Claims
- 1. A rotary hearth furnace comprising:a furnace body having a hearth and inner and outer side walls, each including through holes; a reduced iron discharging screw having a rotary shaft and a spiral blade dimensioned to pass through said through holes, said reduced iron discharging screw being mounted in said furnace body at a location to discharge reduced iron on the hearth from a discharge port of the furnace body, wherein axial ends of said rotary shaft extend through said through holes to the exterior of said furnace body; hatch members removably mounted to said axial ends of said rotary shaft, said hatch members externally closing said through holes; a first supporting device comprising means for removing said reduced iron discharging screw from said furnace body via one of said through holes at one of said side walls, and a movable bogie positionable to support the removed reduced iron discharging screw; and a second screw supporting device comprising a reciprocatable member having an end detachably connectable at the other of said side walls, and means for moving the reciprocatable member so as to draw the reduced iron discharging screw out of said furnace body.
Parent Case Info
This application is a continuation of U.S. application Ser. No. 09/982,781, filed on Oct. 22, 2001, and now U.S. Pat. No. 6,660,221.
US Referenced Citations (10)
Foreign Referenced Citations (3)
Number |
Date |
Country |
372 965 |
May 1932 |
GB |
3020482 |
Mar 2000 |
JP |
WO 0029628 |
May 2000 |
WO |
Non-Patent Literature Citations (1)
Entry |
Patent Abstracts of Japan, JP-2001-064170, Mar. 13, 2001. |
Continuations (1)
|
Number |
Date |
Country |
Parent |
09/982781 |
Oct 2001 |
US |
Child |
10/448207 |
|
US |