To hell with ovens; maybe they can produce iron? (5-8)

I believe the answer is:

blast-furnaces

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'they can produce iron?' is the definition.
I know nothing about this answer so I cannot tell whether this works.

'to hell with ovens' is the wordplay.
'to hell with' becomes 'blast' (I can't explain this - if you can you should believe this answer much more).
'ovens' becomes 'furnaces' (I've seen this before).
'blast'+'furnaces'='BLAST-FURNACES'

'maybe' is the link.

Can you help me to learn more?

I've seen this clue in The Irish Times.

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