FR2433581A1 - Deoxidising, desulphurising and refining steel - by means of a liquid slag and aluminium additions - Google Patents
Deoxidising, desulphurising and refining steel - by means of a liquid slag and aluminium additionsInfo
- Publication number
- FR2433581A1 FR2433581A1 FR7919235A FR7919235A FR2433581A1 FR 2433581 A1 FR2433581 A1 FR 2433581A1 FR 7919235 A FR7919235 A FR 7919235A FR 7919235 A FR7919235 A FR 7919235A FR 2433581 A1 FR2433581 A1 FR 2433581A1
- Authority
- FR
- France
- Prior art keywords
- slag
- vessel
- metal
- steel
- reduces
- 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.)
- Granted
Links
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
-
- 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
- C21C7/0056—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00 using cored wires
-
- 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
- C21C7/06—Deoxidising, e.g. killing
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
The deoxidation, desulphurisation and refining of steel in a casting vessel involves the injection of Al, an alkaline-earth and of other powder products into a vessel provided with a basic lining. Before the metal is cast, a predetermined quantity of a fluid basic slag is provided in the base of the vessel, the slag being free of oxides and sulphates and eventually contg. deoxidising and refining agents so that a slag is formed contg. little iron and other oxides, but rich than normal. The process further involves casting the metal while avoiding the arrival of the converter refining slag, stirring the metal and the slag deoxidised by means of argon; and adding Ca alloys in several stages and as near as possible to the base of the vessel. The process (a) reduces the residual quantity of Al in the steel (b) reduces the sulphur content in the steel (c) reduces the quantity of non-metallic inclusions, (d) enables the clean metal with increased castability at a controlled casting temperature.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE869298 | 1978-07-27 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2433581A1 true FR2433581A1 (en) | 1980-03-14 |
FR2433581B1 FR2433581B1 (en) | 1984-05-04 |
Family
ID=3861688
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7919235A Granted FR2433581A1 (en) | 1978-07-27 | 1979-07-19 | Deoxidising, desulphurising and refining steel - by means of a liquid slag and aluminium additions |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2433581A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2034736A1 (en) * | 1969-03-07 | 1970-12-11 | Nippon Kokan Kk | |
FR2051745A1 (en) * | 1969-07-15 | 1971-04-09 | Asea Ab | |
DE2205206A1 (en) * | 1972-02-04 | 1973-08-16 | Finkl & Sons Co | Steel desulphurization - effected outside the smelting vessel to maximise refining efficiency |
FR2184456A1 (en) * | 1972-05-15 | 1973-12-28 | Morival Fernand | Killing continuously cast steel - by two phase aluminium injection in a casting ladle using continuous aluminium strip |
FR2314787A1 (en) * | 1975-06-18 | 1977-01-14 | Thyssen Niederrhein Ag | PROCESS FOR THE PRODUCTION OF A STEEL MELT FOR THE CONTINUOUS CASTING PROCESS |
DE2545340A1 (en) * | 1975-10-09 | 1977-04-14 | Sumitomo Metal Ind | Desulphurisation of basic converter steel - in the ladle by addn. of a granular mixt. of lime, aluminium oxide and calcium fluoride |
-
1979
- 1979-07-19 FR FR7919235A patent/FR2433581A1/en active Granted
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2034736A1 (en) * | 1969-03-07 | 1970-12-11 | Nippon Kokan Kk | |
FR2051745A1 (en) * | 1969-07-15 | 1971-04-09 | Asea Ab | |
DE2205206A1 (en) * | 1972-02-04 | 1973-08-16 | Finkl & Sons Co | Steel desulphurization - effected outside the smelting vessel to maximise refining efficiency |
FR2184456A1 (en) * | 1972-05-15 | 1973-12-28 | Morival Fernand | Killing continuously cast steel - by two phase aluminium injection in a casting ladle using continuous aluminium strip |
FR2314787A1 (en) * | 1975-06-18 | 1977-01-14 | Thyssen Niederrhein Ag | PROCESS FOR THE PRODUCTION OF A STEEL MELT FOR THE CONTINUOUS CASTING PROCESS |
DE2545340A1 (en) * | 1975-10-09 | 1977-04-14 | Sumitomo Metal Ind | Desulphurisation of basic converter steel - in the ladle by addn. of a granular mixt. of lime, aluminium oxide and calcium fluoride |
Also Published As
Publication number | Publication date |
---|---|
FR2433581B1 (en) | 1984-05-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CL | Concession to grant licences | ||
ST | Notification of lapse |