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Question:

what ore does iron come from?

it comes from iron ore right?any random extra information would be nice.

Answer:

The answer is there, right in your question. :)
Hematite is the best mineral to get iron from. BIFs (or Banded Iron Formations) is a good example of rock that has a lot of hematite. The rocks only have to have above about 18% iron content to be viable as ore.
Dont feel like reading all that, but its probably just all the gaskets and factoring coating burning off. Things usually have a weird small after getting heated for the first times.

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