Roll for handling a load in a furnace usable in a continuous casting and rolling process for thin carbon steel slabs

Patent metadata

Field	Value
Publication number	US-9796017-B2
Application number	US-201515310723-A
Country	US
Kind code	B2
Filing date	May 27, 2015
Priority date	May 27, 2014
Publication date	Oct 24, 2017
Grant date	Oct 24, 2017

Abstract

The present invention relates to a water-cooled handling roll ( 100 ) for handling a load ( 50 ), in particular a thin slab, in a furnace for temperature heating, maintaining and for buffering, arranged between casting and roughing, in a continuous casting and rolling process for thin carbon steel slabs. The roll ( 100 ) comprises a first internally hollow shaft ( 110 ), which is coated by an insulating and/or refractory material and a plurality of wheels ( 25 ) connected in stably fixed manner to an outermost surface ( 111 ) of the first shaft ( 110 ) to handle and support the load ( 50 ). According to the invention, the roll ( 100 ) also comprises a second shaft ( 120 ) arranged within an inner cavity of the first shaft ( 110 ) in position coaxial to the first shaft ( 110 ) and so as to define a gap ( 30 ) between the first shaft ( 110 ) and said second shaft ( 120 ). The roll ( 100 ) further comprises cooling water circulation means housed at least in part within said second shaft ( 120 ).

First claim

The invention claimed is:

1. A water-cooled handling roll for handling a load, in particular a thin slab, in a furnace for heating, temperature maintaining and for buffering of said load in a continuous casting and rolling process, wherein said water-cooled handling roll comprises:
a first shaft internally hollow, which longitudinally runs around a first longitudinal axis, said first shaft comprising an outermost surface and an innermost surface, wherein said outermost surface of said first shaft is coated by an insulating and/or refractory material, and wherein said innermost surface of said first shaft defines an inner cavity of said first shaft;
a plurality of supporting wheels for supporting said load, said supporting wheels being stably fixed to said outermost surface of said first shaft;
a second shaft arranged within said inner cavity of said first shaft in a position coaxial to said first shaft, an outermost surface of said second shaft having, over at least a first longitudinal length, a smaller diameter than the diameter of said inner cavity of said first shaft so as to define a gap between said first shaft and said second shaft,
centering rings arranged inside said gap and stably integral with said second shaft, said centering rings having a diameter smaller than said diameter of said inner cavity of said first shaft;
cooling water circulation means housed at least in part within said second shaft.

2. A water-cooled handling roll according to claim 1 , wherein said centering rings are made in one piece with said second shaft.

3. A water-cooled handling roll according to claim 1 , wherein said second shaft is made of construction steel.

4. A water-cooled handling roll according to claim 1 , wherein a longitudinal position of said centering rings is offset with respect to a longitudinal position of said supporting wheels.

5. A water-cooled handling roll according to claim 1 , wherein said second shaft is internally hollow comprising a longitudinal cavity within which said cooling water circulation means are arranged.

6. A water-cooled handling roll according to claim 1 , wherein said first shaft is made of a steel alloy capable of withstanding temperatures higher than 1000 degrees.

7. A water-cooled handling roll according to claim 1 , wherein said centering rings are made of a material having a lower thermal conductivity than that of said first shaft and/or of said second shaft.

8. A furnace for heating, temperature maintaining and for buffering, arrangeable between a continuous cast and a roughing roll in a continuous casting and rolling process for casting carbon steel thin slabs, characterized in that it comprises at least one water-cooled handling roll according to claim 1 .

Assignees

• Danieli Off Mecc
• Danieli Centro Comb S P A

Inventors

• Leoncini Claudio
• Mazza Matteo
• Pedemonte Mirco

Classifications

• C03B35/184

  Cooling · CPC title

• C03B35/186

  End caps, end fixtures or roller end shape designs · CPC title

• F27B9/2407 Primary

  the conveyor being constituted by rollers (roller hearth furnace) · CPC title

• F27D3/026

  transport or conveyor rolls for furnaces; roller rails · CPC title

• C03B35/181

  Materials, coatings, loose coverings or sleeves thereof · CPC title