For Great River Energy’s Dryfining project, Barr provided detail engineering support for the procurement and installation of an air jig system at Coal Creek Station. The jigs were designed to discharge pyrite rejects—in dry form—from the fluidized bed dryers. Previously, jet-style pumps sluiced the mixture of water and pyrites to existing ponds. To reduce water use, GRE wanted to create a dry transport system for the pyrites and a new truck load-out station to enable the disposal in an existing landfill.
Barr investigated and developed three options and cost estimates for conveying the pyrites from the existing storage bin to the new, truck load-out facility. We then used the information developed in the options study to further develop the design basis for the selected conveying and load-out system. Barr completed the mechanical, electrical, civil, and structural engineering required to develop the drawings and specifications required for a complete installation of the dry conveying and truck load-out equipment.