EP0049556A1 - Strip casting apparatus with heated orifice - Google Patents
Strip casting apparatus with heated orifice Download PDFInfo
- Publication number
- EP0049556A1 EP0049556A1 EP81302065A EP81302065A EP0049556A1 EP 0049556 A1 EP0049556 A1 EP 0049556A1 EP 81302065 A EP81302065 A EP 81302065A EP 81302065 A EP81302065 A EP 81302065A EP 0049556 A1 EP0049556 A1 EP 0049556A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- orifice passage
- tundish
- cavity
- lance
- molten metal
- 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.)
- Withdrawn
Links
- 238000005266 casting Methods 0.000 title claims abstract description 51
- 229910052751 metal Inorganic materials 0.000 claims abstract description 41
- 239000002184 metal Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 31
- 239000007789 gas Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 8
- 238000002485 combustion reaction Methods 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 239000010439 graphite Substances 0.000 claims description 11
- 229910002804 graphite Inorganic materials 0.000 claims description 11
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 8
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- 239000004927 clay Substances 0.000 claims description 8
- 238000012546 transfer Methods 0.000 claims description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 6
- 229910052582 BN Inorganic materials 0.000 claims description 5
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 5
- 229910052570 clay Inorganic materials 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 5
- 229910052580 B4C Inorganic materials 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 4
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 4
- 239000001095 magnesium carbonate Substances 0.000 claims description 4
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 claims description 4
- 229910000021 magnesium carbonate Inorganic materials 0.000 claims description 4
- 235000014380 magnesium carbonate Nutrition 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000010453 quartz Substances 0.000 claims description 4
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 4
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 5
- 239000005995 Aluminium silicate Substances 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000011094 fiberboard Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/064—Accessories therefor for supplying molten metal
Definitions
- the present invention relates to a strip casting apparatus and method for the rapid casting of metallic strip material. More particularly, the present invention is directed to a method and apparatus comprising a tundish assembly wherein an orifice of the tundish is able to be heated prior to, and/or during a strip casting operation.
- the nozzle or orifice passage through which molten metal passes to a casting surface is a critical feature.
- the slot defining the orifice passage must have a substantially uniform width dimension across the longitudinal extent thereof.
- the spacing of the orifice lips from a casting surface during a casting operation is also important.
- the maintenance of the slot dimensions during a casting operation and minimizing the possibilities of the orifice passage freezing during a casting operation have become more critical considerations as the width of the strip material, and likewise the overall width of the orifice passage, increases.
- a new and improved apparatus for casting metallic strip material which ensures that the orifice passage dimensions are maintained throughout a casting operation, and that the possibilities of the orifice passage freezing during a casting operation are minimized.
- the present invention provides strip casting apparatus comprising a tundish for receiving and holding molten metal, and an orifice passage defined between two spaced lips in the tundish through which molten metal is delivered to a casting surface located within 3.048mm (0.120 inch) of the orifice passage and movable past the orifice passage at a rate of from 61 to 3048 metres (200 to 10,000 linear surface feet) per minute wherein the improvement comprises:
- the present invention also provides a method of casting metal strip which comprises delivering molten metal in a tundish through an orifice passage defined between two spaced lips in the tundish onto a casting surface located within 3.048mm (0.120 inch) of the orifice passage and moving past the orifice passage at a surface speed of from 61 to 3048 metres (200 to 10,000 feet) per minute, characterized in that:
- molten metal is delivered from the orifice passage 14 onto the outer peripheral surface 16 of a water cooled precipitation hardened copper alloy wheel containing about 99% copper.
- Copper and copper alloys are chosen for their high thermal conductivity and wear resistance although other materials may be utilized for the casting surface 16.
- the casting surface 16, whether round, flat or ovular, is movable past the nozzle at a speed of from 61 to 3048 metres (200 to about 10,000 linear surface feet) per minute.
- the blocks utilized in a preferred apparatus of the present invention must be of a material which is resistant to molten metal attack.
- refractory boards such as insulating boards made from fiberized kaolin are suitable. Additional materials including graphite, clay graphite, fire clay, quartz, boron nitride, silicon nitride, silicon carbide, boron carbide, alumina, zirconia, stabilized zirconium silicate, alumina, silica, magnesia, chrome magnesite, amd combinations of such materials may also be used to construct such blocks.
- the tundish 10 of the present invention typically includes a molten metal pouring passage 12 consisting of at least one introductory passage portion 32.
- the introductory passage portion 32 extends through the tundish and is in communication with a base portion 34 formed in a hollow section at a lower portion of the tundish 10.
- the opening for the introductory passage 32 is preferably located in an upper surface of the tundish as shown in Figures 1 and 3, however, such opening may be disposed elsewhere. Also, as shown in Figures it is preferred that the opening be slightly radiused into a funnel shaped structure to facilitate metal transfer therethrough.
- the orifice passage 14 through which molten metal is fed onto the casting surface 16 has a substantially uniform width dimension, W, throughout the longitudinal extent thereof.
- W width dimension
- Such width dimension, W is at least 0.254mm (0.010 inch) and is less than 3.048mm (.120 inch), or more preferably less than 2.032mm (.080 inch).
- width dimension, W is within the range of from 0.508 to 1.524 mm (0.020 to 0.060 inch), and even more preferably from 0.762 to 1.27mm (0.030 to 0.050 inch).
- the orifice passage 14 may be constructed in a number of ways in the apparatus of the present invention.
- at least one lip defining the orifice passage 14 consists of a molten metal resistant sheet or plate.
- the orifice passage 14 may be formed between a bottom surface of a plate 40 defining the upper lip 18 of the nozzle 14, and a portion of the front wall of the tundish lO, defining the lower lip 19 of the nozzle 14.
- the orifice passage 14 could alternatively be formed between a lower plate and the tundish 10, or between two facing plates. Regardless of which method is used to provide the orifice passage 14 the strict dimensional tolerances mentioned above must be maintained.
- At least one cavity is provided in the tundish 10 adjacent at least a portion of .the material defining at least one of the lips of the orifice passage 14.
- Such cavity may consist of the bottom portion of a chimney or aperture 46 which is discussed below.
- such cavity may be provided to extend between multiple apertures as shown in Figures 2 and 4.
- such cavity may be provided in the tundish 10 across substantially the complete extent of the material defining one of the lips of the orifice passage as shown in Figure 5.
- a plate 40 and/or 70 defines at least one of the lips of the orifice passage.
- a portion of the tundish material which is adjacent the outside surface of such plate, with respect to the orifice passage 14 may be removed to provide the required cavity.
- any number of lances or lances with any number of multiple tips may be employed usually dependent upon the.. width of the strip to be cast from the tundish 10.
- sufficient heat is provided and maintained in the cavity to cause heat transfer through the tundish materials to the corresponding lip of the orifice passage 14 to keep the nozzle hot before and during strip casting.
- a plate 40 and/or 70 is utilized the temperature of the entire plate 40 can be raised to the desired level prior to the initiation of a strip casting operation.
- a lance is provided for every 50 to 76mm (2.0 to 3.0 inches) of width of the orifice passaae 14.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Cartons (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19409780A | 1980-10-06 | 1980-10-06 | |
| US194097 | 1994-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0049556A1 true EP0049556A1 (en) | 1982-04-14 |
Family
ID=22716287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81302065A Withdrawn EP0049556A1 (en) | 1980-10-06 | 1981-05-08 | Strip casting apparatus with heated orifice |
Country Status (14)
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0595058A1 (de) * | 1992-10-10 | 1994-05-04 | Sundwiger Eisenhütte Maschinenfabrik GmbH & Co. | Vorrichtung zum Bandgiessen aus einem Giessgefäss und einem Paar einen Giessspalt bildenden gekühlten Giessrädern |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB521689A (en) * | 1938-08-22 | 1940-05-29 | Joseph Marcel Merle | Improvements relating to apparatus for making products derived from molten metal |
| US4142571A (en) * | 1976-10-22 | 1979-03-06 | Allied Chemical Corporation | Continuous casting method for metallic strips |
| EP0040072B1 (en) * | 1980-05-09 | 1984-05-30 | Battelle Development Corporation | Apparatus for strip casting |
-
1981
- 1981-04-14 YU YU00971/81A patent/YU97181A/xx unknown
- 1981-04-29 AU AU69975/81A patent/AU6997581A/en not_active Abandoned
- 1981-05-04 KR KR1019810001551A patent/KR850000468B1/ko not_active Expired
- 1981-05-05 HU HU811176A patent/HU183422B/hu unknown
- 1981-05-07 BR BR8102816A patent/BR8102816A/pt unknown
- 1981-05-07 RO RO104230A patent/RO83019B/ro unknown
- 1981-05-08 CA CA000377258A patent/CA1183321A/en not_active Expired
- 1981-05-08 EP EP81302065A patent/EP0049556A1/en not_active Withdrawn
- 1981-05-08 MX MX187192A patent/MX155524A/es unknown
- 1981-05-08 AT AT0206081A patent/AT384764B/de not_active IP Right Cessation
- 1981-05-08 NO NO811580A patent/NO811580L/no unknown
- 1981-05-08 JP JP56068443A patent/JPS5764455A/ja active Granted
- 1981-05-08 PL PL23104481A patent/PL231044A1/xx unknown
- 1981-05-08 ES ES502054A patent/ES8304823A1/es not_active Expired
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB521689A (en) * | 1938-08-22 | 1940-05-29 | Joseph Marcel Merle | Improvements relating to apparatus for making products derived from molten metal |
| US4142571A (en) * | 1976-10-22 | 1979-03-06 | Allied Chemical Corporation | Continuous casting method for metallic strips |
| EP0040072B1 (en) * | 1980-05-09 | 1984-05-30 | Battelle Development Corporation | Apparatus for strip casting |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0595058A1 (de) * | 1992-10-10 | 1994-05-04 | Sundwiger Eisenhütte Maschinenfabrik GmbH & Co. | Vorrichtung zum Bandgiessen aus einem Giessgefäss und einem Paar einen Giessspalt bildenden gekühlten Giessrädern |
Also Published As
| Publication number | Publication date |
|---|---|
| KR850000468B1 (ko) | 1985-04-08 |
| PL231044A1 (enrdf_load_stackoverflow) | 1982-04-13 |
| ATA206081A (de) | 1987-06-15 |
| YU97181A (en) | 1984-08-31 |
| ES502054A0 (es) | 1983-03-16 |
| HU183422B (en) | 1984-05-28 |
| AU6997581A (en) | 1982-04-22 |
| MX155524A (es) | 1988-03-24 |
| RO83019A (ro) | 1984-01-14 |
| BR8102816A (pt) | 1982-08-24 |
| AT384764B (de) | 1988-01-11 |
| JPS5764455A (en) | 1982-04-19 |
| KR830005938A (ko) | 1983-09-14 |
| RO83019B (ro) | 1984-01-30 |
| NO811580L (no) | 1982-04-07 |
| JPH0341259B2 (enrdf_load_stackoverflow) | 1991-06-21 |
| ES8304823A1 (es) | 1983-03-16 |
| CA1183321A (en) | 1985-03-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): BE DE FR GB IT SE |
|
| 17P | Request for examination filed |
Effective date: 19820827 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN |
|
| 18W | Application withdrawn |
Withdrawal date: 19841124 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: JOHNS, ROBERT HARVEY |