CA2290068A1 - Dense slag-deoxidizing briquette - Google Patents
Dense slag-deoxidizing briquette Download PDFInfo
- Publication number
- CA2290068A1 CA2290068A1 CA 2290068 CA2290068A CA2290068A1 CA 2290068 A1 CA2290068 A1 CA 2290068A1 CA 2290068 CA2290068 CA 2290068 CA 2290068 A CA2290068 A CA 2290068A CA 2290068 A1 CA2290068 A1 CA 2290068A1
- Authority
- CA
- Canada
- Prior art keywords
- weight
- briquette
- deoxidizing
- binder
- aluminum
- 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.)
- Abandoned
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- 239000004484 Briquette Substances 0.000 title claims abstract description 43
- 239000002893 slag Substances 0.000 claims abstract description 41
- 239000011230 binding agent Substances 0.000 claims abstract description 30
- 239000012256 powdered iron Substances 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 27
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 25
- 239000005084 Strontium aluminate Substances 0.000 claims abstract description 24
- FNWBQFMGIFLWII-UHFFFAOYSA-N strontium aluminate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Al+3].[Sr+2].[Sr+2] FNWBQFMGIFLWII-UHFFFAOYSA-N 0.000 claims abstract description 24
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000005997 Calcium carbide Substances 0.000 claims abstract description 11
- 229910000519 Ferrosilicon Inorganic materials 0.000 claims abstract description 11
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910000514 dolomite Inorganic materials 0.000 claims abstract description 8
- 239000010459 dolomite Substances 0.000 claims abstract description 8
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000391 magnesium silicate Substances 0.000 claims abstract description 8
- 229910052919 magnesium silicate Inorganic materials 0.000 claims abstract description 8
- 235000019792 magnesium silicate Nutrition 0.000 claims abstract description 8
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011572 manganese Substances 0.000 claims abstract description 7
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000009628 steelmaking Methods 0.000 claims description 7
- 230000035515 penetration Effects 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 235000013980 iron oxide Nutrition 0.000 description 7
- 239000000945 filler Substances 0.000 description 5
- 239000003638 chemical reducing agent Substances 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910001200 Ferrotitanium Inorganic materials 0.000 description 2
- 229910000655 Killed steel Inorganic materials 0.000 description 2
- AMWRITDGCCNYAT-UHFFFAOYSA-L manganese oxide Inorganic materials [Mn].O[Mn]=O.O[Mn]=O AMWRITDGCCNYAT-UHFFFAOYSA-L 0.000 description 2
- PPNAOCWZXJOHFK-UHFFFAOYSA-N manganese(2+);oxygen(2-) Chemical class [O-2].[Mn+2] PPNAOCWZXJOHFK-UHFFFAOYSA-N 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 235000013379 molasses Nutrition 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Treatment Of Steel In Its Molten State (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
A deoxidizing briquette, for effectively deoxidizing slag, heavy enough to sink into a typical slag layer, has about half its weight provided by a densifying material such as powdered iron, powdered manganese or powdered iron oxide, with the remainder of the briquette being provided by comparable quantities by weight of a deoxidizer and a binder. The deoxidizer may be ferro-silicon, aluminum or calcium carbide, while the binder may consist of strontium aluminate, dolomite or magnesium silicate.
Description
DENSE SLAG-DEOXIDIZING BRIQUETTE
This invention relates generally to steelmaking, and has to do particularly with a briquette for conditioning slag.
BACKGROUND OF THIS INVENITON
One of the by-products of the steel-making process is the generation, in the furnace, of a slag overlying the molten steel, the slag containing metallic oxides such as iron oxides, manganese oxides and the like, in addition to lime and/or dolime.
In order to achieve refinement of the steel, it is necessary to "kill" the slag, i.e. to deoxidize it. It is well known to use deoxidant materials such as aluminum, calcium carbide, ferro-silicon and titanium. However, because of their low density, all of these additions have a tendency to float on top of the slag and reduce it only marginally.
GENERAL DESCRIPTION OF THIS INVENTION
In view of the foregoing problem, one form of the present invention provides a densified briquette in which powdered iron is used as a densifier, and strontium aluminate is used as a binder, because of its cementatious properties.
Strontium aluminate may also function as a filler. In addition to these two materials, there is provided a deoxidizer (reducer) which may be ferro-silicon for silicon-killed steel, aluminum for aluminum-killed steel, or calcium carbide for both types of steel. Any other reducer can also be utilized.
In another form of this invention, in place of iron as the densifier, it is possible to use manganese, iron oxide, and other metallic oxides. As a further variant, the strontium aluminate could be replaced by a binder such as sodium silicate or molasses.
More particularly, this invention provides, for use in steelmaking, a deoxidizing briquette of which about half the weight is provided by a densifying material, the remainder consisting mostly of comparable quantities by weight of a deoxidizer and a binder such that the density of the briquette is superior to the density of slag, and inferior to the density of steel.
Further, this invention provides, for use in steelmaking, a deoxidizing briquette of which about half the weight is provided by a densifying material selected from the group consisting of powdered iron, powdered manganese and powdered iron oxide, the remainder consisting mostly of comparable quantities by weight of a deoxidizer and a binder, the deoxidizer being selected from the group consisting of ferro-silicon, aluminum and calcium carbide, the binder including at least one material selected from the group consisting of strontium aluminate, dolomite and magnesium silicate.
Still further, this invention provides a process for killing a slag layer covering a quantity of molten steel, comprising the distribution, over the slag layer, of a plurality of deoxidizing briquettes in each of which about half the weight is provided by a densifying material selected from the group consisting of powdered iron, powdered manganese and powdered iron oxide, the remainder consisting mostly of comparable quantities by weight of a deoxidizer and a binder, the deoxidizer being selected from the group consisting of ferro-silicon, aluminum and calcium carbide, the binder including at least one material selected from the group consisting of strontium aluminate, dolomite and magnesium silicate.
Finally, this invention provides a process for killing a slag layer covering a quantity of molten steel, comprising the distribution, over the slag layer, of a plurality of deoxidizing briquettes each containing a densifying material selected from the group consisting of powdered iron, powdered manganese and powdered iron oxide, said densifying material being present in such a percentage by weight that each briquette has an overall density greater than that of the slag layer, the remainder of each briquette consisting mostly of comparable quantities by weight of a deoxidizes and a binder, the deoxidizes being selected from the group consisting of ferro-silicon, aluminum and calcium carbide, the binder including at least one material selected from the group consisting of strontium aluminate, dolomite and magnesium silicate.
DETAILED DESCRIPTION OF THE INVENTION
As is pointed out at the beginning of this disclosure, a current difficulty in the conventional steelmaking process relates to the process of "killing" the slag which lies on top of the molten steel. In current practice, the process of "killing"
the slag involves the reduction of certain components of the slag, specifically iron and manganese oxides, resulting in deoxidizing the slag. To accomplish this, reducing materials such as aluminum, calcium carbide, ferro-silicon and titanium may be introduced into the melt/slag combination. Such materials, however, are of low density, and have a tendency to float on top of the slag, leading to incomplete reduction of the slag.
The central focus of the present invention is the utilization of a relatively dense component, making it a part of a briquette which can be added to the slag, thus densifying the briquette to the point where it mixes into the body of the slag, thus more efficiently carrying out its function as a deoxidizes.
It has been found that a deoxidizing briquette having about half of its weight supplied by a densifying material (for example, powdered iron) functions satisfactorily to "kill" the slag. Preferably, the remainder of the briquette (the other half] consists of comparable quantities by weight of a deoxidizes and a binder/filler.
This invention relates generally to steelmaking, and has to do particularly with a briquette for conditioning slag.
BACKGROUND OF THIS INVENITON
One of the by-products of the steel-making process is the generation, in the furnace, of a slag overlying the molten steel, the slag containing metallic oxides such as iron oxides, manganese oxides and the like, in addition to lime and/or dolime.
In order to achieve refinement of the steel, it is necessary to "kill" the slag, i.e. to deoxidize it. It is well known to use deoxidant materials such as aluminum, calcium carbide, ferro-silicon and titanium. However, because of their low density, all of these additions have a tendency to float on top of the slag and reduce it only marginally.
GENERAL DESCRIPTION OF THIS INVENTION
In view of the foregoing problem, one form of the present invention provides a densified briquette in which powdered iron is used as a densifier, and strontium aluminate is used as a binder, because of its cementatious properties.
Strontium aluminate may also function as a filler. In addition to these two materials, there is provided a deoxidizer (reducer) which may be ferro-silicon for silicon-killed steel, aluminum for aluminum-killed steel, or calcium carbide for both types of steel. Any other reducer can also be utilized.
In another form of this invention, in place of iron as the densifier, it is possible to use manganese, iron oxide, and other metallic oxides. As a further variant, the strontium aluminate could be replaced by a binder such as sodium silicate or molasses.
More particularly, this invention provides, for use in steelmaking, a deoxidizing briquette of which about half the weight is provided by a densifying material, the remainder consisting mostly of comparable quantities by weight of a deoxidizer and a binder such that the density of the briquette is superior to the density of slag, and inferior to the density of steel.
Further, this invention provides, for use in steelmaking, a deoxidizing briquette of which about half the weight is provided by a densifying material selected from the group consisting of powdered iron, powdered manganese and powdered iron oxide, the remainder consisting mostly of comparable quantities by weight of a deoxidizer and a binder, the deoxidizer being selected from the group consisting of ferro-silicon, aluminum and calcium carbide, the binder including at least one material selected from the group consisting of strontium aluminate, dolomite and magnesium silicate.
Still further, this invention provides a process for killing a slag layer covering a quantity of molten steel, comprising the distribution, over the slag layer, of a plurality of deoxidizing briquettes in each of which about half the weight is provided by a densifying material selected from the group consisting of powdered iron, powdered manganese and powdered iron oxide, the remainder consisting mostly of comparable quantities by weight of a deoxidizer and a binder, the deoxidizer being selected from the group consisting of ferro-silicon, aluminum and calcium carbide, the binder including at least one material selected from the group consisting of strontium aluminate, dolomite and magnesium silicate.
Finally, this invention provides a process for killing a slag layer covering a quantity of molten steel, comprising the distribution, over the slag layer, of a plurality of deoxidizing briquettes each containing a densifying material selected from the group consisting of powdered iron, powdered manganese and powdered iron oxide, said densifying material being present in such a percentage by weight that each briquette has an overall density greater than that of the slag layer, the remainder of each briquette consisting mostly of comparable quantities by weight of a deoxidizes and a binder, the deoxidizes being selected from the group consisting of ferro-silicon, aluminum and calcium carbide, the binder including at least one material selected from the group consisting of strontium aluminate, dolomite and magnesium silicate.
DETAILED DESCRIPTION OF THE INVENTION
As is pointed out at the beginning of this disclosure, a current difficulty in the conventional steelmaking process relates to the process of "killing" the slag which lies on top of the molten steel. In current practice, the process of "killing"
the slag involves the reduction of certain components of the slag, specifically iron and manganese oxides, resulting in deoxidizing the slag. To accomplish this, reducing materials such as aluminum, calcium carbide, ferro-silicon and titanium may be introduced into the melt/slag combination. Such materials, however, are of low density, and have a tendency to float on top of the slag, leading to incomplete reduction of the slag.
The central focus of the present invention is the utilization of a relatively dense component, making it a part of a briquette which can be added to the slag, thus densifying the briquette to the point where it mixes into the body of the slag, thus more efficiently carrying out its function as a deoxidizes.
It has been found that a deoxidizing briquette having about half of its weight supplied by a densifying material (for example, powdered iron) functions satisfactorily to "kill" the slag. Preferably, the remainder of the briquette (the other half] consists of comparable quantities by weight of a deoxidizes and a binder/filler.
As previously mentioned, satisfactory reducers are ferro-silicon, titanium, aluminum and calcium carbide. Also, any one or more of: strontium aluminate, dolomite and magnesium silicate will be satisfactory as the binder/filler.
Below are found four examples of a blended slag conditioner in briquette form. The numbers in the four rows beginning with aluminum are percent by weight. All briquettes in the table use aluminum as the deoxidizes, iron or iron oxide as the densifier, and strontium aluminate as the binder.
#1 #2 #3 #4 Aluminum A1 20 25 30 15 Reducer Powdered iron Fe 50 50 40 60 Densifyer Dolime CaO, Mg0 15 Filler Strontium Aluminate SrO, A1z0330 25 30 10 Binder Density with Iron g/cc 3.35 3.5 3.14 4.4 Density with Iron g/cc 3.11 3.24 2.96 3.92 Oxide Generally, the density of slag lies between about 2.4 and about 2.45 g/cc.
The density of steel is from about 5.9 to about 7.2 g/cc. It will be noted from the foregoing table that the density of a briquette utilizing powdered iron is greater than the highest slag density (2.45 g/cc) for all of the mixtures identified in the table.
The same is true when iron oxide is used to densify the briquette. The difference in density promotes penetration of the slag by the briquettes, so that the dioxidizing of the slag will take place within the mass of the slag rather than only on the surface.
This increases the efficiency, and means that less product is necessary.
This invention may also be conceived as a process for the improved refinement of molten steel, the process consisting of the introduction, into a vessel containing the molten steel, and preferably above an existing slag layer, of a plurality of deoxidizing briquettes, constituted as described above. In other words, each briquette would have about half its weight provided by a densifying material, the remainder consisting mostly of a deoxidizer and a binder, and optionally a filler material.
More specifically, in one form, a satisfactory deoxidizing briquette may 5 contain:
a) from about 15 % to about 30 % by weight of aluminum, b) from about 40 % to about 60 % of powdered iron, and c) from about 25 % to about 30 % of a binder.
While certain embodiments and variations of the invention have been described above, it will be evident to those skilled in the art that changes and modifications may be made therein, without departing from the essence of this invention, as set forth in the appended claims.
Below are found four examples of a blended slag conditioner in briquette form. The numbers in the four rows beginning with aluminum are percent by weight. All briquettes in the table use aluminum as the deoxidizes, iron or iron oxide as the densifier, and strontium aluminate as the binder.
#1 #2 #3 #4 Aluminum A1 20 25 30 15 Reducer Powdered iron Fe 50 50 40 60 Densifyer Dolime CaO, Mg0 15 Filler Strontium Aluminate SrO, A1z0330 25 30 10 Binder Density with Iron g/cc 3.35 3.5 3.14 4.4 Density with Iron g/cc 3.11 3.24 2.96 3.92 Oxide Generally, the density of slag lies between about 2.4 and about 2.45 g/cc.
The density of steel is from about 5.9 to about 7.2 g/cc. It will be noted from the foregoing table that the density of a briquette utilizing powdered iron is greater than the highest slag density (2.45 g/cc) for all of the mixtures identified in the table.
The same is true when iron oxide is used to densify the briquette. The difference in density promotes penetration of the slag by the briquettes, so that the dioxidizing of the slag will take place within the mass of the slag rather than only on the surface.
This increases the efficiency, and means that less product is necessary.
This invention may also be conceived as a process for the improved refinement of molten steel, the process consisting of the introduction, into a vessel containing the molten steel, and preferably above an existing slag layer, of a plurality of deoxidizing briquettes, constituted as described above. In other words, each briquette would have about half its weight provided by a densifying material, the remainder consisting mostly of a deoxidizer and a binder, and optionally a filler material.
More specifically, in one form, a satisfactory deoxidizing briquette may 5 contain:
a) from about 15 % to about 30 % by weight of aluminum, b) from about 40 % to about 60 % of powdered iron, and c) from about 25 % to about 30 % of a binder.
While certain embodiments and variations of the invention have been described above, it will be evident to those skilled in the art that changes and modifications may be made therein, without departing from the essence of this invention, as set forth in the appended claims.
Claims (24)
1. For use in steelmaking, a deoxidizing briquette of which about half the weight is provided by a densifying material, the remainder consisting mostly of comparable quantities by weight of a deoxidizer and a binder such that the density of the briquette is superior to the density of slag, and inferior to the density of steel.
2. For use in steelmaking, a deoxidizing briquette of which about half the weight is provided by a densifying material selected from the group consisting of powdered iron, powdered manganese and powdered iron oxide, the remainder consisting mostly of comparable quantities by weight of a deoxidizer and a binder, the deoxidizer being selected from the group consisting of ferro-silicon, aluminum and calcium carbide, the binder including at least one material selected from the group consisting of strontium aluminate, dolomite and magnesium silicate.
3. The deoxidizing briquette claimed in claim 1 in which from about 40% to about 60% of the weight is provided by said densifying material.
4. The deoxidizing briquette claimed in claim 2, in which from about 40% to about 60% of the weight is provided by said densifying material.
5. The deoxidizing briquette claimed in claim 4, containing:
a) from about 15% to about 30% by weight of aluminum, b) from about 40% to about 60% of powdered iron, and c) from about 10% to about 30% of a binder.
a) from about 15% to about 30% by weight of aluminum, b) from about 40% to about 60% of powdered iron, and c) from about 10% to about 30% of a binder.
6. The deoxidizing briquette claimed in claim 5, in which substantially all of the binder is strontium aluminate.
7 7. The deoxidizing briquette claimed in claim 5, in which all of the binder is strontium aluminate.
8. The deoxidizing briquette claimed in claim 5, in which the binder constitutes about 10% by weight of the briquette, the briquette further being about 15% by weight dolime.
9. The deoxidizing briquette claimed in claim 2, containing about 20% by weight of aluminum, about 50% by weight of powdered iron, and about 30% by weight of strontium aluminate.
10. The deoxidizing briquette claimed in claim 2, containing about 25% by weight of aluminum, about 50% by weight of powdered iron, and about 25% by weight of strontium aluminate.
11. The deoxidizing briquette claimed in claim 2, containing about 30% by weight of aluminum, about 40% by weight of powdered iron, and about 30% by weight of strontium aluminate.
12. The deoxidizing briquette claimed in claim 2, containing about 15% by weight of aluminum, about 60% by weight of powdered iron, about 15% by weight of dolime, and about 10% by weight of strontium aluminate.
13. A process for the refinement of molten steel in which a slag layer overlies the molten steel, the process comprising penetrating the slag layer with a plurality of the briquettes as claimed in claim 1.
14. A process for the refinement of molten steel in which a slag layer overlies the molten steel, the process comprising penetrating the slag layer with a plurality of the briquettes as claimed in claim 2.
15. A process for killing a slag layer covering a quantity of molten steel, comprising the distribution, over the slag layer, of a plurality of deoxidizing briquettes in each of which about half the weight is provided by a densifying material selected from the group consisting of powdered iron, powdered manganese and powdered iron oxide, the remainder consisting mostly of comparable quantities by weight of a deoxidizer and a binder, the deoxidizer being selected from the group consisting of ferro-silicon, aluminum and calcium carbide, the binder including at least one material selected from the group consisting of strontium aluminate, dolomite and magnesium silicate.
16. The process claimed in claim 15 in which from about 40% to about 60% of the briquette weight is provided by said densifying material.
17. The process claimed in claim 15, in which the deoxidizing briquettes each contain:
a) from about 15% to about 30% by weight of aluminum, b) from about 40% to about 60% by weight of powdered iron, and c) from about 10% to about 30% by weight of a binder.
a) from about 15% to about 30% by weight of aluminum, b) from about 40% to about 60% by weight of powdered iron, and c) from about 10% to about 30% by weight of a binder.
18. The process claimed in claim 17, in which substantially all of the binder is strontium aluminate.
19. The process claimed in claim 15, in which each briquette contains about
20%
by weight of aluminum, about 50% by weight of powdered iron, and about 30% by weight of strontium aluminate.
20. The process claimed in claim 15, in which each briquette contains about 25%
by weight of aluminum, about 50% by weight of powdered iron, and about 25% by weight of strontium aluminate.
by weight of aluminum, about 50% by weight of powdered iron, and about 30% by weight of strontium aluminate.
20. The process claimed in claim 15, in which each briquette contains about 25%
by weight of aluminum, about 50% by weight of powdered iron, and about 25% by weight of strontium aluminate.
21. The process claimed in claim 15, in which each briquette contains about 30 by weight of aluminum, about 40% by weight of powdered iron, and about 30% by weight of strontium aluminate.
22. The process claimed in claim 15, in which each briquette contains about 15%
by weight of aluminum, about 60% by weight of powdered iron, about 15% by weight of dolime, and about 10% by weight of strontium aluminate.
by weight of aluminum, about 60% by weight of powdered iron, about 15% by weight of dolime, and about 10% by weight of strontium aluminate.
23. A process for killing a slag layer covering a quantity of molten steel, comprising the distribution, over the slag layer, of a plurality of deoxidizing briquettes each containing a densifying material selected from the group consisting of powdered iron, powdered manganese and powdered iron oxide, said densifying material being present in such a percentage by weight that each briquette has an overall density greater than that of the slag layer, the remainder of each briquette consisting mostly of comparable quantities by weight of a deoxidizer and a binder, the deoxidizer being selected from the group consisting of ferro-silicon, aluminum and calcium carbide, the binder including at least one material selected from the group consisting of strontium aluminate, dolomite and magnesium silicate.
24. The process claimed in claim 23, in which the percentage of the densifier is adjusted so as to cause the briquette to achieve from slight to complete penetration of the slag layer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10899298P | 1998-11-18 | 1998-11-18 | |
| US60/108,992 | 1998-11-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2290068A1 true CA2290068A1 (en) | 2000-05-18 |
Family
ID=31713957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2290068 Abandoned CA2290068A1 (en) | 1998-11-18 | 1999-11-16 | Dense slag-deoxidizing briquette |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2290068A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014169392A1 (en) * | 2013-04-19 | 2014-10-23 | Metcan Industrial Corp. | Synthetic slag briquettes for use in steelmaking |
-
1999
- 1999-11-16 CA CA 2290068 patent/CA2290068A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014169392A1 (en) * | 2013-04-19 | 2014-10-23 | Metcan Industrial Corp. | Synthetic slag briquettes for use in steelmaking |
| US9580768B2 (en) | 2013-04-19 | 2017-02-28 | Metcan Industrial Corp. | Synthetic slag briquettes for use in steelmaking |
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