FACILITIES FOR REDUCING METAL OXIDE, METHOD FOR OPERATING THE FACILITIES AND MOLDINGS AS LAW MATERIAL TO BE CHARGED TO REDUCTION FURNACE

Title:

FACILITIES FOR REDUCING METAL OXIDE, METHOD FOR OPERATING THE FACILITIES AND MOLDINGS AS LAW MATERIAL TO BE CHARGED TO REDUCTION FURNACE

Document Type and Number:

WIPO Patent Application WO/2001/042516

Kind Code:

A1

Abstract:

A mixture comprising a metal oxide-containing powder and a carbon powder and water in an amount of 100 % or more relative to the total mass of both the powders is agitated for mixing to form a slurry. The slurry is dewatered so as to have a water content of 16 to 26 %, and the resultant product is subjected to compression molding to produce cylindrical or granular moldings having a thickness or diameter of 30 mm or less. The moldings are charged into a portion having an atmospheric temperature of 1170°C of a reducing furnace of rotary hearth type, and thereafter is reduced in the furnace to produce a metal. The above method for operating a reducing furnace of rotary hearth type allows the simplification of the process from dewatering to molding and thus results in a process for reducing a metal oxide at a lower cost, and further can provide a method for economical recycling of the dust and sludge produced in a process of refining or working of a metal.

Inventors:

IBARAKI TETSUHARU (JP)
HIROMATSU TAKASHI (JP)
KONDO SATOSHI (JP)
IMURA SHOJI (JP)
ABE YOICHI (JP)

Application Number:

PCT/JP2000/008771

Publication Date:

June 14, 2001

Filing Date:

December 12, 2000

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)
IBARAKI TETSUHARU (JP)
HIROMATSU TAKASHI (JP)
KONDO SATOSHI (JP)
IMURA SHOJI (JP)
ABE YOICHI (JP)

International Classes:

C21B13/10; (IPC1-7): C21B13/10

Foreign References:

JPH1112619A	1999-01-19
JPH0919607A	1997-01-21
JPS5245518A	1977-04-11
JPS5939095U	1984-03-12
JPH06206097A	1994-07-26
JPS4312496B1

Other References: