Patent · US Expired

Method and device for direct reduction of ore fines

US6136065A · kind A · utility

1Cited by

4References

12Claims

0Family size

Assignee

Ferrostaal Aktiengesellschaft · DE

Inventors

Peter Heinrich · Oberhausen, DE
Klaus Knop · Geldern, DE

Key dates

Filing date	Oct 5, 1998
Grant date	Oct 24, 2000
Priority date	—
Expiry date	Oct 5, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/134
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A method and device are provided for direct reduction of ore fines in a wide range of particle size, the reducing agent being hydrogen placed in a fluidized bed gutter with a plurality of sequentially arranged chambers. The fluidization rate in the supply base is set so that a defined class of particle size remains in the chamber concerned where it will be submitted to a reduction process and that the finest particle size fraction is discharged from the chamber, then precipitated in a hot gas cyclone to solid material (or fines) and gas. The ore fines precipitated in the cyclone then reaches the following chamber. The gas from all the hot gas cyclones is fed by a collector to the pre-heater. After reduction in the chambers, the ore fines are conveyed in pressure vessels for submission to further processes.

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