PROCESS FOR SMELTING NICKEL OXIDE ORE

Japanese Patent JP2017036473

A

PROBLEM TO BE SOLVED: To provide a process for smelting nickel oxide ore by forming pellets from nickel oxide ore and reduction-heating the pellets in a smelting furnace to produce an iron-nickel alloy, and in which, by effectively proceeding the smelting reaction in a reduction step, the fusion of the pellets can be prevented, and an iron-nickel alloy having a high nickel grade can be produced.SOLUTION: The process for smelting nickel oxide ore according to the present invention includes a pellet producing step S1 for producing pellets from nickel oxide ore and a reduction step S2 for reduction-heating the obtained pellets in a smelting furnace, and in which: in the pellet producing step S1, at least a raw material containing nickel oxide ore and a carbonaceous reducing agent is mixed to form a mixture, and the mixture is agglomerated to form pellets; and in the reduction step S2, the pellet obtained in the pellet producing step S1 is placed on the hearth floor of a smelting furnace having a metallic hearth floor and is subjected to a reduction heat treatment by controlling at a predetermined reduction temperature and at a predetermined reduction treatment time.SELECTED DRAWING: Figure 4

TAKAHASHI JUNICHI
OKADA SHUJI
AIDA SACHIHIRO

JP2015157993A

February 16, 2017

August 10, 2015

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SUMITOMO METAL MINING CO

C22B23/02; C22B1/14; C22B5/10

JPS4828317A	1973-04-14
JPS4911290B1	1974-03-15
JPS6223944A	1987-01-31
JPH06108176A	1994-04-19
JPS472553A
JPH11106840A	1999-04-20
JP2001254114A	2001-09-18
JP2010196148A	2010-09-09
JPH11337264A	1999-12-10

Masayuki Masabayashi
Hayashi Ichiyoshi

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