Care and Lubrication of a Model 13 Laboratory Wilfley Table
June 2016 by Roger NeuschelerA Wilfley table works best when all of the mineral being run across it (the pulp) is about the same size. For this reason, I took a good look at each of the samples.
The solution focused on the relative difference in malleability between gold and waste, rather than the difference in density exploited by gravity circuits.
I’ve been in enough mines to know better, and I mentally kicked myself several times. That was a close call…
Improper sampling techniques lead to more avoidable heartache than almost anything else in micro mining.
At first, I tried to shift things around, but then a hand with a rock would appear, so I would stop trying to adjust my gear and grab the rock to keep things moving.
Since this position was the least desirable due to the hard physical labor, the bucking room was used as punishment. Do you have a mediocre worker? Bad attitude? Off to the bucking room!
The next hurdle to jump was whether the trommel motor would start again after sitting on the desert for six years without being started. The last time it had taken a three foot pipe wrench to bust it loose.
All these decisions and more depend on the richness of a claim—something that is determined by sampling. But sampling isn’t cheap, and even collecting the samples can be more difficult than it appears on the surface.
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