Patent · US Expired

Method of melting fine grained direct reduced iron in an electric arc furnace

US6524362B1 · kind B1 · utility

5Cited by

4References

4Claims

0Family size

Assignee

Metallgesellschaft AG · DE

Inventors

Heinz Eichberger · Bad Soden, DE
Siegfried Schimo · Friedrichsdorf, DE
Michael Stroeder · Frankfurt am Main, DE
William Wells · Charlotte, US

Key dates

Filing date	Jul 17, 2000
Grant date	Feb 25, 2003
Priority date	—
Expiry date	Jul 17, 2020

Classification

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

Abstract

The direct reduced iron (DRI) which for at least 80 wt-% has a grain size of not more than 3 mm is melted in an electric arc furnace. The furnace contains a bath of liquid iron. During the operation of the furnace a foamy slag layer is formed on the bath and the DRI falls by gravity through at least one movable lance into the foamy slag layer on the iron bath. Preferably, the distance of the aperture of the lance to the iron bath is kept practically constant.

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