METHOD FOR PRODUCING HEMATITE FOR IRON-MAKING USE

Title:

METHOD FOR PRODUCING HEMATITE FOR IRON-MAKING USE

Document Type and Number:

WIPO Patent Application WO/2013/140900

Kind Code:

A1

Abstract:

Provided is a production method which enables the purification of hematite having a low sulfur component content from an iron-oxide-containing leach residue produced in an HPAL process to such an extent that the hematite can be used as an iron-making raw material. A method for purifying iron oxide for iron-making use in a process comprising adding sulfuric acid to a nickel oxide ore and allowing nickel to be leached out from the nickel oxide ore using a pressurized container, said method being characterized in that the amount of the sulfuric acid to be added is 150 to 220 Kg inclusive relative to 1 ton of the nickel oxide ore.

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Inventors:

OZAKI YOSHITOMO (JP)
ENOMOTO MANABU (JP)
SHOUJI HIROFUMI (JP)
HIGAKI TATSUYA (JP)

Application Number:

PCT/JP2013/053411

Publication Date:

September 26, 2013

Filing Date:

February 13, 2013

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)

International Classes:

B09B3/00; C22B3/04; C22B23/00

Domestic Patent References:

WO2007053919A1	2007-05-18
WO2007095689A1	2007-08-30

Foreign References:

JP2010095788A	2010-04-30
JPH03176081A	1991-07-31

Other References: