FR2173717A2 - Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres - Google Patents
Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeresInfo
- Publication number
- FR2173717A2 FR2173717A2 FR7206824A FR7206824A FR2173717A2 FR 2173717 A2 FR2173717 A2 FR 2173717A2 FR 7206824 A FR7206824 A FR 7206824A FR 7206824 A FR7206824 A FR 7206824A FR 2173717 A2 FR2173717 A2 FR 2173717A2
- Authority
- FR
- France
- Prior art keywords
- double
- carbon
- tuyeres
- decarburising
- blowing
- 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
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/005—Manufacture of stainless steel
-
- 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
- C21C7/068—Decarburising
- C21C7/0685—Decarburising of stainless steel
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
Process for decarburising chrome steels esp. stainless steels by blowing the melt with diluted carbon monoxide from tuyeres having double or triple feed. The triple feed comprises an oxidising stream at the centre, a dilutant fed around it and a carbon bearing fluid at the periphery. In the double feed the oxidant and the dilutant are combined. The oxidising stream is industrially pure O2 or a gas contg. O2. The diluent is a neutral gas, argon, steam, etc. The carbon contg. fluid is fuel oil or a mixt of fuel oil/argon/steam. The fuel oil/oxygen wt. ratio is 1-10% but pref. 2.5-4%. The steel may be vacuum decarburised or decarburised under reduced pressure. By means of separate feeds the CO dilution can be controlled as well as the wear on the tuyeres by controlling the carbon contg. fluid flow.
Priority Applications (12)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7206824A FR2173717A2 (en) | 1972-02-29 | 1972-02-29 | Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres |
BE781241A BE781241A (en) | 1971-05-28 | 1972-03-24 | REFINING PROCESS FOR ALLIED STEELS CONTAINING CHROME AND MORE SPECIFICALLY STAINLESS STEELS |
LU65052D LU65052A1 (en) | 1971-05-28 | 1972-03-27 | |
DE19722215435 DE2215435B2 (en) | 1971-05-28 | 1972-03-29 | PROCESS FOR MANUFACTURING CHROME CONTAINING STEEL ALLOYS, IN PARTICULAR STAINLESS STEELS |
IT68042/72A IT954593B (en) | 1971-05-28 | 1972-04-01 | REFINING PROCESS OF ALLOY STEELS CONTAINING CHROME AND MORE ESPECIALLY OF STAINLESS STEELS |
US00247315A US3844768A (en) | 1971-05-28 | 1972-04-25 | Process for refining alloy steels containing chromium and including stainless steels |
GB1914972A GB1354853A (en) | 1971-05-28 | 1972-04-25 | Decarburisation of alloy steels |
AU41733/72A AU467460B2 (en) | 1971-05-28 | 1972-05-01 | Process for refining alloy steels containing chromium |
CA143,359A CA971755A (en) | 1971-05-28 | 1972-05-26 | Procede d'affinage des aciers allies contenant du chrome |
JP47053296A JPS5147133B1 (en) | 1971-05-28 | 1972-05-29 | |
JP48014562A JPS50110923A (en) | 1971-05-28 | 1973-02-05 | |
CA180,256A CA983721A (en) | 1971-05-28 | 1973-09-04 | Procede d'affinage des fontes et aciers contenant du chrome |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7206824A FR2173717A2 (en) | 1972-02-29 | 1972-02-29 | Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2173717A2 true FR2173717A2 (en) | 1973-10-12 |
FR2173717B2 FR2173717B2 (en) | 1976-07-09 |
Family
ID=9094305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7206824A Granted FR2173717A2 (en) | 1971-05-28 | 1972-02-29 | Decarburising chrome steels by blowing with diluted carbon - monoxide through double/triple feed tuyeres |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2173717A2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2385467A1 (en) * | 1977-03-31 | 1978-10-27 | Union Carbide Corp | PROCESS FOR THE PRODUCTION OF FINISHED MOLDED PARTS |
-
1972
- 1972-02-29 FR FR7206824A patent/FR2173717A2/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2385467A1 (en) * | 1977-03-31 | 1978-10-27 | Union Carbide Corp | PROCESS FOR THE PRODUCTION OF FINISHED MOLDED PARTS |
Also Published As
Publication number | Publication date |
---|---|
FR2173717B2 (en) | 1976-07-09 |
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