At the point of the lime's entry into the
pug mill, water is added according to the stockpile moisture content of the aggregate.
The materials are combined and run through a
pug mill.
A belt conveyor carries this pressed sludge cake into a
pug mill mixer where sawdust is metered into the sludge.
The studio has a
pug mill, hydraulic press and tile cutter stamps.
To reduce maintenance and the resulting significant downtime caused from the erosion of
pug mill paddles during raw material processing, the CENEX Louisville plant replaced the traditional
pug mill with a "pug screw," a common material handling screw.
The "wet process" consists of adding crumb rubber to the paving asphalt before delivery to the
pug mill mixer, and has proven to be the most desirable method.
Potters mixing their own clays incur capital expenses for a mixer and
pug mill as well as raw material inventory.