Title:
【発明の名称】粉砕石炭の導入装置
Document Type and Number:
Japanese Patent JP2002522639
Kind Code:
A
Abstract:
A pulverized coal injecting apparatus includes a cylindrical inner pipe for feeding pulverized coal into a tuyere of a blast furnace. A cylindrical outer pipe coaxially surrounds the inner pipe. A spiral swirler is formed on the surface of the inner pipe and the pulverized coal is supplied through the inner pipe, while a combustible fluid is supplied through a space defined between the outer and inner pipes. The pulverized coal injecting apparatus further includes a plurality of dimples formed on a surface of a leading end portion of the inner pipe for reducing fluid flow resistance so as to improve the mixing of the pulverized coal with the combustible fluid. The fluid flow becomes efficient so as to improve the combustion efficiency of the pulverized coal. Thus, the oxygen enrichment cost and fuel costs are reduced.
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Inventors:
Jung, Jin Kung
Yuku, Sangsk
Cho, Bong Lae
Kim, Gap Eol
Choi, Youn Sueg
Yuku, Sangsk
Cho, Bong Lae
Kim, Gap Eol
Choi, Youn Sueg
Application Number:
JP2000565196A
Publication Date:
July 23, 2002
Filing Date:
August 09, 1999
Export Citation:
Assignee:
Pohang Iron and Steel Company Limited
International Classes:
C21B5/00; C21B7/00; (IPC1-7): C21B7/00
Attorney, Agent or Firm:
Masaaki Kobayashi