EP0891236A1 - Vertikal-stranggiesskokille mit aufsatz - Google Patents
Vertikal-stranggiesskokille mit aufsatzInfo
- Publication number
- EP0891236A1 EP0891236A1 EP97916508A EP97916508A EP0891236A1 EP 0891236 A1 EP0891236 A1 EP 0891236A1 EP 97916508 A EP97916508 A EP 97916508A EP 97916508 A EP97916508 A EP 97916508A EP 0891236 A1 EP0891236 A1 EP 0891236A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mold
- slot
- gas
- ingot mold
- slit
- 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
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/0401—Moulds provided with a feed head
-
- 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
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting
Definitions
- the present invention relates to the Continuous Casting in Vertical Load of metals, in particular steel. It is known that Continuous Vertical Load Casting is essentially distinguished from Classic Vertical Continuous Casting by the fact that the cooled ingot mold body (generally made of copper or copper alloy) ensuring the peripheral solidification of the cast metal, is overcome by a extension in refractory material containing a reserve of molten metal maintained in the liquid state (FR-A-2 000 365). In this way, the place in the copper body where the solidification of the cast metal begins is decoupled from that where the free surface of the molten metal in the riser is located, whereas they are almost confused in Vertical Continuous Casting Classic.
- the aim is thus to be able to flow good quality products with high extraction speeds, because the solidification zone is no longer disturbed by the usual turbulence in the flow of metal arriving in the mold, which is then confined in the buffer volume. within the enhancement. It is also known to carry out a sweeping with inert gas, of argon for example, by injection of waste gas at the interface between the body of the mold and the extension. Such an arrangement is, for example, described in Patent Application EP-A-620,062 in the name of the Applicant. This sweeping is intended to break the slightly homogeneous parasitic solidification veil which tends to form by contact of the molten metal with the wall of the refractory riser.
- FIG. 1 An injection technology shown in Figure 1 attached. Essentially, it is an annular slot (8), continuous, or segmented, opening at the inner periphery of the mold.
- the scanning slit (8) is traversed by a stream of argon lost from an annular distribution chamber (1 3) formed in the vicinity of the slit and making it possible to maintain an identical gas pressure at all points of the perimeter in said room. Tubes (12) with low pressure drop connect this chamber (1 5) to the gas source constituted by a box 10 attached to the ingot mold.
- the main pressure drop of the flow of the injected gas is located at the level of the scanning slot (8) and is closely linked to the geometry thereof, and more particularly to the thickness of slot. If the surfaces facing each other (the upper face of the cooled metal body (1) of the ingot mold and the lower face of the refractory extension (2) are not strictly parallel, a local variation of the the slit thickness then leads to a heterogeneous argon injection flow rate around the periphery of the mold and therefore to possible surface defects on the cast product.
- the object of the present invention is to ensure a gas injection rate with regular and constant sweeping over the entire perimeter of the mold throughout the casting operation.
- the subject of the invention is a mold for continuous casting in vertical load of metals, in particular steel, constituted by a cooled metallic body defining a passage for the cast product and surmounted by an extension made of refractory material, and at the interface of which a sweeping slot is formed by which a stream of lost inert gas is injected along the inside periphery of the ingot mold, from a distribution chamber formed in the vicinity of the slot, and itself supplied with gas by pipes which connect it to a source of gas under pressure, an ingot mold characterized in that the scanning slot is segmented around the periphery of the ingot mold by means of separation means which also segment said distribution chamber into contiguous compartments along the periphery of the mold, and in that calibrated intake pipes are provided at each compartment thus formed p or connect it to the source of pressurized gas.
- the invention therefore essentially consists in serving as a stream of sweeping gas a non-continuous injection slot around the periphery of the ingot mold by a chamber which runs along it, itself segmented into independent compartments along this periphery.
- a plurality of autonomous injection circuits mounted in parallel and each comprising " : a calibrated intake manifold opening into a compartment extended by a scanning slot serving in gas only a portion of the periphery of the ingot mold, the juxtaposition of these slots according to their length ensuring gas distribution along the entire internal perimeter of the mold.
- the length of the slot coincides with that of the associated compartment.
- any disturbance of the gas flow in any circuit due to an external cause for example the accidental narrowing of a scanning slot, has no influence on the flow rate in the neighboring circuits.
- the injection perimeter around the periphery of the ingot mold thus becomes not very sensitive to local failures, unlike the prior art where a punctual anomaly of the scanning slot can lead to degrading the gas flow characteristics over a part of the periphery significantly larger than that directly affected by the incident.
- FIG. 1 shows, in vertical section, the upper part of a mold for Continuous Casting under Vertical Load provided with a gas injection circuit according to the Prior Art already mentioned;
- FIG. 2 shows, also in vertical section along the plane BB 'of Figure 3, an enlarged view of the gas injection circuit which is provided with the upper part of a mold for Continuous Casting in Vertical Charge according to invention
- FIG. 3 shows the injection circuit seen along the cutting plane A-A 'of Figure 1.
- the same elements are designated by identical references.
- the molten metal is introduced into an ingot mold, with a flow rate adjusted to that with which the cast metal comes out of it, using a refractory nozzle 5 opening into the bottom of a casting distributor, not shown, placed at the above.
- the nozzle is provided at its lower part with lateral openings 6 through which the molten metal flows into the ingot mold.
- the control of the flow rate of "metal” keeps the free surface 7 of the molten metal at a controlled height level about ten centimeters above the openings 6 (taking into account the fluctuations due to the vertical oscillation of the mold). As can be understood, this upper part of the cast metal (15-
- a current of inert sweeping gas is however advised on the inside periphery of the ingot mold just above the upper edge of the copper element where solidification is initiated.
- This sweeping current allows a solid and regular start of the solidification process by breaking the parasitic solidification veil that can form 37792 5 PC17FR97 / 00546
- this scanning current is produced by a supply circuit comprising, from an argon pressure source 10, calibrated pipes 12 connecting this source to an internal distribution chamber 13 traversing the periphery of the ingot mold and from which a slot 8 opens out into the mold between the extension 2 and the body at the center 1.
- this slot is made between the two aforementioned elements by means of a calibrated spacer spacer 19 inserted at the periphery of the copper element 1.
- the solution proposed to the problems posed by the above-mentioned scanning circuit for the regularity of distribution of the gas outlet flow rate according to the inner periphery of the mold consists of:
- a first chamber 20 serves to contain a volume of argon under a given pressure.
- the calibrated pipes 12 connect this chamber to the second chamber 13 whose role, as we have seen, is to distribute the gas in the scanning slot 8 which opens to the interior surface 17 of the ingot mold 1 around the periphery thereof. this.
- the scanning slot 8 is divided into juxtaposed sectors, separated from each other by partitions 21 which in the same way share the second distribution chamber 13 in compartments 1 3'-13 "... juxtaposed along the periphery of the ingot mold and in Coincidence with the partition of the slot.
- each partition 21 comprises an advanced part 21 a of low height, corresponding to the thickness of the slot 8 in which it takes position, and a mother part 21 b whose surface corresponds to the section of the chamber 13 to be partitioned.
- segmentation in accordance with the invention makes it possible to divide in a ratio of five, or even eight, the influence of the local variations in thickness of the slot 8 on the overall flow rate of gas injected in the mold.
- each elementary circuit thus formed is supplied in an identical and constant manner by the general pressure chamber 20 and the assembly becomes not very sensitive to local variations slot thickness, or more generally, any localized disturbance of the injection circuit for reasons external to the circuit.
- partitions 21, which divide both the slot 8 and the chamber 13 it is understood that any other means than that described, fulfilling this double function may be suitable, like plates (equivalent 21 b) for partialization of the chamber 13, associated with ribs (equiv. 21 a) formed on the upper face of the copper element and cooperating with the refractory part above to define the slots, knowing that the order of magnitude of the thickness e of scanning slit can be about 0.1 -0.3 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Confectionery (AREA)
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9604306 | 1996-04-05 | ||
| FR9604306A FR2747063B1 (fr) | 1996-04-05 | 1996-04-05 | Lingotiere de coulee continue en charge verticale des metaux |
| PCT/FR1997/000546 WO1997037792A1 (fr) | 1996-04-05 | 1997-03-27 | Lingotiere de coulee continue en charge verticale des metaux |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0891236A1 true EP0891236A1 (de) | 1999-01-20 |
| EP0891236B1 EP0891236B1 (de) | 2000-03-15 |
Family
ID=9490960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97916508A Expired - Lifetime EP0891236B1 (de) | 1996-04-05 | 1997-03-27 | Vertikal-stranggiesskokille mit aufsatz |
Country Status (12)
| Country | Link |
|---|---|
| US (1) | US6109335A (de) |
| EP (1) | EP0891236B1 (de) |
| JP (1) | JP3720376B2 (de) |
| AT (1) | ATE190530T1 (de) |
| AU (1) | AU2513397A (de) |
| CA (1) | CA2251020C (de) |
| DE (1) | DE69701454T2 (de) |
| ES (1) | ES2145594T3 (de) |
| FR (1) | FR2747063B1 (de) |
| GR (1) | GR3033481T3 (de) |
| PT (1) | PT891236E (de) |
| WO (1) | WO1997037792A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2787359B1 (fr) | 1998-12-18 | 2001-10-12 | Aster | Lingotiere pluriangulaire de coulee continue en charge d'un produit metallurgique |
| DE102004033917B4 (de) * | 2004-07-14 | 2008-12-24 | Schott Ag | Vorrichtung und Verfahren zum Schachtguss von stabförmigen Artikeln |
| US8393393B2 (en) | 2010-12-17 | 2013-03-12 | Halliburton Energy Services, Inc. | Coupler compliance tuning for mitigating shock produced by well perforating |
| US20120241169A1 (en) | 2011-03-22 | 2012-09-27 | Halliburton Energy Services, Inc. | Well tool assemblies with quick connectors and shock mitigating capabilities |
| US9091152B2 (en) | 2011-08-31 | 2015-07-28 | Halliburton Energy Services, Inc. | Perforating gun with internal shock mitigation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2000365A7 (de) * | 1968-01-18 | 1969-09-05 | United States Steel Corp | |
| CA1082875A (en) * | 1976-07-29 | 1980-08-05 | Ryota Mitamura | Process and apparatus for direct chill casting of metals |
| DE3533517A1 (de) * | 1985-09-20 | 1987-04-02 | Vaw Ver Aluminium Werke Ag | Verfahren und vorrichtung zum stranggiessen |
| DE4212531C1 (de) * | 1992-04-15 | 1993-10-21 | Vaw Ver Aluminium Werke Ag | Gas- und Trennmittelzuführungs- und Verteilungssystem für eine Vorrichtung zum Stranggießen |
| FR2703609B3 (fr) * | 1993-03-30 | 1995-02-10 | Lorraine Laminage | Procédé de coulée continue en charge des métaux et lingotière pour sa mise en Óoeuvre. |
-
1996
- 1996-04-05 FR FR9604306A patent/FR2747063B1/fr not_active Expired - Fee Related
-
1997
- 1997-03-27 PT PT97916508T patent/PT891236E/pt unknown
- 1997-03-27 EP EP97916508A patent/EP0891236B1/de not_active Expired - Lifetime
- 1997-03-27 JP JP53588497A patent/JP3720376B2/ja not_active Expired - Fee Related
- 1997-03-27 AT AT97916508T patent/ATE190530T1/de active
- 1997-03-27 DE DE69701454T patent/DE69701454T2/de not_active Expired - Lifetime
- 1997-03-27 CA CA002251020A patent/CA2251020C/fr not_active Expired - Fee Related
- 1997-03-27 AU AU25133/97A patent/AU2513397A/en not_active Abandoned
- 1997-03-27 WO PCT/FR1997/000546 patent/WO1997037792A1/fr not_active Ceased
- 1997-03-27 ES ES97916508T patent/ES2145594T3/es not_active Expired - Lifetime
- 1997-03-27 US US09/147,028 patent/US6109335A/en not_active Expired - Lifetime
-
2000
- 2000-05-23 GR GR20000401178T patent/GR3033481T3/el unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9737792A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0891236B1 (de) | 2000-03-15 |
| FR2747063A1 (fr) | 1997-10-10 |
| ATE190530T1 (de) | 2000-04-15 |
| ES2145594T3 (es) | 2000-07-01 |
| DE69701454T2 (de) | 2000-10-12 |
| WO1997037792A1 (fr) | 1997-10-16 |
| DE69701454D1 (de) | 2000-04-20 |
| CA2251020C (fr) | 2005-01-04 |
| AU2513397A (en) | 1997-10-29 |
| CA2251020A1 (fr) | 1997-10-16 |
| FR2747063B1 (fr) | 1998-05-22 |
| GR3033481T3 (en) | 2000-09-29 |
| PT891236E (pt) | 2000-07-31 |
| JP3720376B2 (ja) | 2005-11-24 |
| US6109335A (en) | 2000-08-29 |
| JP2000508241A (ja) | 2000-07-04 |
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