Mercury toxicity due to the smelting of placer gold recovered by mercury amalgam | xltronic messageboard
 
You are not logged in!

F.A.Q
Log in

Register
  
 
  
 
(nobody)
...and 241 guests

Last 5 registered
Oplandisks
nothingstar
N_loop
yipe
foxtrotromeo

Browse members...
  
 
Members 8025
Messages 2613461
Today 4
Topics 127500
  
 
Messageboard index
Mercury toxicity due to the smelting of placer gold recovered by mercury amalgam
 

offline Barcode from United Kingdom on 2010-11-08 15:27 [#02397844]
Points: 1767 Status: Lurker



Gold deposits occur in quartz veins originally formed by
hydrothermal fluid flows through faults, or fissures in the
earth's crust. Gold that has been released from quartz
veins by erosion and deposited in river bed gravels or
beach sands is termed placer gold. The mining of placer
gold is now commonly undertaken by hydraulic excavators
which extract river bed gravel and deliver it to
processing plants where the fine gold bearing material is
separated by rotary screens and vibrating tables. This is
then examined closely so that free gold particles can be
collected (a process called 'tabling'), and the remaining
gold bearing sands mixed with metallic mercury in barrels
to extract the gold in the form of a mercury-gold amalgam.
After washing in water to remove any remaining
sand, the amalgam is placed in a sealed retort and heated
until the mercury has been evaporated off, condensed
and collected under water. The remaining gold along with
free gold obtained at the 'tabling stage' is then placed in
a crucible, smelted on a furnace and cast into ingots.


 

offline ijonspeches from 109P/Swift-Tuttle on 2010-11-08 16:53 [#02397856]
Points: 7841 Status: Lurker | Show recordbag



which are then formed to goldchains around mr-t´s neck
and teeth fo rappers.


 

offline Barcode from United Kingdom on 2010-11-08 17:28 [#02397859]
Points: 1767 Status: Lurker



U crazy fool!


 

offline atwood from The Library (United Kingdom) on 2010-11-08 19:31 [#02397875]
Points: 2236 Status: Regular | Show recordbag



Goldie looking star for you.


 


Messageboard index