Rotating-hearth furnace for reduction of metallic oxides
US6447713B1 · kind B1 · utility
4Cited by
4References
9Claims
0Family size
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Inventor
Key dates
| Filing date | Jul 28, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Jul 28, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/134
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for improving the direct reduction of metal oxides in a continuous furnace with a rotating hearth. The method deposits two or several layers with increasing metal oxide contents in each layer towards a top loading surface and decreases carbon contents towards the top loading surface, which carbon will be preheated to a temperature of the order of 200° C. while the metal oxides will be preheated to a temperature of 800° C. The furnace is provided with equipment producing at the loading surface triangular grooves and in first and second zones of the furnace matching equipment with double action.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.