Welcome to the Antique-Shop forum, lowcountry.
I'm guessing that it's a kettle for boiling down M. syrup?
It's possible that it may actually be a 'rendering' kettle, as cogar posted.
It would be great to see an image or 2 , if you could post some.
Here's an image of a 20gal unit, ($1700 on Ebay) with it's original stove (rendering):