Patent · US Expired

Direct reduction process and apparatus

US7608128B2 · kind B2 · utility

0Cited by

3References

72Claims

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	Oct 27, 2009
Priority date	—
Expiry date	Nov 29, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/134
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A direct reduction process for a metalliferous material includes supplying a solid carbonaceous material and an oxygen-containing gas into a fluidized bed in a first vessel and generating heat by reactions between the oxygen-containing gas and the solid carbonaceous material and any other oxidizable solids and gases in the fluidized bed and discharging a hot off-gas stream containing entrained solids. The process also includes supplying the metalliferous material to a fluidized bed in a second vessel and supplying the hot off-gas stream containing entrained solids from the first vessel to the fluidized bed in the second vessel and partially reducing the metalliferous feed material in the solid state in the fluidized bed and discharging a product stream of partially reduced metalliferous material and an off-gas stream containing entrained solids.

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