Patent · US Expired

Method for producing iron carbide from granulated sponge iron

US6627171B2 · kind B2 · utility

0Cited by

6References

2Claims

0Family size

Assignee

Metallgesellschaft AG · DE

Inventors

Martin Hirsch · Friedrichsdorf, DE
Michael Stroeder · Frankfurt am Main, DE
Peter Weber · Delmar, US

Key dates

Filing date	Mar 15, 2000
Grant date	Sep 30, 2003
Priority date	—
Expiry date	Mar 15, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P10/143
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Process for producing Iron carbide wherein, in a first stage, Iron ore is reduced to sponge iron using a reducing gas containing at least 90% hydrogen, on a nitrogen-free basis, to produce a sponge iron having a carbon content of less than 1% wt.; then in a second stage the sponge iron is fluidized at a temperature of 500 to 800° C. with a methane-containing fluidizing gas in a fluidized bed reactor wherein the water content of the gas in the reactor is not more than 1.5% wt., to produce a product wherein at least 85% of the iron content is in the form of Fe3C.

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