free-milling ore

free-milling ore

[′frē ‚mil·iŋ ′ȯr]
(mining engineering)
Ore containing gold which can be caught with mercury by a variety of gravity processes or on blankets.
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References in periodicals archive ?
[4] performed an analysis of the influence of microwave heating in a free-milling ore. They found that by using dielectric heating, the crushing strength (an important variable for grinding) was reduced by 31.2 % and the reception of reagents was increased, thus reducing the leaching time from 22 hours to just 12.
Feed for the expanded plant will be supplied initially from near-mine resources at Paulsens and after about three years from free-milling ore at Ashburton.
For example, the share of free-milling ores in Russian placer deposits is only about 12% of all proven reserves, while in Indonesia this figure is close to 100%.