Patent · US Active

Process for producing stainless steel using direct reduction furnaces for ferrochrome and ferronickel on the primary side of a converter

US8133296B2 · kind B2 · utility

0Cited by

12References

7Claims

0Family size

Assignee

SMS SIEMAG AG · DE

Inventors

Johann Reichel · Mülheim an der Ruhr, DE
Lutz Rose · Goldkronach, DE

Key dates

Filing date	Oct 22, 2008
Grant date	Mar 13, 2012
Priority date	—
Expiry date	Nov 9, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22C37/08
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

In order to allow a significant reduction of the steel production cost when producing stainless steel with the alloying elements chromium and nickel, according to the invention, it is proposed to perform the intermediate production of ferrochrimium and ferronickel in two separate direct reduction processes based on low-cost chromium ore and nickel ore in two SAF (3, 4) arranged in parallel on the primary side of a processing converter (6).

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