Feeding system for reduced iron material

• US 8,915,352 B2
• Filed: 08/31/2011
• Issued: 12/23/2014
• Est. Priority Date: 09/01/2010
• Status: Active Grant

• Current Assignee: Klaus Schmidt
• Original Assignee: Kobe Steel Limited
• Inventors: Tsuge, Osamu, Uemura, Tomoki
• Primary Examiner(s): NICHOLSON III, LESLIE AUGUST
• Application Number:
  US13/820,263
• Publication Number:
  US 20130153368A1
• Time in Patent Office: 1,210 Days
• Field of Search: 198/550.01, 198/560, 198/752.1, 198/550.4, 198/562, 198/758, 126/7, 126/10, 126/68, 126/73, 126/107, 126/501, 266/176, 266/199, 110/118, 110/165.R, 110/219, 110/220, 110/255, 110/258, 110/267, 110/293
• US Class Current: 198/752.1
• CPC Class Codes: B65G 27/00 Jigging conveyors
• CPC Class Codes: C21B 13/0053 On a massing grate
• CPC Class Codes: C21B 13/10 in hearth-type furnaces
• CPC Class Codes: F27B 9/16 the charge moving in a circular or arcuate path
• CPC Class Codes: F27B 9/38 Arrangements of devices for charging
• CPC Class Codes: F27D 2003/0004 involving devices for measuring the article, the stack of articles or the height of the furnace passage or for adjusting the height of the passage to the charge or for putting the articles in the same position

Abstract

Not only the cracking of granular reduced iron materials is reduced, but also reduced iron materials are fed uniformly onto a furnace floor regardless of a width of the furnace floor. A feeding system for reduced iron material includes a plurality of material feeding equipments 4 provided in a furnace width direction of a mobile furnace floor type reduction melting furnace, wherein each of the material feeding equipments 4 is constructed by a hopper 10 configured to receive reduced iron materials and discharge the materials from a discharge port 10a, a trough 14 configured to connect the discharge port 10a and a material charging portion of the mobile furnace floor type reduction melting furnace configured to receive the reduced iron materials discharged from the discharge port 10a, an exit portion provided on an exit side of the trough 14, and a vibration applying unit configured to cause the trough to vibrate along a furnace floor moving direction.

Claims

1. A feeding system for reduced iron material, comprising:

a plurality of material feeding equipments provided in a furnace width direction of a mobile furnace floor type reduction melting furnace, wherein

each of the material feeding equipments includes;

a hopper configured to receive reduced iron materials and discharge the materials from a discharge port;

a trough configured to connect the discharge port and a material charging portion of the mobile furnace floor type reduction melting furnace and configured to receive the reduced iron materials discharged from the discharge port;

an exit portion provided on an exit side of the trough; and

a vibration applying unit configured to cause the trough to vibrate along a furnace floor moving direction, wherein

the material feeding equipments are arranged in a zigzag fashion in the furnace width direction.

2. The feeding system according to claim 1, wherein

a connection portion configured to connect an exit portion of the trough and the material charging portion of the mobile furnace floor type reduction melting furnace is formed into an oval shape when viewed from a top side.

3. The feeding system according to claim 2, wherein

a height from a furnace floor of the mobile furnace floor type reduction melting furnace to the exit portion of the trough is set to 1,200 mm or less.

4. The feeding system according to claim 2, wherein

the material charging portion has a water cooling wall.

5. The feeding system according to claim 2, wherein

a load distributing unit is provided to an upper portion of the hopper.

6. The feeding system according to claim 2,

wherein a reception port configured to receive the reduced iron material is provided on an inlet side of the trough, and the discharge port of the hopper and the reception port are connected via an expansion joint that has airtightness.

7. The feeding system according to claim 2, further comprising a metal band wound around the connection portion.

8. The feeding system according to claim 1, wherein

a height from a furnace floor of the mobile furnace floor type reduction melting furnace to the exit portion of the trough is set to 1,200 mm or less.

9. The feeding system according to claim 1, wherein

the material charging portion has a water cooling wall.

10. The feeding system according to claim 1, wherein

a load distributing unit is provided to an upper portion of the hopper.

11. The feeding system according to claim 1

wherein a reception port configured to receive the reduced iron material is provided on an inlet side of the trough, and the discharge port of the hopper and the reception port are connected via an expansion joint that has airtightness.

12. The feeding system according to claim 11, wherein

the expansion joint comprises a sealing material that has flexibility.

13. The feeding system according to claim 1, further comprising

a distributing and feeding equipment configured to distribute and feed the reduced iron materials to respective supply hoppers every predetermined amount.

14. The feeding system according to claim 13, wherein

a screen unit is provided on an upstream side of the distributing and feeding equipment in a flow along which the reduced iron materials are fed.

15. A feeding system for reduced iron material, comprising:

a plurality of material feeding equipments provided in a furnace width direction of a mobile furnace floor type reduction melting furnace, wherein

each of the material feeding equipments includes;

a hopper configured to receive reduced iron materials and discharge the materials from a discharge port;

a trough configured to connect the discharge port and a material charging portion of the mobile furnace floor type reduction melting furnace and configured to receive the reduced iron materials discharged from the discharge port;

an exit portion provided on an exit side of the trough; and

a vibration applying unit configured to cause the trough to vibrate along a furnace floor moving direction, wherein

a rectangle chute is provided as the exit portion, and reinforcing ribs are provided in the chute.

16. The feeding system according to claim 15, wherein

a lower end of the chute is provided to overlap with the material charging portion.

17. The feeding system according to claim 15, wherein

a height from a furnace floor of the mobile furnace floor type reduction melting furnace to the exit portion of the trough is set to 1,200 mm or less.

18. The feeding system according to claim 15, wherein

the material charging portion has a water cooling wall.

19. The feeding system according to claim 15, wherein

a load distributing unit is provided to an upper portion of the hopper.

20. The feeding system according to claim 15,

wherein a reception port configured to receive the reduced iron material is provided on an inlet side of the trough, and the discharge port of the hopper and the reception port are connected via an expansion joint that has airtightness.