12-24-2008, 09:20 PM
Looks to me to be a GERN #7B (that side-mounted electrical box was the give-away that it was a Model B) Flux Roaster - used to bring the crushed ore to a uniform moisture content before milling. It was a big improvement over the #6 Roaster, as it recycles the removed moisture, injecting it, under pressure, into stock whose moisture content is too low. I hope that you're planning on adding lifting lugs for the plant crane to move it to its operating pedestal. 
Wayne
Wayne