GB1240876A - A method of treatment of liquid steel under vacuum - Google Patents
A method of treatment of liquid steel under vacuumInfo
- Publication number
- GB1240876A GB1240876A GB35917/68A GB3591768A GB1240876A GB 1240876 A GB1240876 A GB 1240876A GB 35917/68 A GB35917/68 A GB 35917/68A GB 3591768 A GB3591768 A GB 3591768A GB 1240876 A GB1240876 A GB 1240876A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- vacuum
- treatment
- steel
- windings
- 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
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
- C21C7/10—Handling in a vacuum
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)
- Furnace Details (AREA)
Abstract
1,240,876. Degassing molten steel. SOC. DES ACIERS FINS DE L'EST. July 26, 1968 [July 27, 5967], No.35917/68. Steel is vacuum treated in a ladle 9, when covered by a layer of reducing slag 16, by immersing the lower extremities of 2 vertical refractory pipes 5 and 6. The upper parts of which open into the bottom of an evacuable, vacuum-tight, refractory, heat-insulated chamber 1 of cylindrical vertical cross section. Circulation of the steel is effected up the pipe 6 and down pipe 5 by means of a centripetal electromagnetic force acting towards the centre of the vacuum chamber 1 set up by passing an A. C. current through inductor windings 7 surrounding said chamber and within the metal casing 11. These windings 7 also heat the steel in the vacuum chamber by induction, and are themselves water-cooled, and are supplied with frequencies of 1-20 Hz for providing the circulation only or higher frequencies to act as a heat source. After treatment, the vacuum is removed by introduction of a neutral or reducing gas into the chamber after each vacuum treatment. To aid the setting up of the centripetal force the upward pipe 6 opens out into the bottom of a peripheral channel 10 around the base of chamber 1, the radial width of which is less than the thickness of the induced skin effect currents in the steel. The chamber is heated internally before each treatment by means of a coaxial, graphite ring 13 located inside the chamber and heated by induction by means of winding 14 outside the refractory chamber but within the metal casing 11 supplied with frequencies in the range 150-1500 Hz. Packs of magnetic iron sheets 12 are provided between the metal casing 11 and the windings 7 and 14, to channel the electromagnetic field on the interior of the metal casing but exterior of the refractory chamber and inductor windings. The process is started by sticking diaphragms of thin steel sheet over the lower openings of pipes 5 and 6, evacuating the chamber, and heating it to the required temperature. The vacuum is destroyed by introducing nitrogen or a reducing gas to the chamber and then immersing pipes 5 and 6 into the metal bath in a ladle and evacuating, and supplying current to windings 7. Additives can be introduced via a lock chamber 18, 19, 20. After treatment the vacuum is destroyed with nitrogen or reducing gas
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR115946A FR1545666A (en) | 1967-07-27 | 1967-07-27 | New process for treating liquid steel by vacuum |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1240876A true GB1240876A (en) | 1971-07-28 |
Family
ID=8635951
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB35917/68A Expired GB1240876A (en) | 1967-07-27 | 1968-07-26 | A method of treatment of liquid steel under vacuum |
Country Status (11)
Country | Link |
---|---|
US (1) | US3737302A (en) |
AT (1) | AT288458B (en) |
BE (1) | BE718095A (en) |
CS (1) | CS152301B2 (en) |
DE (1) | DE1758696B1 (en) |
ES (1) | ES356521A1 (en) |
FR (1) | FR1545666A (en) |
GB (1) | GB1240876A (en) |
LU (1) | LU56511A1 (en) |
NL (1) | NL156444B (en) |
SE (1) | SE357003B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4104057A (en) * | 1972-06-10 | 1978-08-01 | Hermann Maas | Method for making low carbon high chromium alloyed steels |
US4212665A (en) * | 1978-07-27 | 1980-07-15 | Special Metals Corporation | Decarburization of metallic alloys |
US4298376A (en) * | 1980-04-14 | 1981-11-03 | Kobe Steel, Ltd. | Method for treating molten steel and apparatus therefor |
FR2480785A1 (en) * | 1980-04-18 | 1981-10-23 | Kobe Steel Ltd | Treatment of molten steel in ladle - where linear motors are used to transfer steel to overhead auxiliary vessel for vacuum degassing and/or alloying (AT 15.5.81) |
LU84093A1 (en) * | 1982-04-16 | 1983-12-16 | Arbed | DEVICE FOR METALLURGIC TREATING OF LIQUID METALS |
US5091000A (en) * | 1987-12-25 | 1992-02-25 | Nkk Corporation | Method for cleaning molten metal and apparatus therefor |
DE4114607C2 (en) * | 1991-05-04 | 1998-12-17 | Vacmetal Gmbh | Method and device for circulating degassing of steel |
DE10196303B3 (en) * | 2000-06-05 | 2014-11-13 | Sanyo Special Steel Co., Ltd. | Process for producing a high purity steel |
JP5235038B2 (en) * | 2011-04-12 | 2013-07-10 | パナソニック株式会社 | Thermoelectric conversion device manufacturing apparatus and manufacturing method |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2994602A (en) * | 1958-10-03 | 1961-08-01 | Yawata Iron & Steel Co | Method of vacuum degasifying molten steel by circulation |
-
1967
- 1967-07-27 FR FR115946A patent/FR1545666A/en not_active Expired
-
1968
- 1968-07-15 US US00744744A patent/US3737302A/en not_active Expired - Lifetime
- 1968-07-15 BE BE718095D patent/BE718095A/xx not_active IP Right Cessation
- 1968-07-16 LU LU56511D patent/LU56511A1/xx unknown
- 1968-07-24 AT AT717768A patent/AT288458B/en not_active IP Right Cessation
- 1968-07-24 DE DE19681758696 patent/DE1758696B1/en active Pending
- 1968-07-26 GB GB35917/68A patent/GB1240876A/en not_active Expired
- 1968-07-26 NL NL6810697.A patent/NL156444B/en not_active IP Right Cessation
- 1968-07-26 CS CS5476A patent/CS152301B2/cs unknown
- 1968-07-26 ES ES356521A patent/ES356521A1/en not_active Expired
- 1968-07-26 SE SE10192/68A patent/SE357003B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
US3737302A (en) | 1973-06-05 |
AT288458B (en) | 1971-03-10 |
BE718095A (en) | 1968-12-16 |
NL6810697A (en) | 1969-01-29 |
NL156444B (en) | 1978-04-17 |
DE1758696B1 (en) | 1971-12-23 |
FR1545666A (en) | 1968-11-15 |
SE357003B (en) | 1973-06-12 |
CS152301B2 (en) | 1973-12-19 |
ES356521A1 (en) | 1970-04-01 |
LU56511A1 (en) | 1968-10-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2253421A (en) | Method and apparatus for deoxidizing and degasifying liquid steel | |
US4108236A (en) | Floating heat insulating baffle for directional solidification apparatus utilizing liquid coolant bath | |
US3300565A (en) | Vacuum induction furnace | |
GB1240876A (en) | A method of treatment of liquid steel under vacuum | |
US3501290A (en) | Method of treating molten metal with arc heat and vacuum | |
GB2515632A (en) | Method and apparatus for reducing bubbles or gas pockets in a metal ingot using a continuous casting mold | |
US3268963A (en) | Casting of metal ingots | |
GB1208332A (en) | Method of treating nodular cast iron | |
CN109207675B (en) | A kind of channel-type induction heating single tube RH purifier and method | |
GB1427220A (en) | Method and apparatus for smelting and casting metals | |
JPS62134143A (en) | Vacuum induction furnace | |
US3239204A (en) | Vacuum degassing apparatus | |
US3700779A (en) | Method of treatment of liquid steel under vacuum | |
ES467377A1 (en) | Process and installation for heat treating spheroidal or lamellar graphite cast iron pipes | |
US3452973A (en) | Vacuum degasifying apparatus with electromagnetic stirring means | |
US3729307A (en) | Method and apparatus for electroslag remelting of metals,particularly steel | |
GB705856A (en) | Process for the continuous casting of metallic materials | |
US3520980A (en) | Crucible for heat treatment of conductive materials | |
CN106319157B (en) | RH refining induction heating temperature compensation device and use method thereof | |
US3022059A (en) | Apparatus for treating metal melts | |
JPS58207312A (en) | Liquefied metal metallurgical treating method and device | |
US3382912A (en) | Apparatus for conserving heat, degassing and casting molten metal | |
JP2983327B2 (en) | Vacuum refining equipment | |
CN220250640U (en) | High-purity silicon smelting equipment | |
JPS6013014A (en) | Ladle refining device |