MOLTEN IRON MANUFACTURING FACILITY AND MOLTEN IRON MANUFACTURING METHOD

Title:

MOLTEN IRON MANUFACTURING FACILITY AND MOLTEN IRON MANUFACTURING METHOD

Document Type and Number:

WIPO Patent Application WO/2018/105910

Kind Code:

A1

Abstract:

A molten iron manufacturing facility, according to the present invention, comprises: a fluidized reduction furnace which manufactures reduced iron by reducing iron ore fines; a melter gasifier which receives the reduced iron from the fluidized reduction furnace and manufactures molten iron by drawing oxygen into the inside thereof and melting the reduced iron; and a cold pig iron storage bin which stores cold pig iron manufactured by solidifying the molten iron manufactured in the melter gasifier and introduces the cold pig iron into the melter gasifier. As such, according to an embodiment of the present invention, it is possible to melt the reduced iron at a temperature lower than that of a conventional technique by introducing the cold pig iron into the melter gasifier. That is, the melting point of the reduced iron is lowered due to the introduction of the cold pig iron such that the reduced iron begins to melt at a temperature lower than that of a conventional technique. As such, unmolten reduced iron is not generated or is minimized in the melter gasifier, thereby preventing problems such as an increase in deviation of molten iron tapping due to the unmolten reduced iron, instability of the circulation of a reducing gas, and an increase in fuel costs.

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Inventors:

PARK JI OOK (KR)
KIM HYUN SOO (KR)
CHOI MOO EOB (KR)
LEE DAL HOI (KR)
JANG YOUNG JAE (KR)

Application Number:

PCT/KR2017/012806

Publication Date:

June 14, 2018

Filing Date:

November 13, 2017

Export Citation:

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Assignee:

POSCO (KR)

International Classes:

C21B13/14; C21B13/00; C22B1/248

Foreign References:

JP2001108379A	2001-04-20
KR20050085762A	2005-08-29
KR20020087214A	2002-11-22
JP2003113413A	2003-04-18
KR20140131608A	2014-11-14

Attorney, Agent or Firm:

NAM, Seung-Hee (KR)

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