BE886151A - PROCESS FOR THE RECOVERY OF HAUT FOURNEAU DAIRY - Google Patents
PROCESS FOR THE RECOVERY OF HAUT FOURNEAU DAIRY Download PDFInfo
- Publication number
- BE886151A BE886151A BE6/47316A BE6047316A BE886151A BE 886151 A BE886151 A BE 886151A BE 6/47316 A BE6/47316 A BE 6/47316A BE 6047316 A BE6047316 A BE 6047316A BE 886151 A BE886151 A BE 886151A
- Authority
- BE
- Belgium
- Prior art keywords
- slag
- emi
- gas
- subjected
- hydrogen
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 20
- 235000013365 dairy product Nutrition 0.000 title 1
- 238000011084 recovery Methods 0.000 title 1
- FIAFUQMPZJWCLV-UHFFFAOYSA-N suramin Chemical compound OS(=O)(=O)C1=CC(S(O)(=O)=O)=C2C(NC(=O)C3=CC=C(C(=C3)NC(=O)C=3C=C(NC(=O)NC=4C=C(C=CC=4)C(=O)NC=4C(=CC=C(C=4)C(=O)NC=4C5=C(C=C(C=C5C(=CC=4)S(O)(=O)=O)S(O)(=O)=O)S(O)(=O)=O)C)C=CC=3)C)=CC=C(S(O)(=O)=O)C2=C1 FIAFUQMPZJWCLV-UHFFFAOYSA-N 0.000 title 1
- 239000002893 slag Substances 0.000 claims description 32
- 239000007789 gas Substances 0.000 claims description 10
- 238000005469 granulation Methods 0.000 claims description 8
- 230000003179 granulation Effects 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 5
- 230000001590 oxidative effect Effects 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 230000004907 flux Effects 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims description 2
- 238000003379 elimination reaction Methods 0.000 claims description 2
- 239000003345 natural gas Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims 2
- 238000006477 desulfuration reaction Methods 0.000 claims 2
- 230000023556 desulfurization Effects 0.000 claims 2
- 150000001768 cations Chemical class 0.000 claims 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims 1
- 239000007800 oxidant agent Substances 0.000 claims 1
- 229910000029 sodium carbonate Inorganic materials 0.000 claims 1
- 235000017550 sodium carbonate Nutrition 0.000 claims 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 10
- 229910052717 sulfur Inorganic materials 0.000 description 10
- 239000011593 sulfur Substances 0.000 description 10
- 239000004568 cement Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000005987 sulfurization reaction Methods 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
- 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
- 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
- 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)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Structural Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Description
Procédé de valorisation du laitier de haut fourneau.
La présente invention se rapporte à un procédé de valorisation du laitier de haut fourneau.
Celui-ci est habituellement utilisé pour la construction d'infrastructures routières ainsi que dans les cimenteries, comme élément intervenant dans la fabrication du ciment.
Le but de la présente invention est de trouver une application nouvelle, permettant de valoriser davantage le laitier de haut fourneau.
Spécifiquement, cette application se trouve dans le domaine de la verrerie.
-,On sait que le laitier usuel de haut fourneau contient en moyenne de 1 à 1,5 % de soufre, mais cette teneur est très variable, ce qui constitue un inconvénient important pour son utilisation, précisément dans le domaine de la verrerie.
Pour remédier à cet inconvénient, il faudrait disposer d'un laitier dont la teneur en soufre serait non seulement plus faible
(par exemple de l'ordre de 0,7 %), mais également sensiblement plus régulière.
C'est précisément ce qu'a recherché et trouvé l' auteur de la présente invention, à savoir un procédé économique permettant d'abaisser rapidement et de rendre nettement plus régulière, la teneur en soufre de tels laitiers, jusqu'à des valeurs permettant son utilisation dansle domaine de la verrerie.
Le procédé, objet de la présente invention, est essentiellement caractérisé en ce que le laitier de haut fourneau
<EMI ID=1.1>
que réagissant avec le soufre contenu dans le laitier, de manière à former un produit gazeux s'échappant facilement.
Suivant une première variante du procédé de l'invention, le laitier à l'état liquide et contenu dans un récipient approprié, est soumis à l'action pouvant être continue, d'un gaz oxydant, tel que de l'oxygène pur, qui lui est injecté par exemple au moyen de tuyères ou d'une lance. On peut notamment faire usage' de tuyères à deux conduits concentriques, disposées dans le récipient, scus le niveau du laitier liquide. Dans cette variante, le soufre du laitier s'allie à l'oxygène et se dégage sous forme de
<EMI ID=2.1>
<EMI ID=3.1> l'état liquide est soumise à l'action d'hydrogène et de préférence, d'un porteur d'hydrogène, par exemple du gaz naturel,. qui,
<EMI ID=4.1>
<EMI ID=5.1>
Avantageusement, on peut ajouter au laitier des
<EMI ID=6.1>
<EMI ID=7.1>
et de réaliser les réactions susmentionnées, à ces températures.
Après la réaction de combinaison du gaz avec le soufre et élimination du produit sulfuré, ou porteur de soufre,
le laitier est'soumis à une opération de granulation, par exemple en le versant dans de l'eau. Cette granulation peut toutefois être précédée d'un brassage au moyen d'un gaz neutre (par exemple du C02 ou de l'azote), pour éliminer les impuretés carbonées: éventuellement présentes dans le dit laitier.
Il ne sort pas du domaine de l'invention, de granuler le laitier avant de le dé-sulfurer. Dans ce dernier cas, après granulation, le laitier est broyé de façon à être réduit en poudre, puis soumis après mélange éventuel avec des fondants, à l'action par exemple en continu, et dans une enceinte appropriée, d'un gaz oxydant ou porteur d'hydrogène. Le laitier pulvérisé
peut être préchauffé, par exemple à une température comprise en- tre 600[deg.]C et 800[deg.]C de même que le gaz réagissant avec le dit laitier.
A l'expérience, il a été constaté que le procédé
de l'invention périclitait d'obtenir un produit à teneur en soufre
<EMI ID=8.1>
sible dans le domaine de la verrerie.
Il n'est pas inutile de noter ici que le même procédé peut .également servir en cimenterie, car on peut facilement amener le laitier à des teneurs en soufre très inférieures à 0,1 %, ce qui est particulièrement intéressant dans ce domaine.
REVENDICATIONS
1. Procédé de valorisation du laitier de.haut four-
<EMI ID=9.1>
constituant chimique réagissant avec le soufre contenu dans le laitier, de manière à former un produit sulfureux pouvant s'échapper.
Process for upgrading blast furnace slag.
The present invention relates to a process for upgrading blast furnace slag.
This is usually used for the construction of road infrastructure as well as in cement factories, as an element involved in the manufacture of cement.
The object of the present invention is to find a new application, making it possible to further enhance the blast furnace slag.
Specifically, this application is found in the field of glassware.
-, It is known that the usual blast furnace slag contains on average from 1 to 1.5% of sulfur, but this content is very variable, which constitutes a significant drawback for its use, precisely in the field of glassware.
To remedy this drawback, it would be necessary to have a slag whose sulfur content would not only be lower
(for example of the order of 0.7%), but also significantly more regular.
This is precisely what the author of the present invention has sought and found, namely an economical process allowing the sulfur content of such slags to be rapidly reduced and made much more regular, up to values allowing its use in the field of glassware.
The process which is the subject of the present invention is essentially characterized in that the blast furnace slag
<EMI ID = 1.1>
only reacting with the sulfur contained in the slag, so as to form a gaseous product escaping easily.
According to a first variant of the process of the invention, the slag in the liquid state and contained in a suitable container, is subjected to the action which can be continuous, of an oxidizing gas, such as pure oxygen, which it is injected for example by means of nozzles or a lance. One can in particular make use of nozzles with two concentric conduits, arranged in the container, above the level of the liquid slag. In this variant, the slag sulfur combines with oxygen and is released in the form of
<EMI ID = 2.1>
<EMI ID = 3.1> the liquid state is subjected to the action of hydrogen and preferably of a hydrogen carrier, for example natural gas. who,
<EMI ID = 4.1>
<EMI ID = 5.1>
Advantageously, it is possible to add to the slag
<EMI ID = 6.1>
<EMI ID = 7.1>
and to carry out the above-mentioned reactions, at these temperatures.
After the reaction of combining the gas with the sulfur and elimination of the sulfurized product, or carrier of sulfur,
the slag is subjected to a granulation operation, for example by pouring it into water. This granulation can however be preceded by stirring by means of a neutral gas (for example CO 2 or nitrogen), in order to remove the carbonaceous impurities: possibly present in the said slag.
It is not outside the scope of the invention to granulate the slag before desulfurizing it. In the latter case, after granulation, the slag is ground so as to be reduced to powder, then subjected after possible mixing with fluxes, to the action, for example continuously, and in an appropriate enclosure, of an oxidizing gas or hydrogen carrier. The sprayed slag
can be preheated, for example to a temperature between 600 [deg.] C and 800 [deg.] C as well as the gas reacting with said slag.
Experience has shown that the process
of the invention failed to obtain a product with sulfur content
<EMI ID = 8.1>
sible in the field of glassware.
It is useful to note here that the same process can also be used in cement works, since the slag can easily be brought to sulfur contents much lower than 0.1%, which is particularly advantageous in this field.
CLAIMS
1. Process for upgrading slag from the top oven
<EMI ID = 9.1>
chemical constituent reacting with the sulfur contained in the slag, so as to form a sulfurous product which can escape.
Claims (1)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE6/47316A BE886151A (en) | 1980-11-13 | 1980-11-13 | PROCESS FOR THE RECOVERY OF HAUT FOURNEAU DAIRY |
LU83747A LU83747A1 (en) | 1980-11-13 | 1981-11-12 | PROCESS FOR THE RECOVERY OF HAUT FOURNEAU DAIRY |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE6/47316A BE886151A (en) | 1980-11-13 | 1980-11-13 | PROCESS FOR THE RECOVERY OF HAUT FOURNEAU DAIRY |
BE886151 | 1980-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
BE886151A true BE886151A (en) | 1981-03-02 |
Family
ID=25659407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE6/47316A BE886151A (en) | 1980-11-13 | 1980-11-13 | PROCESS FOR THE RECOVERY OF HAUT FOURNEAU DAIRY |
Country Status (1)
Country | Link |
---|---|
BE (1) | BE886151A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2610616A1 (en) * | 1987-02-11 | 1988-08-12 | Mendelsohn Natie | Processes and materials for improving the qualities of silico-calcic slags |
WO2001042159A1 (en) * | 1999-12-07 | 2001-06-14 | Holderbank Financiere Glarus Ag | Method for crushing slack with simultaneous desulphurisation and subsequent dechroming |
-
1980
- 1980-11-13 BE BE6/47316A patent/BE886151A/en not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2610616A1 (en) * | 1987-02-11 | 1988-08-12 | Mendelsohn Natie | Processes and materials for improving the qualities of silico-calcic slags |
WO2001042159A1 (en) * | 1999-12-07 | 2001-06-14 | Holderbank Financiere Glarus Ag | Method for crushing slack with simultaneous desulphurisation and subsequent dechroming |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
RE | Patent lapsed |
Owner name: CENTRE DE RECHERCHES METALLURGIQUES - CENTRUM VOO Effective date: 19851130 |