SINTERED ORE AND METHOD FOR PRODUCING SAME, AND SINTERED ORE FOR HYDROGEN REDUCTION AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2024/028923

A1

Provided is a sintered ore that has improved reduction characteristics and reduced disintegration-during-powdering characteristics. Proposed is a method for producing the sintered ore. Further provided are a sintered ore for hydrogen reduction, and a method for producing same. The present invention is a sintered ore for which the ratio PA/PB is at least 0.23. PA (percentage by volume) is porosity measured by mercury penetration after a sintered ore with a particle diameter of at least 5 mm has been pulverized so that the mean particle diameter is in the range 1–2 mm, and PB is porosity determined using apparent density measured by weighing the sintered ore in liquid using water and true density measured by boiling or by vacuum suction after pulverizing and sifting the sintered ore to the particle diameter smaller than 250 μm. The present invention is a method for producing a sintered ore using raw materials that include an ore with a crystal-bound water content of at least 4% by mass. Furthermore, the present invention is a sintered ore for hydrogen reduction for which the porosity ratio PA/PB is at least 0.25.

HORITA KENYA (JP)
YAMAMOTO TETSUYA (JP)
HIGUCHI TAKAHIDE (JP)
HIROSAWA TOSHIYUKI (JP)
IWAMI YUJI (JP)
TAKEHARA KENTA (JP)
FUJIWARA SHOHEI (JP)
IGAWA DAISUKE (JP)
MORITA YUYA (JP)

PCT/JP2022/029424

February 08, 2024

August 01, 2022

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JFE STEEL CORP (JP)

C21B13/02; C22B1/16

JP2017106064A	2017-06-15
JP2007100150A	2007-04-19
JP2009149942A	2009-07-09
JP2007327096A	2007-12-20
JP2000178660A	2000-06-27
JP2002129247A	2002-05-09

GINZA MARONIE P.C. (JP)

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