PIG IRON PRODUCTION METHOD

A method for producing pig iron using a blast furnace with a tuyere according to one aspect of the present invention includes: stacking a first layer containing an iron ore raw material and a second layer containing coke alternately in the blast furnace; and charging the coke to a central portion of...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YAKEYA, Masahiro, KASAI, Akito
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING CALCULATING CHEMISTRY COMPUTER SYSTEMS BASED ON SPECIFIC COMPUTATIONAL MODELS COMPUTING COUNTING DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS,IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KINDOF FURNACE FURNACES FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL HEATING KILNS LIGHTING MANUFACTURE OF IRON OR STEEL MECHANICAL ENGINEERING METALLURGY METALLURGY OF IRON OPEN SINTERING OR LIKE APPARATUS OVENS PHYSICS RETORTS WEAPONS
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Beschreibung
Zusammenfassung:	A method for producing pig iron using a blast furnace with a tuyere according to one aspect of the present invention includes: stacking a first layer containing an iron ore raw material and a second layer containing coke alternately in the blast furnace; and charging the coke to a central portion of the blast furnace; and reducing and melting the iron ore raw material in the stacked first layer while injecting an auxiliary reductant into the blast furnace by hot air blown from the tuyere, in which: in the stacking, the charging of the coke is carried out once or a plurality of times during one charge of stacking a stacking unit composed of one of the first layer and one of the second layer; and a ratio R of a mass (ton/ch) of the coke accumulated in the central portion to a mass (ton/ch) of the iron ore material charged in the one charge is greater than or equal to a predetermined value α.