EP0164592B2 - Feinkörniges Entschwefelungsmittel für Eisenschmelzen und Verfahren zur Entschwefelung von Roheisenschmelzen - Google Patents
Feinkörniges Entschwefelungsmittel für Eisenschmelzen und Verfahren zur Entschwefelung von Roheisenschmelzen Download PDFInfo
- Publication number
- EP0164592B2 EP0164592B2 EP85105870A EP85105870A EP0164592B2 EP 0164592 B2 EP0164592 B2 EP 0164592B2 EP 85105870 A EP85105870 A EP 85105870A EP 85105870 A EP85105870 A EP 85105870A EP 0164592 B2 EP0164592 B2 EP 0164592B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydrogen
- component
- agent
- splitting
- agent according
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000003795 chemical substances by application Substances 0.000 title claims description 39
- 229910000805 Pig iron Inorganic materials 0.000 title claims description 19
- 239000000155 melt Substances 0.000 title claims description 7
- 238000006477 desulfuration reaction Methods 0.000 title abstract description 33
- 230000023556 desulfurization Effects 0.000 title abstract description 33
- SMYMJHWAQXWPDB-UHFFFAOYSA-N (2,4,5-trichlorophenoxy)acetic acid Chemical compound OC(=O)COC1=CC(Cl)=C(Cl)C=C1Cl SMYMJHWAQXWPDB-UHFFFAOYSA-N 0.000 title 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 239000001257 hydrogen Substances 0.000 claims abstract description 27
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 27
- 239000011777 magnesium Substances 0.000 claims abstract description 24
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 21
- 239000005997 Calcium carbide Substances 0.000 claims abstract description 20
- 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 20
- 150000001875 compounds Chemical class 0.000 claims abstract description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 48
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 24
- 229910052742 iron Inorganic materials 0.000 claims description 24
- 239000007789 gas Substances 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 14
- 229930195733 hydrocarbon Natural products 0.000 claims description 13
- 150000002430 hydrocarbons Chemical class 0.000 claims description 13
- 239000001569 carbon dioxide Substances 0.000 claims description 12
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 12
- -1 polyethylene Polymers 0.000 claims description 9
- 239000004215 Carbon black (E152) Substances 0.000 claims description 8
- 239000004571 lime Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 7
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 6
- 239000012159 carrier gas Substances 0.000 claims description 6
- 239000010436 fluorite Substances 0.000 claims description 6
- 239000002893 slag Substances 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 5
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 239000000654 additive Substances 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 claims description 3
- 239000003245 coal Substances 0.000 claims description 3
- 239000010459 dolomite Substances 0.000 claims description 3
- 229910000514 dolomite Inorganic materials 0.000 claims description 3
- 229910052736 halogen Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 2
- 238000009835 boiling Methods 0.000 claims description 2
- 229910021540 colemanite Inorganic materials 0.000 claims description 2
- 229910001610 cryolite Inorganic materials 0.000 claims description 2
- 229910010272 inorganic material Inorganic materials 0.000 claims description 2
- 239000011147 inorganic material Substances 0.000 claims description 2
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims 1
- 239000003077 lignite Substances 0.000 claims 1
- 239000004575 stone Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 abstract description 19
- 230000003578 releasing effect Effects 0.000 abstract description 14
- 229910052751 metal Inorganic materials 0.000 abstract description 6
- 239000002184 metal Substances 0.000 abstract description 6
- 230000003009 desulfurizing effect Effects 0.000 description 11
- 239000004793 Polystyrene Substances 0.000 description 6
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 4
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 4
- 239000000470 constituent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 229910052717 sulfur Inorganic materials 0.000 description 4
- 239000011593 sulfur Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 239000000920 calcium hydroxide Substances 0.000 description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011261 inert gas Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 150000001247 metal acetylides Chemical class 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910014813 CaC2 Inorganic materials 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 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
- 150000001412 amines Chemical class 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229940043430 calcium compound Drugs 0.000 description 1
- 150000001674 calcium compounds Chemical class 0.000 description 1
- MYFXBBAEXORJNB-UHFFFAOYSA-N calcium cyanamide Chemical compound [Ca+2].[N-]=C=[N-] MYFXBBAEXORJNB-UHFFFAOYSA-N 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 235000012204 lemonade/lime carbonate Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000003415 peat Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- C21C1/00—Refining of pig-iron; Cast iron
- C21C1/02—Dephosphorising or desulfurising
- C21C1/025—Agents used for dephosphorising or desulfurising
Definitions
- the invention relates to means and methods for the desulfurization of pig iron melts.
- Desulphurization of pig iron outside the blast furnace is an indispensable necessity due to the increasing sulfur content in the ores and black matter. Numerous means and processes have already been known for achieving sufficient levels of desulphurization. Mixtures based on calcium carbide with diamide lime (DE-PS 17 58 250) and with hydrogen (DE-PS 22 52 796) or water (DE-PS 22 52 795) additives are preferably used. Calcium-containing compounds in combination with hydrocarbons such as oil or paraffin (FR-PS 11 66 389 and US-PS 28 63 755) have already been proposed.
- the purpose of the gas-releasing component is to distribute the finely ground particles of the base desulfurization agent in the molten iron.
- DE-OS 28 35 872 describes a process for the desulfurization of pig iron using a desulfurization mixture of calcium carbide, a gas-releasing component and fluorspar; A large number of water-releasing compounds, hydrogen-releasing compounds and carbon dioxide-releasing compounds are equally mentioned as gas-releasing components.
- the desulfurization agent can also contain reducing metals and metal carbides, such as. As aluminum, magnesium, alloys, such as. As calcium silicon or metal carbides.
- Another subject is a desulfurization process, in which the desulfurization agent according to the invention is used, according to claim 11.
- a commercially available product with contents of 70 to 85% CaC Z is normally used as calcium carbide, but so-called eutectic carbide with contents of 65% CaC 2 and below can also be used.
- Solid or liquid hydrocarbons can be used as the hydrogen-releasing compounds.
- solid hydrocarbons at room temperature are, for. B. polyethylene, polypropylene, polyvinyl chloride or polystyrene.
- liquid hydrocarbons which may contain halogen, z. B. those with boiling points between 50 and 350 ° C can be used.
- These liquid substances are preferably used in a form absorbed in porous organic or inorganic material, which can contain up to a multiple of its own weight of hydrocarbon.
- Preferred porous materials for this purpose are those which themselves can also split off hydrogen or have a favorable influence on the formation of slags, such as, for example, B. polyurethane foam, peat or expanded minerals.
- Those hydrocarbons or mixtures thereof which contain little or no oxygen are preferred.
- component A can also have 1 to 10% by weight of other constituents which have a favorable effect on the properties of the slag, such as, for. B. fluorspar, alumina, cryolite or colemanite.
- additives which release carbon dioxide such as, in particular, calcium carbonate, dolomite or diamide lime, individually or as a mixture, can preferably also be mixed in with component A.
- carbon dioxide such as, in particular, calcium carbonate, dolomite or diamide lime, individually or as a mixture
- component A additives which release carbon dioxide
- component A can be so limited that the volume of carbon dioxide developed therefrom and any other C0 2- delivering substances present is less than the volume of hydrogen developed from the compounds which release hydrogen.
- These substances that release carbon dioxide can be ground together with the calcium carbide. If the specified quantity conditions are adhered to, they cause practically no oxidation of the magnesium or calcium carbide in the molten iron, but increase the beneficial effect of the split off hydrogen by the CO 2 formed (which is also formed in certain quantities by the hydrocarbon).
- component A may be expedient to additionally mix component A with brown or gas coal, anthracite or hard coal, which also have a gas-releasing effect.
- component A can also be added in small amounts (about 0.01 to 0.5% by weight) also commercially available flow improvers such as graphite, long-chain organic amines, alcohols, esters or silicones.
- the constituents of component A are ground and mixed intensively, the mixing process advantageously being carried out in a mill, which is preferably a tube mill, under an inert gas blanket.
- the constituents are preferably comminuted to such an extent that 90% of the mixture has a grain size ⁇ 90 ⁇ m and about 50% has a grain size ⁇ 50 ⁇ m. Certain deviations from this are irrelevant to the desulfurization effect.
- the magnesium can be added to component A in powder form in the mill or afterwards if component A is, for. B. contains a ratio of 70 to 99 wt .-% calcium carbide and 1 to 30 wt .-% essentially hydrogen-releasing compounds.
- Components A and B can be mixed before being blown into the molten iron, so that they are conveyed pneumatically into the melt as a mixture.
- component A can be expedient to store component A separately from the magnesium after its production and to combine it with the magnesium only in the delivery line or in the lance and to introduce it together into the melt.
- the process according to the invention is characterized in that a mixture of calcium carbide and a hydrogen-releasing compound as component A is blown into the pig iron together with component B, the magnesium.
- Components A and B are used in a ratio of 40 to 95 to 5 to 60% by weight.
- carbon dioxide-releasing substance such as alkaline earth metal carbonate, dolomite or diamide lime and hydrogen-releasing substance such as hydrocarbon
- the process is advantageously carried out in such a way that a blowing rate of 10 to 100 kg, preferably 15 to 80 kg, per minute of desulfurizing agent, consisting of component A and magnesium, is blown into the iron melt.
- a blowing rate of 10 to 100 kg, preferably 15 to 80 kg, per minute of desulfurizing agent, consisting of component A and magnesium is blown into the iron melt.
- the desulfurization agent is preferably blown pneumatically into the molten iron as deeply as possible using a submersible lance.
- Inert gases such as argon or nitrogen come alone or as a mixture, or reactive gases which release hydrogen and / or contain CO 2 , alone or as a mixture, as carrier gases Question.
- the desulfurization agent according to the invention is suitable in connection with the blowing process described just as well for hot metal desulfurization in the transfer pan as in the transport pan (torpedo pan).
- the particularly low requirement for injection gas has a particularly advantageous effect; the composition of the agent guarantees sufficient distribution so that a high degree of utilization of the desulfurizing agent is achieved.
- the desulfurization agent according to the invention has considerable advantages over the known agents in connection with the method according to the invention. According to the invention, a significant increase in the degree of desulfurization is achieved or a noticeably reduced amount of desulfurizing agent is required to achieve the same desulfurization effect.
- the compounds which cause the desulfurization of the molten iron, that is to say the calcium carbide and the magnesium, in combination with the compounds which essentially release hydrogen, are completely available for the desulfurization reaction since they are not consumed by oxidation processes.
- Table 1 below describes various desulfurizing agents, their use and the results achieved with them. The results are averages from at least 3 desulfurization treatments each.
- Examples 1 to 4 are comparative examples which were carried out using known desulfurization agents based on calcium carbide and diamide lime or calcium hydroxide and carbon.
- a-value Indicator for the effectiveness of desulfurization (quotient of the difference between the initial and final sulfur content of the pig iron melt and the amount of desulfurizing agent used per ton of pig iron).
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Catalysts (AREA)
- Carbon And Carbon Compounds (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Compounds Of Iron (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT85105870T ATE35153T1 (de) | 1984-05-16 | 1985-05-13 | Feinkoerniges entschwefelungsmittel fuer eisenschmelzen und verfahren zur entschwefelung von roheisenschmelzen. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3418075 | 1984-05-16 | ||
| DE3418075 | 1984-05-16 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0164592A1 EP0164592A1 (de) | 1985-12-18 |
| EP0164592B1 EP0164592B1 (de) | 1988-06-15 |
| EP0164592B2 true EP0164592B2 (de) | 1991-08-14 |
Family
ID=6235932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP85105870A Expired - Lifetime EP0164592B2 (de) | 1984-05-16 | 1985-05-13 | Feinkörniges Entschwefelungsmittel für Eisenschmelzen und Verfahren zur Entschwefelung von Roheisenschmelzen |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US4592777A (fi) |
| EP (1) | EP0164592B2 (fi) |
| AT (1) | ATE35153T1 (fi) |
| AU (1) | AU568056B2 (fi) |
| CA (1) | CA1240842A (fi) |
| DE (1) | DE3563360D1 (fi) |
| ES (1) | ES8606504A1 (fi) |
| FI (1) | FI78736C (fi) |
| IN (1) | IN162816B (fi) |
| NO (1) | NO165765C (fi) |
| ZA (1) | ZA853556B (fi) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011008690A1 (de) * | 2011-01-15 | 2012-07-19 | Mechthilde Döring-Freißmuth | Mittel zur Behandlung von Metallschmelzen und Verwendung desselben |
Families Citing this family (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3544563C2 (de) * | 1985-12-17 | 1998-07-16 | Sueddeutsche Kalkstickstoff | Mittel zur Entschwefelung von geschmolzenem Eisen |
| BR8606249A (pt) * | 1985-12-17 | 1987-09-29 | Sueddeutsche Kalkstickstoff | Composicao finamente granulada para a dessulfuracao de ferro fundido e processo para sua preparacao |
| US4820760A (en) * | 1987-05-28 | 1989-04-11 | Ferro Corporation | Non plateout molding composition |
| DE3910776A1 (de) * | 1988-05-10 | 1989-11-23 | Fischer Ag Georg | Verfahren zur behandlung von gusseisenschmelzen in einer offenen pfanne mittels reinmagnesium |
| DE3908071A1 (de) * | 1989-03-13 | 1990-09-20 | Hoechst Ag | Mittel und verfahren zum entschwefeln von metallschmelzen |
| ATE142705T1 (de) * | 1991-04-02 | 1996-09-15 | Pechiney Electrometallurgie | Entschwefelungsmittel für roheisen, aus calciumkarbid und organisches bindemittel |
| FR2679256B1 (fr) * | 1991-07-18 | 1994-08-12 | Pechiney Electrometallurgie | Desulfurant pour fonte liquide a base de carbure de calcium agglomere. |
| FR2676457B1 (fr) * | 1991-05-16 | 1993-07-23 | Pechiney Electrometallurgie | Desulfurant pour fonte constitue de magnesium et de carbure de calcium enrobes. |
| FR2688230A1 (fr) * | 1992-03-05 | 1993-09-10 | Pechiney Electrometallurgie | Desulfurant pour la fonte a base de poudres ultrafines de magnesium ou de carbure de calcium agglomerees par un liant polymere. |
| US5358550A (en) * | 1992-10-26 | 1994-10-25 | Rossborough Manufacturing Company | Desulfurization agent |
| DE19546235C2 (de) * | 1995-12-12 | 1997-12-11 | Sueddeutsche Kalkstickstoff | Entschwefelungsmittel zur Koinjektionsbehandlung von Roheisenschmelzen |
| JP3577997B2 (ja) * | 1999-06-07 | 2004-10-20 | Ｊｆｅスチール株式会社 | 溶銑の脱硫方法 |
| US6372014B1 (en) | 2000-04-10 | 2002-04-16 | Rossborough Manufacturing Co. L.P. | Magnesium injection agent for ferrous metal |
| US6352570B1 (en) * | 2000-04-10 | 2002-03-05 | Rossborough Manufacturing Co., Lp | Magnesium desulfurization agent |
| US6770115B2 (en) * | 2002-10-18 | 2004-08-03 | Remacor, Inc. | Process for magnesium granules |
| US6989040B2 (en) * | 2002-10-30 | 2006-01-24 | Gerald Zebrowski | Reclaimed magnesium desulfurization agent |
| US20050056120A1 (en) * | 2003-09-15 | 2005-03-17 | Flores-Morales Jose Ignacio | Desulphurization of ferrous materials using sodium silicate |
| US20050066772A1 (en) * | 2003-09-26 | 2005-03-31 | Flores-Morales Jose Ignacio | Desulphurization of ferrous materials using glass cullet |
| US7731778B2 (en) * | 2006-03-27 | 2010-06-08 | Magnesium Technologies Corporation | Scrap bale for steel making process |
| US20080196548A1 (en) * | 2007-02-16 | 2008-08-21 | Magnesium Technologies Corporation | Desulfurization puck |
| EP2275580A1 (de) | 2009-07-06 | 2011-01-19 | SKW Stahl-Metallurgie GmbH | Verfahren und Mittel zur Behandlung von Roheisenentschwefelungsschlacken |
| JP5856185B2 (ja) | 2011-01-15 | 2016-02-09 | アルマメット ゲゼルシャフト ミット ベシュレンクテル ハフツンク | 溶銑を脱リンするための剤の使用 |
| DE102011116501C5 (de) | 2011-10-20 | 2018-05-24 | Almamet Gmbh | Bitumen enthaltendes Entschwefelungsmittel |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4159906A (en) * | 1972-10-27 | 1979-07-03 | Suddeutsche Kalkstickstoff-Werke Aktiengesellschaft | Method and composition for the desulfurization of molten metals |
| DE2252796C3 (de) * | 1972-10-27 | 1982-08-12 | Skw Trostberg Ag, 8223 Trostberg | Entschwefelungsmittel für Roheisen und Ferrolegierungsschmelzen |
| US3876421A (en) * | 1972-11-09 | 1975-04-08 | Nippon Steel Corp | Process for desulfurization of molten pig iron |
| US3929464A (en) * | 1973-08-31 | 1975-12-30 | Union Carbide Corp | Desulfurization of molten ferrous metals |
| DE2531047B2 (de) * | 1975-07-11 | 1978-07-06 | Kloeckner-Werke Ag, 4100 Duisburg | Verfahren zum Entschwefeln von Roheisen |
| US3998625A (en) * | 1975-11-12 | 1976-12-21 | Jones & Laughlin Steel Corporation | Desulfurization method |
| DE2641817C2 (de) * | 1976-09-17 | 1985-02-14 | Hoechst Ag, 6230 Frankfurt | Pulvergemische zur Entschwefelung von Eisenschmelzen |
| US4137072A (en) * | 1976-12-01 | 1979-01-30 | Toyo Soda Manufacturing Co., Ltd. | Additive for use in refining iron |
| WO1979000398A1 (en) * | 1977-12-16 | 1979-07-12 | Foseco Int | Desulphurisation of ferrous metals |
| DE2835872C3 (de) * | 1978-08-16 | 1981-02-05 | Skw Trostberg Ag, 8223 Trostberg | Verfahren zur Verminderung der Staubund Flammenbelästigung bei der Handhabung der Schlacken nach der Roheisenentschwefelung mittels eines Entschwefelungsgemisches und Entschwefelungsgemisch |
| FR2473061A1 (fr) * | 1980-01-07 | 1981-07-10 | Sueddeutsche Kalkstickstoff | Procede pour reduire le degagement de poussieres et de flammes lors de la manipulation des scories apres desulfuration de la fonte, et melange de desulfuration approprie |
| US4286984A (en) * | 1980-04-03 | 1981-09-01 | Luyckx Leon A | Compositions and methods of production of alloy for treatment of liquid metals |
| DE3111510A1 (de) * | 1981-03-24 | 1982-10-07 | Hoechst Ag, 6000 Frankfurt | Entschwefelungsgemisch und verfahren zu seiner herstellung |
-
1984
- 1984-11-16 CA CA000468038A patent/CA1240842A/en not_active Expired
- 1984-12-13 US US06/681,174 patent/US4592777A/en not_active Expired - Lifetime
-
1985
- 1985-05-10 ZA ZA853556A patent/ZA853556B/xx unknown
- 1985-05-13 AT AT85105870T patent/ATE35153T1/de not_active IP Right Cessation
- 1985-05-13 DE DE8585105870T patent/DE3563360D1/de not_active Expired
- 1985-05-13 EP EP85105870A patent/EP0164592B2/de not_active Expired - Lifetime
- 1985-05-14 IN IN364/CAL/85A patent/IN162816B/en unknown
- 1985-05-14 NO NO851924A patent/NO165765C/no not_active IP Right Cessation
- 1985-05-15 FI FI851943A patent/FI78736C/fi not_active IP Right Cessation
- 1985-05-16 ES ES543217A patent/ES8606504A1/es not_active Expired
- 1985-05-16 AU AU42542/85A patent/AU568056B2/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102011008690A1 (de) * | 2011-01-15 | 2012-07-19 | Mechthilde Döring-Freißmuth | Mittel zur Behandlung von Metallschmelzen und Verwendung desselben |
Also Published As
| Publication number | Publication date |
|---|---|
| AU568056B2 (en) | 1987-12-10 |
| NO165765C (no) | 1991-04-10 |
| ES8606504A1 (es) | 1986-04-01 |
| IN162816B (fi) | 1988-07-09 |
| AU4254285A (en) | 1985-11-21 |
| NO165765B (no) | 1990-12-27 |
| ES543217A0 (es) | 1986-04-01 |
| NO851924L (no) | 1985-11-18 |
| EP0164592B1 (de) | 1988-06-15 |
| ZA853556B (en) | 1985-12-24 |
| FI851943L (fi) | 1985-11-17 |
| FI851943A0 (fi) | 1985-05-15 |
| CA1240842A (en) | 1988-08-23 |
| DE3563360D1 (en) | 1988-07-21 |
| US4592777A (en) | 1986-06-03 |
| FI78736B (fi) | 1989-05-31 |
| FI78736C (fi) | 1989-09-11 |
| ATE35153T1 (de) | 1988-07-15 |
| EP0164592A1 (de) | 1985-12-18 |
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