 2003-09-22
ITTO20020217A0 (en) 2002-03-13
ITTO20020217A1 (en) 2003-09-15

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