Determining The Optimal Crushing Size for Gravity Recovery
February 2020 by Steve Gaber
It’s not easy to figure out what is best without testing, and so a certain level of confusion has developed about how small the ore ought to be crushed.
While the Water Board documented the selenium levels in fish and noted they exceed the levels of mercury, they have yet to acknowledge the numerous scientific studies that show selenium effectively neutralizes the effects of mercury.
This is just the type of specimen that could have been easily ignored by the old-time miners. It felt a little heavier in my hand than a chunk of quartz of that size ought to have been.
The holes were overloaded with explosives, but I didn’t know it. I was just a green mining engineer fresh out of school and told to watch as the experienced miners set the charge.
Fran, and I had made a practice of turning big boulders in gold producing areas to find some great rewards. Sometimes it was slow and frustrating, but in the end “We got the gold!”
My girlfriend Beth and I decided to take our canoe down the Yukon and do some gold dredging...
Because these crevices catch and hold gold so well, it's worthwhile to learn how they form, which ones are good for catching gold and which ones are not.
How big is the deposit? Are there boulders you will need to move? Do you just want to recover the nuggets or do you think there is good fine gold that you will also want to capture?
The Bawl Mill • Ask The Experts - Can you explain how caliche forms? • Ask The Experts - How does gold form? • Ask The Experts - Do you think it’s realistic for a detectorist to recover a couple of ounces per week if working full time? • Ask The Experts - Can you suggest proper discrimination settings for my detector? • Time to Stake Your Own Mining Claim • A Day On The Yuba River • Gold Prospecting for Better or Worse: The Pains of Prospecting • To Foam or Not to Foam • Following Man-Made Ditches to Recover More Gold • Sixteen to One Gold Mine: Going Underground - Pt II • All About Native Silver • Internet Forum Gold • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices