METHOD AND FACILITIES FOR METAL SMELTING

Title:

METHOD AND FACILITIES FOR METAL SMELTING

Document Type and Number:

WIPO Patent Application WO/2001/018256

Kind Code:

A1

Abstract:

A method for metal smelting, which comprises a step of pre-reducing a mixed raw material provided by mixing in advance or mixing-granulating or mixing-molding at least a metal oxide and/or hydroxide and a carbonaceous material in a pre-reduction furnace such as a rotary hearth type or rotary kiln type furnace so that 5 to 55 % of the metal oxide and/or hydroxide is reduced to metallic state on average, and a step of charging the pre-reduced mixed material to a smelting furnace for use in metal smelting and melting and finally reducing the material in the smelting furnace by using a carbonaceous material as a reducing agent and utilizing the combustion heat of the carbonaceous material and that of the carbon monoxide generated in the furnace as main heat sources. The method allows the production of a molten metal with good energy balance and high efficiency in production, and thus enables the production of a molten metal by the smelting reduction of a metal oxide and/or hydroxide such as an iron ore with high productivity and at a low cost.

Inventors:

IWASAKI KATSUHIRO (JP)
ISOZAKI SHINICHI (JP)
SEKIGUCHI TAKESHI (JP)
TAGUCHI NORIHIKO (JP)

Application Number:

PCT/JP2000/005916

Publication Date:

March 15, 2001

Filing Date:

August 31, 2000

Export Citation:

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Assignee:

NIPPON KOKAN KK (JP)
IWASAKI KATSUHIRO (JP)
ISOZAKI SHINICHI (JP)
SEKIGUCHI TAKESHI (JP)
TAGUCHI NORIHIKO (JP)

International Classes:

C21B13/10; C21B13/14; C22B1/245; C22B5/10; (IPC1-7): C21B11/00; C22B1/16; C22B5/10

Foreign References:

JPH11217614A	1999-08-10
JPH09165612A	1997-06-24
JPH08253801A	1996-10-01
JPS62230923A	1987-10-09

Other References: