FR2735767A1 - Preparation of granulated steel process slag for use in hydraulic cements or road surfaces - Google Patents
Preparation of granulated steel process slag for use in hydraulic cements or road surfaces Download PDFInfo
- Publication number
- FR2735767A1 FR2735767A1 FR9507549A FR9507549A FR2735767A1 FR 2735767 A1 FR2735767 A1 FR 2735767A1 FR 9507549 A FR9507549 A FR 9507549A FR 9507549 A FR9507549 A FR 9507549A FR 2735767 A1 FR2735767 A1 FR 2735767A1
- Authority
- FR
- France
- Prior art keywords
- slag
- preparation
- aggregates
- oxygen
- granulate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002893 slag Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 8
- 239000010959 steel Substances 0.000 title claims abstract description 8
- 239000011396 hydraulic cement Substances 0.000 title abstract 2
- 239000000203 mixture Substances 0.000 claims abstract description 12
- 239000008187 granular material Substances 0.000 claims abstract description 6
- 238000012216 screening Methods 0.000 claims abstract description 4
- 238000000926 separation method Methods 0.000 claims abstract description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 20
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 10
- 239000001569 carbon dioxide Substances 0.000 claims description 10
- 239000004567 concrete Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 238000007664 blowing Methods 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 238000001033 granulometry Methods 0.000 abstract 1
- 206010042674 Swelling Diseases 0.000 description 13
- 230000008961 swelling Effects 0.000 description 13
- 238000009434 installation Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000000463 material Substances 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 235000013365 dairy product Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
- C04B18/142—Steelmaking slags, converter slags
- C04B18/143—L.D. slags, i.e. Linz-Donawitz slags
-
- 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
- C04B28/02—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 hydraulic cements other than calcium sulfates
-
- 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
- C04B5/00—Treatment of metallurgical slag ; Artificial stone from molten metallurgical slag
- C04B5/06—Ingredients, other than water, added to the molten slag or to the granulating medium or before remelting; Treatment with gases or gas generating compounds, e.g. to obtain porous slag
-
- 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
- C04B2111/32—Expansion-inhibited materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
- Furnace Details (AREA)
Abstract
Description
Procédé de préparation de granulats, notamment pour utilisation en génie civil, à partir de laitier d'aciérie de conversion à l'oxygène
L'invention concerne un procédé de préparation de granulats à partir de laitiers de conversion d'acier à l'oxygène.Process for the preparation of aggregates, in particular for use in civil engineering, from slag from oxygen-converting steelworks
The invention relates to a process for the preparation of aggregates from slag for the conversion of steel to oxygen.
D'une manière générale, on utilise des granulats par exemple pour la préparation de bétons hydrauliques ou pour la préparation de compositions de revêtement, notamment de revêtements routiers. In general, aggregates are used for example for the preparation of hydraulic concretes or for the preparation of coating compositions, in particular road coatings.
La préparation des granulats, notamment leur granulométrie, dépend de l'application visée. The preparation of aggregates, in particular their particle size, depends on the intended application.
Pour la préparation physique des granulats à la granulométrie requise, on procède généralement par concassage, criblage et séparation en fractions granulométriques,
II est connu d'élaborer des granulats à partir de laitiers de hauts fourneaux, tel que décrit par exemple dans le brevet FR 2 668 474.For the physical preparation of the aggregates to the required particle size, it is generally carried out by crushing, screening and separation into particle size fractions,
It is known to produce aggregates from slag from blast furnaces, as described for example in patent FR 2,668,474.
II est possible, par le même procédé, d'élaborer des graves hydrauliques, notamment pour la réalisation de terrassements ou de sous bassements de chaussées. It is possible, by the same process, to develop hydraulic gravels, in particular for the realization of earthworks or underpasses of roadways.
Mais les granulats élaborés selon ce procédé à partir de laitiers de conversion d'acier à l'oxygène ont généralement tendance à gonfler sous l'effet de l'humidité, ce qui les rend impropres à la préparation de béton, d'enrobés ou de graves. However, the aggregates produced according to this process from slag from conversion of steel to oxygen generally tend to swell under the effect of humidity, which makes them unsuitable for the preparation of concrete, mixes or serious.
Ces laitiers de conversion d'acier à l'oxygène sont généralement désignés sous l'appellation de laitiers L.D. (Linz-Donovitz). These oxygen steel conversion slags are generally designated under the name of slag L.D. (Linz-Donovitz).
Le document FR 2 630 432 décrit cependant une composition de béton hydraulique incorporant du laitier L.D. et ne présentant pas cet inconvénient de gonflement. Document FR 2 630 432 describes however a hydraulic concrete composition incorporating slag L.D. and not having this swelling drawback.
Ce résultat est atteint en concassant le laitier L.D. à une granulométrie assez fine pour passer à la maille de 2 mm, en limitant fortement sa proportion à 18% au maximum dans la composition de béton, et en dosant soigneusement un additif riche en alumine et pauvre en alcalino-terreux à rajouter à la composition. This result is achieved by crushing the slag LD to a particle size fine enough to pass to the mesh of 2 mm, by strongly limiting its proportion to 18% at most in the concrete composition, and by carefully dosing an additive rich in alumina and poor in alkaline earth to add to the composition.
Mais ces contraintes de préparation du granulat et de composition du béton sont coûteuses et restreignent les débouchés des laitiers L.D. However, these constraints in terms of preparation of the aggregate and composition of the concrete are costly and limit the outlets for L.D.
Le document FR 2 481 264 décrit également une composition de revêtement incorporant du laitier L.D. (et très peu de chaux) et ne présentant pas cet inconvénient de gonflement. Document FR 2 481 264 also describes a coating composition incorporating slag L.D. (and very little lime) and does not have this swelling drawback.
Mais ce résultat est également atteint au prix de nouvelles contraintes de composition. But this result is also achieved at the cost of new composition constraints.
Pour réduire les risques de gonflement des ouvrages de génie civil réalisés à partir de laitiers L.D., on a également proposé, après concassage, de les stocker à l'air libre pendant des périodes de plusieurs mois. To reduce the risks of swelling of civil engineering works produced from L.D. slag, it has also been proposed, after crushing, to store them in the open air for periods of several months.
Mais ce stockage prolongé reste une opération coûteuse qui, de surcroît, ne résout qu'imparfaitement le problème du gonflement. But this prolonged storage remains a costly operation which, moreover, only imperfectly solves the problem of swelling.
L'invention a pour but de maîtriser le risque de gonflement d'un granulat à base de laitier L.D. sans nécessité de stockage prolongé ni contraintes particulières à l'utilisation en génie civil, notamment pour la préparation d'un béton, d'une composition de revêtement ou d'une grave hydraulique. The object of the invention is to control the risk of swelling of an LD slag-based aggregate without the need for prolonged storage or particular constraints for use in civil engineering, in particular for the preparation of a concrete, of a composition. coating or serious hydraulics.
A cet effet, I'invention a pour objet un procédé de préparation de granulats, notamment pour utilisation en génie civil, à partir de laitier d'aciérie de conversion à l'oxygène, dans lequel on prépare physiquement ledit laitier pour obtenir la granulométrie requise pour ladite utilisation, notamment par concassage, criblage et séparations en fractions granulométriques, caractérisé en ce que on traite ensuite le laitier ainsi préparé sous une atmosphère enrichie en gaz carbonique. To this end, the invention relates to a process for the preparation of aggregates, in particular for use in civil engineering, from slag from an oxygen conversion steelworks, in which said slag is physically prepared to obtain the required particle size for said use, in particular by crushing, screening and separation into particle size fractions, characterized in that the slag thus prepared is then treated under an atmosphere enriched in carbon dioxide.
De préférence, la teneur en gaz carbonique de ladite atmosphère est supérieure à 5 %. Preferably, the carbon dioxide content of said atmosphere is greater than 5%.
L'invention a également pour objet une composition de béton hydraulique contenant une proportion de laitier d'aciérie de conversion à l'oxygène supérieure à 18% en poids. The invention also relates to a hydraulic concrete composition containing a proportion of slag from oxygen conversion steelworks greater than 18% by weight.
L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée à titre d'exemple. The invention will be better understood on reading the description which follows, given by way of example.
Dans une installation classique de traitement physique, on concasse du laitier L.D., on le crible et on sépare le produit obtenu en différentes fractions granulométriques ; d'une manière connue en elle-même, le traitement physique est adapté aux utilisations visées du laitier comme granulat. In a conventional physical processing installation, the slag L.D. is crushed, it is screened and the product obtained is separated into different particle size fractions; in a manner known in itself, the physical treatment is adapted to the intended uses of the slag as an aggregate.
A la sortie de l'installation de traitement physique, immédiatement ou en différé, on fait défiler le produit obtenu dans une enceinte confinée de traitement. At the exit from the physical treatment installation, immediately or deferred, the product obtained is passed through a confined treatment enclosure.
Ladite enceinte de traitement peut se présenter sous la forme d'un tunnel ventilé et traversé par un tapis roulant de transfert du produit à traiter
On fait défiler le produit dans le tunnel tout en le ventilant par un gaz de traitement, qui, selon l'invention, est un gaz enrichi en gaz carbonique, par rapport à la teneur normale de l'air. Said treatment enclosure may be in the form of a ventilated tunnel and crossed by a conveyor belt for transferring the product to be treated
The product is passed through the tunnel while ventilating it with a treatment gas, which, according to the invention, is a gas enriched in carbon dioxide, compared to the normal content of air.
Selon l'invention, la carbonatation du produit entraîne la formation d'une croûte d'imperméabilisation à la surface des grains. According to the invention, the carbonation of the product results in the formation of a waterproofing crust on the surface of the grains.
On veillera donc à ne pas re-broyer les granulats après le traitement de carbonatation de façon à ne pas rompre la croûte de protection. Care should therefore be taken not to re-grind the aggregates after the carbonation treatment so as not to break the protective crust.
De préférence, la teneur en gaz carbonique du gaz de traitement est supérieure à 5 %. Preferably, the carbon dioxide content of the treatment gas is greater than 5%.
On détermine la durée minimale de traitement sous atmosphère enrichie en gaz carbonique, par exemple par une étude préalable en laboratoire sur des échantillons de produit issu du traitement physique. The minimum duration of treatment under an atmosphere enriched in carbon dioxide is determined, for example by a prior study in the laboratory on samples of product resulting from physical treatment.
L'étude préalable en laboratoire peut notamment se baser sur des tests de gonflement. The preliminary study in the laboratory can in particular be based on swelling tests.
On considère par exemple que la durée minimale de traitement sous atmosphère enrichie en gaz carbonique est atteinte lorsque la porosité ouverte des échantillons à la vapeur d'eau est inférieure à un seuil prédéterminé. It is considered, for example, that the minimum duration of treatment under an atmosphere enriched in carbon dioxide is reached when the open porosity of the samples with water vapor is less than a predetermined threshold.
On détermine le seuil de porosité maximum admissible par des tests de gonflement adaptés à l'utilisation prévue des granulats. The maximum permissible porosity threshold is determined by swelling tests suited to the intended use of the aggregates.
Avantageusement, le gaz de traitement est un gaz de combustion, récupéré à la sortie d'installations de brûlage ou de chaudières proches de l'enceinte de traitement. Advantageously, the treatment gas is a combustion gas, recovered at the outlet of burning installations or boilers close to the treatment enclosure.
Avantageusement, le gaz de traitement est chaud et/ou contient également de la vapeur d'eau. Advantageously, the treatment gas is hot and / or also contains water vapor.
Sans se départir de l'invention, d'autres installations classiques peuvent être envisagées pour traiter le produit sous une atmosphère enrichie en gaz carbonique. Without departing from the invention, other conventional installations can be envisaged for treating the product under an atmosphere enriched in carbon dioxide.
Selon une variante de l'invention, une partie de l'installation de traitement physique du laitier est confinée dans une enceinte où l'on fait circuler ledit gaz de traitement ; de préférence, cette partie confinée est située en aval dans l'installation de traitement. According to a variant of the invention, part of the physical slag treatment installation is confined in an enclosure where said treatment gas is circulated; preferably, this confined part is located downstream in the treatment installation.
Selon cette variante, il n'est plus nécessaire de traiter le produit à la sortie de l'installation de traitement physique. According to this variant, it is no longer necessary to treat the product at the outlet of the physical treatment installation.
Ainsi, grâce au procédé de préparation de granulats selon l'invention qui comporte un confinement sous une atmosphère enrichie en gaz carbonique, et contenant de préférence de la vapeur d'eau, on stabilise les granulats et on maîtrise le risque de gonflement des matériaux incorporant ces granulats, alors que pourtant ils proviennent de laitiers L.D. Thus, thanks to the method for preparing aggregates according to the invention which comprises confinement under an atmosphere enriched in carbon dioxide, and preferably containing water vapor, the aggregates are stabilized and the risk of swelling of the materials incorporating is controlled. these aggregates, even though they come from LD slag
Par rapport aux solutions de l'art antérieur pour limiter ces risques de gonflement, I'invention apporte une solution économique et plus efficace contre le risque de gonflement. Compared with the solutions of the prior art to limit these risks of swelling, the invention provides an economical and more effective solution against the risk of swelling.
Selon l'invention, il n'y pas de limite supérieure, d'une part à la taille du granulat à base de laitier L.D., d'autre part à sa proportion dans la composition de béton. According to the invention, there is no upper limit, on the one hand to the size of the granule based on slag L.D., on the other hand to its proportion in the concrete composition.
On sait en effet que dans le cas de granulats préparés à partir de laitiers L.D. et des matériaux qui les intègrent, c'est l'hydratation lente de la chaux interne aux granulats qui provoque le gonflement des matériaux, sous l'effet de la vapeur d'eau qui y pénètre par des pores ouverts en surface. It is known in fact that in the case of aggregates prepared from LD slags and the materials which integrate them, it is the slow hydration of the lime internal to the aggregates which causes the materials to swell, under the effect of the vapor. of water entering it through open pores on the surface.
Grâce au procédé selon l'invention, on obtient un granulat à base de laitier L.D. formé de particules dont la surface présente une imperméabilité élevée à la vapeur d'eau, ce qui permet de maîtriser le risque de gonflement quelle que soit la taille des grains. Thanks to the process according to the invention, an LD slag-based aggregate formed of particles is obtained, the surface of which has a high impermeability to water vapor, which makes it possible to control the risk of swelling whatever the size of the grains. .
Contrairement aux granulats à base de laitiers L.D. de l'art antérieur, il devient alors possible selon l'invention de préparer des granulats de laitier
L.D. de grosse granulométrie, qui présentent de bonnes caractéristiques de stabilité dimensionnelle (maîtrise du gonflement) alors même qu'ils ne passeraient pas à la maille de 2 mm.Contrary to the LD dairy aggregates of the prior art, it then becomes possible according to the invention to prepare dairy aggregates
LD of large grain size, which have good dimensional stability characteristics (control of swelling) even though they would not pass through the 2 mm mesh.
Grâce au procédé selon l'invention, on peut aussi préparer des compositions de bétons contenant une proportion pondérale de laitier L.D. Thanks to the process according to the invention, it is also possible to prepare concrete compositions containing a proportion by weight of slag L.D.
supérieure à 18% sans risque de gonflement.greater than 18% without risk of swelling.
L'invention ouvre donc de nouveaux débouchés aux laitiers de conversion d'acier à l'oxygène dans le domaine du génie civil et contribue à une amélioration de l'environnement en diminuant les stocks, voire les décharges, de ce type de laitiers. The invention therefore opens new outlets for slag converting steel to oxygen in the field of civil engineering and contributes to an improvement of the environment by reducing the stocks, or even the discharges, of this type of slag.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9507549A FR2735767B1 (en) | 1995-06-23 | 1995-06-23 | PROCESS FOR PREPARING AGGREGATES, ESPECIALLY FOR USE IN CIVIL ENGINEERING, FROM DAIRY STEEL CONVERSION WITH OXYGEN |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9507549A FR2735767B1 (en) | 1995-06-23 | 1995-06-23 | PROCESS FOR PREPARING AGGREGATES, ESPECIALLY FOR USE IN CIVIL ENGINEERING, FROM DAIRY STEEL CONVERSION WITH OXYGEN |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2735767A1 true FR2735767A1 (en) | 1996-12-27 |
| FR2735767B1 FR2735767B1 (en) | 1997-07-18 |
Family
ID=9480323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9507549A Expired - Fee Related FR2735767B1 (en) | 1995-06-23 | 1995-06-23 | PROCESS FOR PREPARING AGGREGATES, ESPECIALLY FOR USE IN CIVIL ENGINEERING, FROM DAIRY STEEL CONVERSION WITH OXYGEN |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2735767B1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1630143A1 (en) * | 2003-06-09 | 2006-03-01 | Nippon Steel Corporation | Method for stabilization treatment of steel making slag, stabilized steel making slag, and material and method for environmental preservation of water area using said slag |
| EP3842399A1 (en) | 2019-12-24 | 2021-06-30 | Orbix Solutions | Method for producing an alkaline aggregate |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4884080A (en) * | 1972-02-12 | 1973-11-08 | ||
| JPS5039676A (en) * | 1973-08-15 | 1975-04-11 | ||
| JPS5041772A (en) * | 1973-08-20 | 1975-04-16 | ||
| JPS52140535A (en) * | 1976-05-20 | 1977-11-24 | Kawatetsu Kogyo Kk | Method of manufacturing molded products by carbonating mixture of converter slag and portland cement |
| JPS54127895A (en) * | 1978-03-29 | 1979-10-04 | Nippon Steel Corp | Prevention of solidification of water-granulated slag |
| JPS5537466A (en) * | 1978-09-09 | 1980-03-15 | Matsushita Electric Works Ltd | Raw material and production of inorganic cured body |
| JPS5658913A (en) * | 1979-10-17 | 1981-05-22 | Nippon Steel Corp | Stable converter slag powder and its production |
| SU1084321A1 (en) * | 1983-01-11 | 1984-04-07 | Днепропетровский Ордена Трудового Красного Знамени Металлургический Институт | Method for producing blocks of highly-basic manganese slags by carbonization |
| FR2630432A1 (en) * | 1988-04-25 | 1989-10-27 | Setec Geotechnique | Hydraulic concrete composition based on oxygen steel slag |
| JPH03279240A (en) * | 1990-03-29 | 1991-12-10 | Nippon Steel Chem Co Ltd | Ultra-fine powder of granulated slag, production thereof and mortar composition |
| FR2668474A1 (en) * | 1990-10-31 | 1992-04-30 | Lorraine Laminage | PROCESS AND PLANT FOR TREATING HIGH - FURNACE VITRIFIED DAIRY PRODUCTS AND PRODUCTS OBTAINED THEREBY. |
| JPH04317444A (en) * | 1991-02-21 | 1992-11-09 | Nippon Steel Chem Co Ltd | Superfine granulated slag power, its production and mortar composition |
| JPH0692696A (en) * | 1992-09-07 | 1994-04-05 | Kawasaki Steel Corp | Method for modifying slag of steel manufacture |
| JPH06206743A (en) * | 1993-01-08 | 1994-07-26 | Kawasaki Steel Corp | Modification of steel-making slag |
-
1995
- 1995-06-23 FR FR9507549A patent/FR2735767B1/en not_active Expired - Fee Related
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4884080A (en) * | 1972-02-12 | 1973-11-08 | ||
| JPS5039676A (en) * | 1973-08-15 | 1975-04-11 | ||
| JPS5041772A (en) * | 1973-08-20 | 1975-04-16 | ||
| JPS52140535A (en) * | 1976-05-20 | 1977-11-24 | Kawatetsu Kogyo Kk | Method of manufacturing molded products by carbonating mixture of converter slag and portland cement |
| JPS54127895A (en) * | 1978-03-29 | 1979-10-04 | Nippon Steel Corp | Prevention of solidification of water-granulated slag |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1630143A1 (en) * | 2003-06-09 | 2006-03-01 | Nippon Steel Corporation | Method for stabilization treatment of steel making slag, stabilized steel making slag, and material and method for environmental preservation of water area using said slag |
| EP1630143A4 (en) * | 2003-06-09 | 2011-06-29 | Nippon Steel Corp | Method for stabilization treatment of steel making slag, stabilized steel making slag, and material and method for environmental preservation of water area using said slag |
| EP3842399A1 (en) | 2019-12-24 | 2021-06-30 | Orbix Solutions | Method for producing an alkaline aggregate |
| BE1027914A1 (en) | 2019-12-24 | 2021-07-16 | Orbix Productions | PROCESS FOR THE PRODUCTION OF AN ALKALINE AGGREGATE |
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|---|---|
| FR2735767B1 (en) | 1997-07-18 |
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