Dave, . . . . . I have figured out what it was.
That was your reply to the comment that you can't figure out what kept the steel molten
Wrong! I said thermite is the only known cause of the molten steel in the first place and I don't know how it stayed molten for 6 weeks.
So now you
haven't figured out what it was.
Chris, as long as you're unable to figure out how the steel stayed molten for six weeks, then you don't know what heat sources were present in the rubble pile, and what temperatures they were capable of generating. As long as you don't know that, then you can't prove that there wasn't something going on other than thermite that could melt steel. It doesn't matter what it was; if there was molten steel, there must have such a process present. As long as you don't know what it was, you can't make informed claims about what it could and couldn't do.
And, of course, the reason I keep coming back to "If there was molten steel", is that
you still haven't proved even that. You've simply given some anecdotal evidence that some people
thought there was molten steel present, and repeated your own interpretation of a couple of photographs.
So what you have is an unproven assertion that, if true, wouldn't prove your central claim. You're two broken links short of a chain of evidence.
Dave