METHOD FOR PRODUCING SINTERED ORE

Title:

METHOD FOR PRODUCING SINTERED ORE

Document Type and Number:

WIPO Patent Application WO/2018/194014

Kind Code:

A1

Abstract:

Provided is a method for producing a sintered ore capable of improving yield of a sintered ore in the upper part of a charge layer by increasing the proportion of a coagulating material in the upper layer of a pallet without introducing any new equipment to thereby extend a period for retaining the upper part of the charge layer in a high temperature condition. The method for producing a sintered ore comprises sintering a granulated raw material to be sintered in a sintering machine, wherein: the raw material to be sintered contains an iron-containing raw material that includes 5% by mass or more, in relation to the total mass of the raw material to be sintered, of a powder iron ore having a particle size of 10 μm or less, 3%-7% by mass, in relation to the total mass of the raw material to be sintered, of a coagulating material that includes 50% by mass or more of a coke breeze having a particle size of 1 mm or less, and a CaO-containing raw material; at least the iron-containing raw material is stirred before granulation of the raw material to be sintered; and a part or the whole of the coagulating material is mixed and granulated in a 50%-95% elapsed time in the total granulation period of the raw material to be sintered, when the total granulation period is taken as 0%-100% elapsed time from the start to the end thereof.

More Like This:

WO/2004/099452	IRON ORE PELLETS WITH REDUCTION OF ABRASION, STICKING, DEGRADATION AND DUST EMISSION, AND ITS PRODUCTION PROCESS
JP5950098	A manufacturing method of sintered ore

Inventors:

HIROSAWA TOSHIYUKI (JP)
TAKEHARA KENTA (JP)
YAMAMOTO TETSUYA (JP)

Application Number:

PCT/JP2018/015667

Publication Date:

October 25, 2018

Filing Date:

April 16, 2018

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

C22B1/16

Domestic Patent References:

WO2017026203A1

2017-02-16

Foreign References:

JP2016084511A	2016-05-19
JP2011252207A	2011-12-15
JP2015168828A	2015-09-28
JP2016020521A	2016-02-04
JP2013032568A	2013-02-14

Attorney, Agent or Firm:

KUMASAKA Akira et al. (JP)

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