The only thing outside a foundry, other than a cutting or welding torch. I guess you missed that part.
Do you understand this part?
As soon as the metal liquefied it would flow away from the heat source under the force of gravity. Therefore, the color of the liquid flowing from the 82nd floor was at approximately the melting point of the metal.
Aluminum melts at about 1220[FONT="]°[/FONT]F
The metal flowing out of the south tower was in the 2400-2700[FONT="]°[/FONT]F range.
And therefore, it was molten iron from steel.
The other possibilities are:
Melting point
2240[FONT="]°[/FONT]F manganese
2590[FONT="]°[/FONT]F silicone
2650[FONT="]°[/FONT]F nickle
2700[FONT="]°[/FONT]F cobalt
2750[FONT="]°[/FONT]F chromium
These metals or silicone would not be found in enough quantity to be the molten metal in the video.