percentage extraction

percentage extraction

[pər′sen·tij ik′strak·shən]
(mining engineering)
The proportion of a coal seam or other ores which is removed from a mine.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The percentage extraction was found to increase with increasing acid concentration, giving a maximum value of 89.89 % with 7 mole L-1 of HNO3.
The percentage extraction increased with increasing TBP concentration and maximum was observed with its 25 % solution [9].
The comparison of composition of the ethanol and acetone extracts of Eruca sativa (Taramira) and Rananculus muricatus (Castor) reveals that the solvent influences the percentage extraction of different acids.
Figure 12 shows that process temperatures at which the percentage extraction of BA was maximum using various extraction techniques were found to be 70[degrees]C (0.27% w/w), 25[degrees]C (0.25%w/w), 68[degrees]C (0.34% w/w), and 70[degrees]C (0.39%w/w) for STR, USO, SOX, and MAE techniques, respectively.
TWP is to furnish the major part of the treatment plant, extraction of gold, and give a guarantee of percentage extraction performance in exchange for a toll-fee per tonne.
Earlier mining studies identified that open stopping options led to poor recoveries (low percentage extraction) as well as having safety risks.
Percentage extraction is 60-75% and continuous miner utilisation is 70%.
We can now set up the optimal extraction problem as that of choosing a time path of percentage extraction rates [Mathematical Expression Omitted] to maximise
This company's experience is also that percentage extraction by longwall is lower than with continuous mining.
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