Magnetic cooling roll

Patent metadata

Field	Value
Publication number	US-11519052-B2
Application number	US-201917273466-A
Country	US
Kind code	B2
Filing date	Aug 28, 2019
Priority date	Sep 7, 2018
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

A cooling roll including an axle and a sleeve, the sleeve having a length and a diameter and being structured as follows: an inner cylinder, a plurality of magnets disposed along at least a portion of the inner cylinder length, each magnet being defined by a width, a height and a length, a cooling system surrounding at least a portion of the plurality of magnets, the cooling system and the plurality of magnets being separated by a gap defined by a height, the gap height being the smallest distance between a magnet and the cooling system above, the magnets having a width such that the following formula is satisfied:gap height×1.1≤magnet width≤gap height×8.6.

First claim

The invention claimed is:

1. A cooling roll comprising:
an axle; and
a sleeve having a length in an axial direction, and defining a radial direction and a circumferential direction and a diameter, the sleeve including: from an inside to an outside:
an inner cylinder having a periphery and an inner cylinder length,
a plurality of magnets on the periphery disposed along at least a portion of the inner cylinder length, each magnet being defined by a magnet width in the circumferential direction, a height in the radial direction and a length in the axial direction;
a cooling system surrounding at least a portion of said plurality of magnets;
the cooling system and the plurality of magnets being separated by a gap defined by a gap height in the radial direction, the gap height being a smallest distance between one of the plurality of magnets and the cooling system above,
the magnet width of each of the magnets satisfying the following formula:
gap height×1.1≤magnet width≤gap height×8.6.

2. The cooling roll as recited in claim 1 wherein the magnets are permanent magnets.

3. The cooling roll as recited in claim 1 wherein the cooling system is made of a metallic part including at least two cooling channels, a coolant flowable through the at least two cooling channels.

4. The cooling roll as recited in claim 3 wherein the cooling channels are disposed parallel to a cooling roll height.

5. The cooling roll as recited in claim 3 wherein the cooling system includes at least one injector for injecting a coolant in the cooling channel.

6. The cooling roll as recited in claim 5 wherein the at least one injector for injecting a coolant includes a plurality of injectors disposed on both sides of the cooling channels.

7. The cooling roll as recited in claim 1 wherein the magnet width satisfies the following formula:
gap height×1.4≤magnet width≤gap height×6.0.

8. The cooling roll as recited in claim 7 wherein said magnet width satisfies the following formula:
gap height×1.6≤magnet width≤gap height×5.0.

9. The cooling roll as recited in claim 1 wherein the plurality of magnets is disposed along an entirety of the inner cylinder length.

10. The cooling roll as recited in claim 1 wherein the cooling system surrounds the plurality of magnets.

11. A method for cooling a continuously moving metallic strip, in an installation with at least one cooling roll as recited in claim 1 , the method comprising:
attracting magnetically a portion of the metallic strip to the at least one cooling roll and putting the strip in contact with the at least one cooling roll.

12. The method as recited in claim 11 wherein the at least one cooling roll includes at least three cooling rolls and the strip is in contact with the at least three cooling rolls at a same time.

13. The method as recited in claim 11 wherein the strip in contact with the cooling roll has a speed between 0.3 m.s −1 and 20 m.s −1 .

14. The method as recited in claim 11 wherein the cooling system is made of a metallic part including at least two cooling channels, a coolant flowable through the at least two cooling channels, and the method further comprises flowing the coolant in the cooling channels in opposite directions in adjacent cooling channels.

15. The cooling roll according to claim 1 , wherein the cooling system has a hollow cylindrical shape.

16. The cooling roll according to claim 15 , wherein the hollow cylindrical shape has one or more cooling channels therein.

17. The cooling roll according to claim 16 , further comprising an injector and a return connected to each of the one or more cooling channels.

18. The cooling roll according to claim 16 , wherein the one or more cooling channels are disposed parallel to the axle.

19. The cooling roll according to claim 15 , wherein the hollow cylindrical shape has at least cooling channels therein, wherein each of the at least two cooling channels are disposed parallel to the axle and have a corresponding injector and return.

20. The cooling roll according to claim 6 , wherein the plurality of injectors are disposed on both sides of the cooling channels alternatively, such that each adjacent injector of the plurality of injectors are arranged on opposite sides of the cooling channels.

Assignees

• Arcelormittal

Inventors

• Hamide Makhlouf
• Anderhuber Marc
• Daubigny Alain
• Lutz Laurent

Classifications

• F27B9/145

  the charge moving along a serpentine path · CPC title

• C21D9/56

  Continuous furnaces for strip or wire · CPC title

• C21D9/0012 Primary

  Rolls; Roll arrangements · CPC title

• C21D9/5737 Primary

  Rolls; Drums; Roll arrangements · CPC title

• C21D9/563

  Rolls; Drums; Roll arrangements · CPC title