Rotary hearth furnace and screw thereof for discharging reduced iron
US6814924B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2003 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Jun 18, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27M2001/02
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A rotary hearth furnace is provided to simplify detachment and assembly operations of a reduced iron discharging screw.At both side walls of an insulating housing 2a constituting in part of a furnace body 2 of a rotary hearth furnace 1 are installed through-holes which a spiral blade 42 of a reduced iron discharging screw 4 can pass through, each of the through-holes is closed by an inner hatch member 8 and an outer hatch member 9 which are externally mounted in a removable fashion to a rotary shaft 41 of the reduced iron discharging screw 4, an inner screw supporting device 10 is installed in the outside at an inner periphery side of the hearth 3 as well as an outer screw supporting device 20 is installed in the outside at an outer periphery side of the hearth 3. The reduced iron discharging screw 4 is detached from the furnace body 2 via the through-holes and assembled to the furnace body 2 via the through-holes by using the inner screw supporting device 10 and the outer screw supporting device 20.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.