Claims
- 1. Apparatus for casting metal strip comprising:
- a pair of generally horizontal casting rolls forming a nip between them;
- metal delivery means for delivering molten metal into the nip between the casting rolls to form a casting pool of molten metal supported on the rolls;
- means for chilling the casting rolls;
- means for rotating the casting rolls in mutually opposite directions to produce a cast strip delivered downwardly from the nip;
- strip guide means guiding the strip delivered downwardly from the nip through a travelling path which takes it away from the nip towards a coiler;
- a hot rolling mill, disposed along said travelling path to receive the cast strip and to roll that strip in line with the strip caster; and an enclosure to confirm the strip throughout said travelling path which enclosure comprises an upstream chamber adapted to enclose the strip from its formation at the nip and one or more other chambers, each chamber having means for providing a controlled atmosphere to control the formation of scale on the strip during operation of the apparatus wherein at least one of the one or more other chambers is provided with quenching means comprising a quenching medium which is liquid at room temperature for quenching the strip passing therethrough, and wherein the rolling mill is disposed between chambers.
- 2. Apparatus as claimed in claim 1 further comprising pinch rolls for pinching a strip continuously cast by the pair of casting rolls, a rolling mill with a pair of work rolls for rolling the strip delivered from said pinch rolls, a coiler being adapted to coil the strip delivered from the rolling mill, the enclosure comprising the upstream chamber for enclosing a travelling path of the strip from the casting rolls to the pinch rolls, said upstream chamber having seal members for airtightly contacting outer peripheries of the casting and pinch rolls, and two other chambers being an intermediate chamber for enclosing a travelling path of the strip from the pinch rolls to the work rolls, said intermediate chamber having seal members for airtightly contacting outer peripheries of the pinch and work rolls and a downstream chamber for enclosing a travelling path of the strip from the work rolls to a position before the coiler, said downstream chamber having seal members for airtightly contracting outer peripheries of the work rolls and seal means on an end of the downstream chamber closer to the coiler adapted to pass the strip therethrough, a gas supply source for supplying non-oxidising and reducing gases to the upstream, intermediate and downstream chambers and quenching means for quenching the strip in the downstream chamber and whereby the strip is coiled.
- 3. Apparatus as claimed in claim 1, wherein the quenching medium is one of methyl alcohol, water and a mixture of methyl alcohol and water.
- 4. Apparatus as claimed in claim 1, further comprising heating means disposed ahead of the rolling mill to adjust the temperature of the strip before it enters the rolling mill.
- 5. Apparatus as claimed in claim 1 further comprising means to supply non-oxidising gas to one or more of the chambers.
- 6. Apparatus as claimed in claim 1 further comprising means to supply reducing gas to one or more of the chambers.
- 7. Apparatus as claimed in claim 1 further comprising means to supply quenching medium to one or more of the other chambers.
- 8. Apparatus as claimed in claim 1 further comprising means for collecting and means for processing waste quenching medium for recycling as quenching medium.
- 9. Apparatus according to claim 1, wherein nozzle groups are arranged in each of the chambers to face the strip, said nozzle groups being, connected to a gas supply source.
- 10. Apparatus according to claim 2, wherein heaters are arranged between the pinch rolls and the work rolls to face the strip.
- 11. Apparatus according to claim 1, wherein the quenching means comprises nozzle groups in the downstream chamber adapted to face the strip and quenching medium supply source for supplying quenching medium thereto.
- 12. Apparatus according to claim 9, wherein the nozzle groups in the downstream chamber are additionally connected to quenching medium supply source for supplying quenching medium.
- 13. Apparatus according to claim 1, wherein non-oxidising and reducing gases are supplied into the chambers.
- 14. Apparatus according to claim 2, wherein the temperature of the strip is adjusted to a temperature suitable for rolling by heaters arranged between the pinch rolls and the rolling mill.
- 15. Apparatus according to claim 2, wherein the seal means is in the form of a shutter.
Priority Claims (1)
Number |
Date |
Country |
Kind |
PN 7330 |
Dec 1995 |
AUX |
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Parent Case Info
This is a division of application Ser. No. 08/773,633 filed Dec. 23, 1996, now U.S. Pat. No. 5,720,335.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
5584337 |
Nakashima et al. |
Dec 1996 |
|
Foreign Referenced Citations (3)
Number |
Date |
Country |
57-181749 |
Nov 1982 |
JPX |
62-77151 |
Apr 1987 |
JPX |
3-42101 |
Feb 1991 |
JPX |
Divisions (1)
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Number |
Date |
Country |
Parent |
773633 |
Dec 1996 |
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