GB1517324A - Desulphurisation of steel - Google Patents
Desulphurisation of steelInfo
- Publication number
- GB1517324A GB1517324A GB38623/75A GB3862375A GB1517324A GB 1517324 A GB1517324 A GB 1517324A GB 38623/75 A GB38623/75 A GB 38623/75A GB 3862375 A GB3862375 A GB 3862375A GB 1517324 A GB1517324 A GB 1517324A
- Authority
- GB
- United Kingdom
- Prior art keywords
- agent
- steel
- slag
- ladle
- feo
- 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
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract 7
- 239000010959 steel Substances 0.000 title abstract 7
- 239000003795 chemical substances by application Substances 0.000 abstract 6
- 239000008187 granular material Substances 0.000 abstract 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 abstract 2
- 239000004615 ingredient Substances 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- 239000002893 slag Substances 0.000 abstract 2
- 229910000967 As alloy Inorganic materials 0.000 abstract 1
- 229910004261 CaF 2 Inorganic materials 0.000 abstract 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 abstract 1
- 229910004298 SiO 2 Inorganic materials 0.000 abstract 1
- 238000013019 agitation Methods 0.000 abstract 1
- 239000011230 binding agent Substances 0.000 abstract 1
- 239000003638 chemical reducing agent Substances 0.000 abstract 1
- 238000010304 firing Methods 0.000 abstract 1
- 239000011261 inert gas Substances 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000011812 mixed powder Substances 0.000 abstract 1
- 239000008188 pellet Substances 0.000 abstract 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 abstract 1
- LFQCEHFDDXELDD-UHFFFAOYSA-N tetramethyl orthosilicate Chemical compound CO[Si](OC)(OC)OC LFQCEHFDDXELDD-UHFFFAOYSA-N 0.000 abstract 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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/064—Dephosphorising; Desulfurising
- C21C7/0645—Agents used for dephosphorising or desulfurising
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
1517324 Desulphurization of steel SUMITOMO METAL INDUSTRIES Ltd 19 Sept 1975 38623/75 Heading C7D Molten steel is desulphurized by contact in a ladle with a granular slag-forming agent comprising 45 - 70 wt. per cent CaO, 10-30% Al 2 O 3 and 3-14% CaF 2 in amount 0.2 to 4% based on the molten steel, the slag-forming agent containing < 10% MgO, < 7% SiO 2 , < 3% FeO and < 0.2% P 2 O 5 . The granule size is between 0.3 and 25 mm; the agent may be made as a mixed powder; in this case the granule size may be 1-2 mm; or as a bound mixture, made by firing at 800-1300C in a rotary mixer the above ingredients plus Na silicate, Methyl silicate or silica sol as binder, or alternatively the ingredients may be melted together and subsequently pelletized; the "bound" or "melted" pellets have size 20-25 mm; cube briquettes of this size may also be provided. Where FeO content of the agent is high, or where Fe oxide slips into the ladle from the converter slag during pouring the steel, up to 0.4% Al or up to 0.3% Ca (based on the steel) may be added either to the ladle as alloy granules or to the slag as a reducing agent; where the melting rate of the agent is low, an "exothermic" agent may be used - a mixture of 24-29% Al + 76.71% Fe ore is added thereto, so that on reaction, Fe ore is reduced to Fe, Al 2 O 3 is produced to provide part of the above-stated amount, and Al is left in excess to reduce any FeO. Where ultra-low S steel is required, the treatment may be followed by inert gas agitation in vacuo, e.g. with Ar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB38623/75A GB1517324A (en) | 1975-09-19 | 1975-09-19 | Desulphurisation of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB38623/75A GB1517324A (en) | 1975-09-19 | 1975-09-19 | Desulphurisation of steel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1517324A true GB1517324A (en) | 1978-07-12 |
Family
ID=10404652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB38623/75A Expired GB1517324A (en) | 1975-09-19 | 1975-09-19 | Desulphurisation of steel |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1517324A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2454467A1 (en) * | 1979-04-19 | 1980-11-14 | Foseco Int | PROCESS FOR DESULFURIZING CAST IRON OR FUSED STEEL AND CORRESPONDING DESULFURIZING PRODUCTS |
| FR2492407A1 (en) * | 1980-10-21 | 1982-04-23 | Nisshin Steel Co Ltd | PROCESS FOR DEPHOSPHORIZATION, DESULFURATION AND DENITRATION OF CHROME-CONTAINING CAST IRON |
| FR2521593A1 (en) * | 1982-02-12 | 1983-08-19 | Showa Denko Kk | FUSION METAL REFINING AGENT AND PROCESS FOR PRODUCING THE SAME |
| CN101451174B (en) * | 2007-11-30 | 2010-11-03 | 大石桥市和兴耐火材料厂 | Deslagging process of unrefined steel |
| CN113234893A (en) * | 2021-04-14 | 2021-08-10 | 首钢集团有限公司 | Method for pre-refining molten steel |
| CN115305313A (en) * | 2022-09-16 | 2022-11-08 | 宝武集团鄂城钢铁有限公司 | Converter slag melting agent and preparation method and application thereof |
-
1975
- 1975-09-19 GB GB38623/75A patent/GB1517324A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2454467A1 (en) * | 1979-04-19 | 1980-11-14 | Foseco Int | PROCESS FOR DESULFURIZING CAST IRON OR FUSED STEEL AND CORRESPONDING DESULFURIZING PRODUCTS |
| FR2492407A1 (en) * | 1980-10-21 | 1982-04-23 | Nisshin Steel Co Ltd | PROCESS FOR DEPHOSPHORIZATION, DESULFURATION AND DENITRATION OF CHROME-CONTAINING CAST IRON |
| FR2521593A1 (en) * | 1982-02-12 | 1983-08-19 | Showa Denko Kk | FUSION METAL REFINING AGENT AND PROCESS FOR PRODUCING THE SAME |
| CN101451174B (en) * | 2007-11-30 | 2010-11-03 | 大石桥市和兴耐火材料厂 | Deslagging process of unrefined steel |
| CN113234893A (en) * | 2021-04-14 | 2021-08-10 | 首钢集团有限公司 | Method for pre-refining molten steel |
| CN115305313A (en) * | 2022-09-16 | 2022-11-08 | 宝武集团鄂城钢铁有限公司 | Converter slag melting agent and preparation method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |