Pohang Iron & Steel Co. Ltd.

Bong Rae Cho

Jin Kyung Jung

Gap Ryeol Kim

Sang Suk Yuk

Youn Sueg Choi

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.

Growing community of inventors

Cheonram-do, South Korea

Bong Rae Cho