METHOD FOR TREATING STEELMAKING SLAG

Title:

METHOD FOR TREATING STEELMAKING SLAG

Document Type and Number:

Japanese Patent JP2007297693

Kind Code:

A

Abstract:

To obtain the high quality of slag scarcely containing free CaO and gas bubble and also, to improve the outward appearance of steelmaking slag and to sufficiently recover the valuable components in the steelmaking slag, by performing a reform-reduction treatment of the steelmaking slag while keeping molten state of the slag, in the treating method of the steelmaking slag generated at the refining time in a steelmaking process.

Molten steelmaking slag is charged into a reaction-vessel, holding molten iron , and SiO2-containing reforming material and carbon source for reduction, are added into the molten steelmaking slag charged into the reaction-vessel, and the modification treatment and the reduction treatment of the steelmaking slag, are performed while holding the molten state of the steelmaking slag.

Inventors:

MOROHOSHI TAKASHI
NAKAJIMA JUNJI
MATSUO MITSUTAKA

Application Number:

JP2006129052A

Publication Date:

November 15, 2007

Filing Date:

May 08, 2006

Export Citation:

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Assignee:

NIPPON STEEL CORP

International Classes:

C21C5/28; B09B3/00; C04B5/06; C21C1/02; C21C7/00; F27D15/00

Domestic Patent References:

JP2006144033A	2006-06-08
JP2006199984A	2006-08-03
JPH06115984A	1994-04-26
JPH09263430A	1997-10-07
JP2004331461A	2004-11-25
JP2005306654A	2005-11-04
JP2000233953A	2000-08-29
JPS5148480B2	1976-12-21

Attorney, Agent or Firm:

Miaki Kametani
Tetsuo Kanamoto
Koji Hagiwara

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