1) Metallurgical process
Found on
https://www.crosswordclues.com/clue/smeltmill
Smeltmills were water-powered mills used to smelt lead or other metals. The older method of smelting lead on wind-blown bole hills began to be superseded by artificially-blown smelters. The first such furnace was built by Burchard Kranich at Makeney, Derbyshire in 1554, but produced less good lead than the older bole hill. William Humfrey (the Que...
Found on
http://en.wikipedia.org/wiki/Smeltmill
No exact match found.
