Method for producing reduced iron agglomerates
US6254665A · kind A · utility
37Cited by
5References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Oct 28, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF27D3/0033
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A moving hearth is formed by providing a layer of hearth material primarily composed of iron oxide on a base refractory in a reducing furnace and then sintering the hearth material so that the sintered moving hearth is not melted at an operational temperature in a reducing step. The moving hearth is more easily constructed compared to providing a shaped or amorphous refractory on the base refractory, has high durability, and can maintain surface flatness during operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.