FLOW SHEET DEVELOPMENT


In order for Goldfield Engineering to develop a flow sheet which will process the gold or gemstones in an efficient and cost-effective manner, the following information about your minesite should be provided:
Company Name
Name
Phone Number
Fax Number
E-mail    

  1) How many YPH (MPH) do you want to process?         Yards/ hour     Meters/ hour

  2) Size fractions of the feed material.    3) Characteristics of the feed material.

%

 Feed Size
+10"
+4" to -10"
+1" to -4"
+3/8" to -1"
+1/4" to -3/8"
+1/16" to -1/4"
slimes

%

 Composition
Black Sand
Magnetite
Sand and Gravel
Heavy Clay (Difficult Wash)
Rounded Rock
Sharp Edge Rock
Lots of Large Boulders

4) What amount of water is available for washing?    GPM     LPM
Will you need to recirculate the water?     How do you intend to handle the tails from the washplant?
Yes    No Gravity Flow    Conveyed    Pumped

  5) If there is a lot of clay present, and a high percentage of fine gold, we like to de-slime the slurry after the trommel and before the recovery system - using a slurry pump to pressurize hydro-cyclones. 

Do you want to deslime?    Yes    No

 6) How far away is the wash water source from the recovery site, and what is the difference in elevation?
Approximate Distance                Feet     Meters
Approximate Elevation       Feet     Meters

  7) Do you prefer electric motors or diesel engines to drive the pump?    Electric    Diesel

  8) How will you feed the washplant?
Excavator/ front end loader.
Hopper/ Feeder. Quote Feeder?     Yes     No
Dredge Type of Washplant     Land Based     Floating

  9)     Recover Gold  10)   Recover Gems
Shape of the Gold.
  Rounded  Sharp  Foil (1 micron thick) 		    Type of Gemstones
   
Sieve analysis of the Gold. Size fractions of rough gemstones

Granular Scale
 % Mesh Size Weight Particles Au
ASTM mm. mg.  per g.
+10 2.0 133.0 8
+14 1.4 59.5 17
+18 1.0 27.00 37
+25 0.71 9.11 110
+35 0.50 4.91 204
+60 0.25 0.37 2703
+100 0.147 0.27 3704
+200 0.075 0.032 31250

%

 Rough Gem Size
+1"
+1/2" to -1"
+1/4" to -1/2"
+1/8" to -1/4"
+1/16" to -1/8"
-1/16"

With answers to the above questions, we will be happy to prepare detailed quotations for your consideration.

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