
(from the article `iron processing`) ...two types of furnace came into use. Bowl furnaces were constructed by digging a small hole in the ground and arranging for air from a bellows to ... The earliest kind of firing equipment was the shaft furnace. This was followed by the grate-kiln and the traveling grate, which together account for ...
Found on
http://www.britannica.com/eb/a-z/s/73

See furnace.
Found on
http://www.encyclo.co.uk/local/20766

A melting furnace classically used (i) for continuous melting of copper cathode as
Found on
http://www.metalbulletin.com/Glossary.html
No exact match found.