Concentrators Inside the pilot copper concentrator. Related Similar Images ...based on the tags: machinery, tanks... Grain is taken from the bottom of the silos through a conveyor in a tunnel. These blowers keep the air in the tunnel fresh. This wheel scoops the washings from the sluice room and places it on the tailings conveyor. A sort of blender in a powder line building. The top vent had been removed, so leaves and light fall onto the teeth now. These machines had embossed metal numbers marking their ends. A closeup inside the mill’s power room. From the highest roof of Ogvilvie’s, Thunder Bay looks like paradise. Looking down at the Port Arthur Ore Dock from Manitoba Pool Elevator #3. The conveyor belts are gone and King Elevator is in the far distance. These steam powered pumps were integral to the cooling of the meat packing plant next door. Looking at the side of 4B from the roof of its car shed.