Crushing, Grinding and Pulverizing
May 2017 by Alex Dolbeare
There are many different ways to get the gold out. We will take a look a few examples of crushing and grinding, and potentially which ores they may be best suited for.
Zinc is brittle and crystalline at ordinary temperatures, but when heated to between 110°C and 150°C it becomes ductile and malleable; it can then be rolled into sheets. The bluish-white metal is used principally for galvanizing iron, but also...
Regulators gave final approval to a nickel and copper mine for the Upper Peninsula.
What a difference a year makes. It makes one wonder if we still live on the same planet!
My first day using my pinpointer I detected an area where the fellas’ big guns had swooped in and cleaned up all the “big gold” and I got over sixty tiny pieces of gold.
“Scandals, scandals, everywhere, and not an end in sight!” might be the tag line of a musical depicting the financial markets as they near the end of a particularly tumultuous year. First we had the massive accounting scandals associated with the Enron collapse. This was followed by the corporate scandals where inaccurate and misleading research of one sort or another made headlines. But none of those compare in possible scope to the mutual fund scandals...
from H. Mason Coggin, PE & LS
• Pruitt out at EPA
• NDAA still under negotiation
• AMRA’s California mining bill fails to reach floor vote
The Bawl Mill • Legislative and Regulatory Update • Ask The Experts: How many claims can I file in Arizona? • Ask The Experts: What should I do with a large amount of old placer concentrates? • Shaker Tables for Processing Hard Rock Ores • Becoming a Successful Detectorist • Hand Panning Micro-Fine Gold • Sampling, Hydro-Shocking & Cleaning Quartz-Gold Specimens • My Lucky Thirteen Nuggets • A Break in the Weather • From the Editor • Prospecting Knowledge -- Pass It On! • Melman on Gold & Silver • Mining Stock Quotes and Mineral & Metal Prices • Over The Divide: Miles John Mitchell