METHOD FOR PRODUCING STARTING MATERIAL FOR SINTERING

WIPO Patent Application WO/2012/015063

A1

Provided is a method for producing a starting material for sintering, wherein it is possible to improve productivity compared to conventional methods by effectively using ultrafine limestone powder and high-carbon dust during the process in which the surface of pseudo particles is being covered with a limestone-based powder starting material and a solid-fuel-based powder starting material. When forming a limestone-based powder starting material inner layer by supplying a limestone-based powder starting material to the surface of pseudo particles obtained by granulating a material containing SiO2 and iron ore and when forming a solid-fuel-based powder starting material outer layer by supplying a solid-fuel-based powder starting material on the limestone-based powder starting material inner layer, a limestone-based powder starting material containing 5 to 40 mass% of ultrafine limestone particles is used as the limestone-based powder starting material and a solid-fuel-based powder starting material containing 5 to 40 mass% of high-carbon dust is used as the solid-fuel-based powder starting material.

HIGUCHI TAKAHIDE (JP)
OYAMA NOBUYUKI (JP)
TAKEUCHI NAOYUKI (JP)
NUSHIRO KOUICHI (JP)

PCT/JP2011/067717

February 02, 2012

July 27, 2011

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JFE STEEL CORP (JP)
HIGUCHI TAKAHIDE (JP)
OYAMA NOBUYUKI (JP)
TAKEUCHI NAOYUKI (JP)
NUSHIRO KOUICHI (JP)

C22B1/16

JP2000248309A	2000-09-12
JP2005089825A	2005-04-07
JP2008101263A	2008-05-01
JP2006063375A	2006-03-09
JP2009185356A	2009-08-20
JP2008095177A	2008-04-24
JP2003138319A	2003-05-14
JP2004204332A	2004-07-22
JP2004190045A	2004-07-08
JP2000192153A	2000-07-11

OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)

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