Title:
METHOD FOR RECYCLING CONVERTER DUST, AND BLAST FURNACE RAW MATERIAL
Document Type and Number:
Japanese Patent JP2014173139
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for recycling converter dust, in which the converter dust, that is obtained by using zinc-containing dust as an iron source and generated by blowing, can be recovered easily and surely as a blast furnace raw material.SOLUTION: The method for recycling converter dust comprises steps of: agglomerating dust containing iron and zinc; recovering the converter dust to be generated after blowing is started; and charging the agglomerated dust in the converter after blowing is started. At the step of recovering the converter dust, a ratio (%) of the supplied oxygen amount to the total oxygen amount to be supplied by blowing is smaller than Z1 which is shown by the following expression, or larger than Z2, which is also shown by the following expression. Z1=12.1+1.39×B+q1/Q×74.8 and Z2=50.5+1.61×B+q2/Q×34.5 (in which q1 is the supplied oxygen amount when charge of the agglomerated dust is started; q2 is the supplied oxygen amount when the charge of the agglomerated dust is completed at the step of charging the agglomerated dust in the converter after blowing is started.
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Inventors:
SUGITANI TAKASHI
MAEDA KENTARO
SAWAYAMA MUNEYOSHI
MAEDA KENTARO
SAWAYAMA MUNEYOSHI
Application Number:
JP2013047069A
Publication Date:
September 22, 2014
Filing Date:
March 08, 2013
Export Citation:
Assignee:
KOBE STEEL LTD
International Classes:
C22B7/02; C21C5/38; F27D17/00
Attorney, Agent or Firm:
Kazuki Amano
Yoshinori Ikeda
Hiroo Ogawa
Koji Ishida
Koju Kagami
Yoshiaki Negi
Takashi Shiotani
Yoshinori Ikeda
Hiroo Ogawa
Koji Ishida
Koju Kagami
Yoshiaki Negi
Takashi Shiotani