It’s hard to overestimate the awesomeness of seeing metal splash around like water. Seeing Chicago Crucible transform small heaps of busted up iron into awesome art by using fire seemed to be a highlight for many.
The raw materials, from old radiators and such like, busted apart with sledgehammers, measured out with scientific precision.
These molds served as the final destination for the liquid iron. For $20, you could buy one of the square forms (to the left in the image) and carve it up however you like, and they would pour it for you. Observe the leftmost, already filled.
They’ve filled the furnace with coke and iron (and a bit of limestone, for flavor), and the iron has melted and flowed down through the furnace to collect at the bottom. Here we see them preparing the crucible to receive the molten iron for one in a series of pours, limited by the capacity of the portable equipment.
First, they position the crucible and bust away the stopper. You can see on the far side of the furnace some molten metal that has spilled out of a sort of overflow hole (also on the far side).
Behold the mouth of flame, speaking for a river of fire. Strong words.
They used these lumps of sandy material to stop up the mouth of flame between pours.
Observe them pouring out a series of molds. The splashiness of the iron took us by surprise, we expected something a bit more thick and sluggish.