This is a Hungarian cast iron Furnace Door. The model was made in Maya, and final images rendered with V-Ray in 3ds Max.
Furnace doors put into a beehive oven
Bigger Furnace Door
http://www.turbosquid.com/3d-models/furnace-door-3d-model/599689?referral=Andor-Kollar
Smaller Furnace Door
http://www.turbosquid.com/3d-models/3d-furnace-door-2/600181?referral=Andor-Kollar
2011