Ask The Experts
December 2014 by Chris Ralph• Determining the amount of gold in a specimen
So far this year we have recovered over three pounds of gold and the hard rock veins seem to go on forever. We now have three claims that can produce good enough gold to set up a productive operation.
A 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.
I researched the Internet and found a number of table makers, but technology has changed in the last 25 years. No one could sell me a kit for a new deck with wooden riffles...
Most placer equipment is really made with gold in the 30 and larger mesh sizes in mind, though if carefully used can often get reasonable recovery down to the 50 mesh size.
Oleophilic means "affinity to or attracted to oils," and this includes gold an diamonds.
Once you get down to the black sands or a few tablespoons of material, the technique changes dramatically.
While recovery rates are important, they must necessarily be secondary to the volume of material processed. Running more material at lower recovery rates is generally preferable to increasing the efficiency of the system.
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts • Ask The Experts • Uncovering the Find of a Lifetime • Suction Dredging Battle Escalates • Guinea Africa: Gold, Ebola, and a Monkey Barbecue • Finding Gold in Tailing Piles • Small-Scale Processing of Hard Rock Ores • 2014 Index - Annual Tables of Content • Why Did This Silver Mine Close? - Pt III • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices