The First Relining of No. 5 Blast Furnace at Gwangyang Steelworks was a project aimed at ensuring safe operation in response to the aging of facilities and increasing crude steel production through expansion of the blast furnace volume (3,950 m3 → 5,500 m3, increase by 39.2%). This was POSCO E&C’s first project of the newly established No. 5 Blast Furnace which was installed with our independently developed technology.