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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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[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.