free-milling gold

free-milling gold

[′frē ‚mil·iŋ ′gōld]
(metallurgy)
Gold that has a clean surface so that it readily amalgamates with mercury (by gravity or on blankets) after liberation by comminution.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The percentage of recovery was over 95% (w/w), which complies with the recovery rate expected for a free-milling gold ore (see figure 1).
Gold is associated with sphalerite and pyrite, and is typically identified visually as free-milling gold within quartz or at the margins of sulfide crystals.