Unidentified Equipment

There was a group of about 4 or 5 of these 'sifters' (I'm not sure what they really are), complete with conveyor belt underneath. Unfortunately there was absolutely no light here whatsoever, so to take this photo I had to use a flash and a long exposure (I couldn't focus either...). In the end this is just a documentation shot to show some of the differing types of equipment found.