Method of reducing finely grained material containing iron oxides in a fluid bed
US4084958A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 29, 1977 |
| Grant date | Apr 18, 1978 |
| Priority date | — |
| Expiry date | Jun 29, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P10/134
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Fine-grained iron oxide reduction in a fluidized bed; a reducing agent in the form of fine-grained solid carbonaceous material containing volatile constituents is introduced into at least one zone of the fluidized bed; in said zone the volatile constituents are driven off, and a tarry material is temporarily formed on the surface of the particles of the carbonaceous material; the fine-grained iron oxide to be reduced is introduced into said zone; iron oxide particles adhere to the tarry carbonaceous particles; in this manner micro-aggregates which are especially desired are formed; but the formation of bigger aggregates is prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.