Small Mining Operations
Evaluating Gold Recovery with Mass Balance Calculations
March 2021 by Keith Bowen
Whether you are placer or hard rock gold mining, maximizing the efficiency of your recovery process is very important to success, and accurate testing is necessary to do so.
My First Carolina Nugget
On my weekends off I spent many hours dredging the Second Broad River from Cane Creek Road up to the headwaters. I used a three-inch dredge with air and graduated to a five-inch with air.
Shaker Tables for Processing Hard Rock Ores
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.
Good Research and Bad Luck
With every look at the box I was pulling out a few pickers and a nugget or two. The smile I had the previous night just got bigger and bigger throughout the day.
Cyanide-Free Gold Separation
Some ores—mostly those with a high free gold content—are very amenable to gravity concentration. Well oxidized ores containing coarse gold are usually best for non-cyanide processes. Ores with significant sulfide content may require the...
Refractory Gold Processing
After your excitement peaks when you first receive the high gold assay from the vein you just exposed, you ponder how you will extract and sell your gold. You will need to develop a flow sheet for your process to optimize your recovery and minimize your costs and permit requirements.
Crushing Quartz in Calaveras County: A Placer Miner Learns New Tricks
I had never run an impact mill before, but anything involving rocks, water and a big electric motor sounded great.
Using A Blasting Machine in Rock Breaking
Whatever system you plan to use will require a way to safely initiate the explosives from a distance. In this article, we’re going to learn the basics of electric blasting and get a hands-on example…
The Bawl Mill • Ask The Experts - Info on Santa Cruz beach placers? • Ask The Experts - Detectors and flour gold • Ask The Experts - Why is the gold in these clays? • Ask The Experts - Can you explain colloidal gold? • Ask The Experts - Where did this kimberlite come from? • Ask The Experts - Can gold particles combine to form a nugget? • Placer Gold Deposits in the Western States • Clues for Detecting Ancient River Channels and Flats • What Is Your Grade? • State of Idaho Looks to Invest in Gold and Silver • Colorado Uranium Mining in the 1950s Boom • Drywashing for Desert Gold—Part II • Decoding Dredge Capacity • I Just Tripped Over A Nugget • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices