Nucor Steel Texas’ baghouse was built with five forward-curved, radial tipped centrifugal main air fans rated at 330,000 acfm and connected with 1,750-hp motors. It was originally designed with four operating fans, one in-line spare, and two LMS fans connected with 1,250-hp motors.
Additionally, a reverse air fan provided negative pressure to clean the baghouse bags. However, due to their design, the fans were prone to dust impact at steep angles, causing erosion of the blades. This constant erosion meant that NSTX was faced with the decision to either conduct major fan blade maintenance and repair or to completely replace the fan blades.