Laboratory Testing & General Mineral Processing Engineering

Laboratory Testing & General Mineral Processing Engineering

  • To participate in the 911Metallurgist Forums, be sure to JOIN & LOGIN
  • Use Add New Topic to ask a New Question/Discussion about Mineral Processing or Laboratory Work.
  • OR Select a Topic that Interests you.
  • Use Add Reply = to Reply/Participate in a Topic/Discussion (most frequent).
    Using Add Reply allows you to Attach Images or PDF files and provide a more complete input.
  • Use Add Comment = to comment on someone else’s Reply in an already active Topic/Discussion.

Bottle roll leaching - gold (2 replies)

S
Pillai
6 years ago
Pillai 6 years ago

i have done many bottle roll trials with the same feed of the CIL/CIP tanks but bottle roll trials give lesser recovery than CIL/CIP 's recovery. Anybody had the same situation? any ideas?

R
Richard S
6 years ago
Richard S 6 years ago
Like

Check your oxygen content of the slurry.  You may have to bubble air or oxygen into the bottle roll.  If you run out of oxygen or the amount is too low, the cyanide leaching will stop or be lower than in the tanks.  You should be about 8ppm  oxygen at sea level if the slurry is saturated.

http://www.kuntermetallurgy.com/

R
Bhaduri
6 years ago
Bhaduri 6 years ago
Like

Richard is correct. In general, the reverse situation is true viz. lower recovery at the plant, You might want to corroborate the following stepwise & check plant slurries for the same: a) Grind size, b) DO levels, c) pH, d) Slurry temp, e) Residence time, f) CN gpL levels...have you done kinetics, g) Activated C levels...ENSURE that the C you add to the BR is ATTRITED otherwise you will lose the loaded fine C during screening of the slurry & most importantly h) is your BR mass balance correct viz. have you accounted for solution, solids, density, losses etc?

Please join and login to participate and leave a comment.