Re: Hammer In? / bog ore?
the problem is almost always on the actual iron content. You need in the
range of 50% Fe as a minimum to actually get a bloomery furnace to
produce any metal.
On quantity, there is a relationship between furnace size and minimum
load before the internal environment starts to produce a bloom. Working
with 25 - 30 cm internal diameter, that amount has proven to be at least
8 kg. Ideally you should be using 20 - 30 kg ore of suitable quality.
In the past it has proven most useful to provide a minimum quantity of
high grade ore (something like broken taconite) to balance against an
unknown local ore. This ensures a bloom for the public to see extracted
and consolidated. A lower Fe ore typically makes too much slag, but if
the team can keep taping successfully, this just makes for more
(exciting) activity for the audience.
PS - my own availability will depend largely on your set date, and if
there is any travel money
Darrell Markewitz - Artisan Blacksmith
the Wareham Forge - Historic Reproductions & Architectural Forgings
Interpretive Program Design - Norse Replicas / Viking Age Equipment
Blog : Hammered Out Bits
Introduction to Blacksmithing (DVD)
Historic Bladesmithing (DVD)
Forging the Viking Age (DVD)
Experimental Iron Smelting from the Viking Age (CD-ROM)
Exploring the Viking Age in Denmark (data DVD)
all available at http://www.warehamforge.ca/video.html
All materials created by Darrell Markewitz copyrighted the author.