Patent · US Active

Direct reduction process

US7780759B2 · kind B2 · utility

0Cited by

7References

33Claims

0Family size

Assignee

Outotec Oyj · FI

Inventors

Andreas Orth · Friedrichsdorf, DE
Heinz Eichberger · Bad Soden, DE
Donald Keith Philp · Fremantle, AU
Rod Dry · Perth, AU

Key dates

Filing date	May 20, 2005
Grant date	Aug 24, 2010
Priority date	—
Expiry date	Aug 18, 2026

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/20
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A direct reduction process for a solid metalliferous material having a particle size distribution that at least in part contains micron sized particles includes supplying the metalliferous material, a solid carbonaceous material, an oxygen-containing gas, and a fluidizing gas into a fluidized bed in a vessel and maintaining the fluidized bed in the vessel, at least partially reducing metalliferous material in the vessel, and discharging a product stream that comprises the partially reduced metalliferous material from the vessel. The process includes (a) establishing and maintaining a carbon-rich zone within the fluidized bed; (b) passing metalliferous material, including metallized material (which term includes partially metallized material), through the carbon-rich zone; and (c) injecting the oxygen-containing gas into the carbon-rich zone and oxidizing metallized material, solid carbonaceous material and other oxidizable solids and gases and causing controlled agglomeration of particles.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.