The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 20, 2001
Filed:
Mar. 31, 2000
Jin Kyung Jung, Cheonram-do, KR;
Sang Suk Yuk, Cheonram-do, KR;
Bong Rae Cho, Cheonram-do, KR;
Gap Ryeol Kim, Cheonram-do, KR;
Youn Sueg Choi, Cheonram-do, KR;
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.