Method for producing sponge iron, and reduced iron powder...

Details Method for producing sponge iron, and reduced iron powder... Method for producing sponge iron, and reduced iron powder...

2005-07-19

2005-07-19

Wyszomierski, George (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

Producing or purifying free metal powder or producing or...

C075S369000, C075S436000, C075S471000

Reexamination Certificate

active

06918945

ABSTRACT:
A method for manufacturing sponge iron includes heating iron oxide together with a solid reducing agent to reduce the iron oxide into sponge iron, wherein the iron oxide includes a mixture of powdered hematite and powdered iron ore or a mixture of powdered hematite and powdered mill scale, the powdered hematite has a specific surface area of 2.0 m2/g or more, and the content of the powdered hematite is 5-45% by mass with respect to the total quantity of iron oxide.

REFERENCES:
patent: 4334920 (1982-06-01), Mori et al.
patent: 5277368 (1994-01-01), Kindig
patent: 5750045 (1998-05-01), Nihira et al.
patent: 5972066 (1999-10-01), Lehtinen
patent: 6048382 (2000-04-01), Greenwalt
patent: 6302952 (2001-10-01), Mobbs et al.
patent: 6-279824 (1994-10-01), None

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