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Title:
METHOD FOR PRETREATING HIGH CRYSTAL WATER IRON ORE
Document Type and Number:
Japanese Patent JP2009074107
Kind Code:
A
Abstract:

To provide a method for pretreating high crystal water iron ore by which, when heating iron ore having high crystal water content, the iron ore can be modified into iron ore having high porosity and high crushing strength while suppressing the occurrence of cracking, attendant on dehydration, in iron-ore particles and powdering.

The method for pretreating the high crystal water iron ore is characterized in that iron ore containing 3 mass% crystal water is heated at 250C in a fluid having a pressure not lower than saturated steam pressure.


Inventors:
FUJIOKA YUJI
KANEHASHI KOJI
OKAZAKI JUN
Application Number:
JP2007241253A
Publication Date:
April 09, 2009
Filing Date:
September 18, 2007
Export Citation:
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Assignee:
NIPPON STEEL CORP
International Classes:
C22B1/00; C22B1/16; C21B5/00
Domestic Patent References:
JPH07150260A1995-06-13
JPH05339654A1993-12-21
JPH0310027A1991-01-17
JPH11100607A1999-04-13
JP2000144265A2000-05-26
JPS5633438A1981-04-03
JPS5848642A1983-03-22
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Hiroshi Kamematsu
Nakamura Asayuki
Nagasaka Tomoyasu