Air (or oxygen
) is injected into a hearth
under pressure from bellows
or a blast engine or
other devices. This causes the fire to be hotter in front of the
blast than it would otherwise have been, enabling metals to be
or made hot enough to be
worked in a forge
applies to any process where a blast is delivered under pressure to
make a fire hotter.
The term (like many technical terms relating to
ironmaking) was introduced to England with the new technology of
and finery forge
in around 1500
, and was
sometimes anglicised as tu-iron.
Following the introduction of hot blast
tuyeres were often water cooled.