METHOD FOR SMELTING SAPROLITE ORE - SUMITOMO METAL MINING CO

Title:

METHOD FOR SMELTING SAPROLITE ORE

Document Type and Number:

WIPO Patent Application WO/2016/136068

Kind Code:

A1

Abstract:

Provided is a smelting method whereby a reaction for reducing pellets, said pellet being formed by using a saprolite ore as a starting material, can be effectively conducted and thus an iron/nickel alloy having a nickel grade of, for example, 16% or greater that satisfies Japanese Industrial Standards for ferronickel can be obtained. The method according to the present invention for smelting a saprolite ore, whereby an iron/nickel alloy having a nickel grade of 16% or greater can be obtained by heating and reducing pellets formed from the saprolite ore, comprises: a pellet production step (S1) for producing the pellets from the saprolite ore; and a reduction step (S2) for heating and reducing the obtained pellets in a smelting furnace. In the pellet production step (S1), at least the saprolite ore and a preset amount of a carbonaceous reducing agent are mixed together to produce the pellets. In the reduction step (S2), a hearth carbonaceous reducing agent is preliminarily spread on the hearth of the smelting furnace and the pellets produced above are placed on the hearth carbonaceous reducing agent and then subjected to a heat reduction treatment.

Inventors:

TAKAHASHI JUNICHI (JP)
INOUE TAKU (JP)
OKADA SHUUJI (JP)

Application Number:

PCT/JP2015/083784

Publication Date:

September 01, 2016

Filing Date:

December 01, 2015

Export Citation:

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Assignee:

SUMITOMO METAL MINING CO (JP)

International Classes:

C22B23/02; C21B13/10; C22B1/16; C22B5/10

Domestic Patent References:

WO2010032513A1

2010-03-25

Foreign References:

JP2004156140A	2004-06-03
JPS50105506A	1975-08-20
JP2010229525A	2010-10-14

Other References: