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.
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).
Yen, "Improved Grindability and Gold Liberation by Microwave Pretreatment of a Free-Milling Gold Ore", Miner.
The good news about Prestea ores, which will be treated over the next 5 to 6 years, is that its coarse, free-milling gold has less arsenopyrite content.