BE830140A - PROCESS FOR THE USE OF METALLURGIC SLAG - Google Patents
PROCESS FOR THE USE OF METALLURGIC SLAGInfo
- Publication number
- BE830140A BE830140A BE6045044A BE6045044A BE830140A BE 830140 A BE830140 A BE 830140A BE 6045044 A BE6045044 A BE 6045044A BE 6045044 A BE6045044 A BE 6045044A BE 830140 A BE830140 A BE 830140A
- Authority
- BE
- Belgium
- Prior art keywords
- slag
- alumina
- silica
- emi
- liquid
- Prior art date
Links
- 239000002893 slag Substances 0.000 title claims description 27
- 238000000034 method Methods 0.000 title claims description 14
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 9
- 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
- 239000011398 Portland cement Substances 0.000 claims description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 239000000377 silicon dioxide Substances 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000000969 carrier Substances 0.000 claims description 4
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 229910001021 Ferroalloy Inorganic materials 0.000 claims description 2
- 238000007792 addition Methods 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 239000011449 brick Substances 0.000 claims description 2
- 229910052710 silicon Inorganic materials 0.000 claims description 2
- 239000010703 silicon Substances 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- 239000002699 waste material Substances 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000007670 refining Methods 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 229910052595 hematite Inorganic materials 0.000 description 3
- 239000011019 hematite Substances 0.000 description 3
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B3/00—General features in the manufacture of pig-iron
- C21B3/04—Recovery of by-products, e.g. slag
- C21B3/06—Treatment of liquid 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/36—Processes yielding slags of special composition
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2400/00—Treatment of slags originating from iron or steel processes
- C21B2400/02—Physical or chemical treatment of slags
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Structural Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
"Procédé pour l'utilisation de scorie métallurgique".
La présente invention se rapporte à un procédé pour l'utilisation d'une scorie métallurgique, applicable spécialement aux scories provenant de l'affinage d'une fonte hématite dans un convertisseur à soufflage d'oxygène.
Les scories métallurgiques produites par l'affinage d'une fonte non phosphoreuse.selon .le procédé dans lequel on souffle de l'oxygène industriellement pur dans le convertisseur, ne trouvent actuellement que des débouchés très limités, largement inférieurs aux quantités disponibles.
Ces-débouchés sont essentiellement, soit l'agronomie, où, à cause de sa teneur importante en CaO, cette scorie
<EMI ID=1.1>
la remise au haut fourneau, malgré les frais de broyage et de refusion assez grands qui rendent l'opération économiquement peu intéressante. Le surplus important de scorie non utilisée est
en général mis au terril, solution qui présente encore l'inconvénient de nécessiter des dépenses en pure perte, puisque le matériau est considéré comme irrécupérable.
La présente invention a précisément pour objet un procédé de traitement de ces scories provenant de l'affinage à l'oxygène des fontes hématites, qui permet d'en récupérer la plus grande partie, sinon la quasi totalité.
L'idée de base, sur laquelle s'appuie le procédé de l'invention, consiste à considérer la dite scorie comme un minerai pauvre en fer et à la traiter lorsqu'elle est encore à l'état liquide au sortir du convertisseur.
Rappelons ici qu'une scorie de ce genre contient
<EMI ID=2.1>
de 2 à 4 % de MnO, avec un peu de MgO et de P205 et présente à la sortie du convertisseur une température généralement comprise
<EMI ID=3.1>
Suivant l'invention, le procédé consiste à ajouter à une scorie liquide provenant de l'affinage à l'oxygène d'une fonte non phosphoreuse, d'une part un réducteur suffisamment
<EMI ID=4.1>
état métallique et d'autre part, des porteurs d'alumine et/ou de silice qui confèrent à la dite scorie une composition voisine de celles que l'on rencontre habituellement pour les ciments Portland (une composition type d'un tel ciment Portland est donnée par les valeurs ci-après : 43 à 47 % CaO; 10 à 13 % si-[deg.]2 ;
<EMI ID=5.1>
De cette façon, on transforme la scorie initiale d'une part, en un produit métallique à base de fer, qui peut <EMI ID=6.1>
ter la charge et d'autre part, en un.produit analogue aux ciments Portland qui: bénéficient de débouchés importants et bien connus.
<EMI ID=7.1>
<EMI ID=8.1>
scorie à l'état liquide des déchets de briques réfractaires comme porteurs d'alumine et/ou de silice.
<EMI ID=9.1>
�
cédé ci-dessus est conduit dans un récipient, dans lequel la scorie et ses additions sont susceptibles d'être brassées, et dont le revêtement réfractaire intérieur présente une composition telle que son usure procure à la scorie de départ les éléments porteurs d'alumine ou de silice nécessaires pour sa transformation en ciment Portland. En cas de nécessité, il suffit de recharger régulièrement le récipient en un réfractaire de même composition, afin de pallier cette usure du revêtement.
Egalement suivant l'invention, au cours du traitement de la scorie par un réducteur tel que le carbone, on insuffle de l'oxygène dans l'atmosphère gazeuse se dégageant de la
<EMI ID=10.1>
maintenir le dit bain à une température suffisante pour qu'il reste liquide.
Cette variante présente l'avantage que la scorie ayant été soumise à l'action de l'oxygène, est de ce fait débarrassée de son soufre, ce qui permet de se servir de la dite scorie, pour exercer une action désulfurante sur de la fonte liquide, par exemple avant son enfournement au convertisseur.
Suivant une variante avantageuse du procédé cidessus, une partie du carbone est remplacée par de l'aluminium ou du silicium à l'état pur ou sous forme de ferroalliages, ce qui permet un apport important de calories au bain, pour le maintenir liquide.
REVENDICATIONS
1. Procédé pour l'utilisation d'une scorie métallurgique provenant de l'affinage à l'oxygène d'une fonte hématite, caractérisé en ce que l'on ajoute à la dite scorie à l'état liquide, d'une part un réducteur suffisamment énergique pour réduire la majeure partie du FeO et du MnO à l'état métallique et d'autre part, des porteurs d'alumine et/ou de silice qui confèrent à la dite scorie une composition voisine de celles que l'on rencontre habituellement pour les ciments Portland.
"Method for the use of metallurgical slag".
The present invention relates to a process for the use of a metallurgical slag, especially applicable to slags from the refining of a hematite iron in an oxygen blast converter.
The metallurgical slag produced by the refining of a non-phosphorous cast iron. According to the process in which industrially pure oxygen is blown into the converter, currently only find very limited outlets, much lower than the quantities available.
These outlets are essentially, either agronomy, where, because of its high CaO content, this slag
<EMI ID = 1.1>
delivery to the blast furnace, despite the fairly large grinding and remelting costs which make the operation unattractive economically. The large surplus of unused slag is
generally put in the slag heap, a solution which still has the drawback of requiring wasted expenditure, since the material is considered irrecoverable.
The present invention specifically relates to a process for treating these slags originating from the oxygen refining of hematite melts, which makes it possible to recover most of them, if not almost all of them.
The basic idea, on which the process of the invention is based, consists in considering the said slag as an ore poor in iron and in treating it when it is still in the liquid state on leaving the converter.
Let us recall here that a slag of this kind contains
<EMI ID = 2.1>
from 2 to 4% of MnO, with a little MgO and P205 and presents at the output of the converter a temperature generally included
<EMI ID = 3.1>
According to the invention, the process consists in adding to a liquid slag originating from the oxygen refining of a non-phosphorous iron, on the one hand a sufficiently reducing agent.
<EMI ID = 4.1>
metallic state and on the other hand, carriers of alumina and / or silica which give said slag a composition similar to those usually found for Portland cements (a typical composition of such a Portland cement is given by the following values: 43 to 47% CaO; 10 to 13% si- [deg.] 2;
<EMI ID = 5.1>
In this way, we transform the initial slag on the one hand, into an iron-based metal product, which can <EMI ID = 6.1>
ter the load and on the other hand, in a product similar to Portland cements which: benefit from important and well-known outlets.
<EMI ID = 7.1>
<EMI ID = 8.1>
slag in the liquid state of refractory brick waste as carriers of alumina and / or silica.
<EMI ID = 9.1>
�
ceded above is conducted in a receptacle, in which the slag and its additions are capable of being stirred, and of which the internal refractory lining has a composition such that its wear provides the starting slag with the elements carrying alumina or of silica necessary for its transformation into Portland cement. If necessary, it is sufficient to regularly top up the container with a refractory of the same composition, in order to compensate for this wear of the coating.
Also according to the invention, during the treatment of the slag with a reducing agent such as carbon, oxygen is blown into the gaseous atmosphere emerging from the gas.
<EMI ID = 10.1>
maintaining said bath at a temperature sufficient for it to remain liquid.
This variant has the advantage that the slag having been subjected to the action of oxygen, is thereby freed of its sulfur, which makes it possible to use said slag, to exert a desulfurizing action on the cast iron. liquid, for example before it is placed in the converter.
According to an advantageous variant of the above process, part of the carbon is replaced by aluminum or silicon in the pure state or in the form of ferroalloys, which allows a large supply of calories to the bath, to keep it liquid.
CLAIMS
1. Process for the use of a metallurgical slag originating from the oxygen refining of a hematite cast iron, characterized in that one adds to said slag in the liquid state, on the one hand a sufficiently energetic reducing agent to reduce the major part of FeO and MnO in the metallic state and on the other hand, alumina and / or silica carriers which give said slag a composition similar to those which are encountered usually for Portland cements.
Claims (1)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE6045044A BE830140A (en) | 1975-06-11 | 1975-06-11 | PROCESS FOR THE USE OF METALLURGIC SLAG |
LU75130A LU75130A1 (en) | 1975-06-11 | 1976-06-09 | |
BE6/47406A BE887646R (en) | 1975-06-11 | 1980-02-23 | METHOD OF USING METALLURGICAL SLAG |
LU83921A LU83921A1 (en) | 1975-06-11 | 1982-02-03 | METHOD OF USING METALLURGICAL SLAG |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE6045044A BE830140A (en) | 1975-06-11 | 1975-06-11 | PROCESS FOR THE USE OF METALLURGIC SLAG |
Publications (1)
Publication Number | Publication Date |
---|---|
BE830140A true BE830140A (en) | 1975-10-01 |
Family
ID=3874631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE6045044A BE830140A (en) | 1975-06-11 | 1975-06-11 | PROCESS FOR THE USE OF METALLURGIC SLAG |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE830140A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1586666A1 (en) * | 2004-04-13 | 2005-10-19 | Paul Wurth S.A. | Method of valorizing a steel slag |
-
1975
- 1975-06-11 BE BE6045044A patent/BE830140A/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1586666A1 (en) * | 2004-04-13 | 2005-10-19 | Paul Wurth S.A. | Method of valorizing a steel slag |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: CENTRE DE RECHERCHS METALLURGIQUES A.S.B.L.- CEN Effective date: 19880630 |