Rotary charging device for shaft furnace

Patent metadata

Field	Value
Publication number	US-9389019-B2
Application number	US-201314415886-A
Country	US
Kind code	B2
Filing date	Jul 15, 2013
Priority date	Jul 18, 2012
Publication date	Jul 12, 2016
Grant date	Jul 12, 2016

Abstract

A rotary charging device for a shaft furnace comprising: a stationary housing ( 16 ) and a suspension rotor ( 22 ) that is supported so that it can rotate about a substantially vertical axis (A), a charge distributor ( 28 ) being pivotally suspended to the suspension rotor ( 22 ). Rotary drive means are provided for rotating the suspension rotor about its axis (A) and tilting drive means for pivoting the charge distributor ( 28 ) about a substantially horizontal pivoting axis (B), independently from said rotary drive means. The tilting drive means are mounted onto the suspension rotor ( 22 ) and rotate therewith; they comprise: an electric tilting motor (M B ) is installed inside the main casing ( 36 ) and having a substantially horizontal output shaft ( 52 ); a tilting input gear ( 54 ) driven by the tilting motor output shaft; and a tilting output gear ( 56 ) rotationally integral with a suspension arm ( 34 ) of said chute distributor ( 28 ), said tilting input gear meshing with said tilting output gear.

First claim

The invention claimed is:

1. A rotary charging device for a shaft furnace comprising:
a stationary housing for mounting on the throat of the shaft furnace; a suspension rotor in said stationary housing that is supported so that it can rotate about a substantially vertical axis, said suspension rotor and stationary housing cooperating to form the main casing of said rotary charging device; a charge distributor pivotally suspended to said suspension rotor; rotary drive means for rotating the suspension rotor about its axis; tilting drive means for pivoting said charge distributor about a substantially horizontal pivoting axis, independently from said rotary drive means, wherein:
said tilting drive means are mounted onto said suspension rotor and rotate therewith,
a tilting motor is installed inside said main casing and has a substantially horizontal output shaft, said tilting motor being arranged so as to rotate with said suspension rotor;
a tilting input gear is driven by said tilting motor output shaft; and a tilting output gear is rotationally integral with a suspension arm of said chute distributor, said tilting input gear meshing with said tilting output gear.

2. The rotary charging device according to claim 1 , wherein said suspension rotor comprises a cylindrical body and a bottom flange.

3. The rotary charging device according to claim 2 , wherein said tilting drive means are supported by said bottom flange.

4. The rotary charging device claim 1 , wherein:
a rotary motor is mounted laterally to said stationary housing or inside said stationary housing with its output shaft substantially horizontal; and
said rotary drive means comprise a main transmission with an input gear driven by said output shaft and meshing with a toothed ring coaxial and rotationally integral with said suspension rotor.

5. The rotary charging device according to claim 4 , wherein said toothed ring is fixed to a lower side of said bottom flange; and said input gear driven by said rotary motor is arranged below said bottom flange in meshing engagement with said toothed ring.

6. The rotary charging device according to claim 5 , wherein said suspension rotor is rotationally supported by a rolling bearing mounted to a top ring of said shaft furnace, one race of said rolling bearing being fixed to the lower side of the suspension rotor's bottom flange.

7. The rotary charging device according to claim 1 , wherein said suspension rotor is rotationally supported by a rolling bearing, a first race of which is attached to a wall portion of said suspension rotor and a second race of which is attached to a fixed structure.

8. The rotary charging device according to claim 7 , wherein the first race is attached to an upper horizontal wall portion of said suspension rotor and the second race is attached, directly or indirectly, to the upper flange of said stationary housing; or said first race is attached to the bottom flange of said suspension rotor and the second race is attached to one of the lower flange of said stationary housing and the top ring of the shaft furnace.

9. The rotary charging device according to claim 1 , wherein said tilting motor output shaft is substantially parallel to said pivoting axis.

10. The rotary charging device according to claim 1 , wherein said suspension rotor comprises a bottom with a recessed portion in which an output gear driven by said tilting motor and rotationally integral with a suspension arm of said distribution chute is arranged.

11. The rotary charging device according to claim 1 , wherein said tilting motor is located in a sub-chamber of said main casing, with its output shaft passing through a partition wall of said main casing.

12. The rotary charging device according to claim 1 , wherein a rotary motor is mounted with its output shaft substantially vertical and a main transmission comprises an input gear driven by said output shaft and meshing with a toothed ring coaxial with and rotationally integral with said suspension rotor.

13. The rotary charging device according to claim 1 , wherein the tilting drive means comprise a worm gear set coupling said the tilting motor output shaft to said input gear, said tilting motor being supported with its output shaft by an annular rolling bearing so as to be carried along by the rotating suspension rotor.

14. The rotary charging device according to claim 1 , comprising wherein inductive power supply means are provided for supplying electric power to said tilting motor.

15. The rotary charging device according to claim 1 , comprising wherein an additional cooling system is provided, said additional cooling system including a rotary circuit portion fixed on the suspension rotor and a stationary circuit portion fixed to the stationary housing.

16. A shaft furnace, in particular a blast furnace, comprising a rotary charging device according to claim 1 .

17. The rotary charging device according to claim 7 , wherein said rolling bearing comprises a slewing ring.

18. The rotary charging device according to claim 1 , wherein said tilting motor is an electric motor.

Assignees

• Wurth Paul Sa

Inventors

• Thillen Guy
• Thix Christian Benoit
• Hausemer Lionel

Classifications

• C21B7/20 Primary

  with appliances for distributing the burden · CPC title

• F27B1/20 Primary

  Arrangements of devices for charging · CPC title

• F27D3/00

  Charging; Discharging; Manipulation of charge · CPC title

• F27D3/0025

  Charging or loading melting furnaces with material in the solid state · CPC title

• C21B7/00

  Blast furnaces · CPC title