Direct reduced iron (DRI) heat treatment, products formed therefrom, and use thereof
US11427877B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2018 |
| Grant date | Aug 30, 2022 |
| Priority date | — |
| Expiry date | Oct 18, 2039 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC21B13/143
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A DRI product and method of forming the DRI product. DRI is formed from a reducing process, and thereafter the DRI is subjected to another heat treatment that produces a DRI product. The DRI product formed has a metallic shell around at least a portion of a DRI core. The heat treatment may be delivered through the use of a plasma torch, a gas burner, an oven, or any other like heat source. The heat treatment may heat the DRI for a fraction of a second and quickly cool the DRI in order to melt the surface and form the metallic shell without vaporizing a significant portion of the DRI and without losing a significant amount of the latent energy in the DRI.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.