US3517727A - Apparatus for continuously casting and refining a metal in a bottomless mold - Google Patents
Apparatus for continuously casting and refining a metal in a bottomless mold Download PDFInfo
- Publication number
- US3517727A US3517727A US693954A US3517727DA US3517727A US 3517727 A US3517727 A US 3517727A US 693954 A US693954 A US 693954A US 3517727D A US3517727D A US 3517727DA US 3517727 A US3517727 A US 3517727A
- Authority
- US
- United States
- Prior art keywords
- metal
- slag
- refining
- mould
- continuously casting
- 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
- 239000002184 metal Substances 0.000 title description 21
- 229910052751 metal Inorganic materials 0.000 title description 21
- 238000007670 refining Methods 0.000 title description 11
- 238000005266 casting Methods 0.000 title description 9
- 239000002893 slag Substances 0.000 description 26
- 239000007788 liquid Substances 0.000 description 7
- 238000000605 extraction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000011265 semifinished product Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- KEUKAQNPUBYCIC-UHFFFAOYSA-N ethaneperoxoic acid;hydrogen peroxide Chemical compound OO.CC(=O)OO KEUKAQNPUBYCIC-UHFFFAOYSA-N 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241001387976 Pera Species 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/16—Remelting metals
- C22B9/18—Electroslag remelting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
Definitions
- a process for continuously casting and refining a metal comprising the steps of introducing slag into a cooled, bottomless, casting mould above the metal level, maintaining the slag in liquid form, and changing the slag by the addition and extraction of slag at a location above the liquid metal level.
- apparatus for continuously casting and refining a metal comprising a bottomless mould in which the metal is to be cast, means for cooling the mould, means for introducing slag into the mould above the metal level in the mould, means for maintaining the slag in liquid form, and means for changing the slag in the mould.
- FIG. 1 is a vertical section through apparatus according to the invention, permitting continuous casting and refining of the metal, and
- FIG. 2 is a section on a line II-1T in FIG. 1.
- the apparatus shown in the drawings has a mould 1 of copper, cooled internally by Water circulating in ducts 2.
- the semi-finished metal product 3, obtained by solidification of the metal in the mould, is drawn downwards by a withdrawal machine, which may be of conventional type.
- the semifinished product includes a portion 4 which is still liquid and which is supplied by a feed jet 5. This jet, in a known manner, is eccentric relative to the product 3.
- the installation also includes a duct 6 supplying a stream 7 of electrically conductive slag which goes on top of the product 3, forming a layer 8 protecting the metal.
- the mould 1 and tubular mandrel 9 are connected to the terminals of an electric power supply, for example a single-phase alternating-current power supply.
- the molten metal arriving in the form of a jet 5 traverses the slag layer 8 and flows, by gravity, to feed the liquid portion which is to form the semi-finished product by solidification.
- the slag is selected so that while the metal passes through it, the metal is subjected to the high degree of refining which reduces the contents of gas and certain other impurities such as sulphur, and which eliminates non-metallic inclusions.
- the slag retains its effectiveness because it is continuously replaced, since the duct 6 supplies it above the semi-finished product formed and since it is continuously extracted by exhausting along the mandrel 9.
- the layer of electrically conductive slag must be thick enough to allow correct refining of the metal traversing it.
- a suitable thickness may, for example, be of the order of 100 mm. for a mould whose largest dimension is of the order of 200 mm.
- composition of the slag depends of course the refining required and the grade of steel cast.
- the process improves not only the purity and quality of the steels or alloys cast, but also the quality of the casting skin.
- Apparatus for continuously casting and refining a metal comprising a bottomless mould in which the metal is to be cast, means for cooling the mould, means for introducing slag into the mould above the metal level in the-mould, means for maintaining the slag in liquid form, and means for changing the slag in the mould including a tubular mandrel for dipping into the slag and defining a duct for the passage of slag therethrough, and an extraction device connected to said duct to remove slag from the mould.
- Apparatus as claimed in claim 1, wherein the means for maintaining the slag in liquid form includes a heating device.
- heating device comprises an electrical circuit connected to the tubular mandrel and to the mould, the slag being electrically conductive.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Continuous Casting (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Furnace Details (AREA)
Description
June 30, 1970 BABEL APPARATUS FOR CONTINUOUSLY CASTING AND REFINING A METAL IN A BOTTOMLESS MOLD Filed Dec. 27, 1967 United States Patent APPARATUS FOR CONTINUOUSLY CASTING AND REFINING A METAL IN A BOTTOM- LESS MOLD Louis Babel, Sauvigny-les-Bois, France, assignor to Societe Metallurgique dlmphy, Paris, France, a company of France Filed Dec. 27, 1967, Ser. No. 693,954 Claims priority, application France, Jan. 6, 1967,
Int. Cl. B2241 27/02, 11/10 US. Cl. 164250 3 Claims ABSTRACT OF THE DISCLOSURE This invention relates to a process and apparatus for continuously casting and refining a metal.
According to the invention, there is provided a process for continuously casting and refining a metal comprising the steps of introducing slag into a cooled, bottomless, casting mould above the metal level, maintaining the slag in liquid form, and changing the slag by the addition and extraction of slag at a location above the liquid metal level.
According to the invention, there is also provided apparatus for continuously casting and refining a metal, comprising a bottomless mould in which the metal is to be cast, means for cooling the mould, means for introducing slag into the mould above the metal level in the mould, means for maintaining the slag in liquid form, and means for changing the slag in the mould.
Features and advantages of the invention will be apparent from the following description of an embodiment thereof given, by way of example, in conjunction with the accompanying drawings, wherein:
FIG. 1 is a vertical section through apparatus according to the invention, permitting continuous casting and refining of the metal, and
FIG. 2 is a section on a line II-1T in FIG. 1.
The apparatus shown in the drawings has a mould 1 of copper, cooled internally by Water circulating in ducts 2. The semi-finished metal product 3, obtained by solidification of the metal in the mould, is drawn downwards by a withdrawal machine, which may be of conventional type. The semifinished product includes a portion 4 which is still liquid and which is supplied by a feed jet 5. This jet, in a known manner, is eccentric relative to the product 3.
The installation also includes a duct 6 supplying a stream 7 of electrically conductive slag which goes on top of the product 3, forming a layer 8 protecting the metal.
The lower end of a metal mandrel 9, made of copper and cooled by a fluid coolant such as water circulating in internal ducts 10, dips into the layer 8 of electrically conductive slag.
3,517,727 Patented June 30, 1970 "ice An axial portion 11 of the mandrel forms a tube for extracting the slag from the layer 8. The slag is exhausted by a device 12, for example a pump or an extraction device with an ejector of a known type.
{The mould 1 and tubular mandrel 9 are connected to the terminals of an electric power supply, for example a single-phase alternating-current power supply.
Since the lower end of the-tubular mandrel 9 dips into the slag layer 8, the slag is kept in the liquid state by heating due to the Joule effect, the electric current passing between the mandrel 9 and mould '1.
The molten metal arriving in the form of a jet 5 traverses the slag layer 8 and flows, by gravity, to feed the liquid portion which is to form the semi-finished product by solidification. The slag is selected so that while the metal passes through it, the metal is subjected to the high degree of refining which reduces the contents of gas and certain other impurities such as sulphur, and which eliminates non-metallic inclusions.
The slag retains its effectiveness because it is continuously replaced, since the duct 6 supplies it above the semi-finished product formed and since it is continuously extracted by exhausting along the mandrel 9. The layer of electrically conductive slag must be thick enough to allow correct refining of the metal traversing it. A suitable thickness may, for example, be of the order of 100 mm. for a mould whose largest dimension is of the order of 200 mm.
The composition of the slag depends of course the refining required and the grade of steel cast.
It should be noted that the process improves not only the purity and quality of the steels or alloys cast, but also the quality of the casting skin.
What is claimed is:
1. Apparatus for continuously casting and refining a metal, comprising a bottomless mould in which the metal is to be cast, means for cooling the mould, means for introducing slag into the mould above the metal level in the-mould, means for maintaining the slag in liquid form, and means for changing the slag in the mould including a tubular mandrel for dipping into the slag and defining a duct for the passage of slag therethrough, and an extraction device connected to said duct to remove slag from the mould.
2. Apparatus as claimed in claim 1, wherein the means for maintaining the slag in liquid form includes a heating device.
3. Apparatus as claimed in claim 1, wherein the heating device comprises an electrical circuit connected to the tubular mandrel and to the mould, the slag being electrically conductive.
References Cited UNITED STATES PATENTS 3,411,566 11/1968 Astrou et al. 164281 2,369,233 2/1945 Hopkins 164-52 2,375,107 5/1945 Hopkins 164-82 X 3,234,608 2/1966 Peras 164-52 3,344,839 10/ 1967 Sunnen 164-52 J. SPENCER OVERHOLSER, Primary Examiner R. S. ANNEAR, Assistant Examiner US. Cl. X.R.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR90258A FR1513573A (en) | 1967-01-06 | 1967-01-06 | Method and device for refining metal in a continuous casting plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3517727A true US3517727A (en) | 1970-06-30 |
Family
ID=8623498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US693954A Expired - Lifetime US3517727A (en) | 1967-01-06 | 1967-12-27 | Apparatus for continuously casting and refining a metal in a bottomless mold |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US3517727A (en) |
| BE (1) | BE706892A (en) |
| DE (1) | DE1608082C3 (en) |
| ES (1) | ES348062A1 (en) |
| FR (1) | FR1513573A (en) |
| GB (1) | GB1198290A (en) |
| SE (1) | SE327261B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3669178A (en) * | 1969-06-09 | 1972-06-13 | Continental Ore Corp | Direct reduction process and simultaneous continuous casting of metallic materials in a crucible to form rods |
| US4099965A (en) * | 1975-09-26 | 1978-07-11 | Servimetal | Method of using MgCl2 -KCl flux for purification of an aluminum alloy preparation |
| US4160662A (en) * | 1976-06-11 | 1979-07-10 | Kubota, Ltd. | Method for the removal of scum |
| US4595045A (en) * | 1982-03-05 | 1986-06-17 | Societe Lorraine De Laminage Continu-Sollac (Societe Anonyme) | Method and device for supplying and controlling the layer of flux powder in a continuous casting mold |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2460171A1 (en) * | 1979-06-29 | 1981-01-23 | Inst Elektroswarki Patona | Electroslag remelting of large solid ingots - where axial cooling device lowered into molten metal pool produces fine crystals in middle of ingot |
| AT399463B (en) * | 1987-03-03 | 1995-05-26 | Inteco Int Techn Beratung | METHOD FOR CONTINUOUSLY CASTING ELECTRIC STEEL AND ALLOYS |
| AT406384B (en) * | 1996-01-29 | 2000-04-25 | Inteco Int Techn Beratung | METHOD FOR ELECTROSHELL STRAND MELTING OF METALS |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2369233A (en) * | 1943-01-26 | 1945-02-13 | Kellogg M W Co | Method and apparatus for producing metal |
| US2375107A (en) * | 1941-06-26 | 1945-05-01 | Kellogg M W Co | Method and apparatus for the continuous production of metal |
| US3234608A (en) * | 1959-11-19 | 1966-02-15 | Renault | Continuous-casting method of melting metals in a slag medium by using consumable electrodes |
| US3344839A (en) * | 1963-11-28 | 1967-10-03 | Soudure Electr Autogene | Process for obtaining a metallic mass by fusion |
| US3411566A (en) * | 1967-02-20 | 1968-11-19 | Astrov Evgeny Ivanovitch | Device for supplying powdered material into a mold of a continuous casting machine |
-
1967
- 1967-01-06 FR FR90258A patent/FR1513573A/en not_active Expired
- 1967-11-22 BE BE706892D patent/BE706892A/xx unknown
- 1967-12-05 GB GB55361/67A patent/GB1198290A/en not_active Expired
- 1967-12-06 SE SE16755/67A patent/SE327261B/xx unknown
- 1967-12-07 ES ES348062A patent/ES348062A1/en not_active Expired
- 1967-12-27 US US693954A patent/US3517727A/en not_active Expired - Lifetime
-
1968
- 1968-01-04 DE DE1608082A patent/DE1608082C3/en not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2375107A (en) * | 1941-06-26 | 1945-05-01 | Kellogg M W Co | Method and apparatus for the continuous production of metal |
| US2369233A (en) * | 1943-01-26 | 1945-02-13 | Kellogg M W Co | Method and apparatus for producing metal |
| US3234608A (en) * | 1959-11-19 | 1966-02-15 | Renault | Continuous-casting method of melting metals in a slag medium by using consumable electrodes |
| US3344839A (en) * | 1963-11-28 | 1967-10-03 | Soudure Electr Autogene | Process for obtaining a metallic mass by fusion |
| US3411566A (en) * | 1967-02-20 | 1968-11-19 | Astrov Evgeny Ivanovitch | Device for supplying powdered material into a mold of a continuous casting machine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3669178A (en) * | 1969-06-09 | 1972-06-13 | Continental Ore Corp | Direct reduction process and simultaneous continuous casting of metallic materials in a crucible to form rods |
| US4099965A (en) * | 1975-09-26 | 1978-07-11 | Servimetal | Method of using MgCl2 -KCl flux for purification of an aluminum alloy preparation |
| US4160662A (en) * | 1976-06-11 | 1979-07-10 | Kubota, Ltd. | Method for the removal of scum |
| US4595045A (en) * | 1982-03-05 | 1986-06-17 | Societe Lorraine De Laminage Continu-Sollac (Societe Anonyme) | Method and device for supplying and controlling the layer of flux powder in a continuous casting mold |
Also Published As
| Publication number | Publication date |
|---|---|
| BE706892A (en) | 1968-04-01 |
| DE1608082A1 (en) | 1972-03-02 |
| SE327261B (en) | 1970-08-17 |
| FR1513573A (en) | 1968-02-16 |
| ES348062A1 (en) | 1969-06-16 |
| GB1198290A (en) | 1970-07-08 |
| DE1608082C3 (en) | 1973-10-31 |
| DE1608082B2 (en) | 1973-03-15 |
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