竪型スクラップ溶解炉を用いた溶銑製造方法

Title:

竪型スクラップ溶解炉を用いた溶銑製造方法

Document Type and Number:

Japanese Patent JP4992549

Kind Code:

B2

Abstract:

To stably perform the operation without developing such problems as to increase the blasting pressure and drop the molten iron tapping temperature and slag temperature, when the molten iron is produced by using dust-agglomerate as a part of the charging material into a vertical-type scrap-melting furnace.

In the method for producing the molten iron by charging iron-based scrap, the dust-agglomerate for agglomerating the dust containing metallic oxide, and coke into the vertical-type scrap-melting furnace and blasting hot blast from a plurality of tuyeres arranged at the lower part of the furnace; the operation is performed so that a typical length R(m) of the dust-agglomerate charged into the vertical-type scrap-melting furnace and the molten iron producing speed W(t/m2×hr), satisfy formula (1), 0.018≤R≤0.090-0.00333×W, or desirably, formula (2), 0.018≤R≤0.065-0.00233×W.

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JPH03240910	MOLTEN IRON TAPPING HOLE IN SMELTING REDUCTION FURNACE
WO/2002/075000	MODULAR SHAFT FOR REDUCTION SMELTING
JPH0788524	INDUSTRIAL APPLICABILITY [Title of Invention] Operation method of metal melting reduction furnace

Inventors:

Yoshitaka Sawa
Matsuno Hidetoshi
Ryota Murai
Yukio Takahashi
Mutsumi Tada

Application Number:

JP2007139792A

Publication Date:

August 08, 2012

Filing Date:

May 26, 2007

Export Citation:

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Assignee:

jfe Steel Corporation

International Classes:

C21B11/02; C22B1/243; C22B19/30; F27B1/10; C22B7/02

Domestic Patent References:

JP55125211A
JP5320779A
JP2000204409A
JP2003027150A
JP2001208317A
JP2008291333A
JP2008291334A

Attorney, Agent or Firm:

Hideto Tomabechi

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