• To participate in the 911Metallurgist Forums, be sure to JOINLOGIN
  • Use Add New Topic to ask a New Question/Discussion about Leaching.
  • 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.

Carbon inventory and carbon activity improvement (1 reply)

Irene Ibz
3 days ago
Irene Ibz 3 days ago


I have been given a project on carbon inventory and carbon activity improvement. Currently in our plant we are getting a huge change in carbon inventory in CIL circuit during opening and closing stock. Also the activity of carbon is lowering. What could be a reason to these? What can I do to achieve this project?

thank you

2 days ago
Wayne 2 days ago
1 like by David

Hi Irene,

I can only speak on what I have learned in a demonstration plant but it should be similar.  Loading, unloading and moving the carbon around with an eductor system can take a toll on carbon and you are going to track how much you add to replace fines loss, Check this number over time and see if the addition rate has changed.  I don't know how you have been running to date and your tracking procedures. This needs to be done as part of the carbon inventory analysis as well as tracking any changes, operational or mechanical.

If you already do the above, much more information would need to be gathered.  Did you start recently and now notice the change, or have you been running regularly and are seeing a change in the carbon?  how you tackle the problem depends on the history up to this point.

For the activity, the carbon can get fouled and lose activity from organics, flocs etc.which reduce the adsorption ability of the carbon and it should be run through a rotary kiln with a reducing atmosphere ( no or minimal oxygen to prevent oxidation and more carbon loss) once quenched the carbon can be added back into the stream.  This should run on a regular basis so that you are always cleaning a portion of your carbon.  This should help keep the activity up.


A link for a company that recycles

Does this give you any Ideas?



Please join and login to participate and leave a comment.